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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 };
32
33
34 static psmouse_ret_t lifebook_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
35 {
36 unsigned char *packet = psmouse->packet;
37 struct input_dev *dev = &psmouse->dev;
38
39 if (psmouse->pktcnt != 3)
40 return PSMOUSE_GOOD_DATA;
41
42 input_regs(dev, regs);
43
44 /* calculate X and Y */
45 if ((packet[0] & 0x08) == 0x00) {
46 input_report_abs(dev, ABS_X,
47 (packet[1] | ((packet[0] & 0x30) << 4)));
48 input_report_abs(dev, ABS_Y,
49 1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
50 } else {
51 input_report_rel(dev, REL_X,
52 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
53 input_report_rel(dev, REL_Y,
54 -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
55 }
56
57 input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
58 input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
59 input_report_key(dev, BTN_TOUCH, packet[0] & 0x04);
60
61 input_sync(dev);
62
63 return PSMOUSE_FULL_PACKET;
64 }
65
66 static int lifebook_absolute_mode(struct psmouse *psmouse)
67 {
68 struct ps2dev *ps2dev = &psmouse->ps2dev;
69 unsigned char param;
70
71 if (psmouse_reset(psmouse))
72 return -1;
73
74 /*
75 Enable absolute output -- ps2_command fails always but if
76 you leave this call out the touchsreen will never send
77 absolute coordinates
78 */
79 param = 0x07;
80 ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
81
82 return 0;
83 }
84
85 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
86 {
87 unsigned char params[] = { 0, 1, 2, 2, 3 };
88
89 if (resolution == 0 || resolution > 400)
90 resolution = 400;
91
92 ps2_command(&psmouse->ps2dev, &params[resolution / 100], PSMOUSE_CMD_SETRES);
93 psmouse->resolution = 50 << params[resolution / 100];
94 }
95
96 static void lifebook_disconnect(struct psmouse *psmouse)
97 {
98 psmouse_reset(psmouse);
99 }
100
101 int lifebook_detect(struct psmouse *psmouse, int set_properties)
102 {
103 if (!dmi_check_system(lifebook_dmi_table))
104 return -1;
105
106 if (set_properties) {
107 psmouse->vendor = "Fujitsu";
108 psmouse->name = "Lifebook TouchScreen";
109 }
110
111 return 0;
112 }
113
114 int lifebook_init(struct psmouse *psmouse)
115 {
116 if (lifebook_absolute_mode(psmouse))
117 return -1;
118
119 psmouse->dev.evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL);
120 psmouse->dev.keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
121 psmouse->dev.keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
122 psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
123 input_set_abs_params(&psmouse->dev, ABS_X, 0, 1024, 0, 0);
124 input_set_abs_params(&psmouse->dev, ABS_Y, 0, 1024, 0, 0);
125
126 psmouse->protocol_handler = lifebook_process_byte;
127 psmouse->set_resolution = lifebook_set_resolution;
128 psmouse->disconnect = lifebook_disconnect;
129 psmouse->reconnect = lifebook_absolute_mode;
130 psmouse->pktsize = 3;
131
132 return 0;
133 }
134