429 lines
12 KiB
C
429 lines
12 KiB
C
/*
|
|
* Stephen Evanchik <evanchsa@gmail.com>
|
|
*
|
|
* 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/slab.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/serio.h>
|
|
#include <linux/module.h>
|
|
#include <linux/input.h>
|
|
#include <linux/libps2.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/uaccess.h>
|
|
#include "psmouse.h"
|
|
#include "trackpoint.h"
|
|
|
|
/*
|
|
* Power-on Reset: Resets all trackpoint parameters, including RAM values,
|
|
* to defaults.
|
|
* Returns zero on success, non-zero on failure.
|
|
*/
|
|
static int trackpoint_power_on_reset(struct ps2dev *ps2dev)
|
|
{
|
|
unsigned char results[2];
|
|
int tries = 0;
|
|
|
|
/* Issue POR command, and repeat up to once if 0xFC00 received */
|
|
do {
|
|
if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
|
|
ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 2, TP_POR)))
|
|
return -1;
|
|
} while (results[0] == 0xFC && results[1] == 0x00 && ++tries < 2);
|
|
|
|
/* Check for success response -- 0xAA00 */
|
|
if (results[0] != 0xAA || results[1] != 0x00)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Device IO: read, write and toggle bit
|
|
*/
|
|
static int trackpoint_read(struct ps2dev *ps2dev,
|
|
unsigned char loc, unsigned char *results)
|
|
{
|
|
if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
|
|
ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 1, loc))) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trackpoint_write(struct ps2dev *ps2dev,
|
|
unsigned char loc, unsigned char val)
|
|
{
|
|
if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
|
|
ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_WRITE_MEM)) ||
|
|
ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
|
|
ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, val))) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trackpoint_toggle_bit(struct ps2dev *ps2dev,
|
|
unsigned char loc, unsigned char mask)
|
|
{
|
|
/* Bad things will happen if the loc param isn't in this range */
|
|
if (loc < 0x20 || loc >= 0x2F)
|
|
return -1;
|
|
|
|
if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
|
|
ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_TOGGLE)) ||
|
|
ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
|
|
ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, mask))) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int trackpoint_update_bit(struct ps2dev *ps2dev, unsigned char loc,
|
|
unsigned char mask, unsigned char value)
|
|
{
|
|
int retval = 0;
|
|
unsigned char data;
|
|
|
|
trackpoint_read(ps2dev, loc, &data);
|
|
if (((data & mask) == mask) != !!value)
|
|
retval = trackpoint_toggle_bit(ps2dev, loc, mask);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* Trackpoint-specific attributes
|
|
*/
|
|
struct trackpoint_attr_data {
|
|
size_t field_offset;
|
|
unsigned char command;
|
|
unsigned char mask;
|
|
unsigned char inverted;
|
|
unsigned char power_on_default;
|
|
};
|
|
|
|
static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf)
|
|
{
|
|
struct trackpoint_data *tp = psmouse->private;
|
|
struct trackpoint_attr_data *attr = data;
|
|
unsigned char value = *(unsigned char *)((char *)tp + attr->field_offset);
|
|
|
|
if (attr->inverted)
|
|
value = !value;
|
|
|
|
return sprintf(buf, "%u\n", value);
|
|
}
|
|
|
|
static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct trackpoint_data *tp = psmouse->private;
|
|
struct trackpoint_attr_data *attr = data;
|
|
unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
|
|
unsigned char value;
|
|
int err;
|
|
|
|
err = kstrtou8(buf, 10, &value);
|
|
if (err)
|
|
return err;
|
|
|
|
*field = value;
|
|
trackpoint_write(&psmouse->ps2dev, attr->command, value);
|
|
|
|
return count;
|
|
}
|
|
|
|
#define TRACKPOINT_INT_ATTR(_name, _command, _default) \
|
|
static struct trackpoint_attr_data trackpoint_attr_##_name = { \
|
|
.field_offset = offsetof(struct trackpoint_data, _name), \
|
|
.command = _command, \
|
|
.power_on_default = _default, \
|
|
}; \
|
|
PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
|
|
&trackpoint_attr_##_name, \
|
|
trackpoint_show_int_attr, trackpoint_set_int_attr)
|
|
|
|
static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct trackpoint_data *tp = psmouse->private;
|
|
struct trackpoint_attr_data *attr = data;
|
|
unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
|
|
unsigned int value;
|
|
int err;
|
|
|
|
err = kstrtouint(buf, 10, &value);
|
|
if (err)
|
|
return err;
|
|
|
|
if (value > 1)
|
|
return -EINVAL;
|
|
|
|
if (attr->inverted)
|
|
value = !value;
|
|
|
|
if (*field != value) {
|
|
*field = value;
|
|
trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask);
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
|
|
#define TRACKPOINT_BIT_ATTR(_name, _command, _mask, _inv, _default) \
|
|
static struct trackpoint_attr_data trackpoint_attr_##_name = { \
|
|
.field_offset = offsetof(struct trackpoint_data, \
|
|
_name), \
|
|
.command = _command, \
|
|
.mask = _mask, \
|
|
.inverted = _inv, \
|
|
.power_on_default = _default, \
|
|
}; \
|
|
PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
|
|
&trackpoint_attr_##_name, \
|
|
trackpoint_show_int_attr, trackpoint_set_bit_attr)
|
|
|
|
#define TRACKPOINT_UPDATE_BIT(_psmouse, _tp, _name) \
|
|
do { \
|
|
struct trackpoint_attr_data *_attr = &trackpoint_attr_##_name; \
|
|
\
|
|
trackpoint_update_bit(&_psmouse->ps2dev, \
|
|
_attr->command, _attr->mask, _tp->_name); \
|
|
} while (0)
|
|
|
|
#define TRACKPOINT_UPDATE(_power_on, _psmouse, _tp, _name) \
|
|
do { \
|
|
if (!_power_on || \
|
|
_tp->_name != trackpoint_attr_##_name.power_on_default) { \
|
|
if (!trackpoint_attr_##_name.mask) \
|
|
trackpoint_write(&_psmouse->ps2dev, \
|
|
trackpoint_attr_##_name.command, \
|
|
_tp->_name); \
|
|
else \
|
|
TRACKPOINT_UPDATE_BIT(_psmouse, _tp, _name); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define TRACKPOINT_SET_POWER_ON_DEFAULT(_tp, _name) \
|
|
(_tp->_name = trackpoint_attr_##_name.power_on_default)
|
|
|
|
TRACKPOINT_INT_ATTR(sensitivity, TP_SENS, TP_DEF_SENS);
|
|
TRACKPOINT_INT_ATTR(speed, TP_SPEED, TP_DEF_SPEED);
|
|
TRACKPOINT_INT_ATTR(inertia, TP_INERTIA, TP_DEF_INERTIA);
|
|
TRACKPOINT_INT_ATTR(reach, TP_REACH, TP_DEF_REACH);
|
|
TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS, TP_DEF_DRAGHYS);
|
|
TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG, TP_DEF_MINDRAG);
|
|
TRACKPOINT_INT_ATTR(thresh, TP_THRESH, TP_DEF_THRESH);
|
|
TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH, TP_DEF_UP_THRESH);
|
|
TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME, TP_DEF_Z_TIME);
|
|
TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV, TP_DEF_JENKS_CURV);
|
|
TRACKPOINT_INT_ATTR(drift_time, TP_DRIFT_TIME, TP_DEF_DRIFT_TIME);
|
|
|
|
TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, 0,
|
|
TP_DEF_PTSON);
|
|
TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, 0,
|
|
TP_DEF_SKIPBACK);
|
|
TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, 1,
|
|
TP_DEF_EXT_DEV);
|
|
|
|
static struct attribute *trackpoint_attrs[] = {
|
|
&psmouse_attr_sensitivity.dattr.attr,
|
|
&psmouse_attr_speed.dattr.attr,
|
|
&psmouse_attr_inertia.dattr.attr,
|
|
&psmouse_attr_reach.dattr.attr,
|
|
&psmouse_attr_draghys.dattr.attr,
|
|
&psmouse_attr_mindrag.dattr.attr,
|
|
&psmouse_attr_thresh.dattr.attr,
|
|
&psmouse_attr_upthresh.dattr.attr,
|
|
&psmouse_attr_ztime.dattr.attr,
|
|
&psmouse_attr_jenks.dattr.attr,
|
|
&psmouse_attr_drift_time.dattr.attr,
|
|
&psmouse_attr_press_to_select.dattr.attr,
|
|
&psmouse_attr_skipback.dattr.attr,
|
|
&psmouse_attr_ext_dev.dattr.attr,
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group trackpoint_attr_group = {
|
|
.attrs = trackpoint_attrs,
|
|
};
|
|
|
|
static int trackpoint_start_protocol(struct psmouse *psmouse, unsigned char *firmware_id)
|
|
{
|
|
unsigned char param[2] = { 0 };
|
|
|
|
if (ps2_command(&psmouse->ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
|
|
return -1;
|
|
|
|
if (param[0] != TP_MAGIC_IDENT)
|
|
return -1;
|
|
|
|
if (firmware_id)
|
|
*firmware_id = param[1];
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Write parameters to trackpad.
|
|
* in_power_on_state: Set to true if TP is in default / power-on state (ex. if
|
|
* power-on reset was run). If so, values will only be
|
|
* written to TP if they differ from power-on default.
|
|
*/
|
|
static int trackpoint_sync(struct psmouse *psmouse, bool in_power_on_state)
|
|
{
|
|
struct trackpoint_data *tp = psmouse->private;
|
|
|
|
if (!in_power_on_state) {
|
|
/*
|
|
* Disable features that may make device unusable
|
|
* with this driver.
|
|
*/
|
|
trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND,
|
|
TP_MASK_TWOHAND, TP_DEF_TWOHAND);
|
|
|
|
trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG,
|
|
TP_MASK_SOURCE_TAG, TP_DEF_SOURCE_TAG);
|
|
|
|
trackpoint_update_bit(&psmouse->ps2dev, TP_TOGGLE_MB,
|
|
TP_MASK_MB, TP_DEF_MB);
|
|
}
|
|
|
|
/*
|
|
* These properties can be changed in this driver. Only
|
|
* configure them if the values are non-default or if the TP is in
|
|
* an unknown state.
|
|
*/
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, sensitivity);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, inertia);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, speed);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, reach);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, draghys);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, mindrag);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, thresh);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, upthresh);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ztime);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, jenks);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, drift_time);
|
|
|
|
/* toggles */
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, press_to_select);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, skipback);
|
|
TRACKPOINT_UPDATE(in_power_on_state, psmouse, tp, ext_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void trackpoint_defaults(struct trackpoint_data *tp)
|
|
{
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, sensitivity);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, speed);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, reach);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, draghys);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, mindrag);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, thresh);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, upthresh);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ztime);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, jenks);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, drift_time);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, inertia);
|
|
|
|
/* toggles */
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, press_to_select);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, skipback);
|
|
TRACKPOINT_SET_POWER_ON_DEFAULT(tp, ext_dev);
|
|
}
|
|
|
|
static void trackpoint_disconnect(struct psmouse *psmouse)
|
|
{
|
|
sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
|
|
|
|
kfree(psmouse->private);
|
|
psmouse->private = NULL;
|
|
}
|
|
|
|
static int trackpoint_reconnect(struct psmouse *psmouse)
|
|
{
|
|
int reset_fail;
|
|
|
|
if (trackpoint_start_protocol(psmouse, NULL))
|
|
return -1;
|
|
|
|
reset_fail = trackpoint_power_on_reset(&psmouse->ps2dev);
|
|
if (trackpoint_sync(psmouse, !reset_fail))
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int trackpoint_detect(struct psmouse *psmouse, bool set_properties)
|
|
{
|
|
struct ps2dev *ps2dev = &psmouse->ps2dev;
|
|
unsigned char firmware_id;
|
|
unsigned char button_info;
|
|
int error;
|
|
|
|
if (trackpoint_start_protocol(psmouse, &firmware_id))
|
|
return -1;
|
|
|
|
if (!set_properties)
|
|
return 0;
|
|
|
|
if (trackpoint_read(ps2dev, TP_EXT_BTN, &button_info)) {
|
|
psmouse_warn(psmouse, "failed to get extended button data\n");
|
|
button_info = 0;
|
|
}
|
|
|
|
psmouse->private = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);
|
|
if (!psmouse->private)
|
|
return -ENOMEM;
|
|
|
|
psmouse->vendor = "IBM";
|
|
psmouse->name = "TrackPoint";
|
|
|
|
psmouse->reconnect = trackpoint_reconnect;
|
|
psmouse->disconnect = trackpoint_disconnect;
|
|
|
|
if ((button_info & 0x0f) >= 3)
|
|
__set_bit(BTN_MIDDLE, psmouse->dev->keybit);
|
|
|
|
__set_bit(INPUT_PROP_POINTER, psmouse->dev->propbit);
|
|
__set_bit(INPUT_PROP_POINTING_STICK, psmouse->dev->propbit);
|
|
|
|
trackpoint_defaults(psmouse->private);
|
|
|
|
error = trackpoint_power_on_reset(ps2dev);
|
|
|
|
/* Write defaults to TP only if reset fails. */
|
|
if (error)
|
|
trackpoint_sync(psmouse, false);
|
|
|
|
error = sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
|
|
if (error) {
|
|
psmouse_err(psmouse,
|
|
"failed to create sysfs attributes, error: %d\n",
|
|
error);
|
|
kfree(psmouse->private);
|
|
psmouse->private = NULL;
|
|
return -1;
|
|
}
|
|
|
|
psmouse_info(psmouse,
|
|
"IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
|
|
firmware_id,
|
|
(button_info & 0xf0) >> 4, button_info & 0x0f);
|
|
|
|
return 0;
|
|
}
|
|
|