include/sound.h

   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 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 sound_codec codec_type;
  29 };
  30
  31 /*
  32  * Generates square wave sound data for 1 second
  33  *
  34  * @param sample_rate   Sample rate in Hz
  35  * @param data          data buffer pointer
  36  * @param size          size of the buffer
  37  * @param freq          frequency of the wave
  38  */
  39 void sound_create_square_wave(uint sample_rate, unsigned short *data, int size,
  40                               uint freq);
  41
  42 /*
  43  * Initialises audio sub system
  44  * @param blob  Pointer of device tree node or NULL if none.
  45  * @return      int value 0 for success, -1 for error
  46  */
  47 int sound_init(const void *blob);
  48
  49 /*
  50  * plays the pcm data buffer in pcm_data.h through i2s1 to make the
  51  * sine wave sound
  52  *
  53  * @return      int 0 for success, -1 for error
  54  */
  55 int sound_play(uint32_t msec, uint32_t frequency);
  56
  57 #endif  /* __SOUND__H__ */