core.c 29.2 KB
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/*
 * Renesas R-Car SRU/SCU/SSIU/SSI support
 *
 * Copyright (C) 2013 Renesas Solutions Corp.
 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 *
 * Based on fsi.c
 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

/*
 * Renesas R-Car sound device structure
 *
 * Gen1
 *
 * SRU		: Sound Routing Unit
 *  - SRC	: Sampling Rate Converter
 *  - CMD
 *    - CTU	: Channel Count Conversion Unit
 *    - MIX	: Mixer
 *    - DVC	: Digital Volume and Mute Function
 *  - SSI	: Serial Sound Interface
 *
 * Gen2
 *
 * SCU		: Sampling Rate Converter Unit
 *  - SRC	: Sampling Rate Converter
 *  - CMD
 *   - CTU	: Channel Count Conversion Unit
 *   - MIX	: Mixer
 *   - DVC	: Digital Volume and Mute Function
 * SSIU		: Serial Sound Interface Unit
 *  - SSI	: Serial Sound Interface
 */

/*
 *	driver data Image
 *
 * rsnd_priv
 *   |
 *   | ** this depends on Gen1/Gen2
 *   |
 *   +- gen
 *   |
 *   | ** these depend on data path
 *   | ** gen and platform data control it
 *   |
 *   +- rdai[0]
 *   |   |		 sru     ssiu      ssi
 *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 *   |   |
 *   |   |		 sru     ssiu      ssi
 *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 *   |
 *   +- rdai[1]
 *   |   |		 sru     ssiu      ssi
 *   |   +- playback -> [mod] -> [mod] -> [mod] -> ...
 *   |   |
 *   |   |		 sru     ssiu      ssi
 *   |   +- capture  -> [mod] -> [mod] -> [mod] -> ...
 *   ...
 *   |
 *   | ** these control ssi
 *   |
 *   +- ssi
 *   |  |
 *   |  +- ssi[0]
 *   |  +- ssi[1]
 *   |  +- ssi[2]
 *   |  ...
 *   |
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 *   | ** these control src
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 *   |
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 *   +- src
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 *      |
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 *      +- src[0]
 *      +- src[1]
 *      +- src[2]
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 *      ...
 *
 *
 * for_each_rsnd_dai(xx, priv, xx)
 *  rdai[0] => rdai[1] => rdai[2] => ...
 *
 * for_each_rsnd_mod(xx, rdai, xx)
 *  [mod] => [mod] => [mod] => ...
 *
 * rsnd_dai_call(xxx, fn )
 *  [mod]->fn() -> [mod]->fn() -> [mod]->fn()...
 *
 */
#include <linux/pm_runtime.h>
#include "rsnd.h"

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#define RSND_RATES SNDRV_PCM_RATE_8000_192000
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#define RSND_FMTS (SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S16_LE)

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static const struct of_device_id rsnd_of_match[] = {
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	{ .compatible = "renesas,rcar_sound-gen1", .data = (void *)RSND_GEN1 },
	{ .compatible = "renesas,rcar_sound-gen2", .data = (void *)RSND_GEN2 },
	{ .compatible = "renesas,rcar_sound-gen3", .data = (void *)RSND_GEN2 }, /* gen2 compatible */
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	{},
};
MODULE_DEVICE_TABLE(of, rsnd_of_match);

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/*
 *	rsnd_mod functions
 */
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void rsnd_mod_make_sure(struct rsnd_mod *mod, enum rsnd_mod_type type)
{
	if (mod->type != type) {
		struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
		struct device *dev = rsnd_priv_to_dev(priv);

		dev_warn(dev, "%s[%d] is not your expected module\n",
			 rsnd_mod_name(mod), rsnd_mod_id(mod));
	}
}

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char *rsnd_mod_name(struct rsnd_mod *mod)
{
	if (!mod || !mod->ops)
		return "unknown";

	return mod->ops->name;
}

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struct dma_chan *rsnd_mod_dma_req(struct rsnd_dai_stream *io,
				  struct rsnd_mod *mod)
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{
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	if (!mod || !mod->ops || !mod->ops->dma_req)
		return NULL;
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	return mod->ops->dma_req(io, mod);
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}

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u32 *rsnd_mod_get_status(struct rsnd_dai_stream *io,
			 struct rsnd_mod *mod,
			 enum rsnd_mod_type type)
{
	return &mod->status;
}

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int rsnd_mod_init(struct rsnd_priv *priv,
		  struct rsnd_mod *mod,
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		  struct rsnd_mod_ops *ops,
		  struct clk *clk,
		  u32* (*get_status)(struct rsnd_dai_stream *io,
				     struct rsnd_mod *mod,
				     enum rsnd_mod_type type),
		  enum rsnd_mod_type type,
		  int id)
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{
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	int ret = clk_prepare(clk);

	if (ret)
		return ret;

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	mod->id		= id;
	mod->ops	= ops;
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	mod->type	= type;
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	mod->clk	= clk;
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	mod->priv	= priv;
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	mod->get_status	= get_status;
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	return ret;
}

void rsnd_mod_quit(struct rsnd_mod *mod)
{
	if (mod->clk)
		clk_unprepare(mod->clk);
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	mod->clk = NULL;
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}

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void rsnd_mod_interrupt(struct rsnd_mod *mod,
			void (*callback)(struct rsnd_mod *mod,
					 struct rsnd_dai_stream *io))
{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct rsnd_dai_stream *io;
	struct rsnd_dai *rdai;
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	int i;
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	for_each_rsnd_dai(rdai, priv, i) {
		io = &rdai->playback;
		if (mod == io->mod[mod->type])
			callback(mod, io);
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		io = &rdai->capture;
		if (mod == io->mod[mod->type])
			callback(mod, io);
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	}
}

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int rsnd_io_is_working(struct rsnd_dai_stream *io)
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{
	/* see rsnd_dai_stream_init/quit() */
	return !!io->substream;
}

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void rsnd_set_slot(struct rsnd_dai *rdai,
		   int slots, int num)
{
	rdai->slots	= slots;
	rdai->slots_num	= num;
}

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int rsnd_get_slot(struct rsnd_dai_stream *io)
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{
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	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);

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	return rdai->slots;
}

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int rsnd_get_slot_num(struct rsnd_dai_stream *io)
{
	struct rsnd_dai *rdai = rsnd_io_to_rdai(io);

	return rdai->slots_num;
}

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int rsnd_runtime_channel_original(struct rsnd_dai_stream *io)
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{
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	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
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	return runtime->channels;
}

int rsnd_runtime_channel_after_ctu(struct rsnd_dai_stream *io)
{
	int chan = rsnd_runtime_channel_original(io);
	struct rsnd_mod *ctu_mod = rsnd_io_to_mod_ctu(io);

	if (ctu_mod) {
		u32 converted_chan = rsnd_ctu_converted_channel(ctu_mod);

		if (converted_chan)
			return converted_chan;
	}

	return chan;
}

int rsnd_runtime_channel_for_ssi(struct rsnd_dai_stream *io)
{
	int chan = rsnd_io_is_play(io) ?
		rsnd_runtime_channel_after_ctu(io) :
		rsnd_runtime_channel_original(io);

	/* Use Multi SSI */
	if (rsnd_runtime_is_ssi_multi(io))
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		chan /= rsnd_get_slot_num(io);
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	/* TDM Extend Mode needs 8ch */
	if (chan == 6)
		chan = 8;

	return chan;
}

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int rsnd_runtime_is_ssi_multi(struct rsnd_dai_stream *io)
{
	int slots = rsnd_get_slot_num(io);
	int chan = rsnd_io_is_play(io) ?
		rsnd_runtime_channel_after_ctu(io) :
		rsnd_runtime_channel_original(io);

	return (chan >= 6) && (slots > 1);
}

int rsnd_runtime_is_ssi_tdm(struct rsnd_dai_stream *io)
{
	return rsnd_runtime_channel_for_ssi(io) >= 6;
}

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/*
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 *	ADINR function
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 */
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u32 rsnd_get_adinr_bit(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
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{
	struct rsnd_priv *priv = rsnd_mod_to_priv(mod);
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	struct device *dev = rsnd_priv_to_dev(priv);

	switch (runtime->sample_bits) {
	case 16:
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		return 8 << 16;
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	case 32:
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		return 0 << 16;
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	}

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	dev_warn(dev, "not supported sample bits\n");

	return 0;
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}

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/*
 *	DALIGN function
 */
u32 rsnd_get_dalign(struct rsnd_mod *mod, struct rsnd_dai_stream *io)
{
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	struct rsnd_mod *ssiu = rsnd_io_to_mod_ssiu(io);
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	struct rsnd_mod *target;
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	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	u32 val = 0x76543210;
	u32 mask = ~0;

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	if (rsnd_io_is_play(io)) {
		struct rsnd_mod *src = rsnd_io_to_mod_src(io);

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		target = src ? src : ssiu;
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	} else {
		struct rsnd_mod *cmd = rsnd_io_to_mod_cmd(io);

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		target = cmd ? cmd : ssiu;
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	}

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	mask <<= runtime->channels * 4;
	val = val & mask;

	switch (runtime->sample_bits) {
	case 16:
		val |= 0x67452301 & ~mask;
		break;
	case 32:
		val |= 0x76543210 & ~mask;
		break;
	}

	/*
	 * exchange channeles on SRC if possible,
	 * otherwise, R/L volume settings on DVC
	 * changes inverted channels
	 */
	if (mod == target)
		return val;
	else
		return 0x76543210;
}

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u32 rsnd_get_busif_shift(struct rsnd_dai_stream *io, struct rsnd_mod *mod)
{
	enum rsnd_mod_type playback_mods[] = {
		RSND_MOD_SRC,
		RSND_MOD_CMD,
		RSND_MOD_SSIU,
	};
	enum rsnd_mod_type capture_mods[] = {
		RSND_MOD_CMD,
		RSND_MOD_SRC,
		RSND_MOD_SSIU,
	};
	struct snd_pcm_runtime *runtime = rsnd_io_to_runtime(io);
	struct rsnd_mod *tmod = NULL;
	enum rsnd_mod_type *mods =
		rsnd_io_is_play(io) ?
		playback_mods : capture_mods;
	int i;

	/*
	 * This is needed for 24bit data
	 * We need to shift 8bit
	 *
	 * Linux 24bit data is located as 0x00******
	 * HW    24bit data is located as 0x******00
	 *
	 */
	switch (runtime->sample_bits) {
	case 16:
		return 0;
	case 32:
		break;
	}

	for (i = 0; i < ARRAY_SIZE(playback_mods); i++) {
		tmod = rsnd_io_to_mod(io, mods[i]);
		if (tmod)
			break;
	}

	if (tmod != mod)
		return 0;

	if (rsnd_io_is_play(io))
		return  (0 << 20) | /* shift to Left */
			(8 << 16);  /* 8bit */
	else
		return  (1 << 20) | /* shift to Right */
			(8 << 16);  /* 8bit */
}

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/*
 *	rsnd_dai functions
 */
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struct rsnd_mod *rsnd_mod_next(int *iterator,
			       struct rsnd_dai_stream *io,
			       enum rsnd_mod_type *array,
			       int array_size)
{
	struct rsnd_mod *mod;
	enum rsnd_mod_type type;
	int max = array ? array_size : RSND_MOD_MAX;

	for (; *iterator < max; (*iterator)++) {
		type = (array) ? array[*iterator] : *iterator;
		mod = io->mod[type];
		if (!mod)
			continue;

		return mod;
	}

	return NULL;
}

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static enum rsnd_mod_type rsnd_mod_sequence[][RSND_MOD_MAX] = {
	{
		/* CAPTURE */
		RSND_MOD_AUDMAPP,
		RSND_MOD_AUDMA,
		RSND_MOD_DVC,
		RSND_MOD_MIX,
		RSND_MOD_CTU,
		RSND_MOD_CMD,
		RSND_MOD_SRC,
		RSND_MOD_SSIU,
		RSND_MOD_SSIM3,
		RSND_MOD_SSIM2,
		RSND_MOD_SSIM1,
		RSND_MOD_SSIP,
		RSND_MOD_SSI,
	}, {
		/* PLAYBACK */
		RSND_MOD_AUDMAPP,
		RSND_MOD_AUDMA,
		RSND_MOD_SSIM3,
		RSND_MOD_SSIM2,
		RSND_MOD_SSIM1,
		RSND_MOD_SSIP,
		RSND_MOD_SSI,
		RSND_MOD_SSIU,
		RSND_MOD_DVC,
		RSND_MOD_MIX,
		RSND_MOD_CTU,
		RSND_MOD_CMD,
		RSND_MOD_SRC,
	},
};

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static int rsnd_status_update(u32 *status,
			      int shift, int add, int timing)
{
	u32 mask	= 0xF << shift;
	u8 val		= (*status >> shift) & 0xF;
	u8 next_val	= (val + add) & 0xF;
	int func_call	= (val == timing);

	if (next_val == 0xF) /* underflow case */
		func_call = 0;
	else
		*status = (*status & ~mask) + (next_val << shift);

	return func_call;
}

#define rsnd_dai_call(fn, io, param...)					\
({									\
	struct rsnd_priv *priv = rsnd_io_to_priv(io);			\
	struct device *dev = rsnd_priv_to_dev(priv);			\
	struct rsnd_mod *mod;						\
	int is_play = rsnd_io_is_play(io);				\
	int ret = 0, i;							\
	enum rsnd_mod_type *types = rsnd_mod_sequence[is_play];		\
	for_each_rsnd_mod_arrays(i, mod, io, types, RSND_MOD_MAX) {	\
		int tmp = 0;						\
		u32 *status = mod->get_status(io, mod, types[i]);	\
		int func_call = rsnd_status_update(status,		\
						__rsnd_mod_shift_##fn,	\
						__rsnd_mod_add_##fn,	\
						__rsnd_mod_call_##fn);	\
		dev_dbg(dev, "%s[%d]\t0x%08x %s\n",			\
			rsnd_mod_name(mod), rsnd_mod_id(mod), *status,	\
			(func_call && (mod)->ops->fn) ? #fn : "");	\
		if (func_call && (mod)->ops->fn)			\
			tmp = (mod)->ops->fn(mod, io, param);		\
		if (tmp)						\
			dev_err(dev, "%s[%d] : %s error %d\n",		\
				rsnd_mod_name(mod), rsnd_mod_id(mod),	\
						     #fn, tmp);		\
		ret |= tmp;						\
	}								\
	ret;								\
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})

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int rsnd_dai_connect(struct rsnd_mod *mod,
		     struct rsnd_dai_stream *io,
		     enum rsnd_mod_type type)
503
{
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	struct rsnd_priv *priv;
	struct device *dev;
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507
	if (!mod)
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		return -EIO;

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	if (io->mod[type] == mod)
		return 0;

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	if (io->mod[type])
		return -EINVAL;

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	priv = rsnd_mod_to_priv(mod);
	dev = rsnd_priv_to_dev(priv);

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	io->mod[type] = mod;
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	dev_dbg(dev, "%s[%d] is connected to io (%s)\n",
		rsnd_mod_name(mod), rsnd_mod_id(mod),
		rsnd_io_is_play(io) ? "Playback" : "Capture");

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	return 0;
}

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static void rsnd_dai_disconnect(struct rsnd_mod *mod,
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				struct rsnd_dai_stream *io,
				enum rsnd_mod_type type)
531
{
532
	io->mod[type] = NULL;
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}

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struct rsnd_dai *rsnd_rdai_get(struct rsnd_priv *priv, int id)
536
{
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	if ((id < 0) || (id >= rsnd_rdai_nr(priv)))
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		return NULL;

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	return priv->rdai + id;
}

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#define rsnd_dai_to_priv(dai) snd_soc_dai_get_drvdata(dai)
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static struct rsnd_dai *rsnd_dai_to_rdai(struct snd_soc_dai *dai)
{
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	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
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	return rsnd_rdai_get(priv, dai->id);
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}

/*
 *	rsnd_soc_dai functions
 */
int rsnd_dai_pointer_offset(struct rsnd_dai_stream *io, int additional)
{
	struct snd_pcm_substream *substream = io->substream;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int pos = io->byte_pos + additional;

	pos %= (runtime->periods * io->byte_per_period);

	return pos;
}

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bool rsnd_dai_pointer_update(struct rsnd_dai_stream *io, int byte)
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{
	io->byte_pos += byte;

	if (io->byte_pos >= io->next_period_byte) {
		struct snd_pcm_substream *substream = io->substream;
		struct snd_pcm_runtime *runtime = substream->runtime;

		io->period_pos++;
		io->next_period_byte += io->byte_per_period;

		if (io->period_pos >= runtime->periods) {
			io->byte_pos = 0;
			io->period_pos = 0;
			io->next_period_byte = io->byte_per_period;
		}

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		return true;
583
	}
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	return false;
}

void rsnd_dai_period_elapsed(struct rsnd_dai_stream *io)
{
	struct snd_pcm_substream *substream = io->substream;

	/*
	 * this function should be called...
	 *
	 * - if rsnd_dai_pointer_update() returns true
	 * - without spin lock
	 */

	snd_pcm_period_elapsed(substream);
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}

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static void rsnd_dai_stream_init(struct rsnd_dai_stream *io,
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				struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;

	io->substream		= substream;
	io->byte_pos		= 0;
	io->period_pos		= 0;
	io->byte_per_period	= runtime->period_size *
				  runtime->channels *
				  samples_to_bytes(runtime, 1);
	io->next_period_byte	= io->byte_per_period;
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}
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static void rsnd_dai_stream_quit(struct rsnd_dai_stream *io)
{
	io->substream		= NULL;
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}

static
struct snd_soc_dai *rsnd_substream_to_dai(struct snd_pcm_substream *substream)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;

	return  rtd->cpu_dai;
}

static
struct rsnd_dai_stream *rsnd_rdai_to_io(struct rsnd_dai *rdai,
					struct snd_pcm_substream *substream)
{
	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
		return &rdai->playback;
	else
		return &rdai->capture;
}

static int rsnd_soc_dai_trigger(struct snd_pcm_substream *substream, int cmd,
			    struct snd_soc_dai *dai)
{
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	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
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	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
	int ret;
	unsigned long flags;

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	spin_lock_irqsave(&priv->lock, flags);
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	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
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	case SNDRV_PCM_TRIGGER_RESUME:
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		rsnd_dai_stream_init(io, substream);
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		ret = rsnd_dai_call(init, io, priv);
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		if (ret < 0)
			goto dai_trigger_end;

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		ret = rsnd_dai_call(start, io, priv);
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		if (ret < 0)
			goto dai_trigger_end;
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		ret = rsnd_dai_call(irq, io, priv, 1);
		if (ret < 0)
			goto dai_trigger_end;

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		break;
	case SNDRV_PCM_TRIGGER_STOP:
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	case SNDRV_PCM_TRIGGER_SUSPEND:
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		ret = rsnd_dai_call(irq, io, priv, 0);

		ret |= rsnd_dai_call(stop, io, priv);
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		ret |= rsnd_dai_call(quit, io, priv);
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		rsnd_dai_stream_quit(io);
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		break;
	default:
		ret = -EINVAL;
	}

dai_trigger_end:
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	spin_unlock_irqrestore(&priv->lock, flags);
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	return ret;
}

static int rsnd_soc_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBM_CFM:
695
		rdai->clk_master = 0;
696 697
		break;
	case SND_SOC_DAIFMT_CBS_CFS:
698
		rdai->clk_master = 1; /* codec is slave, cpu is master */
699 700 701 702 703 704 705 706 707 708
		break;
	default:
		return -EINVAL;
	}

	/* set format */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
		rdai->sys_delay = 0;
		rdai->data_alignment = 0;
709
		rdai->frm_clk_inv = 0;
710 711 712 713
		break;
	case SND_SOC_DAIFMT_LEFT_J:
		rdai->sys_delay = 1;
		rdai->data_alignment = 0;
714
		rdai->frm_clk_inv = 1;
715 716 717 718
		break;
	case SND_SOC_DAIFMT_RIGHT_J:
		rdai->sys_delay = 1;
		rdai->data_alignment = 1;
719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736
		rdai->frm_clk_inv = 1;
		break;
	}

	/* set clock inversion */
	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_IF:
		rdai->frm_clk_inv = !rdai->frm_clk_inv;
		break;
	case SND_SOC_DAIFMT_IB_NF:
		rdai->bit_clk_inv = !rdai->bit_clk_inv;
		break;
	case SND_SOC_DAIFMT_IB_IF:
		rdai->bit_clk_inv = !rdai->bit_clk_inv;
		rdai->frm_clk_inv = !rdai->frm_clk_inv;
		break;
	case SND_SOC_DAIFMT_NB_NF:
	default:
737 738 739 740 741 742
		break;
	}

	return 0;
}

743 744 745 746 747 748 749 750 751 752 753
static int rsnd_soc_set_dai_tdm_slot(struct snd_soc_dai *dai,
				     u32 tx_mask, u32 rx_mask,
				     int slots, int slot_width)
{
	struct rsnd_priv *priv = rsnd_dai_to_priv(dai);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct device *dev = rsnd_priv_to_dev(priv);

	switch (slots) {
	case 6:
		/* TDM Extend Mode */
754
		rsnd_set_slot(rdai, slots, 1);
755 756 757 758 759 760 761 762 763
		break;
	default:
		dev_err(dev, "unsupported TDM slots (%d)\n", slots);
		return -EINVAL;
	}

	return 0;
}

764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787
static int rsnd_soc_dai_startup(struct snd_pcm_substream *substream,
				struct snd_soc_dai *dai)
{
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);

	/*
	 * call rsnd_dai_call without spinlock
	 */
	return rsnd_dai_call(nolock_start, io, priv);
}

static void rsnd_soc_dai_shutdown(struct snd_pcm_substream *substream,
				  struct snd_soc_dai *dai)
{
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);

	/*
	 * call rsnd_dai_call without spinlock
	 */
	rsnd_dai_call(nolock_stop, io, priv);
}

788
static const struct snd_soc_dai_ops rsnd_soc_dai_ops = {
789 790
	.startup	= rsnd_soc_dai_startup,
	.shutdown	= rsnd_soc_dai_shutdown,
791 792
	.trigger	= rsnd_soc_dai_trigger,
	.set_fmt	= rsnd_soc_dai_set_fmt,
793
	.set_tdm_slot	= rsnd_soc_set_dai_tdm_slot,
794 795
};

796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822
void rsnd_parse_connect_common(struct rsnd_dai *rdai,
		struct rsnd_mod* (*mod_get)(struct rsnd_priv *priv, int id),
		struct device_node *node,
		struct device_node *playback,
		struct device_node *capture)
{
	struct rsnd_priv *priv = rsnd_rdai_to_priv(rdai);
	struct device_node *np;
	struct rsnd_mod *mod;
	int i;

	if (!node)
		return;

	i = 0;
	for_each_child_of_node(node, np) {
		mod = mod_get(priv, i);
		if (np == playback)
			rsnd_dai_connect(mod, &rdai->playback, mod->type);
		if (np == capture)
			rsnd_dai_connect(mod, &rdai->capture, mod->type);
		i++;
	}

	of_node_put(node);
}

823
static int rsnd_dai_probe(struct rsnd_priv *priv)
824
{
825
	struct device_node *dai_node;
826
	struct device_node *dai_np;
827
	struct device_node *playback, *capture;
828 829
	struct rsnd_dai_stream *io_playback;
	struct rsnd_dai_stream *io_capture;
830
	struct snd_soc_dai_driver *rdrv, *drv;
831
	struct rsnd_dai *rdai;
832
	struct device *dev = rsnd_priv_to_dev(priv);
833
	int nr, dai_i, io_i;
834
	int ret;
835

836
	dai_node = rsnd_dai_of_node(priv);
837
	nr = of_get_child_count(dai_node);
838 839 840
	if (!nr) {
		ret = -EINVAL;
		goto rsnd_dai_probe_done;
841 842
	}

843
	rdrv = devm_kzalloc(dev, sizeof(*rdrv) * nr, GFP_KERNEL);
844
	rdai = devm_kzalloc(dev, sizeof(*rdai) * nr, GFP_KERNEL);
845
	if (!rdrv || !rdai) {
846 847 848
		ret = -ENOMEM;
		goto rsnd_dai_probe_done;
	}
849

850
	priv->rdai_nr	= nr;
851
	priv->daidrv	= rdrv;
852
	priv->rdai	= rdai;
853 854 855 856 857 858

	/*
	 * parse all dai
	 */
	dai_i = 0;
	for_each_child_of_node(dai_node, dai_np) {
859
		rdai		= rsnd_rdai_get(priv, dai_i);
860
		drv		= rdrv + dai_i;
861 862 863 864 865 866 867 868 869 870 871 872 873 874
		io_playback	= &rdai->playback;
		io_capture	= &rdai->capture;

		snprintf(rdai->name, RSND_DAI_NAME_SIZE, "rsnd-dai.%d", dai_i);

		rdai->priv	= priv;
		drv->name	= rdai->name;
		drv->ops	= &rsnd_soc_dai_ops;

		snprintf(rdai->playback.name, RSND_DAI_NAME_SIZE,
			 "DAI%d Playback", dai_i);
		drv->playback.rates		= RSND_RATES;
		drv->playback.formats		= RSND_FMTS;
		drv->playback.channels_min	= 2;
875
		drv->playback.channels_max	= 6;
876 877 878 879 880 881 882
		drv->playback.stream_name	= rdai->playback.name;

		snprintf(rdai->capture.name, RSND_DAI_NAME_SIZE,
			 "DAI%d Capture", dai_i);
		drv->capture.rates		= RSND_RATES;
		drv->capture.formats		= RSND_FMTS;
		drv->capture.channels_min	= 2;
883
		drv->capture.channels_max	= 6;
884 885 886 887
		drv->capture.stream_name	= rdai->capture.name;

		rdai->playback.rdai		= rdai;
		rdai->capture.rdai		= rdai;
888
		rsnd_set_slot(rdai, 2, 1); /* default */
889

890 891 892
		for (io_i = 0;; io_i++) {
			playback = of_parse_phandle(dai_np, "playback", io_i);
			capture  = of_parse_phandle(dai_np, "capture", io_i);
893 894 895 896

			if (!playback && !capture)
				break;

897 898 899 900 901
			rsnd_parse_connect_ssi(rdai, playback, capture);
			rsnd_parse_connect_src(rdai, playback, capture);
			rsnd_parse_connect_ctu(rdai, playback, capture);
			rsnd_parse_connect_mix(rdai, playback, capture);
			rsnd_parse_connect_dvc(rdai, playback, capture);
902

903 904
			of_node_put(playback);
			of_node_put(capture);
905 906 907
		}

		dai_i++;
908

909 910 911
		dev_dbg(dev, "%s (%s/%s)\n", rdai->name,
			rsnd_io_to_mod_ssi(io_playback) ? "play"    : " -- ",
			rsnd_io_to_mod_ssi(io_capture) ? "capture" : "  --   ");
912 913
	}

914
	ret = 0;
915

916 917
rsnd_dai_probe_done:
	of_node_put(dai_node);
918

919
	return ret;
920 921 922 923 924 925 926 927
}

/*
 *		pcm ops
 */
static struct snd_pcm_hardware rsnd_pcm_hardware = {
	.info =		SNDRV_PCM_INFO_INTERLEAVED	|
			SNDRV_PCM_INFO_MMAP		|
928
			SNDRV_PCM_INFO_MMAP_VALID,
929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952
	.buffer_bytes_max	= 64 * 1024,
	.period_bytes_min	= 32,
	.period_bytes_max	= 8192,
	.periods_min		= 1,
	.periods_max		= 32,
	.fifo_size		= 256,
};

static int rsnd_pcm_open(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	int ret = 0;

	snd_soc_set_runtime_hwparams(substream, &rsnd_pcm_hardware);

	ret = snd_pcm_hw_constraint_integer(runtime,
					    SNDRV_PCM_HW_PARAM_PERIODS);

	return ret;
}

static int rsnd_hw_params(struct snd_pcm_substream *substream,
			 struct snd_pcm_hw_params *hw_params)
{
953 954 955 956 957 958 959 960 961
	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);
	int ret;

	ret = rsnd_dai_call(hw_params, io, substream, hw_params);
	if (ret)
		return ret;

962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

static snd_pcm_uframes_t rsnd_pointer(struct snd_pcm_substream *substream)
{
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_soc_dai *dai = rsnd_substream_to_dai(substream);
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
	struct rsnd_dai_stream *io = rsnd_rdai_to_io(rdai, substream);

	return bytes_to_frames(runtime, io->byte_pos);
}

static struct snd_pcm_ops rsnd_pcm_ops = {
	.open		= rsnd_pcm_open,
	.ioctl		= snd_pcm_lib_ioctl,
	.hw_params	= rsnd_hw_params,
	.hw_free	= snd_pcm_lib_free_pages,
	.pointer	= rsnd_pointer,
};

984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045
/*
 *		snd_kcontrol
 */
#define kcontrol_to_cfg(kctrl) ((struct rsnd_kctrl_cfg *)kctrl->private_value)
static int rsnd_kctrl_info(struct snd_kcontrol *kctrl,
			   struct snd_ctl_elem_info *uinfo)
{
	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);

	if (cfg->texts) {
		uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
		uinfo->count = cfg->size;
		uinfo->value.enumerated.items = cfg->max;
		if (uinfo->value.enumerated.item >= cfg->max)
			uinfo->value.enumerated.item = cfg->max - 1;
		strlcpy(uinfo->value.enumerated.name,
			cfg->texts[uinfo->value.enumerated.item],
			sizeof(uinfo->value.enumerated.name));
	} else {
		uinfo->count = cfg->size;
		uinfo->value.integer.min = 0;
		uinfo->value.integer.max = cfg->max;
		uinfo->type = (cfg->max == 1) ?
			SNDRV_CTL_ELEM_TYPE_BOOLEAN :
			SNDRV_CTL_ELEM_TYPE_INTEGER;
	}

	return 0;
}

static int rsnd_kctrl_get(struct snd_kcontrol *kctrl,
			  struct snd_ctl_elem_value *uc)
{
	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
	int i;

	for (i = 0; i < cfg->size; i++)
		if (cfg->texts)
			uc->value.enumerated.item[i] = cfg->val[i];
		else
			uc->value.integer.value[i] = cfg->val[i];

	return 0;
}

static int rsnd_kctrl_put(struct snd_kcontrol *kctrl,
			  struct snd_ctl_elem_value *uc)
{
	struct rsnd_mod *mod = snd_kcontrol_chip(kctrl);
	struct rsnd_kctrl_cfg *cfg = kcontrol_to_cfg(kctrl);
	int i, change = 0;

	for (i = 0; i < cfg->size; i++) {
		if (cfg->texts) {
			change |= (uc->value.enumerated.item[i] != cfg->val[i]);
			cfg->val[i] = uc->value.enumerated.item[i];
		} else {
			change |= (uc->value.integer.value[i] != cfg->val[i]);
			cfg->val[i] = uc->value.integer.value[i];
		}
	}

1046
	if (change && cfg->update)
1047
		cfg->update(cfg->io, mod);
1048 1049 1050 1051

	return change;
}

1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075
struct rsnd_kctrl_cfg *rsnd_kctrl_init_m(struct rsnd_kctrl_cfg_m *cfg)
{
	cfg->cfg.val = cfg->val;

	return &cfg->cfg;
}

struct rsnd_kctrl_cfg *rsnd_kctrl_init_s(struct rsnd_kctrl_cfg_s *cfg)
{
	cfg->cfg.val = &cfg->val;

	return &cfg->cfg;
}

int rsnd_kctrl_new(struct rsnd_mod *mod,
		   struct rsnd_dai_stream *io,
		   struct snd_soc_pcm_runtime *rtd,
		   const unsigned char *name,
		   void (*update)(struct rsnd_dai_stream *io,
				  struct rsnd_mod *mod),
		   struct rsnd_kctrl_cfg *cfg,
		   const char * const *texts,
		   int size,
		   u32 max)
1076 1077 1078 1079 1080 1081 1082
{
	struct snd_card *card = rtd->card->snd_card;
	struct snd_kcontrol *kctrl;
	struct snd_kcontrol_new knew = {
		.iface		= SNDRV_CTL_ELEM_IFACE_MIXER,
		.name		= name,
		.info		= rsnd_kctrl_info,
1083
		.index		= rtd->num,
1084 1085 1086 1087 1088 1089
		.get		= rsnd_kctrl_get,
		.put		= rsnd_kctrl_put,
		.private_value	= (unsigned long)cfg,
	};
	int ret;

1090 1091 1092
	if (size > RSND_MAX_CHANNELS)
		return -EINVAL;

1093 1094 1095 1096 1097
	kctrl = snd_ctl_new1(&knew, mod);
	if (!kctrl)
		return -ENOMEM;

	ret = snd_ctl_add(card, kctrl);
1098
	if (ret < 0)
1099 1100
		return ret;

1101 1102 1103 1104 1105 1106 1107
	cfg->texts	= texts;
	cfg->max	= max;
	cfg->size	= size;
	cfg->update	= update;
	cfg->card	= card;
	cfg->kctrl	= kctrl;
	cfg->io		= io;
1108 1109 1110 1111

	return 0;
}

1112 1113 1114 1115 1116 1117 1118 1119 1120
/*
 *		snd_soc_platform
 */

#define PREALLOC_BUFFER		(32 * 1024)
#define PREALLOC_BUFFER_MAX	(32 * 1024)

static int rsnd_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
1121 1122
	struct snd_soc_dai *dai = rtd->cpu_dai;
	struct rsnd_dai *rdai = rsnd_dai_to_rdai(dai);
1123
	int ret;
1124

1125 1126 1127
	ret = rsnd_dai_call(pcm_new, &rdai->playback, rtd);
	if (ret)
		return ret;
1128

1129
	ret = rsnd_dai_call(pcm_new, &rdai->capture, rtd);
1130 1131
	if (ret)
		return ret;
1132

1133 1134
	return snd_pcm_lib_preallocate_pages_for_all(
		rtd->pcm,
1135 1136
		SNDRV_DMA_TYPE_CONTINUOUS,
		snd_dma_continuous_data(GFP_KERNEL),
1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148
		PREALLOC_BUFFER, PREALLOC_BUFFER_MAX);
}

static struct snd_soc_platform_driver rsnd_soc_platform = {
	.ops		= &rsnd_pcm_ops,
	.pcm_new	= rsnd_pcm_new,
};

static const struct snd_soc_component_driver rsnd_soc_component = {
	.name		= "rsnd",
};

1149
static int rsnd_rdai_continuance_probe(struct rsnd_priv *priv,
1150
				       struct rsnd_dai_stream *io)
1151 1152 1153
{
	int ret;

1154
	ret = rsnd_dai_call(probe, io, priv);
1155
	if (ret == -EAGAIN) {
1156
		struct rsnd_mod *ssi_mod = rsnd_io_to_mod_ssi(io);
1157
		struct rsnd_mod *mod;
1158 1159
		int i;

1160 1161 1162 1163 1164 1165 1166 1167 1168
		/*
		 * Fallback to PIO mode
		 */

		/*
		 * call "remove" for SSI/SRC/DVC
		 * SSI will be switch to PIO mode if it was DMA mode
		 * see
		 *	rsnd_dma_init()
1169
		 *	rsnd_ssi_fallback()
1170
		 */
1171
		rsnd_dai_call(remove, io, priv);
1172 1173

		/*
1174 1175
		 * remove all mod from io
		 * and, re connect ssi
1176
		 */
1177 1178
		for_each_rsnd_mod(i, mod, io)
			rsnd_dai_disconnect(mod, io, i);
1179
		rsnd_dai_connect(ssi_mod, io, RSND_MOD_SSI);
1180

1181 1182 1183
		/*
		 * fallback
		 */
1184
		rsnd_dai_call(fallback, io, priv);
1185

1186 1187 1188 1189
		/*
		 * retry to "probe".
		 * DAI has SSI which is PIO mode only now.
		 */
1190
		ret = rsnd_dai_call(probe, io, priv);
1191 1192 1193 1194 1195
	}

	return ret;
}

1196 1197 1198 1199 1200 1201 1202
/*
 *	rsnd probe
 */
static int rsnd_probe(struct platform_device *pdev)
{
	struct rsnd_priv *priv;
	struct device *dev = &pdev->dev;
1203
	struct rsnd_dai *rdai;
1204
	int (*probe_func[])(struct rsnd_priv *priv) = {
1205
		rsnd_gen_probe,
1206
		rsnd_dma_probe,
1207
		rsnd_ssi_probe,
1208
		rsnd_ssiu_probe,
1209
		rsnd_src_probe,
1210
		rsnd_ctu_probe,
1211
		rsnd_mix_probe,
1212
		rsnd_dvc_probe,
1213
		rsnd_cmd_probe,
1214 1215 1216 1217
		rsnd_adg_probe,
		rsnd_dai_probe,
	};
	int ret, i;
1218 1219 1220 1221 1222 1223 1224 1225 1226 1227

	/*
	 *	init priv data
	 */
	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(dev, "priv allocate failed\n");
		return -ENODEV;
	}

1228
	priv->pdev	= pdev;
1229
	priv->flags	= (unsigned long)of_device_get_match_data(dev);
1230 1231 1232 1233 1234
	spin_lock_init(&priv->lock);

	/*
	 *	init each module
	 */
1235
	for (i = 0; i < ARRAY_SIZE(probe_func); i++) {
1236
		ret = probe_func[i](priv);
1237 1238 1239
		if (ret)
			return ret;
	}
1240

1241
	for_each_rsnd_dai(rdai, priv, i) {
1242
		ret = rsnd_rdai_continuance_probe(priv, &rdai->playback);
1243
		if (ret)
1244
			goto exit_snd_probe;
1245

1246
		ret = rsnd_rdai_continuance_probe(priv, &rdai->capture);
1247
		if (ret)
1248
			goto exit_snd_probe;
1249
	}
1250

1251 1252
	dev_set_drvdata(dev, priv);

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262
	/*
	 *	asoc register
	 */
	ret = snd_soc_register_platform(dev, &rsnd_soc_platform);
	if (ret < 0) {
		dev_err(dev, "cannot snd soc register\n");
		return ret;
	}

	ret = snd_soc_register_component(dev, &rsnd_soc_component,
1263
					 priv->daidrv, rsnd_rdai_nr(priv));
1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
	if (ret < 0) {
		dev_err(dev, "cannot snd dai register\n");
		goto exit_snd_soc;
	}

	pm_runtime_enable(dev);

	dev_info(dev, "probed\n");
	return ret;

exit_snd_soc:
	snd_soc_unregister_platform(dev);
1276 1277
exit_snd_probe:
	for_each_rsnd_dai(rdai, priv, i) {
1278 1279
		rsnd_dai_call(remove, &rdai->playback, priv);
		rsnd_dai_call(remove, &rdai->capture, priv);
1280
	}
1281 1282 1283 1284 1285 1286 1287

	return ret;
}

static int rsnd_remove(struct platform_device *pdev)
{
	struct rsnd_priv *priv = dev_get_drvdata(&pdev->dev);
1288
	struct rsnd_dai *rdai;
1289
	void (*remove_func[])(struct rsnd_priv *priv) = {
1290
		rsnd_ssi_remove,
1291
		rsnd_ssiu_remove,
1292
		rsnd_src_remove,
1293
		rsnd_ctu_remove,
1294
		rsnd_mix_remove,
1295
		rsnd_dvc_remove,
1296
		rsnd_cmd_remove,
1297
		rsnd_adg_remove,
1298
	};
1299
	int ret = 0, i;
1300 1301 1302

	pm_runtime_disable(&pdev->dev);

1303
	for_each_rsnd_dai(rdai, priv, i) {
1304 1305
		ret |= rsnd_dai_call(remove, &rdai->playback, priv);
		ret |= rsnd_dai_call(remove, &rdai->capture, priv);
1306
	}
1307

1308
	for (i = 0; i < ARRAY_SIZE(remove_func); i++)
1309
		remove_func[i](priv);
1310

1311 1312 1313
	snd_soc_unregister_component(&pdev->dev);
	snd_soc_unregister_platform(&pdev->dev);

1314
	return ret;
1315 1316
}

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static int rsnd_suspend(struct device *dev)
{
	struct rsnd_priv *priv = dev_get_drvdata(dev);

	rsnd_adg_clk_disable(priv);

	return 0;
}

static int rsnd_resume(struct device *dev)
{
	struct rsnd_priv *priv = dev_get_drvdata(dev);

	rsnd_adg_clk_enable(priv);

	return 0;
}

static struct dev_pm_ops rsnd_pm_ops = {
	.suspend		= rsnd_suspend,
	.resume			= rsnd_resume,
};

1340 1341 1342
static struct platform_driver rsnd_driver = {
	.driver	= {
		.name	= "rcar_sound",
1343
		.pm	= &rsnd_pm_ops,
1344
		.of_match_table = rsnd_of_match,
1345 1346 1347 1348 1349 1350 1351 1352 1353 1354
	},
	.probe		= rsnd_probe,
	.remove		= rsnd_remove,
};
module_platform_driver(rsnd_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Renesas R-Car audio driver");
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
MODULE_ALIAS("platform:rcar-pcm-audio");