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
|
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2012 Samsung Electronics
* R. Chandrasekar < rcsekar@samsung.com>
*/
#ifndef __SOUND_H__
#define __SOUND_H__
/* sound codec enum */
enum sound_compat {
AUDIO_COMPAT_SPI,
AUDIO_COMPAT_I2C,
};
/* Codec information structure to store the info from device tree */
struct sound_codec_info {
int i2c_bus;
int i2c_dev_addr;
};
/**
* struct sound_uc_priv - private uclass information about each sound device
*
* This is used to line the codec and i2s together
*
* @codec: Codec that is used for this sound device
* @i2s: I2S bus that is used for this sound device
* @setup_done: true if setup() has been called
*/
struct sound_uc_priv {
struct udevice *codec;
struct udevice *i2s;
int setup_done;
};
/**
* Generates square wave sound data for 1 second
*
* @param sample_rate Sample rate in Hz
* @param data data buffer pointer
* @param size size of the buffer in bytes
* @param freq frequency of the wave
*/
void sound_create_square_wave(uint sample_rate, unsigned short *data, int size,
uint freq);
/*
* Initialises audio sub system
* @param blob Pointer of device tree node or NULL if none.
* @return int value 0 for success, -1 for error
*/
int sound_init(const void *blob);
#ifdef CONFIG_DM_SOUND
/*
* The sound uclass brings together a data transport (currently only I2C) and a
* codec (currently connected over I2C).
*/
/* Operations for sound */
struct sound_ops {
/**
* setup() - Set up to play a sound
*/
int (*setup)(struct udevice *dev);
/**
* play() - Play a beep
*
* @dev: Sound device
* @data: Data buffer to play
* @data_size: Size of data buffer in bytes
* @return 0 if OK, -ve on error
*/
int (*play)(struct udevice *dev, void *data, uint data_size);
};
#define sound_get_ops(dev) ((struct sound_ops *)(dev)->driver->ops)
/**
* setup() - Set up to play a sound
*/
int sound_setup(struct udevice *dev);
/**
* play() - Play a beep
*
* @dev: Sound device
* @msecs: Duration of beep in milliseconds
* @frequency_hz: Frequency of the beep in Hertz
* @return 0 if OK, -ve on error
*/
int sound_beep(struct udevice *dev, int msecs, int frequency_hz);
/**
* sound_find_codec_i2s() - Called by sound drivers to locate codec and i2s
*
* This finds the audio codec and i2s devices and puts them in the uclass's
* private data for this device.
*/
int sound_find_codec_i2s(struct udevice *dev);
#else
/*
* plays the pcm data buffer in pcm_data.h through i2s1 to make the
* sine wave sound
*
* @return int 0 for success, -1 for error
*/
int sound_play(uint32_t msec, uint32_t frequency);
#endif /* CONFIG_DM_SOUND */
#endif /* __SOUND__H__ */
|
