dynapro.c
4.5 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
/*
* Dynapro serial touchscreen driver
*
* Copyright (c) 2009 Tias Guns
* Based on the inexio driver (c) Vojtech Pavlik and Dan Streetman and
* Richard Lemon
*
*/
/*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/
/*
* 2009/09/19 Tias Guns <tias@ulyssis.org>
* Copied inexio.c and edited for Dynapro protocol (from retired Xorg module)
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/input.h>
#include <linux/serio.h>
#define DRIVER_DESC "Dynapro serial touchscreen driver"
MODULE_AUTHOR("Tias Guns <tias@ulyssis.org>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
/*
* Definitions & global arrays.
*/
#define DYNAPRO_FORMAT_TOUCH_BIT 0x40
#define DYNAPRO_FORMAT_LENGTH 3
#define DYNAPRO_RESPONSE_BEGIN_BYTE 0x80
#define DYNAPRO_MIN_XC 0
#define DYNAPRO_MAX_XC 0x3ff
#define DYNAPRO_MIN_YC 0
#define DYNAPRO_MAX_YC 0x3ff
#define DYNAPRO_GET_XC(data) (data[1] | ((data[0] & 0x38) << 4))
#define DYNAPRO_GET_YC(data) (data[2] | ((data[0] & 0x07) << 7))
#define DYNAPRO_GET_TOUCHED(data) (DYNAPRO_FORMAT_TOUCH_BIT & data[0])
/*
* Per-touchscreen data.
*/
struct dynapro {
struct input_dev *dev;
struct serio *serio;
int idx;
unsigned char data[DYNAPRO_FORMAT_LENGTH];
char phys[32];
};
static void dynapro_process_data(struct dynapro *pdynapro)
{
struct input_dev *dev = pdynapro->dev;
if (DYNAPRO_FORMAT_LENGTH == ++pdynapro->idx) {
input_report_abs(dev, ABS_X, DYNAPRO_GET_XC(pdynapro->data));
input_report_abs(dev, ABS_Y, DYNAPRO_GET_YC(pdynapro->data));
input_report_key(dev, BTN_TOUCH,
DYNAPRO_GET_TOUCHED(pdynapro->data));
input_sync(dev);
pdynapro->idx = 0;
}
}
static irqreturn_t dynapro_interrupt(struct serio *serio,
unsigned char data, unsigned int flags)
{
struct dynapro *pdynapro = serio_get_drvdata(serio);
pdynapro->data[pdynapro->idx] = data;
if (DYNAPRO_RESPONSE_BEGIN_BYTE & pdynapro->data[0])
dynapro_process_data(pdynapro);
else
dev_dbg(&serio->dev, "unknown/unsynchronized data: %x\n",
pdynapro->data[0]);
return IRQ_HANDLED;
}
static void dynapro_disconnect(struct serio *serio)
{
struct dynapro *pdynapro = serio_get_drvdata(serio);
input_get_device(pdynapro->dev);
input_unregister_device(pdynapro->dev);
serio_close(serio);
serio_set_drvdata(serio, NULL);
input_put_device(pdynapro->dev);
kfree(pdynapro);
}
/*
* dynapro_connect() is the routine that is called when someone adds a
* new serio device that supports dynapro protocol and registers it as
* an input device. This is usually accomplished using inputattach.
*/
static int dynapro_connect(struct serio *serio, struct serio_driver *drv)
{
struct dynapro *pdynapro;
struct input_dev *input_dev;
int err;
pdynapro = kzalloc(sizeof(struct dynapro), GFP_KERNEL);
input_dev = input_allocate_device();
if (!pdynapro || !input_dev) {
err = -ENOMEM;
goto fail1;
}
pdynapro->serio = serio;
pdynapro->dev = input_dev;
snprintf(pdynapro->phys, sizeof(pdynapro->phys),
"%s/input0", serio->phys);
input_dev->name = "Dynapro Serial TouchScreen";
input_dev->phys = pdynapro->phys;
input_dev->id.bustype = BUS_RS232;
input_dev->id.vendor = SERIO_DYNAPRO;
input_dev->id.product = 0;
input_dev->id.version = 0x0001;
input_dev->dev.parent = &serio->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
input_set_abs_params(pdynapro->dev, ABS_X,
DYNAPRO_MIN_XC, DYNAPRO_MAX_XC, 0, 0);
input_set_abs_params(pdynapro->dev, ABS_Y,
DYNAPRO_MIN_YC, DYNAPRO_MAX_YC, 0, 0);
serio_set_drvdata(serio, pdynapro);
err = serio_open(serio, drv);
if (err)
goto fail2;
err = input_register_device(pdynapro->dev);
if (err)
goto fail3;
return 0;
fail3: serio_close(serio);
fail2: serio_set_drvdata(serio, NULL);
fail1: input_free_device(input_dev);
kfree(pdynapro);
return err;
}
/*
* The serio driver structure.
*/
static struct serio_device_id dynapro_serio_ids[] = {
{
.type = SERIO_RS232,
.proto = SERIO_DYNAPRO,
.id = SERIO_ANY,
.extra = SERIO_ANY,
},
{ 0 }
};
MODULE_DEVICE_TABLE(serio, dynapro_serio_ids);
static struct serio_driver dynapro_drv = {
.driver = {
.name = "dynapro",
},
.description = DRIVER_DESC,
.id_table = dynapro_serio_ids,
.interrupt = dynapro_interrupt,
.connect = dynapro_connect,
.disconnect = dynapro_disconnect,
};
module_serio_driver(dynapro_drv);