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Audio Client Interface (CIF) is a proprietary interface employed to route audio samples through Audio Hub (AHUB) components by inter connecting the various modules. This patch exports an inline function tegra_set_cif() which can be used, for now, to program CIF on Tegra210 and later Tegra generations. Later it can be extended to include helpers for legacy chips as well. Signed-off-by: Sameer Pujar <spujar@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/1595134890-16470-3-git-send-email-spujar@nvidia.com Signed-off-by: Mark Brown <broonie@kernel.org>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* tegra_cif.h - TEGRA Audio CIF Programming
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*
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* Copyright (c) 2020 NVIDIA CORPORATION. All rights reserved.
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*
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*/
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#ifndef __TEGRA_CIF_H__
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#define __TEGRA_CIF_H__
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#include <linux/regmap.h>
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#define TEGRA_ACIF_CTRL_FIFO_TH_SHIFT 24
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#define TEGRA_ACIF_CTRL_AUDIO_CH_SHIFT 20
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#define TEGRA_ACIF_CTRL_CLIENT_CH_SHIFT 16
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#define TEGRA_ACIF_CTRL_AUDIO_BITS_SHIFT 12
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#define TEGRA_ACIF_CTRL_CLIENT_BITS_SHIFT 8
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#define TEGRA_ACIF_CTRL_EXPAND_SHIFT 6
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#define TEGRA_ACIF_CTRL_STEREO_CONV_SHIFT 4
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#define TEGRA_ACIF_CTRL_REPLICATE_SHIFT 3
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#define TEGRA_ACIF_CTRL_TRUNCATE_SHIFT 1
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#define TEGRA_ACIF_CTRL_MONO_CONV_SHIFT 0
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/* AUDIO/CLIENT_BITS values */
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#define TEGRA_ACIF_BITS_8 1
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#define TEGRA_ACIF_BITS_16 3
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#define TEGRA_ACIF_BITS_24 5
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#define TEGRA_ACIF_BITS_32 7
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#define TEGRA_ACIF_UPDATE_MASK 0x3ffffffb
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struct tegra_cif_conf {
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unsigned int threshold;
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unsigned int audio_ch;
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unsigned int client_ch;
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unsigned int audio_bits;
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unsigned int client_bits;
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unsigned int expand;
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unsigned int stereo_conv;
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unsigned int replicate;
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unsigned int truncate;
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unsigned int mono_conv;
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};
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static inline void tegra_set_cif(struct regmap *regmap, unsigned int reg,
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struct tegra_cif_conf *conf)
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{
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unsigned int value;
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value = (conf->threshold << TEGRA_ACIF_CTRL_FIFO_TH_SHIFT) |
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((conf->audio_ch - 1) << TEGRA_ACIF_CTRL_AUDIO_CH_SHIFT) |
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((conf->client_ch - 1) << TEGRA_ACIF_CTRL_CLIENT_CH_SHIFT) |
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(conf->audio_bits << TEGRA_ACIF_CTRL_AUDIO_BITS_SHIFT) |
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(conf->client_bits << TEGRA_ACIF_CTRL_CLIENT_BITS_SHIFT) |
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(conf->expand << TEGRA_ACIF_CTRL_EXPAND_SHIFT) |
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(conf->stereo_conv << TEGRA_ACIF_CTRL_STEREO_CONV_SHIFT) |
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(conf->replicate << TEGRA_ACIF_CTRL_REPLICATE_SHIFT) |
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(conf->truncate << TEGRA_ACIF_CTRL_TRUNCATE_SHIFT) |
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(conf->mono_conv << TEGRA_ACIF_CTRL_MONO_CONV_SHIFT);
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regmap_update_bits(regmap, reg, TEGRA_ACIF_UPDATE_MASK, value);
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}
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#endif
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