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https://github.com/AsahiLinux/u-boot
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2ca471379b
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>
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Intel HDA audio codec config. This is a mechanicm to configure codecs when
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* using Intel HDA audio.
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*
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* Copyright 2018 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __AZALIA_H
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#define __AZALIA_H
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#define AZALIA_CODEC_SHIFT 28
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#define AZALIA_NID_SHIFT 20
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#define AZALIA_VERB_SHIFT 8
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/* Supported opcodes */
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#define AZALIA_OPCODE_CONFIG_DEFAULT 0x71c
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#define AZALIA_OPCODE_IMPL_ID 0x720
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#define AZALIA_OPCODE_READ_PARAM 0xf00
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#define AZALIA_PARAM_VENDOR_ID 0
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/* Generate the register value to write a particular byte of a 32-bit value */
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#define AZALIA_SET_BYTE(codec, nid, opcode, val, byte) \
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((codec) << AZALIA_CODEC_SHIFT | \
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(nid) << AZALIA_NID_SHIFT | \
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((opcode) + (byte)) << AZALIA_VERB_SHIFT | \
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(((val) >> ((byte) * 8)) & 0xff))
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/* Generate the register value to write all bytes of a 32-bit value */
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#define AZALIA_WORD(codec, nid, opcode, val) \
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(AZALIA_SET_BYTE(codec, nid, opcode, val, 0) | \
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AZALIA_SET_BYTE(codec, nid, opcode, val, 1) | \
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AZALIA_SET_BYTE(codec, nid, opcode, val, 2) | \
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AZALIA_SET_BYTE(codec, nid, opcode, val, 3))
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#define AZALIA_PIN_CFG(codec, nid, val) \
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AZALIA_WORD(codec, nid, AZALIA_OPCODE_CONFIG_DEFAULT, val)
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#define AZALIA_SUBVENDOR(codec, val) \
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AZALIA_WORD(codec, 1, AZALIA_OPCODE_IMPL_ID, val)
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#endif /* __AZALIA_H */
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