305 lines
8.8 KiB
C
305 lines
8.8 KiB
C
/*
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* Stephen Evanchik <evanchsa@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*
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* Trademarks are the property of their respective owners.
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*/
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#include <linux/delay.h>
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#include <linux/serio.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/input.h>
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#include <linux/libps2.h>
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#include <linux/proc_fs.h>
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#include <asm/uaccess.h>
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#include "psmouse.h"
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#include "trackpoint.h"
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/*
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* Device IO: read, write and toggle bit
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*/
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static int trackpoint_read(struct ps2dev *ps2dev, unsigned char loc, unsigned char *results)
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{
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if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
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ps2_command(ps2dev, results, MAKE_PS2_CMD(0, 1, loc))) {
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return -1;
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}
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return 0;
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}
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static int trackpoint_write(struct ps2dev *ps2dev, unsigned char loc, unsigned char val)
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{
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if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
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ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_WRITE_MEM)) ||
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ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
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ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, val))) {
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return -1;
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}
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return 0;
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}
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static int trackpoint_toggle_bit(struct ps2dev *ps2dev, unsigned char loc, unsigned char mask)
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{
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/* Bad things will happen if the loc param isn't in this range */
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if (loc < 0x20 || loc >= 0x2F)
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return -1;
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if (ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_COMMAND)) ||
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ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, TP_TOGGLE)) ||
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ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, loc)) ||
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ps2_command(ps2dev, NULL, MAKE_PS2_CMD(0, 0, mask))) {
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return -1;
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}
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return 0;
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}
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/*
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* Trackpoint-specific attributes
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*/
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struct trackpoint_attr_data {
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size_t field_offset;
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unsigned char command;
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unsigned char mask;
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};
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static ssize_t trackpoint_show_int_attr(struct psmouse *psmouse, void *data, char *buf)
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{
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struct trackpoint_data *tp = psmouse->private;
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struct trackpoint_attr_data *attr = data;
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unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
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return sprintf(buf, "%u\n", *field);
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}
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static ssize_t trackpoint_set_int_attr(struct psmouse *psmouse, void *data,
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const char *buf, size_t count)
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{
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struct trackpoint_data *tp = psmouse->private;
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struct trackpoint_attr_data *attr = data;
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unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
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unsigned long value;
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char *rest;
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value = simple_strtoul(buf, &rest, 10);
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if (*rest || value > 255)
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return -EINVAL;
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*field = value;
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trackpoint_write(&psmouse->ps2dev, attr->command, value);
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return count;
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}
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#define TRACKPOINT_INT_ATTR(_name, _command) \
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static struct trackpoint_attr_data trackpoint_attr_##_name = { \
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.field_offset = offsetof(struct trackpoint_data, _name), \
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.command = _command, \
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}; \
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PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
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&trackpoint_attr_##_name, \
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trackpoint_show_int_attr, trackpoint_set_int_attr)
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static ssize_t trackpoint_set_bit_attr(struct psmouse *psmouse, void *data,
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const char *buf, size_t count)
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{
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struct trackpoint_data *tp = psmouse->private;
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struct trackpoint_attr_data *attr = data;
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unsigned char *field = (unsigned char *)((char *)tp + attr->field_offset);
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unsigned long value;
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char *rest;
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value = simple_strtoul(buf, &rest, 10);
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if (*rest || value > 1)
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return -EINVAL;
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if (*field != value) {
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*field = value;
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trackpoint_toggle_bit(&psmouse->ps2dev, attr->command, attr->mask);
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}
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return count;
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}
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#define TRACKPOINT_BIT_ATTR(_name, _command, _mask) \
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static struct trackpoint_attr_data trackpoint_attr_##_name = { \
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.field_offset = offsetof(struct trackpoint_data, _name), \
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.command = _command, \
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.mask = _mask, \
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}; \
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PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO, \
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&trackpoint_attr_##_name, \
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trackpoint_show_int_attr, trackpoint_set_bit_attr)
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TRACKPOINT_INT_ATTR(sensitivity, TP_SENS);
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TRACKPOINT_INT_ATTR(speed, TP_SPEED);
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TRACKPOINT_INT_ATTR(inertia, TP_INERTIA);
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TRACKPOINT_INT_ATTR(reach, TP_REACH);
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TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS);
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TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG);
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TRACKPOINT_INT_ATTR(thresh, TP_THRESH);
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TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH);
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TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME);
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TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV);
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TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON);
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TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
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TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
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static struct attribute *trackpoint_attrs[] = {
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&psmouse_attr_sensitivity.dattr.attr,
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&psmouse_attr_speed.dattr.attr,
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&psmouse_attr_inertia.dattr.attr,
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&psmouse_attr_reach.dattr.attr,
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&psmouse_attr_draghys.dattr.attr,
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&psmouse_attr_mindrag.dattr.attr,
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&psmouse_attr_thresh.dattr.attr,
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&psmouse_attr_upthresh.dattr.attr,
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&psmouse_attr_ztime.dattr.attr,
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&psmouse_attr_jenks.dattr.attr,
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&psmouse_attr_press_to_select.dattr.attr,
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&psmouse_attr_skipback.dattr.attr,
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&psmouse_attr_ext_dev.dattr.attr,
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NULL
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};
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static struct attribute_group trackpoint_attr_group = {
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.attrs = trackpoint_attrs,
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};
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static void trackpoint_disconnect(struct psmouse *psmouse)
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{
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sysfs_remove_group(&psmouse->ps2dev.serio->dev.kobj, &trackpoint_attr_group);
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kfree(psmouse->private);
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psmouse->private = NULL;
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}
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static int trackpoint_sync(struct psmouse *psmouse)
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{
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unsigned char toggle;
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struct trackpoint_data *tp = psmouse->private;
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if (!tp)
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return -1;
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/* Disable features that may make device unusable with this driver */
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trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle);
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if (toggle & TP_MASK_TWOHAND)
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trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, TP_MASK_TWOHAND);
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trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, &toggle);
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if (toggle & TP_MASK_SOURCE_TAG)
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trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, TP_MASK_SOURCE_TAG);
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trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_MB, &toggle);
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if (toggle & TP_MASK_MB)
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trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_MB, TP_MASK_MB);
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/* Push the config to the device */
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trackpoint_write(&psmouse->ps2dev, TP_SENS, tp->sensitivity);
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trackpoint_write(&psmouse->ps2dev, TP_INERTIA, tp->inertia);
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trackpoint_write(&psmouse->ps2dev, TP_SPEED, tp->speed);
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trackpoint_write(&psmouse->ps2dev, TP_REACH, tp->reach);
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trackpoint_write(&psmouse->ps2dev, TP_DRAGHYS, tp->draghys);
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trackpoint_write(&psmouse->ps2dev, TP_MINDRAG, tp->mindrag);
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trackpoint_write(&psmouse->ps2dev, TP_THRESH, tp->thresh);
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trackpoint_write(&psmouse->ps2dev, TP_UP_THRESH, tp->upthresh);
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trackpoint_write(&psmouse->ps2dev, TP_Z_TIME, tp->ztime);
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trackpoint_write(&psmouse->ps2dev, TP_JENKS_CURV, tp->jenks);
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trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_PTSON, &toggle);
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if (((toggle & TP_MASK_PTSON) == TP_MASK_PTSON) != tp->press_to_select)
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trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_PTSON, TP_MASK_PTSON);
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trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, &toggle);
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if (((toggle & TP_MASK_SKIPBACK) == TP_MASK_SKIPBACK) != tp->skipback)
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trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK);
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trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, &toggle);
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if (((toggle & TP_MASK_EXT_DEV) == TP_MASK_EXT_DEV) != tp->ext_dev)
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trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV);
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return 0;
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}
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static void trackpoint_defaults(struct trackpoint_data *tp)
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{
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tp->press_to_select = TP_DEF_PTSON;
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tp->sensitivity = TP_DEF_SENS;
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tp->speed = TP_DEF_SPEED;
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tp->reach = TP_DEF_REACH;
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tp->draghys = TP_DEF_DRAGHYS;
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tp->mindrag = TP_DEF_MINDRAG;
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tp->thresh = TP_DEF_THRESH;
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tp->upthresh = TP_DEF_UP_THRESH;
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tp->ztime = TP_DEF_Z_TIME;
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tp->jenks = TP_DEF_JENKS_CURV;
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tp->inertia = TP_DEF_INERTIA;
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tp->skipback = TP_DEF_SKIPBACK;
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tp->ext_dev = TP_DEF_EXT_DEV;
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}
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int trackpoint_detect(struct psmouse *psmouse, int set_properties)
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{
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struct trackpoint_data *priv;
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struct ps2dev *ps2dev = &psmouse->ps2dev;
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unsigned char firmware_id;
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unsigned char button_info;
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unsigned char param[2];
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param[0] = param[1] = 0;
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if (ps2_command(ps2dev, param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
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return -1;
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if (param[0] != TP_MAGIC_IDENT)
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return -1;
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if (!set_properties)
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return 0;
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firmware_id = param[1];
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if (trackpoint_read(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {
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printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n");
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button_info = 0;
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}
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psmouse->private = priv = kcalloc(1, sizeof(struct trackpoint_data), GFP_KERNEL);
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if (!priv)
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return -1;
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psmouse->vendor = "IBM";
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psmouse->name = "TrackPoint";
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psmouse->reconnect = trackpoint_sync;
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psmouse->disconnect = trackpoint_disconnect;
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trackpoint_defaults(priv);
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trackpoint_sync(psmouse);
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sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);
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printk(KERN_INFO "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",
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firmware_id, (button_info & 0xf0) >> 4, button_info & 0x0f);
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return 0;
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}
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