mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 18:28:55 +00:00
f987177db9
At present the 'beep' sound generates a waveform for only one channel even
if two are being used. This means that the beep is twice the frequency it
should be. Correct this by making it a parameter.
The fix in a previous commit was correct for sandbox but not for other
boards.
Fixes: 03f11e87a8 ("sound: Correct data output in sound_create_square_wave()")
Signed-off-by: Simon Glass <sjg@chromium.org>
97 lines
2.2 KiB
C
97 lines
2.2 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
|
|
*/
|
|
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);
|
|
};
|
|
|
|
#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_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__ */
|