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
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*
* Keyboard driver for the AAED-2000 dev board
*
* Copyright (c) 2006 Nicolas Bellido Y Ortega
*
* Based on corgikbd.c
*
* 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.
*
*/
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/init.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <asm/arch/hardware.h>
#include <asm/arch/aaed2000.h>
#define KB_ROWS 12
#define KB_COLS 8
#define KB_ROWMASK(r) (1 << (r))
#define SCANCODE(r,c) (((c) * KB_ROWS) + (r))
#define NR_SCANCODES (KB_COLS * KB_ROWS)
#define SCAN_INTERVAL (50) /* ms */
#define KB_ACTIVATE_DELAY (20) /* us */
static unsigned char aaedkbd_keycode[NR_SCANCODES] = {
KEY_9, KEY_0, KEY_MINUS, KEY_EQUAL, KEY_BACKSPACE, 0, KEY_SPACE, KEY_KP6, 0, KEY_KPDOT, 0, 0,
KEY_K, KEY_M, KEY_O, KEY_DOT, KEY_SLASH, 0, KEY_F, 0, 0, 0, KEY_LEFTSHIFT, 0,
KEY_I, KEY_P, KEY_LEFTBRACE, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, 0, 0, 0, 0, KEY_RIGHTSHIFT, 0,
KEY_8, KEY_L, KEY_SEMICOLON, KEY_APOSTROPHE, KEY_ENTER, 0, 0, 0, 0, 0, 0, 0,
KEY_J, KEY_H, KEY_B, KEY_KP8, KEY_KP4, 0, KEY_C, KEY_D, KEY_S, KEY_A, 0, KEY_CAPSLOCK,
KEY_Y, KEY_U, KEY_N, KEY_T, 0, 0, KEY_R, KEY_E, KEY_W, KEY_Q, 0, KEY_TAB,
KEY_7, KEY_6, KEY_G, 0, KEY_5, 0, KEY_4, KEY_3, KEY_2, KEY_1, 0, KEY_GRAVE,
0, 0, KEY_COMMA, 0, KEY_KP2, 0, KEY_V, KEY_LEFTALT, KEY_X, KEY_Z, 0, KEY_LEFTCTRL
};
struct aaedkbd {
unsigned char keycode[ARRAY_SIZE(aaedkbd_keycode)];
struct input_dev *input;
struct work_struct workq;
int kbdscan_state[KB_COLS];
int kbdscan_count[KB_COLS];
};
#define KBDSCAN_STABLE_COUNT 2
static void aaedkbd_report_col(struct aaedkbd *aaedkbd,
unsigned int col, unsigned int rowd)
{
unsigned int scancode, pressed;
unsigned int row;
for (row = 0; row < KB_ROWS; row++) {
scancode = SCANCODE(row, col);
pressed = rowd & KB_ROWMASK(row);
input_report_key(aaedkbd->input, aaedkbd->keycode[scancode], pressed);
}
}
/* Scan the hardware keyboard and push any changes up through the input layer */
static void aaedkbd_work(void *data)
{
struct aaedkbd *aaedkbd = data;
unsigned int col, rowd;
col = 0;
do {
AAEC_GPIO_KSCAN = col + 8;
udelay(KB_ACTIVATE_DELAY);
rowd = AAED_EXT_GPIO & AAED_EGPIO_KBD_SCAN;
if (rowd != aaedkbd->kbdscan_state[col]) {
aaedkbd->kbdscan_count[col] = 0;
aaedkbd->kbdscan_state[col] = rowd;
} else if (++aaedkbd->kbdscan_count[col] >= KBDSCAN_STABLE_COUNT) {
aaedkbd_report_col(aaedkbd, col, rowd);
col++;
}
} while (col < KB_COLS);
AAEC_GPIO_KSCAN = 0x07;
input_sync(aaedkbd->input);
schedule_delayed_work(&aaedkbd->workq, msecs_to_jiffies(SCAN_INTERVAL));
}
static int aaedkbd_open(struct input_dev *indev)
{
struct aaedkbd *aaedkbd = input_get_drvdata(indev);
schedule_delayed_work(&aaedkbd->workq, msecs_to_jiffies(SCAN_INTERVAL));
return 0;
}
static void aaedkbd_close(struct input_dev *indev)
{
struct aaedkbd *aaedkbd = input_get_drvdata(indev);
cancel_delayed_work(&aaedkbd->workq);
flush_scheduled_work();
}
static int __devinit aaedkbd_probe(struct platform_device *pdev)
{
struct aaedkbd *aaedkbd;
struct input_dev *input_dev;
int i;
int error;
aaedkbd = kzalloc(sizeof(struct aaedkbd), GFP_KERNEL);
input_dev = input_allocate_device();
if (!aaedkbd || !input_dev) {
error = -ENOMEM;
goto fail;
}
platform_set_drvdata(pdev, aaedkbd);
aaedkbd->input = input_dev;
/* Init keyboard rescan workqueue */
INIT_WORK(&aaedkbd->workq, aaedkbd_work, aaedkbd);
memcpy(aaedkbd->keycode, aaedkbd_keycode, sizeof(aaedkbd->keycode));
input_dev->name = "AAED-2000 Keyboard";
input_dev->phys = "aaedkbd/input0";
input_dev->id.bustype = BUS_HOST;
input_dev->id.vendor = 0x0001;
input_dev->id.product = 0x0001;
input_dev->id.version = 0x0100;
input_dev->dev.parent = &pdev->dev;
input_set_drvdata(input_dev, aaedkbd);
input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
input_dev->keycode = aaedkbd->keycode;
input_dev->keycodesize = sizeof(unsigned char);
input_dev->keycodemax = ARRAY_SIZE(aaedkbd_keycode);
for (i = 0; i < ARRAY_SIZE(aaedkbd_keycode); i++)
set_bit(aaedkbd->keycode[i], input_dev->keybit);
clear_bit(0, input_dev->keybit);
input_dev->open = aaedkbd_open;
input_dev->close = aaedkbd_close;
error = input_register_device(aaedkbd->input);
if (error)
goto fail;
return 0;
fail: kfree(aaedkbd);
input_free_device(input_dev);
return error;
}
static int __devexit aaedkbd_remove(struct platform_device *pdev)
{
struct aaedkbd *aaedkbd = platform_get_drvdata(pdev);
input_unregister_device(aaedkbd->input);
kfree(aaedkbd);
return 0;
}
static struct platform_driver aaedkbd_driver = {
.probe = aaedkbd_probe,
.remove = __devexit_p(aaedkbd_remove),
.driver = {
.name = "aaed2000-keyboard",
},
};
static int __init aaedkbd_init(void)
{
return platform_driver_register(&aaedkbd_driver);
}
static void __exit aaedkbd_exit(void)
{
platform_driver_unregister(&aaedkbd_driver);
}
module_init(aaedkbd_init);
module_exit(aaedkbd_exit);
MODULE_AUTHOR("Nicolas Bellido Y Ortega");
MODULE_DESCRIPTION("AAED-2000 Keyboard Driver");
MODULE_LICENSE("GPLv2");
|
