dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-08-31 16:22:36 +02:00
Code Issues Packages Projects Releases Wiki Activity

sound: Add support for Intel HDA

Browse Source 
The Intel High-definition Audio is a newer-generation audio system which
provides for transfer of a large number of audio stream, each containing
up to 16 channels.

Add support for HDA as a library which can be used by other drivers.
U-Boot currently uses only two channels (stereo).

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass
2019-02-16 20:24:55 -07:00
committed by Bin Meng
parent 2850266965
commit 2ca471379b
6 changed files with 738 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

103
include/hda_codec.h Normal file
View File

@@ -0,0 +1,103 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Support for Intel High-Definition Audio codec
*
* Copyright 2018 Google LLC
*
* Taken from coreboot file of the same name
*/
#ifndef __HDA_CODEC_H_
#define __HDA_CODEC_H_
struct hda_regs;
/**
* struct hda_codec_priv - Private data required by the HDA codec
*
* @regs: HDA registers
* @beep_nid: Node ID of beep node (>0)
*/
struct hda_codec_priv {
struct hda_regs *regs;
uint beep_nid;
};
/**
* hda_wait_for_ready() - Wait for the codec to indicate it is ready
*
* @regs: HDA registers
* @return 0 if OK -ETIMEDOUT if codec did not respond in time
*/
int hda_wait_for_ready(struct hda_regs *regs);
/**
* hda_wait_for_valid() - Wait for the codec to accept the last command
*
* @regs: HDA registers
* @return 0 if OK -ETIMEDOUT if codec did not respond in time
*/
int hda_wait_for_valid(struct hda_regs *regs);
/**
* hda_codec_detect() - Detect which codecs are present
*
* @regs: HDA registers
* @return bit mask of active codecs (0 if none)
* @return 0 if OK, -ve on error
*/
int hda_codec_detect(struct hda_regs *regs);
/**
* hda_codecs_init() - Init all codecs
*
* @dev: Sound device
* @regs: HDA registers
* @codec_mask: Mask of codecs to init (bits 3:0)
* @return 0 if OK, -ve on error
*/
int hda_codecs_init(struct udevice *dev, struct hda_regs *regs, u32 codec_mask);
/**
* hda_codec_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 hda_codec_start_beep(struct udevice *dev, int frequency_hz);
/**
* hda_codec_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 hda_codec_stop_beep(struct udevice *dev);
/**
* hda_codec_init() - Set up the HDA codec base address
*
* This should be called at the start of the probe() method.
*
* @dev: Sound device
* @return 0 if OK, -ve on error
*/
int hda_codec_init(struct udevice *dev);
/**
* hda_codec_finish_init() - Finish setting up the HDA codec base address
*
* This should be called at the end of the probe() method.
*
* @dev: Sound device
* @return 0 if OK, -ve on error
*/
int hda_codec_finish_init(struct udevice *dev);
#endif /* __HDA_CODEC_H_ */