/* * 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/delay.h>#include <linux/serio.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/input.h>#include <linux/libps2.h>#include <linux/proc_fs.h>#include <asm/uaccess.h>#include "psmouse.h"#include "trackpoint.h" /* * 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;}  /* * Trackpoint-specific attributes */struct trackpoint_attr_data {	size_t field_offset;	unsigned char command;	unsigned char mask;	unsigned char inverted;}; 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 long value;	char *rest; 	value = simple_strtoul(buf, &rest, 10);	if (*rest || value > 255)		return -EINVAL; 	*field = value;	trackpoint_write(&psmouse->ps2dev, attr->command, value); 	return count;} #define TRACKPOINT_INT_ATTR(_name, _command)					\	static struct trackpoint_attr_data trackpoint_attr_##_name = {		\		.field_offset = offsetof(struct trackpoint_data, _name),	\		.command = _command,						\	};									\	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 long value;	char *rest; 	value = simple_strtoul(buf, &rest, 10);	if (*rest || 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)				\	static struct trackpoint_attr_data trackpoint_attr_##_name = {		\		.field_offset	= offsetof(struct trackpoint_data, _name),	\		.command	= _command,					\		.mask		= _mask,					\		.inverted	= _inv,						\	};									\	PSMOUSE_DEFINE_ATTR(_name, S_IWUSR | S_IRUGO,				\			    &trackpoint_attr_##_name,				\			    trackpoint_show_int_attr, trackpoint_set_bit_attr) TRACKPOINT_INT_ATTR(sensitivity, TP_SENS);TRACKPOINT_INT_ATTR(speed, TP_SPEED);TRACKPOINT_INT_ATTR(inertia, TP_INERTIA);TRACKPOINT_INT_ATTR(reach, TP_REACH);TRACKPOINT_INT_ATTR(draghys, TP_DRAGHYS);TRACKPOINT_INT_ATTR(mindrag, TP_MINDRAG);TRACKPOINT_INT_ATTR(thresh, TP_THRESH);TRACKPOINT_INT_ATTR(upthresh, TP_UP_THRESH);TRACKPOINT_INT_ATTR(ztime, TP_Z_TIME);TRACKPOINT_INT_ATTR(jenks, TP_JENKS_CURV); TRACKPOINT_BIT_ATTR(press_to_select, TP_TOGGLE_PTSON, TP_MASK_PTSON, 0);TRACKPOINT_BIT_ATTR(skipback, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK, 0);TRACKPOINT_BIT_ATTR(ext_dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV, 1); 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_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;} static int trackpoint_sync(struct psmouse *psmouse){	struct trackpoint_data *tp = psmouse->private;	unsigned char toggle; 	/* Disable features that may make device unusable with this driver */	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, &toggle);	if (toggle & TP_MASK_TWOHAND)		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_TWOHAND, TP_MASK_TWOHAND); 	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, &toggle);	if (toggle & TP_MASK_SOURCE_TAG)		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SOURCE_TAG, TP_MASK_SOURCE_TAG); 	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_MB, &toggle);	if (toggle & TP_MASK_MB)		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_MB, TP_MASK_MB); 	/* Push the config to the device */	trackpoint_write(&psmouse->ps2dev, TP_SENS, tp->sensitivity);	trackpoint_write(&psmouse->ps2dev, TP_INERTIA, tp->inertia);	trackpoint_write(&psmouse->ps2dev, TP_SPEED, tp->speed); 	trackpoint_write(&psmouse->ps2dev, TP_REACH, tp->reach);	trackpoint_write(&psmouse->ps2dev, TP_DRAGHYS, tp->draghys);	trackpoint_write(&psmouse->ps2dev, TP_MINDRAG, tp->mindrag); 	trackpoint_write(&psmouse->ps2dev, TP_THRESH, tp->thresh);	trackpoint_write(&psmouse->ps2dev, TP_UP_THRESH, tp->upthresh); 	trackpoint_write(&psmouse->ps2dev, TP_Z_TIME, tp->ztime);	trackpoint_write(&psmouse->ps2dev, TP_JENKS_CURV, tp->jenks); 	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_PTSON, &toggle);	if (((toggle & TP_MASK_PTSON) == TP_MASK_PTSON) != tp->press_to_select)		 trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_PTSON, TP_MASK_PTSON); 	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, &toggle);	if (((toggle & TP_MASK_SKIPBACK) == TP_MASK_SKIPBACK) != tp->skipback)		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_SKIPBACK, TP_MASK_SKIPBACK); 	trackpoint_read(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, &toggle);	if (((toggle & TP_MASK_EXT_DEV) == TP_MASK_EXT_DEV) != tp->ext_dev)		trackpoint_toggle_bit(&psmouse->ps2dev, TP_TOGGLE_EXT_DEV, TP_MASK_EXT_DEV); 	return 0;} static void trackpoint_defaults(struct trackpoint_data *tp){	tp->press_to_select = TP_DEF_PTSON;	tp->sensitivity = TP_DEF_SENS;	tp->speed = TP_DEF_SPEED;	tp->reach = TP_DEF_REACH; 	tp->draghys = TP_DEF_DRAGHYS;	tp->mindrag = TP_DEF_MINDRAG; 	tp->thresh = TP_DEF_THRESH;	tp->upthresh = TP_DEF_UP_THRESH; 	tp->ztime = TP_DEF_Z_TIME;	tp->jenks = TP_DEF_JENKS_CURV; 	tp->inertia = TP_DEF_INERTIA;	tp->skipback = TP_DEF_SKIPBACK;	tp->ext_dev = TP_DEF_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){	if (trackpoint_start_protocol(psmouse, NULL))		return -1; 	if (trackpoint_sync(psmouse))		return -1; 	return 0;} int trackpoint_detect(struct psmouse *psmouse, int set_properties){	struct trackpoint_data *priv;	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(&psmouse->ps2dev, TP_EXT_BTN, &button_info)) {		printk(KERN_WARNING "trackpoint.c: failed to get extended button data\n");		button_info = 0;	} 	psmouse->private = priv = kzalloc(sizeof(struct trackpoint_data), GFP_KERNEL);	if (!priv)		return -1; 	psmouse->vendor = "IBM";	psmouse->name = "TrackPoint"; 	psmouse->reconnect = trackpoint_reconnect;	psmouse->disconnect = trackpoint_disconnect; 	trackpoint_defaults(priv);	trackpoint_sync(psmouse); 	error = sysfs_create_group(&ps2dev->serio->dev.kobj, &trackpoint_attr_group);	if (error) {		printk(KERN_ERR			"trackpoint.c: failed to create sysfs attributes, error: %d\n",			error);		kfree(priv);		return -1;	} 	printk(KERN_INFO "IBM TrackPoint firmware: 0x%02x, buttons: %d/%d\n",		firmware_id, (button_info & 0xf0) >> 4, button_info & 0x0f); 	return 0;}