1 /* ----------------------------------------------------------------------------
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 *
24 * Vendor documentation is available in support section of:
25 * http://www.egalax.com.tw/
26 */
27
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
30
31 #include <linux/input.h>
32 #include <linux/serio.h>
33 #include <linux/libps2.h>
34
35 #include "psmouse.h"
36 #include "touchkit_ps2.h"
37
38 #define TOUCHKIT_MAX_XC 0x07ff
39 #define TOUCHKIT_MAX_YC 0x07ff
40
41 #define TOUCHKIT_CMD 0x0a
42 #define TOUCHKIT_CMD_LENGTH 1
43
44 #define TOUCHKIT_CMD_ACTIVE 'A'
45 #define TOUCHKIT_CMD_FIRMWARE_VERSION 'D'
46 #define TOUCHKIT_CMD_CONTROLLER_TYPE 'E'
47
48 #define TOUCHKIT_SEND_PARMS(s, r, c) ((s) << 12 | (r) << 8 | (c))
49
50 #define TOUCHKIT_GET_TOUCHED(packet) (((packet)[0]) & 0x01)
51 #define TOUCHKIT_GET_X(packet) (((packet)[1] << 7) | (packet)[2])
52 #define TOUCHKIT_GET_Y(packet) (((packet)[3] << 7) | (packet)[4])
53
54 static psmouse_ret_t touchkit_ps2_process_byte(struct psmouse *psmouse)
55 {
56 unsigned char *packet = psmouse->packet;
57 struct input_dev *dev = psmouse->dev;
58
59 if (psmouse->pktcnt != 5)
60 return PSMOUSE_GOOD_DATA;
61
62 input_report_abs(dev, ABS_X, TOUCHKIT_GET_X(packet));
63 input_report_abs(dev, ABS_Y, TOUCHKIT_GET_Y(packet));
64 input_report_key(dev, BTN_TOUCH, TOUCHKIT_GET_TOUCHED(packet));
65 input_sync(dev);
66
67 return PSMOUSE_FULL_PACKET;
68 }
69
70 int touchkit_ps2_detect(struct psmouse *psmouse, int set_properties)
71 {
72 struct input_dev *dev = psmouse->dev;
73 unsigned char param[3];
74 int command;
75
76 param[0] = TOUCHKIT_CMD_LENGTH;
77 param[1] = TOUCHKIT_CMD_ACTIVE;
78 command = TOUCHKIT_SEND_PARMS(2, 3, TOUCHKIT_CMD);
79
80 if (ps2_command(&psmouse->ps2dev, param, command))
81 return -ENODEV;
82
83 if (param[0] != TOUCHKIT_CMD || param[1] != 0x01 ||
84 param[2] != TOUCHKIT_CMD_ACTIVE)
85 return -ENODEV;
86
87 if (set_properties) {
88 dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
89 set_bit(BTN_TOUCH, dev->keybit);
90 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 }
101
|
This page was automatically generated by the
LXR engine.
|