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
|
/*
* 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.
*
* h3600 atmel micro companion support, touchscreen subdevice
* Author : Alessandro Gardich <gremlin@gremlin.it>
* Author : Dmitry Artamonow <mad_soft@inbox.ru>
* Author : Linus Walleij <linus.walleij@linaro.org>
*
*/
#include <asm/byteorder.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pm.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/input.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mfd/ipaq-micro.h>
struct touchscreen_data {
struct input_dev *input;
struct ipaq_micro *micro;
};
static void micro_ts_receive(void *data, int len, unsigned char *msg)
{
struct touchscreen_data *ts = data;
if (len == 4) {
input_report_abs(ts->input, ABS_X,
be16_to_cpup((__be16 *) &msg[2]));
input_report_abs(ts->input, ABS_Y,
be16_to_cpup((__be16 *) &msg[0]));
input_report_key(ts->input, BTN_TOUCH, 1);
input_sync(ts->input);
} else if (len == 0) {
input_report_abs(ts->input, ABS_X, 0);
input_report_abs(ts->input, ABS_Y, 0);
input_report_key(ts->input, BTN_TOUCH, 0);
input_sync(ts->input);
}
}
static void micro_ts_toggle_receive(struct touchscreen_data *ts, bool enable)
{
struct ipaq_micro *micro = ts->micro;
spin_lock_irq(µ->lock);
if (enable) {
micro->ts = micro_ts_receive;
micro->ts_data = ts;
} else {
micro->ts = NULL;
micro->ts_data = NULL;
}
spin_unlock_irq(&ts->micro->lock);
}
static int micro_ts_open(struct input_dev *input)
{
struct touchscreen_data *ts = input_get_drvdata(input);
micro_ts_toggle_receive(ts, true);
return 0;
}
static void micro_ts_close(struct input_dev *input)
{
struct touchscreen_data *ts = input_get_drvdata(input);
micro_ts_toggle_receive(ts, false);
}
static int micro_ts_probe(struct platform_device *pdev)
{
struct ipaq_micro *micro = dev_get_drvdata(pdev->dev.parent);
struct touchscreen_data *ts;
int error;
ts = devm_kzalloc(&pdev->dev, sizeof(*ts), GFP_KERNEL);
if (!ts)
return -ENOMEM;
ts->micro = micro;
ts->input = devm_input_allocate_device(&pdev->dev);
if (!ts->input) {
dev_err(&pdev->dev, "failed to allocate input device\n");
return -ENOMEM;
}
ts->input->name = "ipaq micro ts";
ts->input->open = micro_ts_open;
ts->input->close = micro_ts_close;
input_set_drvdata(ts->input, ts);
input_set_capability(ts->input, EV_KEY, BTN_TOUCH);
input_set_capability(ts->input, EV_ABS, ABS_X);
input_set_capability(ts->input, EV_ABS, ABS_Y);
input_set_abs_params(ts->input, ABS_X, 0, 1023, 0, 0);
input_set_abs_params(ts->input, ABS_Y, 0, 1023, 0, 0);
error = input_register_device(ts->input);
if (error) {
dev_err(&pdev->dev, "error registering touch input\n");
return error;
}
platform_set_drvdata(pdev, ts);
dev_info(&pdev->dev, "iPAQ micro touchscreen\n");
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int micro_ts_suspend(struct device *dev)
{
struct touchscreen_data *ts = dev_get_drvdata(dev);
micro_ts_toggle_receive(ts, false);
return 0;
}
static int micro_ts_resume(struct device *dev)
{
struct touchscreen_data *ts = dev_get_drvdata(dev);
struct input_dev *input = ts->input;
mutex_lock(&input->mutex);
if (input->users)
micro_ts_toggle_receive(ts, true);
mutex_unlock(&input->mutex);
return 0;
}
#endif
static const struct dev_pm_ops micro_ts_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(micro_ts_suspend, micro_ts_resume)
};
static struct platform_driver micro_ts_device_driver = {
.driver = {
.name = "ipaq-micro-ts",
.pm = µ_ts_dev_pm_ops,
},
.probe = micro_ts_probe,
};
module_platform_driver(micro_ts_device_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("driver for iPAQ Atmel micro touchscreen");
MODULE_ALIAS("platform:ipaq-micro-ts");
|
