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/*
* Fujitsu B-series Lifebook PS/2 TouchScreen driver
*
* Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Kenan Esau <kenan.esau@conan.de>
*
* TouchScreen detection, absolute mode setting and packet layout is taken from
* Harald Hoyer's description of the device.
*
* 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.
*/
#include <linux/input.h>
#include <linux/serio.h>
#include <linux/libps2.h>
#include <linux/dmi.h>
#include "psmouse.h"
#include "lifebook.h"
static struct dmi_system_id lifebook_dmi_table[] = {
{
.ident = "Lifebook B",
.matches = {
DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
},
},
{ }
};
static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
{
unsigned char *packet = psmouse->packet;
struct input_dev *dev = psmouse->dev;
if (psmouse->pktcnt != 3)
return PSMOUSE_GOOD_DATA;
input_regs(dev, regs);
/* calculate X and Y */
if ((packet[0] & 0x08) == 0x00) {
input_report_abs(dev, ABS_X,
(packet[1] | ((packet[0] & 0x30) << 4)));
input_report_abs(dev, ABS_Y,
1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
} else {
input_report_rel(dev, REL_X,
((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
input_report_rel(dev, REL_Y,
-(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
}
input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
input_report_key(dev, BTN_TOUCH, packet[0] & 0x04);
input_sync(dev);
return PSMOUSE_FULL_PACKET;
}
static int lifebook_absolute_mode(struct psmouse *psmouse)
{
struct ps2dev *ps2dev = &psmouse->ps2dev;
unsigned char param;
if (psmouse_reset(psmouse))
return -1;
/*
Enable absolute output -- ps2_command fails always but if
you leave this call out the touchsreen will never send
absolute coordinates
*/
param = 0x07;
ps2_command(ps2dev, ¶m, PSMOUSE_CMD_SETRES);
return 0;
}
static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
{
unsigned char params[] = { 0, 1, 2, 2, 3 };
if (resolution == 0 || resolution > 400)
resolution = 400;
ps2_command(&psmouse->ps2dev, ¶ms[resolution / 100], PSMOUSE_CMD_SETRES);
psmouse->resolution = 50 << params[resolution / 100];
}
static void lifebook_disconnect(struct psmouse *psmouse)
{
psmouse_reset(psmouse);
}
int lifebook_detect(struct psmouse *psmouse, int set_properties)
{
if (!dmi_check_system(lifebook_dmi_table))
return -1;
if (set_properties) {
psmouse->vendor = "Fujitsu";
psmouse->name = "Lifebook TouchScreen";
}
return 0;
}
int lifebook_init(struct psmouse *psmouse)
{
struct input_dev *input_dev = psmouse->dev;
if (lifebook_absolute_mode(psmouse))
return -1;
input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL);
input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
input_set_abs_params(input_dev, ABS_X, 0, 1024, 0, 0);
input_set_abs_params(input_dev, ABS_Y, 0, 1024, 0, 0);
psmouse->protocol_handler = lifebook_process_byte;
psmouse->set_resolution = lifebook_set_resolution;
psmouse->disconnect = lifebook_disconnect;
psmouse->reconnect = lifebook_absolute_mode;
psmouse->pktsize = 3;
return 0;
}
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