diff options
Diffstat (limited to 'firmware/target/arm/as3525/sansa-clipzip/button-clipzip.c')
-rw-r--r-- | firmware/target/arm/as3525/sansa-clipzip/button-clipzip.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/firmware/target/arm/as3525/sansa-clipzip/button-clipzip.c b/firmware/target/arm/as3525/sansa-clipzip/button-clipzip.c new file mode 100644 index 0000000000..104c227378 --- /dev/null +++ b/firmware/target/arm/as3525/sansa-clipzip/button-clipzip.c | |||
@@ -0,0 +1,103 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2008 François Dinel | ||
11 | * Copyright © 2008-2009 Rafaël Carré | ||
12 | * | ||
13 | * This program is free software; you can redistribute it and/or | ||
14 | * modify it under the terms of the GNU General Public License | ||
15 | * as published by the Free Software Foundation; either version 2 | ||
16 | * of the License, or (at your option) any later version. | ||
17 | * | ||
18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
19 | * KIND, either express or implied. | ||
20 | * | ||
21 | ****************************************************************************/ | ||
22 | |||
23 | #include "config.h" | ||
24 | |||
25 | #include "button-target.h" | ||
26 | #include "as3525v2.h" | ||
27 | #include "kernel.h" | ||
28 | #include "system-target.h" | ||
29 | |||
30 | void button_init_device(void) | ||
31 | { | ||
32 | /* GPIO A6, A7 and D6 are direct button inputs */ | ||
33 | GPIOA_DIR &= ~(1 << 6); | ||
34 | GPIOA_DIR &= ~(1 << 7); | ||
35 | GPIOD_DIR &= ~(1 << 6); | ||
36 | |||
37 | /* GPIO C1, C2, C3, C4, C5 are used in a column/row key scan matrix */ | ||
38 | GPIOC_DIR |= ((1 << 1) | (1 << 2)); | ||
39 | GPIOC_DIR &= ~((1 << 3) | (1 << 4) | (1 << 5)); | ||
40 | } | ||
41 | |||
42 | /* TODO: | ||
43 | Instead of using udelay to wait for buttons to settle, we could use a | ||
44 | simple state machine to alternate between key matrix rows (like we do on | ||
45 | the clip) and this way avoid burning cycles in the udelay. | ||
46 | |||
47 | TODO: | ||
48 | Figure out the real mappings from GPIOs to buttons. | ||
49 | The current mapping is just an educated guess. | ||
50 | */ | ||
51 | int button_read_device(void) | ||
52 | { | ||
53 | int buttons = 0; | ||
54 | |||
55 | /* power */ | ||
56 | if (GPIOD_PIN(6)) { | ||
57 | buttons |= BUTTON_POWER; | ||
58 | } | ||
59 | |||
60 | /* volume */ | ||
61 | if (GPIOA_PIN(6)) { | ||
62 | buttons |= BUTTON_VOL_DOWN; | ||
63 | } | ||
64 | if (GPIOA_PIN(7)) { | ||
65 | buttons |= BUTTON_VOL_UP; | ||
66 | } | ||
67 | |||
68 | /* key matrix buttons, first row */ | ||
69 | GPIOC_PIN(1) = (1 << 1); | ||
70 | GPIOC_PIN(2) = 0; | ||
71 | udelay(500); | ||
72 | |||
73 | if (GPIOC_PIN(3)) { | ||
74 | buttons |= BUTTON_LEFT; | ||
75 | } | ||
76 | if (GPIOC_PIN(4)) { | ||
77 | buttons |= BUTTON_SELECT; | ||
78 | } | ||
79 | if (GPIOC_PIN(5)) { | ||
80 | buttons |= BUTTON_RIGHT; | ||
81 | } | ||
82 | |||
83 | /* key matrix buttons, second row */ | ||
84 | GPIOC_PIN(1) = 0; | ||
85 | GPIOC_PIN(2) = (1 << 2); | ||
86 | udelay(500); | ||
87 | |||
88 | if (GPIOC_PIN(3)) { | ||
89 | buttons |= BUTTON_UP; | ||
90 | } | ||
91 | if (GPIOC_PIN(4)) { | ||
92 | buttons |= BUTTON_HOME; | ||
93 | } | ||
94 | if (GPIOC_PIN(5)) { | ||
95 | buttons |= BUTTON_DOWN; | ||
96 | } | ||
97 | |||
98 | /* deselect scan rows */ | ||
99 | GPIOC_PIN(2) = 0; | ||
100 | |||
101 | return buttons; | ||
102 | } | ||
103 | |||