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1/*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License version 2 as
4 * published by the Free Software Foundation.
5 *
6 * h3600 atmel micro companion support, key subdevice
7 * based on previous kernel 2.4 version
8 * Author : Alessandro Gardich <gremlin@gremlin.it>
9 * Author : Linus Walleij <linus.walleij@linaro.org>
10 *
11 */
12#include <linux/module.h>
13#include <linux/init.h>
14#include <linux/fs.h>
15#include <linux/interrupt.h>
16#include <linux/sched.h>
17#include <linux/pm.h>
18#include <linux/sysctl.h>
19#include <linux/proc_fs.h>
20#include <linux/delay.h>
21#include <linux/device.h>
22#include <linux/input.h>
23#include <linux/platform_device.h>
24#include <linux/mfd/ipaq-micro.h>
25
26struct ipaq_micro_keys {
27 struct ipaq_micro *micro;
28 struct input_dev *input;
29 u16 *codes;
30};
31
32static const u16 micro_keycodes[] = {
33 KEY_RECORD, /* 1: Record button */
34 KEY_CALENDAR, /* 2: Calendar */
35 KEY_ADDRESSBOOK, /* 3: Contacts (looks like Outlook) */
36 KEY_MAIL, /* 4: Envelope (Q on older iPAQs) */
37 KEY_HOMEPAGE, /* 5: Start (looks like swoopy arrow) */
38 KEY_UP, /* 6: Up */
39 KEY_RIGHT, /* 7: Right */
40 KEY_LEFT, /* 8: Left */
41 KEY_DOWN, /* 9: Down */
42};
43
44static void micro_key_receive(void *data, int len, unsigned char *msg)
45{
46 struct ipaq_micro_keys *keys = data;
47 int key, down;
48
49 down = 0x80 & msg[0];
50 key = 0x7f & msg[0];
51
52 if (key < ARRAY_SIZE(micro_keycodes)) {
53 input_report_key(keys->input, keys->codes[key], down);
54 input_sync(keys->input);
55 }
56}
57
58static void micro_key_start(struct ipaq_micro_keys *keys)
59{
60 spin_lock(&keys->micro->lock);
61 keys->micro->key = micro_key_receive;
62 keys->micro->key_data = keys;
63 spin_unlock(&keys->micro->lock);
64}
65
66static void micro_key_stop(struct ipaq_micro_keys *keys)
67{
68 spin_lock(&keys->micro->lock);
69 keys->micro->key = NULL;
70 keys->micro->key_data = NULL;
71 spin_unlock(&keys->micro->lock);
72}
73
74static int micro_key_open(struct input_dev *input)
75{
76 struct ipaq_micro_keys *keys = input_get_drvdata(input);
77
78 micro_key_start(keys);
79
80 return 0;
81}
82
83static void micro_key_close(struct input_dev *input)
84{
85 struct ipaq_micro_keys *keys = input_get_drvdata(input);
86
87 micro_key_stop(keys);
88}
89
90static int micro_key_probe(struct platform_device *pdev)
91{
92 struct ipaq_micro_keys *keys;
93 int error;
94 int i;
95
96 keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
97 if (!keys)
98 return -ENOMEM;
99
100 keys->micro = dev_get_drvdata(pdev->dev.parent);
101
102 keys->input = devm_input_allocate_device(&pdev->dev);
103 if (!keys->input)
104 return -ENOMEM;
105
106 keys->input->keycodesize = sizeof(micro_keycodes[0]);
107 keys->input->keycodemax = ARRAY_SIZE(micro_keycodes);
108 keys->codes = devm_kmemdup(&pdev->dev, micro_keycodes,
109 keys->input->keycodesize * keys->input->keycodemax,
110 GFP_KERNEL);
111 keys->input->keycode = keys->codes;
112
113 __set_bit(EV_KEY, keys->input->evbit);
114 for (i = 0; i < ARRAY_SIZE(micro_keycodes); i++)
115 __set_bit(micro_keycodes[i], keys->input->keybit);
116
117 keys->input->name = "h3600 micro keys";
118 keys->input->open = micro_key_open;
119 keys->input->close = micro_key_close;
120 input_set_drvdata(keys->input, keys);
121
122 error = input_register_device(keys->input);
123 if (error)
124 return error;
125
126 platform_set_drvdata(pdev, keys);
127 return 0;
128}
129
130static int __maybe_unused micro_key_suspend(struct device *dev)
131{
132 struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
133
134 micro_key_stop(keys);
135
136 return 0;
137}
138
139static int __maybe_unused micro_key_resume(struct device *dev)
140{
141 struct ipaq_micro_keys *keys = dev_get_drvdata(dev);
142 struct input_dev *input = keys->input;
143
144 mutex_lock(&input->mutex);
145
146 if (input->users)
147 micro_key_start(keys);
148
149 mutex_unlock(&input->mutex);
150
151 return 0;
152}
153
154static SIMPLE_DEV_PM_OPS(micro_key_dev_pm_ops,
155 micro_key_suspend, micro_key_resume);
156
157static struct platform_driver micro_key_device_driver = {
158 .driver = {
159 .name = "ipaq-micro-keys",
160 .pm = &micro_key_dev_pm_ops,
161 },
162 .probe = micro_key_probe,
163};
164module_platform_driver(micro_key_device_driver);
165
166MODULE_LICENSE("GPL");
167MODULE_DESCRIPTION("driver for iPAQ Atmel micro keys");
168MODULE_ALIAS("platform:ipaq-micro-keys");
169

Warning: That file was not part of the compilation database. It may have many parsing errors.