blob: 2758928a5cb1e8264f1224d22fc9b3c8bd1655ea (
plain)
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
|
/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Barry Wardell
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
/* Taken from button-h10.c by Barry Wardell and reverse engineering by MrH. */
#include <stdlib.h>
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "button.h"
#include "kernel.h"
#include "backlight.h"
#include "system.h"
static unsigned int old_wheel_value = 0;
static unsigned int wheel_repeat = BUTTON_NONE;
/* Wheel backlight control */
#define WHEEL_BACKLIGHT_TIMEOUT 5*HZ;
static unsigned int wheel_backlight_timer;
void wheel_backlight_on(bool enable)
{
if(enable)
GPIOG_OUTPUT_VAL |=0x80;
else
GPIOG_OUTPUT_VAL &=~ 0x80;
}
void button_init_device(void)
{
/* Enable all buttons */
GPIOF_ENABLE |= 0xff;
GPIOH_ENABLE |= 0xc0;
/* Scrollwheel light - enable control through GPIOG pin 7 and set timeout */
GPIOG_ENABLE = 0x80;
GPIOG_OUTPUT_EN |= 0x80;
wheel_backlight_timer = WHEEL_BACKLIGHT_TIMEOUT;
/* Read initial wheel value (bit 6-7 of GPIOH) */
old_wheel_value = GPIOH_INPUT_VAL & 0xc0;
}
bool button_hold(void)
{
return (GPIOF_INPUT_VAL & 0x80)?true:false;
}
/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
int btn = BUTTON_NONE;
unsigned char state;
static bool hold_button = false;
bool hold_button_old;
unsigned int new_wheel_value = 0; /* read later, but this stops a warning */
/* Hold */
hold_button_old = hold_button;
hold_button = button_hold();
#if 0
#ifndef BOOTLOADER
/* light handling */
if (hold_button != hold_button_old)
{
backlight_hold_changed(hold_button);
}
#endif
#endif
/* device buttons */
if (!hold_button)
{
/* Read normal buttons */
state = GPIOF_INPUT_VAL & 0xff;
if ((state & 0x1) == 0) btn |= BUTTON_REC;
if ((state & 0x2) == 0) btn |= BUTTON_DOWN;
if ((state & 0x4) == 0) btn |= BUTTON_RIGHT;
if ((state & 0x8) == 0) btn |= BUTTON_LEFT;
if ((state & 0x10) == 0) btn |= BUTTON_SELECT; /* The centre button */
if ((state & 0x20) == 0) btn |= BUTTON_UP; /* The "play" button */
if ((state & 0x40) != 0) btn |= BUTTON_POWER;
/* Read wheel
* Bits 6 and 7 of GPIOH change as follows:
* Clockwise rotation 01 -> 00 -> 10 -> 11
* Counter-clockwise 11 -> 10 -> 00 -> 01
*
* This is equivalent to wheel_value of:
* Clockwise rotation 0x40 -> 0x00 -> 0x80 -> 0xc0
* Counter-clockwise 0xc0 -> 0x80 -> 0x00 -> 0x40
*/
new_wheel_value = GPIOH_INPUT_VAL & 0xc0;
switch(new_wheel_value){
case 0x00:
if(old_wheel_value==0x80)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0x40)
btn |= BUTTON_SCROLL_DOWN;
break;
case 0x40:
if(old_wheel_value==0x00)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0xc0)
btn |= BUTTON_SCROLL_DOWN;
break;
case 0x80:
if(old_wheel_value==0xc0)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0x00)
btn |= BUTTON_SCROLL_DOWN;
break;
case 0xc0:
if(old_wheel_value==0x40)
btn |= BUTTON_SCROLL_UP;
else if (old_wheel_value==0x80)
btn |= BUTTON_SCROLL_DOWN;
break;
}
if(wheel_repeat == BUTTON_NONE){
if(btn & BUTTON_SCROLL_UP)
wheel_repeat = BUTTON_SCROLL_UP;
if(btn & BUTTON_SCROLL_DOWN)
wheel_repeat = BUTTON_SCROLL_DOWN;
} else if (wheel_repeat == BUTTON_SCROLL_UP) {
btn |= BUTTON_SCROLL_UP;
wheel_repeat = BUTTON_NONE;
} else if (wheel_repeat == BUTTON_SCROLL_DOWN) {
btn |= BUTTON_SCROLL_DOWN;
wheel_repeat = BUTTON_NONE;
}
old_wheel_value = new_wheel_value;
}
if(wheel_backlight_timer>0){
wheel_backlight_timer--;
if(wheel_backlight_timer==0){
wheel_backlight_on(false);
}
}
if( (btn & BUTTON_SCROLL_UP) || (btn & BUTTON_SCROLL_DOWN) ){
/* only trigger once per click */
if ((new_wheel_value == 0x00) || (new_wheel_value == 0xc0))
{
btn = btn&(~(BUTTON_SCROLL_UP|BUTTON_SCROLL_DOWN));
}
if(wheel_backlight_timer==0){
wheel_backlight_on(true);
}
wheel_backlight_timer = WHEEL_BACKLIGHT_TIMEOUT;
}
return btn;
}
|
