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1 /*
2 * Fujitsu B-series Lifebook PS/2 TouchScreen driver
3 *
4 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
5 * Copyright (c) 2005 Kenan Esau <kenan.esau@conan.de>
6 *
7 * TouchScreen detection, absolute mode setting and packet layout is taken from
8 * Harald Hoyer's description of the device.
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 */
14
15 #include <linux/input.h>
16 #include <linux/serio.h>
17 #include <linux/libps2.h>
18 #include <linux/dmi.h>
19
20 #include "psmouse.h"
21 #include "lifebook.h"
22
23 static struct dmi_system_id lifebook_dmi_table[] = {
24 {
25 .ident = "LifeBook B",
26 .matches = {
27 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B Series"),
28 },
29 },
30 {
31 .ident = "Lifebook B",
32 .matches = {
33 DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK B Series"),
34 },
35 },
36 {
37 .ident = "Lifebook B213x/B2150",
38 .matches = {
39 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B2131/B2133/B2150"),
40 },
41 },
42 {
43 .ident = "Zephyr",
44 .matches = {
45 DMI_MATCH(DMI_PRODUCT_NAME, "ZEPHYR"),
46 },
47 },
48 {
49 .ident = "CF-18",
50 .matches = {
51 DMI_MATCH(DMI_PRODUCT_NAME, "CF-18"),
52 },
53 },
54 {
55 .ident = "Lifebook B142",
56 .matches = {
57 DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook B142"),
58 },
59
60 },
61 { }
62 };
63
64
65 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse)
66 {
67 unsigned char *packet = psmouse->packet;
68 struct input_dev *dev = psmouse->dev;
69
70 if (psmouse->pktcnt != 3)
71 return PSMOUSE_GOOD_DATA;
72
73 /* calculate X and Y */
74 if ((packet[0] & 0x08) == 0x00) {
75 input_report_abs(dev, ABS_X,
76 (packet[1] | ((packet[0] & 0x30) << 4)));
77 input_report_abs(dev, ABS_Y,
78 1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
79 } else {
80 input_report_rel(dev, REL_X,
81 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
82 input_report_rel(dev, REL_Y,
83 -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
84 }
85
86 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
87 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
88 input_report_key(dev, BTN_TOUCH, packet[0] & 0x04);
89
90 input_sync(dev);
91
92 return PSMOUSE_FULL_PACKET;
93 }
94
95 static int lifebook_absolute_mode(struct psmouse *psmouse)
96 {
97 struct ps2dev *ps2dev = &psmouse->ps2dev;
98 unsigned char param;
99
100 if (psmouse_reset(psmouse))
101 return -1;
102
103 /*
104 Enable absolute output -- ps2_command fails always but if
105 you leave this call out the touchsreen will never send
106 absolute coordinates
107 */
108 param = 0x07;
109 ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
110
111 return 0;
112 }
113
114 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
115 {
116 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
117 unsigned char p;
118
119 if (resolution == 0 || resolution > 400)
120 resolution = 400;
121
122 p = params[resolution / 100];
123 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
124 psmouse->resolution = 50 << p;
125 }
126
127 static void lifebook_disconnect(struct psmouse *psmouse)
128 {
129 psmouse_reset(psmouse);
130 }
131
132 int lifebook_detect(struct psmouse *psmouse, int set_properties)
133 {
134 if (!dmi_check_system(lifebook_dmi_table))
135 return -1;
136
137 if (set_properties) {
138 psmouse->vendor = "Fujitsu";
139 psmouse->name = "Lifebook TouchScreen";
140 }
141
142 return 0;
143 }
144
145 int lifebook_init(struct psmouse *psmouse)
146 {
147 struct input_dev *input_dev = psmouse->dev;
148
149 if (lifebook_absolute_mode(psmouse))
150 return -1;
151
152 input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL);
153 input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
154 input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
155 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
156 input_set_abs_params(input_dev, ABS_X, 0, 1024, 0, 0);
157 input_set_abs_params(input_dev, ABS_Y, 0, 1024, 0, 0);
158
159 psmouse->protocol_handler = lifebook_process_byte;
160 psmouse->set_resolution = lifebook_set_resolution;
161 psmouse->disconnect = lifebook_disconnect;
162 psmouse->reconnect = lifebook_absolute_mode;
163 psmouse->pktsize = 3;
164
165 return 0;
166 }
167