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1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * Copyright (C) 2012 Samsung Electronics
4  * R. Chandrasekar < rcsekar@samsung.com>
5  */
6 
7 #ifndef __SOUND_H__
8 #define __SOUND_H__
9 
10 /* sound codec enum */
11 enum en_sound_codec {
12 	CODEC_WM_8994,
13 	CODEC_WM_8995,
14 	CODEC_MAX_98095,
15 	CODEC_MAX
16 };
17 
18 /* sound codec enum */
19 enum sound_compat {
20 	AUDIO_COMPAT_SPI,
21 	AUDIO_COMPAT_I2C,
22 };
23 
24 /* Codec information structure to store the info from device tree */
25 struct sound_codec_info {
26 	int i2c_bus;
27 	int i2c_dev_addr;
28 	enum en_sound_codec codec_type;
29 };
30 
31 /*
32  * Generates square wave sound data for 1 second
33  *
34  * @param data          data buffer pointer
35  * @param size          size of the buffer
36  * @param freq          frequency of the wave
37  */
38 void sound_create_square_wave(unsigned short *data, int size, uint32_t freq);
39 
40 /*
41  * Initialises audio sub system
42  * @param blob	Pointer of device tree node or NULL if none.
43  * @return	int value 0 for success, -1 for error
44  */
45 int sound_init(const void *blob);
46 
47 /*
48  * plays the pcm data buffer in pcm_data.h through i2s1 to make the
49  * sine wave sound
50  *
51  * @return	int 0 for success, -1 for error
52  */
53 int sound_play(uint32_t msec, uint32_t frequency);
54 
55 #endif  /* __SOUND__H__ */
56