include/sound.h

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