/*
* Synaptics TouchPad PS/2 mouse driver
*
* 2003 Dmitry Torokhov <dtor@mail.ru>
* Added support for pass-through port
*
* 2003 Peter Osterlund <petero2@telia.com>
* Ported to 2.5 input device infrastructure.
*
* Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
* start merging tpconfig and gpm code to a xfree-input module
* adding some changes and extensions (ex. 3rd and 4th button)
*
* Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
* Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
* code for the special synaptics commands (from the tpconfig-source)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* Trademarks are the property of their respective owners.
*/
#include <linux/module.h>
#include <linux/input.h>
#include <linux/serio.h>
#include "psmouse.h"
#include "synaptics.h"
/*
* The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
* section 2.3.2, which says that they should be valid regardless of the
* actual size of the sensor.
*/
#define XMIN_NOMINAL 1472
#define XMAX_NOMINAL 5472
#define YMIN_NOMINAL 1408
#define YMAX_NOMINAL 4448
/*****************************************************************************
* Synaptics communications functions
****************************************************************************/
/*
* Use the Synaptics extended ps/2 syntax to write a special command byte.
* special command: 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
* is the command. A 0xF3 or 0xE9 must follow (see synaptics_send_cmd
* and synaptics_mode_cmd)
*/
static int synaptics_special_cmd(struct psmouse *psmouse, unsigned char command)
{
int i;
if (psmouse_command(psmouse, NULL, PSMOUSE_CMD_SETSCALE11))
return -1;
for (i = 6; i >= 0; i -= 2) {
unsigned char d = (command >> i) & 3;
if (psmouse_command(psmouse, &d, PSMOUSE_CMD_SETRES))
return -1;
}
return 0;
}
/*
* Send a command to the synpatics touchpad by special commands
*/
static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
{
if (synaptics_special_cmd(psmouse, c))
return -1;
if (psmouse_command(psmouse, param, PSMOUSE_CMD_GETINFO))
return -1;
return 0;
}
/*
* Set the synaptics touchpad mode byte by special commands
*/
static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
{
unsigned char param[1];
if (synaptics_special_cmd(psmouse, mode))
return -1;
param[0] = SYN_PS_SET_MODE2;
if (psmouse_command(psmouse, param, PSMOUSE_CMD_SETRATE))
return -1;
return 0;
}
static int synaptics_reset(struct psmouse *psmouse)
{
unsigned char r[2];
if (psmouse_command(psmouse, r, PSMOUSE_CMD_RESET_BAT))
return -1;
if (r[0] == PSMOUSE_RET_BAT && r[1] == PSMOUSE_RET_ID)
return 0;
return -1;
}
/*
* Read the model-id bytes from the touchpad
* see also SYN_MODEL_* macros
*/
static int synaptics_model_id(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
unsigned char mi[3];
if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
return -1;
priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
return 0;
}
/*
* Read the capability-bits from the touchpad
* see also the SYN_CAP_* macros
*/
static int synaptics_capability(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
unsigned char cap[3];
if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
return -1;
priv->capabilities = (cap[0]<<16) | (cap[1]<<8) | cap[2];
priv->ext_cap = 0;
if (!SYN_CAP_VALID(priv->capabilities))
return -1;
if (SYN_EXT_CAP_REQUESTS(priv->capabilities)) {
if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
printk(KERN_ERR "Synaptics claims to have extended capabilities,"
" but I'm not able to read them.");
} else
priv->ext_cap = (cap[0]<<16) | (cap[1]<<8) | cap[2];
}
return 0;
}
/*
* Identify Touchpad
* See also the SYN_ID_* macros
*/
static int synaptics_identify(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
unsigned char id[3];
if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
return -1;
priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
if (SYN_ID_IS_SYNAPTICS(priv->identity))
return 0;
return -1;
}
static void print_ident(struct synaptics_data *priv)
{
printk(KERN_INFO "Synaptics Touchpad, model: %ld\n", SYN_ID_MODEL(priv->identity));
printk(KERN_INFO " Firmware: %ld.%ld\n", SYN_ID_MAJOR(priv->identity),
SYN_ID_MINOR(priv->identity));
if (SYN_MODEL_ROT180(priv->model_id))
printk(KERN_INFO " 180 degree mounted touchpad\n");
if (SYN_MODEL_PORTRAIT(priv->model_id))
printk(KERN_INFO " portrait touchpad\n");
printk(KERN_INFO " Sensor: %ld\n", SYN_MODEL_SENSOR(priv->model_id));
if (SYN_MODEL_NEWABS(priv->model_id))
printk(KERN_INFO " new absolute packet format\n");
if (SYN_MODEL_PEN(priv->model_id))
printk(KERN_INFO " pen detection\n");
if (SYN_CAP_EXTENDED(priv->capabilities)) {
printk(KERN_INFO " Touchpad has extended capability bits\n");
if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) <= 8)
printk(KERN_INFO " -> %d multi-buttons, i.e. besides standard buttons\n",
(int)(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)));
else if (SYN_CAP_FOUR_BUTTON(priv->capabilities))
printk(KERN_INFO " -> four buttons\n");
if (SYN_CAP_MULTIFINGER(priv->capabilities))
printk(KERN_INFO " -> multifinger detection\n");
if (SYN_CAP_PALMDETECT(priv->capabilities))
printk(KERN_INFO " -> palm detection\n");
if (SYN_CAP_PASS_THROUGH(priv->capabilities))
printk(KERN_INFO " -> pass-through port\n");
}
}
static int synaptics_query_hardware(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
int retries = 0;
int mode;
while ((retries++ < 3) && synaptics_reset(psmouse))
printk(KERN_ERR "synaptics reset failed\n");
if (synaptics_identify(psmouse))
return -1;
if (synaptics_model_id(psmouse))
return -1;
if (synaptics_capability(psmouse))
return -1;
mode = SYN_BIT_ABSOLUTE_MODE | SYN_BIT_HIGH_RATE;
if (SYN_ID_MAJOR(priv->identity) >= 4)
mode |= SYN_BIT_DISABLE_GESTURE;
if (SYN_CAP_EXTENDED(priv->capabilities))
mode |= SYN_BIT_W_MODE;
if (synaptics_mode_cmd(psmouse, mode))
return -1;
return 0;
}
/*****************************************************************************
* Synaptics pass-through PS/2 port support
****************************************************************************/
static int synaptics_pt_open(struct serio *port)
{
return 0;
}
static void synaptics_pt_close(struct serio *port)
{
}
static int synaptics_pt_write(struct serio *port, unsigned char c)
{
struct psmouse *parent = port->driver;
char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
if (synaptics_special_cmd(parent, c))
return -1;
if (psmouse_command(parent, &rate_param, PSMOUSE_CMD_SETRATE))
return -1;
return 0;
}
static inline int synaptics_is_pt_packet(unsigned char *buf)
{
return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
}
static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
{
struct psmouse *child = ptport->private;
if (child) {
if (child->state == PSMOUSE_ACTIVATED) {
serio_interrupt(ptport, packet[1], 0, NULL);
serio_interrupt(ptport, packet[4], 0, NULL);
serio_interrupt(ptport, packet[5], 0, NULL);
if (child->type >= PSMOUSE_GENPS)
serio_interrupt(ptport, packet[2], 0, NULL);
} else if (child->state != PSMOUSE_IGNORE) {
serio_interrupt(ptport, packet[1], 0, NULL);
}
}
}
int synaptics_pt_init(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
struct serio *port;
struct psmouse *child;
if (psmouse->type != PSMOUSE_SYNAPTICS)
return -1;
if (!SYN_CAP_EXTENDED(priv->capabilities))
return -1;
if (!SYN_CAP_PASS_THROUGH(priv->capabilities))
return -1;
priv->ptport = port = kmalloc(sizeof(struct serio), GFP_KERNEL);
if (!port) {
printk(KERN_ERR "synaptics: not enough memory to allocate serio port\n");
return -1;
}
memset(port, 0, sizeof(struct serio));
port->type = SERIO_PS_PSTHRU;
port->name = "Synaptics pass-through";
port->phys = "synaptics-pt/serio0";
port->write = synaptics_pt_write;
port->open = synaptics_pt_open;
port->close = synaptics_pt_close;
port->driver = psmouse;
printk(KERN_INFO "serio: %s port at %s\n", port->name, psmouse->phys);
serio_register_slave_port(port);
/* adjust the touchpad to child's choice of protocol */
child = port->private;
if (child && child->type >= PSMOUSE_GENPS) {
if (synaptics_mode_cmd(psmouse, (SYN_BIT_ABSOLUTE_MODE |
SYN_BIT_HIGH_RATE |
SYN_BIT_DISABLE_GESTURE |
SYN_BIT_FOUR_BYTE_CLIENT |
SYN_BIT_W_MODE)))
printk(KERN_INFO "synaptics: failed to enable 4-byte guest protocol\n");
}
return 0;
}
/*****************************************************************************
* Driver initialization/cleanup functions
****************************************************************************/
static inline void set_abs_params(struct input_dev *dev, int axis, int min, int max, int fuzz, int flat)
{
dev->absmin[axis] = min;
dev->absmax[axis] = max;
dev->absfuzz[axis] = fuzz;
dev->absflat[axis] = flat;
set_bit(axis, dev->absbit);
}
static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
{
set_bit(EV_ABS, dev->evbit);
set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
set_bit(ABS_TOOL_WIDTH, dev->absbit);
set_bit(EV_KEY, dev->evbit);
set_bit(BTN_TOUCH, dev->keybit);
set_bit(BTN_TOOL_FINGER, dev->keybit);
set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
set_bit(BTN_LEFT, dev->keybit);
set_bit(BTN_RIGHT, dev->keybit);
set_bit(BTN_FORWARD, dev->keybit);
set_bit(BTN_BACK, dev->keybit);
if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)) {
switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
default:
/*
* if nExtBtn is greater than 8 it should be considered
* invalid and treated as 0
*/
break;
case 8:
set_bit(BTN_7, dev->keybit);
set_bit(BTN_6, dev->keybit);
case 6:
set_bit(BTN_5, dev->keybit);
set_bit(BTN_4, dev->keybit);
case 4:
set_bit(BTN_3, dev->keybit);
set_bit(BTN_2, dev->keybit);
case 2:
set_bit(BTN_1, dev->keybit);
set_bit(BTN_0, dev->keybit);
break;
}
}
clear_bit(EV_REL, dev->evbit);
clear_bit(REL_X, dev->relbit);
clear_bit(REL_Y, dev->relbit);
}
int synaptics_init(struct psmouse *psmouse)
{
struct synaptics_data *priv;
#ifndef CONFIG_MOUSE_PS2_SYNAPTICS
return -1;
#endif
psmouse->private = priv = kmalloc(sizeof(struct synaptics_data), GFP_KERNEL);
if (!priv)
return -1;
memset(priv, 0, sizeof(struct synaptics_data));
if (synaptics_query_hardware(psmouse)) {
printk(KERN_ERR "Unable to query/initialize Synaptics hardware.\n");
goto init_fail;
}
print_ident(priv);
set_input_params(&psmouse->dev, priv);
return 0;
init_fail:
kfree(priv);
return -1;
}
void synaptics_disconnect(struct psmouse *psmouse)
{
struct synaptics_data *priv = psmouse->private;
if (psmouse->type == PSMOUSE_SYNAPTICS && priv) {
synaptics_mode_cmd(psmouse, 0);
if (priv->ptport) {
serio_unregister_slave_port(priv->ptport);
kfree(priv->ptport);
}
kfree(priv);
}
}
/*****************************************************************************
* Functions to interpret the absolute mode packets
****************************************************************************/
static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
{
hw->up = 0;
hw->down = 0;
hw->b0 = 0;
hw->b1 = 0;
hw->b2 = 0;
hw->b3 = 0;
hw->b4 = 0;
hw->b5 = 0;
hw->b6 = 0;
hw->b7 = 0;
if (SYN_MODEL_NEWABS(priv->model_id)) {
hw->x = (((buf[3] & 0x10) << 8) |
((buf[1] & 0x0f) << 8) |
buf[4]);
hw->y = (((buf[3] & 0x20) << 7) |
((buf[1] & 0xf0) << 4) |
buf[5]);
hw->z = buf[2];
hw->w = (((buf[0] & 0x30) >> 2) |
((buf[0] & 0x04) >> 1) |
((buf[3] & 0x04) >> 2));
hw->left = (buf[0] & 0x01) ? 1 : 0;
hw->right = (buf[0] & 0x02) ? 1 : 0;
if (SYN_CAP_EXTENDED(priv->capabilities) &&
(SYN_CAP_FOUR_BUTTON(priv->capabilities))) {
hw->up = ((buf[3] & 0x01)) ? 1 : 0;
if (hw->left)
hw->up = !hw->up;
hw->down = ((buf[3] & 0x02)) ? 1 : 0;
if (hw->right)
hw->down = !hw->down;
}
if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
((buf[3] & 2) ? !hw->right : hw->right)) {
switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
default:
/*
* if nExtBtn is greater than 8 it should be
* considered invalid and treated as 0
*/
break;
case 8:
hw->b7 = ((buf[5] & 0x08)) ? 1 : 0;
hw->b6 = ((buf[4] & 0x08)) ? 1 : 0;
case 6:
hw->b5 = ((buf[5] & 0x04)) ? 1 : 0;
hw->b4 = ((buf[4] & 0x04)) ? 1 : 0;
case 4:
hw->b3 = ((buf[5] & 0x02)) ? 1 : 0;
hw->b2 = ((buf[4] & 0x02)) ? 1 : 0;
case 2:
hw->b1 = ((buf[5] & 0x01)) ? 1 : 0;
hw->b0 = ((buf[4] & 0x01)) ? 1 : 0;
}
}
} else {
hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
hw->left = (buf[0] & 0x01) ? 1 : 0;
hw->right = (buf[0] & 0x02) ? 1 : 0;
}
}
/*
* called for each full received packet from the touchpad
*/
static void synaptics_process_packet(struct psmouse *psmouse)
{
struct input_dev *dev = &psmouse->dev;
struct synaptics_data *priv = psmouse->private;
struct synaptics_hw_state hw;
int num_fingers;
int finger_width;
synaptics_parse_hw_state(psmouse->packet, priv, &hw);
if (hw.z > 0) {
num_fingers = 1;
finger_width = 5;
if (SYN_CAP_EXTENDED(priv->capabilities)) {
switch (hw.w) {
case 0 ... 1:
if (SYN_CAP_MULTIFINGER(priv->capabilities))
num_fingers = hw.w + 2;
break;
case 2:
if (SYN_MODEL_PEN(priv->model_id))
; /* Nothing, treat a pen as a single finger */
break;
case 4 ... 15:
if (SYN_CAP_PALMDETECT(priv->capabilities))
finger_width = hw.w;
break;
}
}
} else {
num_fingers = 0;
finger_width = 0;
}
/* Post events */
if (hw.z > 0) {
input_report_abs(dev, ABS_X, hw.x);
input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
}
input_report_abs(dev, ABS_PRESSURE, hw.z);
if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
input_report_key(dev, BTN_LEFT, hw.left);
input_report_key(dev, BTN_RIGHT, hw.right);
input_report_key(dev, BTN_FORWARD, hw.up);
input_report_key(dev, BTN_BACK, hw.down);
if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
switch(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
default:
/*
* if nExtBtn is greater than 8 it should be considered
* invalid and treated as 0
*/
break;
case 8:
input_report_key(dev, BTN_7, hw.b7);
input_report_key(dev, BTN_6, hw.b6);
case 6:
input_report_key(dev, BTN_5, hw.b5);
input_report_key(dev, BTN_4, hw.b4);
case 4:
input_report_key(dev, BTN_3, hw.b3);
input_report_key(dev, BTN_2, hw.b2);
case 2:
input_report_key(dev, BTN_1, hw.b1);
input_report_key(dev, BTN_0, hw.b0);
break;
}
input_sync(dev);
}
void synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
{
struct input_dev *dev = &psmouse->dev;
struct synaptics_data *priv = psmouse->private;
unsigned char data = psmouse->packet[psmouse->pktcnt - 1];
int newabs = SYN_MODEL_NEWABS(priv->model_id);
input_regs(dev, regs);
switch (psmouse->pktcnt) {
case 1:
if (newabs ? ((data & 0xC8) != 0x80) : ((data & 0xC0) != 0xC0)) {
printk(KERN_WARNING "Synaptics driver lost sync at 1st byte\n");
goto bad_sync;
}
break;
case 2:
if (!newabs && ((data & 0x60) != 0x00)) {
printk(KERN_WARNING "Synaptics driver lost sync at 2nd byte\n");
goto bad_sync;
}
break;
case 4:
if (newabs ? ((data & 0xC8) != 0xC0) : ((data & 0xC0) != 0x80)) {
printk(KERN_WARNING "Synaptics driver lost sync at 4th byte\n");
goto bad_sync;
}
break;
case 5:
if (!newabs && ((data & 0x60) != 0x00)) {
printk(KERN_WARNING "Synaptics driver lost sync at 5th byte\n");
goto bad_sync;
}
break;
default:
if (psmouse->pktcnt < 6)
break; /* Wait for full packet */
if (priv->out_of_sync) {
priv->out_of_sync = 0;
printk(KERN_NOTICE "Synaptics driver resynced.\n");
}
if (priv->ptport && synaptics_is_pt_packet(psmouse->packet))
synaptics_pass_pt_packet(priv->ptport, psmouse->packet);
else
synaptics_process_packet(psmouse);
psmouse->pktcnt = 0;
break;
}
return;
bad_sync:
priv->out_of_sync++;
psmouse->pktcnt = 0;
if (psmouse_resetafter > 0 && priv->out_of_sync == psmouse_resetafter) {
psmouse->state = PSMOUSE_IGNORE;
serio_rescan(psmouse->serio);
}
}
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