mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-10 07:04:28 +00:00
185f812c41
Sphinx expects Return: and not @return to indicate a return value.
find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;
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+ */
|
|
/*
|
|
* 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
|
|
*
|
|
* @sample_rate: Sample rate in Hz
|
|
* @data: data buffer pointer
|
|
* @size: size of the buffer in bytes
|
|
* @freq: frequency of the wave
|
|
* @channels: Number of channels to use
|
|
*/
|
|
void sound_create_square_wave(uint sample_rate, unsigned short *data, int size,
|
|
uint freq, uint channels);
|
|
|
|
/*
|
|
* 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 (optional)
|
|
*/
|
|
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);
|
|
|
|
/**
|
|
* stop_play() - Indicate that there is no more data coming
|
|
*
|
|
* This is called once play() has finished sending all the data to the
|
|
* output device. This may be used to tell the hardware to turn off the
|
|
* codec, for example.
|
|
*
|
|
* @dev: Sound device
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int (*stop_play)(struct udevice *dev);
|
|
|
|
/**
|
|
* start_beep() - Start beeping (optional)
|
|
*
|
|
* This tells the sound hardware to start a beep. It will continue until
|
|
* stopped by sound_stop_beep().
|
|
*
|
|
* @dev: Sound device
|
|
* @frequency_hz: Beep frequency in hertz
|
|
* @return if OK, -ENOSYS if not supported, -ve on error
|
|
*/
|
|
int (*start_beep)(struct udevice *dev, int frequency_hz);
|
|
|
|
/**
|
|
* stop_beep() - Stop beeping (optional)
|
|
*
|
|
* This tells the sound hardware to stop a previously started beep.
|
|
*
|
|
* @dev: Sound device
|
|
* @return if OK, -ve on error
|
|
*/
|
|
int (*stop_beep)(struct udevice *dev);
|
|
};
|
|
|
|
#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_start_beep() - Start beeping
|
|
*
|
|
* This tells the sound hardware to start a beep. It will continue until stopped
|
|
* by sound_stop_beep().
|
|
*
|
|
* @dev: Sound device
|
|
* @frequency_hz: Beep frequency in hertz
|
|
* Return: if OK, -ve on error
|
|
*/
|
|
int sound_start_beep(struct udevice *dev, int frequency_hz);
|
|
|
|
/**
|
|
* sound_stop_beep() - Stop beeping
|
|
*
|
|
* This tells the sound hardware to stop a previously started beep.
|
|
*
|
|
* @dev: Sound device
|
|
* Return: if OK, -ve on error
|
|
*/
|
|
int sound_stop_beep(struct udevice *dev);
|
|
|
|
/**
|
|
* 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);
|
|
|
|
#endif /* __SOUND__H__ */
|