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Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
153 lines
3.7 KiB
C
153 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2012 Samsung Electronics
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* R. Chandrasekar < rcsekar@samsung.com>
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*/
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#ifndef __SOUND_H__
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#define __SOUND_H__
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/* sound codec enum */
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enum sound_compat {
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AUDIO_COMPAT_SPI,
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AUDIO_COMPAT_I2C,
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};
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/* Codec information structure to store the info from device tree */
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struct sound_codec_info {
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int i2c_bus;
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int i2c_dev_addr;
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};
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/**
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* struct sound_uc_priv - private uclass information about each sound device
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*
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* This is used to line the codec and i2s together
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*
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* @codec: Codec that is used for this sound device
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* @i2s: I2S bus that is used for this sound device
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* @setup_done: true if setup() has been called
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*/
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struct sound_uc_priv {
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struct udevice *codec;
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struct udevice *i2s;
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int setup_done;
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};
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/**
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* Generates square wave sound data for 1 second
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*
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* @sample_rate: Sample rate in Hz
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* @data: data buffer pointer
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* @size: size of the buffer in bytes
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* @freq: frequency of the wave
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* @channels: Number of channels to use
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*/
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void sound_create_square_wave(uint sample_rate, unsigned short *data, int size,
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uint freq, uint channels);
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/*
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* The sound uclass brings together a data transport (currently only I2C) and a
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* codec (currently connected over I2C).
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*/
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/* Operations for sound */
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struct sound_ops {
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/**
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* setup() - Set up to play a sound (optional)
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*/
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int (*setup)(struct udevice *dev);
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/**
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* play() - Play a beep
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*
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* @dev: Sound device
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* @data: Data buffer to play
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* @data_size: Size of data buffer in bytes
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* @return 0 if OK, -ve on error
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*/
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int (*play)(struct udevice *dev, void *data, uint data_size);
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/**
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* stop_play() - Indicate that there is no more data coming
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*
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* This is called once play() has finished sending all the data to the
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* output device. This may be used to tell the hardware to turn off the
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* codec, for example.
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*
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* @dev: Sound device
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* @return 0 if OK, -ve on error
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*/
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int (*stop_play)(struct udevice *dev);
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/**
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* start_beep() - Start beeping (optional)
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*
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* This tells the sound hardware to start a beep. It will continue until
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* stopped by sound_stop_beep().
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*
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* @dev: Sound device
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* @frequency_hz: Beep frequency in hertz
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* @return if OK, -ENOSYS if not supported, -ve on error
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*/
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int (*start_beep)(struct udevice *dev, int frequency_hz);
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/**
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* stop_beep() - Stop beeping (optional)
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*
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* This tells the sound hardware to stop a previously started beep.
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*
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* @dev: Sound device
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* @return if OK, -ve on error
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*/
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int (*stop_beep)(struct udevice *dev);
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};
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#define sound_get_ops(dev) ((struct sound_ops *)(dev)->driver->ops)
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/**
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* setup() - Set up to play a sound
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*/
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int sound_setup(struct udevice *dev);
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/**
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* play() - Play a beep
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*
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* @dev: Sound device
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* @msecs: Duration of beep in milliseconds
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* @frequency_hz: Frequency of the beep in Hertz
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* Return: 0 if OK, -ve on error
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*/
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int sound_beep(struct udevice *dev, int msecs, int frequency_hz);
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/**
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* sound_start_beep() - Start beeping
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*
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* This tells the sound hardware to start a beep. It will continue until stopped
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* by sound_stop_beep().
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*
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* @dev: Sound device
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* @frequency_hz: Beep frequency in hertz
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* Return: if OK, -ve on error
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*/
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int sound_start_beep(struct udevice *dev, int frequency_hz);
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/**
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* sound_stop_beep() - Stop beeping
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*
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* This tells the sound hardware to stop a previously started beep.
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*
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* @dev: Sound device
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* Return: if OK, -ve on error
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*/
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int sound_stop_beep(struct udevice *dev);
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/**
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* sound_find_codec_i2s() - Called by sound drivers to locate codec and i2s
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*
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* This finds the audio codec and i2s devices and puts them in the uclass's
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* private data for this device.
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*/
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int sound_find_codec_i2s(struct udevice *dev);
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#endif /* __SOUND__H__ */
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