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/*
* 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 <asm/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,
&
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