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gerrit.rockbox.org / rockbox / 611737bde8674d9ad45fd15caa26e035a1c76802 / . / firmware / target / coldfire / iaudio / m5 / button-m5.c
blob: 5d49bf1e350a140aeb1f0e679d39aa503d853b9e [file] [log] [blame]
Jens Arnold88760182007-03-05 00:04:00 +0000[diff] [blame]1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 * $Id$
9 *
10 * Copyright (C) 2006 by Linus Nielsen Feltzing
11 *
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
14 *
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
17 *
18 ****************************************************************************/
19#include "config.h"
20#include "system.h"
21#include "button.h"
22#include "backlight.h"
23#include "adc.h"
24#include "lcd-remote-target.h"
25
26/* have buttons scan by default */
27static bool button_scan_on = true;
28static bool hold_button = false;
29static bool remote_hold_button = false;
30
31void button_init_device(void)
32{
33 /* Power, Remote Play & Hold switch */
34 GPIO_FUNCTION |= 0x0e000000;
35 GPIO_ENABLE &= ~0x0e000000;
36}
37
38void button_enable_scan(bool enable)
39{
40 button_scan_on = enable;
41}
42
43bool button_scan_enabled(void)
44{
45 return button_scan_on;
46}
47
48bool button_hold(void)
49{
50 return (GPIO_READ & 0x08000000) == 0;
51}
52
53bool remote_button_hold(void)
54{
55 return remote_hold_button;
56}
57
58int button_read_device(void)
59{
60 int btn = BUTTON_NONE;
61 bool hold_button_old;
62 bool remote_hold_button_old;
Jens Arnold611737b2007-03-05 20:14:41 +0000[diff] [blame^]63 static int prev_data = 0xff;
64 static int last_valid = 0xff;
Jens Arnold88760182007-03-05 00:04:00 +0000[diff] [blame]65 int data;
66
67 /* normal buttons */
68 hold_button_old = hold_button;
69 hold_button = button_hold();
70
71#ifndef BOOTLOADER
72 /* give BL notice if HB state chaged */
73 if (hold_button != hold_button_old)
74 backlight_hold_changed(hold_button);
75#endif
76
77 if (button_scan_on && !hold_button)
78 {
79 data = adc_scan(ADC_BUTTONS);
80
Jens Arnold611737b2007-03-05 20:14:41 +0000[diff] [blame^]81 /* ADC debouncing: Only accept new reading if it's
82 * stable (+/-1). Use latest stable value otherwise. */
83 if ((unsigned)(data - prev_data + 1) <= 2)
84 last_valid = data;
85 prev_data = data;
86 data = last_valid;
87
Jens Arnold88760182007-03-05 00:04:00 +0000[diff] [blame]88 if (data < 0xf0)
89 {
90 if(data < 0x7c)
91 if(data < 0x42)
92 btn = BUTTON_LEFT;
93 else
94 if(data < 0x62)
95 btn = BUTTON_RIGHT;
96 else
97 btn = BUTTON_SELECT;
98 else
99 if(data < 0xb6)
100 if(data < 0x98)
101 btn = BUTTON_PLAY;
102 else
103 btn = BUTTON_REC;
104 else
105 if(data < 0xd3)
106 btn = BUTTON_DOWN;
107 else
108 btn = BUTTON_UP;
109 }
110 }
111
112 /* remote buttons */
113 data = remote_detect() ? adc_scan(ADC_REMOTE) : 0xff;
114
115 remote_hold_button_old = remote_hold_button;
116 remote_hold_button = data < 0x17;
117
118#ifndef BOOTLOADER
119 if (remote_hold_button != remote_hold_button_old)
120 remote_backlight_hold_changed(remote_hold_button);
121#endif
122
123 if (!remote_hold_button)
124 {
125 if (data < 0xee)
126 {
127 if(data < 0x7a)
128 if(data < 0x41)
129 btn |= BUTTON_RC_FF;
130 else
131 if(data < 0x61)
132 btn |= BUTTON_RC_REW;
133 else
134 btn |= BUTTON_RC_MODE;
135 else
136 if(data < 0xb4)
137 if(data < 0x96)
138 btn |= BUTTON_RC_REC;
139 else
140 btn |= BUTTON_RC_MENU;
141 else
142 if(data < 0xd1)
143 btn |= BUTTON_RC_VOL_UP;
144 else
145 btn |= BUTTON_RC_VOL_DOWN;
146 }
147 }
148
149 data = GPIO_READ;
150
151 /* hold and power are mutually exclusive */
152 if (!(data & 0x04000000))
153 btn |= BUTTON_POWER;
154
155 /* remote play button should be dead if hold */
156 if (!remote_hold_button && !(data & 0x02000000))
157 btn |= BUTTON_RC_PLAY;
158
159 return btn;
160}