blob: 1fd8f5e192f9d4de9fdb48974e31fc7a6e0f97ab [file] [log] [blame]
Stefan Lucke24bf10a2007-02-18 01:49:10 -05001/* ----------------------------------------------------------------------------
2 * touchkit_ps2.c -- Driver for eGalax TouchKit PS/2 Touchscreens
3 *
4 * Copyright (C) 2005 by Stefan Lucke
5 * Copyright (C) 2004 by Daniel Ritz
6 * Copyright (C) by Todd E. Johnson (mtouchusb.c)
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * Based upon touchkitusb.c
23 *
Justin P. Mattock631dd1a2010-10-18 11:03:14 +020024 * Vendor documentation is available at:
25 * http://home.eeti.com.tw/web20/drivers/Software%20Programming%20Guide_v2.0.pdf
Stefan Lucke24bf10a2007-02-18 01:49:10 -050026 */
27
28#include <linux/kernel.h>
Stefan Lucke24bf10a2007-02-18 01:49:10 -050029
30#include <linux/input.h>
31#include <linux/serio.h>
32#include <linux/libps2.h>
33
34#include "psmouse.h"
35#include "touchkit_ps2.h"
36
37#define TOUCHKIT_MAX_XC 0x07ff
38#define TOUCHKIT_MAX_YC 0x07ff
39
40#define TOUCHKIT_CMD 0x0a
41#define TOUCHKIT_CMD_LENGTH 1
42
43#define TOUCHKIT_CMD_ACTIVE 'A'
44#define TOUCHKIT_CMD_FIRMWARE_VERSION 'D'
45#define TOUCHKIT_CMD_CONTROLLER_TYPE 'E'
46
47#define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c))
48
49#define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01)
50#define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2])
51#define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4])
52
53static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse)
54{
55 unsigned char *packet = psmouse->packet;
56 struct input_dev *dev = psmouse->dev;
57
58 if (psmouse->pktcnt != 5)
59 return PSMOUSE_GOOD_DATA;
60
61 input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet));
62 input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet));
63 input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet));
64 input_sync(dev);
65
66 return PSMOUSE_FULL_PACKET;
67}
68
Dmitry Torokhovb7802c52009-09-09 19:13:20 -070069int touchkit_ps2_detect(struct psmouse *psmouse, bool set_properties)
Stefan Lucke24bf10a2007-02-18 01:49:10 -050070{
71 struct input_dev *dev = psmouse->dev;
72 unsigned char param[3];
73 int command;
74
75 param[0] = TOUCHKIT_CMD_LENGTH;
76 param[1] = TOUCHKIT_CMD_ACTIVE;
77 command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD);
78
79 if (ps2_command(&psmouse->ps2dev, param, command))
80 return -ENODEV;
81
82 if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 ||
83 param[2] != TOUCHKIT_CMD_ACTIVE)
84 return -ENODEV;
85
86 if (set_properties) {
Jiri Slaby7b19ada2007-10-18 23:40:32 -070087 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
Dmitry Torokhov21f25572009-11-16 22:12:21 -080088 dev->keybit[BIT_WORD(BTN_MOUSE)] = 0;
89 dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
Stefan Lucke24bf10a2007-02-18 01:49:10 -050090 input_set_abs_params(dev, ABS_X, 0, TOUCHKIT_MAX_XC, 0, 0);
91 input_set_abs_params(dev, ABS_Y, 0, TOUCHKIT_MAX_YC, 0, 0);
92
93 psmouse->vendor = "eGalax";
94 psmouse->name = "Touchscreen";
95 psmouse->protocol_handler = touchkit_ps2_process_byte;
96 psmouse->pktsize = 5;
97 }
98
99 return 0;
100}