Input: constify psmouse driver
[linux-2.6.git] / drivers / input / mouse / lifebook.c
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, struct pt_regs *regs)
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         input_regs(dev, regs);
74
75         /* calculate X and Y */
76         if ((packet[0] & 0x08) == 0x00) {
77                 input_report_abs(dev, ABS_X,
78                                  (packet[1] | ((packet[0] & 0x30) << 4)));
79                 input_report_abs(dev, ABS_Y,
80                                  1024 - (packet[2] | ((packet[0] & 0xC0) << 2)));
81         } else {
82                 input_report_rel(dev, REL_X,
83                                 ((packet[0] & 0x10) ? packet[1] - 256 : packet[1]));
84                 input_report_rel(dev, REL_Y,
85                                  -(int)((packet[0] & 0x20) ? packet[2] - 256 : packet[2]));
86         }
87
88         input_report_key(dev, BTN_LEFT, packet[0] & 0x01);
89         input_report_key(dev, BTN_RIGHT, packet[0] & 0x02);
90         input_report_key(dev, BTN_TOUCH, packet[0] & 0x04);
91
92         input_sync(dev);
93
94         return PSMOUSE_FULL_PACKET;
95 }
96
97 static int lifebook_absolute_mode(struct psmouse *psmouse)
98 {
99         struct ps2dev *ps2dev = &psmouse->ps2dev;
100         unsigned char param;
101
102         if (psmouse_reset(psmouse))
103                 return -1;
104
105         /*
106            Enable absolute output -- ps2_command fails always but if
107            you leave this call out the touchsreen will never send
108            absolute coordinates
109         */
110         param = 0x07;
111         ps2_command(ps2dev, &param, PSMOUSE_CMD_SETRES);
112
113         return 0;
114 }
115
116 static void lifebook_set_resolution(struct psmouse *psmouse, unsigned int resolution)
117 {
118         static const unsigned char params[] = { 0, 1, 2, 2, 3 };
119         unsigned char p;
120
121         if (resolution == 0 || resolution > 400)
122                 resolution = 400;
123
124         p = params[resolution / 100];
125         ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
126         psmouse->resolution = 50 << p;
127 }
128
129 static void lifebook_disconnect(struct psmouse *psmouse)
130 {
131         psmouse_reset(psmouse);
132 }
133
134 int lifebook_detect(struct psmouse *psmouse, int set_properties)
135 {
136         if (!dmi_check_system(lifebook_dmi_table))
137                 return -1;
138
139         if (set_properties) {
140                 psmouse->vendor = "Fujitsu";
141                 psmouse->name = "Lifebook TouchScreen";
142         }
143
144         return 0;
145 }
146
147 int lifebook_init(struct psmouse *psmouse)
148 {
149         struct input_dev *input_dev = psmouse->dev;
150
151         if (lifebook_absolute_mode(psmouse))
152                 return -1;
153
154         input_dev->evbit[0] = BIT(EV_ABS) | BIT(EV_KEY) | BIT(EV_REL);
155         input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
156         input_dev->keybit[LONG(BTN_TOUCH)] = BIT(BTN_TOUCH);
157         input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
158         input_set_abs_params(input_dev, ABS_X, 0, 1024, 0, 0);
159         input_set_abs_params(input_dev, ABS_Y, 0, 1024, 0, 0);
160
161         psmouse->protocol_handler = lifebook_process_byte;
162         psmouse->set_resolution = lifebook_set_resolution;
163         psmouse->disconnect = lifebook_disconnect;
164         psmouse->reconnect  = lifebook_absolute_mode;
165         psmouse->pktsize = 3;
166
167         return 0;
168 }
169