From 24bf10ab2d72863a14187905fd992ca8119c809e Mon Sep 17 00:00:00 2001 From: Stefan Lucke Date: Sun, 18 Feb 2007 01:49:10 -0500 Subject: Input: psmouse - add support for eGalax PS/2 touchscreen controller Based on the touchkit USB and lifebook PS/2 touchscreen driver. The egalax touchsreen controller (PS/2 or USB version) is used in this 7" device: http://www.cartft.com/catalog/il/449 Signed-off-by: Michal Piotrowski Signed-off-by: Andrew Morton Signed-off-by: Dmitry Torokhov --- drivers/input/mouse/touchkit_ps2.c | 100 +++++++++++++++++++++++++++++++++++++ 1 file changed, 100 insertions(+) create mode 100644 drivers/input/mouse/touchkit_ps2.c (limited to 'drivers/input/mouse/touchkit_ps2.c') diff --git a/drivers/input/mouse/touchkit_ps2.c b/drivers/input/mouse/touchkit_ps2.c new file mode 100644 index 000000000000..7b977fd23571 --- /dev/null +++ b/drivers/input/mouse/touchkit_ps2.c @@ -0,0 +1,100 @@ +/* ---------------------------------------------------------------------------- + * touchkit_ps2.c -- Driver for eGalax TouchKit PS/2 Touchscreens + * + * Copyright (C) 2005 by Stefan Lucke + * Copyright (C) 2004 by Daniel Ritz + * Copyright (C) by Todd E. Johnson (mtouchusb.c) + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Based upon touchkitusb.c + * + * Vendor documentation is available in support section of: + * http://www.egalax.com.tw/ + */ + +#include +#include + +#include +#include +#include + +#include "psmouse.h" +#include "touchkit_ps2.h" + +#define TOUCHKIT_MAX_XC 0x07ff +#define TOUCHKIT_MAX_YC 0x07ff + +#define TOUCHKIT_CMD 0x0a +#define TOUCHKIT_CMD_LENGTH 1 + +#define TOUCHKIT_CMD_ACTIVE 'A' +#define TOUCHKIT_CMD_FIRMWARE_VERSION 'D' +#define TOUCHKIT_CMD_CONTROLLER_TYPE 'E' + +#define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c)) + +#define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01) +#define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2]) +#define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4]) + +static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse) +{ + unsigned char *packet = psmouse->packet; + struct input_dev *dev = psmouse->dev; + + if (psmouse->pktcnt != 5) + return PSMOUSE_GOOD_DATA; + + input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet)); + input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet)); + input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet)); + input_sync(dev); + + return PSMOUSE_FULL_PACKET; +} + +int touchkit_ps2_detect(struct psmouse *psmouse, int set_properties) +{ + struct input_dev *dev = psmouse->dev; + unsigned char param[3]; + int command; + + param[0] = TOUCHKIT_CMD_LENGTH; + param[1] = TOUCHKIT_CMD_ACTIVE; + command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD); + + if (ps2_command(&psmouse->ps2dev, param, command)) + return -ENODEV; + + if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 || + param[2] != TOUCHKIT_CMD_ACTIVE) + return -ENODEV; + + if (set_properties) { + dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS); + set_bit(BTN_TOUCH, dev->keybit); + input_set_abs_params(dev, ABS_X, 0, TOUCHKIT_MAX_XC, 0, 0); + input_set_abs_params(dev, ABS_Y, 0, TOUCHKIT_MAX_YC, 0, 0); + + psmouse->vendor = "eGalax"; + psmouse->name = "Touchscreen"; + psmouse->protocol_handler = touchkit_ps2_process_byte; + psmouse->pktsize = 5; + } + + return 0; +} -- cgit v1.2.3-59-g8ed1b