Unverified Commit 1c3b89fb authored by Sameer Pujar's avatar Sameer Pujar Committed by Mark Brown
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ASoC: tegra: Add support for CIF programming 



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: default avatarSameer Pujar <spujar@nvidia.com>
Reviewed-by: default avatarJon Hunter <jonathanh@nvidia.com>
Reviewed-by: default avatarDmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/1595134890-16470-3-git-send-email-spujar@nvidia.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 665308c0

sound/soc/tegra/tegra_cif.h

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+65 −0
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/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * tegra_cif.h - TEGRA Audio CIF Programming

 *

 * Copyright (c) 2020 NVIDIA CORPORATION.  All rights reserved.

 *

 */



#ifndef __TEGRA_CIF_H__

#define __TEGRA_CIF_H__



#include <linux/regmap.h>



#define TEGRA_ACIF_CTRL_FIFO_TH_SHIFT		24

#define TEGRA_ACIF_CTRL_AUDIO_CH_SHIFT		20

#define TEGRA_ACIF_CTRL_CLIENT_CH_SHIFT		16

#define TEGRA_ACIF_CTRL_AUDIO_BITS_SHIFT	12

#define TEGRA_ACIF_CTRL_CLIENT_BITS_SHIFT	8

#define TEGRA_ACIF_CTRL_EXPAND_SHIFT		6

#define TEGRA_ACIF_CTRL_STEREO_CONV_SHIFT	4

#define TEGRA_ACIF_CTRL_REPLICATE_SHIFT		3

#define TEGRA_ACIF_CTRL_TRUNCATE_SHIFT		1

#define TEGRA_ACIF_CTRL_MONO_CONV_SHIFT		0



/* AUDIO/CLIENT_BITS values */

#define TEGRA_ACIF_BITS_8			1

#define TEGRA_ACIF_BITS_16			3

#define TEGRA_ACIF_BITS_24			5

#define TEGRA_ACIF_BITS_32			7



#define TEGRA_ACIF_UPDATE_MASK			0x3ffffffb



struct tegra_cif_conf {

	unsigned int threshold;

	unsigned int audio_ch;

	unsigned int client_ch;

	unsigned int audio_bits;

	unsigned int client_bits;

	unsigned int expand;

	unsigned int stereo_conv;

	unsigned int replicate;

	unsigned int truncate;

	unsigned int mono_conv;

};



static inline void tegra_set_cif(struct regmap *regmap, unsigned int reg,

				 struct tegra_cif_conf *conf)

{

	unsigned int value;



	value = (conf->threshold << TEGRA_ACIF_CTRL_FIFO_TH_SHIFT) |

		((conf->audio_ch - 1) << TEGRA_ACIF_CTRL_AUDIO_CH_SHIFT) |

		((conf->client_ch - 1) << TEGRA_ACIF_CTRL_CLIENT_CH_SHIFT) |

		(conf->audio_bits << TEGRA_ACIF_CTRL_AUDIO_BITS_SHIFT) |

		(conf->client_bits << TEGRA_ACIF_CTRL_CLIENT_BITS_SHIFT) |

		(conf->expand << TEGRA_ACIF_CTRL_EXPAND_SHIFT) |

		(conf->stereo_conv << TEGRA_ACIF_CTRL_STEREO_CONV_SHIFT) |

		(conf->replicate << TEGRA_ACIF_CTRL_REPLICATE_SHIFT) |

		(conf->truncate << TEGRA_ACIF_CTRL_TRUNCATE_SHIFT) |

		(conf->mono_conv << TEGRA_ACIF_CTRL_MONO_CONV_SHIFT);



	regmap_update_bits(regmap, reg, TEGRA_ACIF_UPDATE_MASK, value);

}



#endif