linux/sound/soc/sh/rcar/ctu.c

// SPDX-License-Identifier: GPL-2.0
//
// ctu.c
//
// Copyright (c) 2015 Kuninori Morimoto <[email protected]>

#include "rsnd.h"

#define CTU_NAME_SIZE …
#define CTU_NAME …

/*
 * User needs to setup CTU by amixer, and its settings are
 * based on below registers
 *
 * CTUn_CPMDR : amixser set "CTU Pass"
 * CTUn_SV0xR : amixser set "CTU SV0"
 * CTUn_SV1xR : amixser set "CTU SV1"
 * CTUn_SV2xR : amixser set "CTU SV2"
 * CTUn_SV3xR : amixser set "CTU SV3"
 *
 * [CTU Pass]
 * 0000: default
 * 0001: Connect input data of channel 0
 * 0010: Connect input data of channel 1
 * 0011: Connect input data of channel 2
 * 0100: Connect input data of channel 3
 * 0101: Connect input data of channel 4
 * 0110: Connect input data of channel 5
 * 0111: Connect input data of channel 6
 * 1000: Connect input data of channel 7
 * 1001: Connect calculated data by scale values of matrix row 0
 * 1010: Connect calculated data by scale values of matrix row 1
 * 1011: Connect calculated data by scale values of matrix row 2
 * 1100: Connect calculated data by scale values of matrix row 3
 *
 * [CTU SVx]
 * [Output0] = [SV00, SV01, SV02, SV03, SV04, SV05, SV06, SV07]
 * [Output1] = [SV10, SV11, SV12, SV13, SV14, SV15, SV16, SV17]
 * [Output2] = [SV20, SV21, SV22, SV23, SV24, SV25, SV26, SV27]
 * [Output3] = [SV30, SV31, SV32, SV33, SV34, SV35, SV36, SV37]
 * [Output4] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
 * [Output5] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
 * [Output6] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
 * [Output7] = [ 0,   0,    0,    0,    0,    0,    0,    0   ]
 *
 * [SVxx]
 * Plus					Minus
 * value	time		dB	value		time		dB
 * -----------------------------------------------------------------------
 * H'7F_FFFF	2		6	H'80_0000	2		6
 * ...
 * H'40_0000	1		0	H'C0_0000	1		0
 * ...
 * H'00_0001	2.38 x 10^-7	-132
 * H'00_0000	0		Mute	H'FF_FFFF	2.38 x 10^-7	-132
 *
 *
 * Ex) Input ch -> Output ch
 *	1ch     ->  0ch
 *	0ch     ->  1ch
 *
 *	amixer set "CTU Reset" on
 *	amixer set "CTU Pass" 9,10
 *	amixer set "CTU SV0" 0,4194304
 *	amixer set "CTU SV1" 4194304,0
 * or
 *	amixer set "CTU Reset" on
 *	amixer set "CTU Pass" 2,1
 */

struct rsnd_ctu { … };

#define KCTRL_INITIALIZED …

#define rsnd_ctu_nr(priv) …
#define for_each_rsnd_ctu(pos, priv, i) …

#define rsnd_mod_to_ctu(_mod) …

#define rsnd_ctu_get(priv, id) …

static void rsnd_ctu_activation(struct rsnd_mod *mod)
{ … }

static void rsnd_ctu_halt(struct rsnd_mod *mod)
{ … }

static int rsnd_ctu_probe_(struct rsnd_mod *mod,
			   struct rsnd_dai_stream *io,
			   struct rsnd_priv *priv)
{ … }

static void rsnd_ctu_value_init(struct rsnd_dai_stream *io,
			       struct rsnd_mod *mod)
{ … }

static void rsnd_ctu_value_reset(struct rsnd_dai_stream *io,
				 struct rsnd_mod *mod)
{ … }

static int rsnd_ctu_init(struct rsnd_mod *mod,
			 struct rsnd_dai_stream *io,
			 struct rsnd_priv *priv)
{ … }

static int rsnd_ctu_quit(struct rsnd_mod *mod,
			 struct rsnd_dai_stream *io,
			 struct rsnd_priv *priv)
{ … }

static int rsnd_ctu_pcm_new(struct rsnd_mod *mod,
			    struct rsnd_dai_stream *io,
			    struct snd_soc_pcm_runtime *rtd)
{ … }

static int rsnd_ctu_id(struct rsnd_mod *mod)
{ … }

static int rsnd_ctu_id_sub(struct rsnd_mod *mod)
{ … }

#ifdef CONFIG_DEBUG_FS
static void rsnd_ctu_debug_info(struct seq_file *m,
				struct rsnd_dai_stream *io,
				struct rsnd_mod *mod)
{ … }
#define DEBUG_INFO …
#else
#define DEBUG_INFO
#endif

static struct rsnd_mod_ops rsnd_ctu_ops = …;

struct rsnd_mod *rsnd_ctu_mod_get(struct rsnd_priv *priv, int id)
{ … }

int rsnd_ctu_probe(struct rsnd_priv *priv)
{ … }

void rsnd_ctu_remove(struct rsnd_priv *priv)
{ … }