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authorSameer Pujar <spujar@nvidia.com>2020-07-19 10:31:21 +0530
committerMark Brown <broonie@kernel.org>2020-07-20 15:10:21 +0100
commit1c3b89fb7e4a78ddcd627e3f218a216e2136ae9b (patch)
tree2fa264ffc5e6ad20f532595228bb84087267b99b /sound/soc/tegra
parent665308c0b44a37339b9b3368f1dd61eb66acde87 (diff)
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: 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>
Diffstat (limited to 'sound/soc/tegra')
-rw-r--r--sound/soc/tegra/tegra_cif.h65
1 files changed, 65 insertions, 0 deletions
diff --git a/sound/soc/tegra/tegra_cif.h b/sound/soc/tegra/tegra_cif.h
new file mode 100644
index 000000000000..7cca8068f4b5
--- /dev/null
+++ b/sound/soc/tegra/tegra_cif.h
@@ -0,0 +1,65 @@
+/* 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