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 --- sound/soc/tegra/tegra_cif.h | 63 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 sound/soc/tegra/tegra_cif.h
diff --git a/sound/soc/tegra/tegra_cif.h b/sound/soc/tegra/tegra_cif.h new file mode 100644 index 0000000..ecc0850 --- /dev/null +++ b/sound/soc/tegra/tegra_cif.h @@ -0,0 +1,63 @@ +/* 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__ + +#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