/*
  Copyright(c) 2014-2015 Intel Corporation
  All rights reserved.

  This library is free software; you can redistribute it and/or modify
  it under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of
  the License, or (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Lesser General Public License for more details.

  Authors: Mengdong Lin <mengdong.lin@intel.com>
           Yao Jin <yao.jin@intel.com>
           Liam Girdwood <liam.r.girdwood@linux.intel.com>
*/

#include "list.h"
#include "tplg_local.h"

#define RATE(v) [SND_PCM_RATE_##v] = #v

static const char *const snd_pcm_rate_names[] = {
	RATE(5512),
	RATE(8000),
	RATE(11025),
	RATE(16000),
	RATE(22050),
	RATE(32000),
	RATE(44100),
	RATE(48000),
	RATE(64000),
	RATE(88200),
	RATE(96000),
	RATE(176400),
	RATE(192000),
	RATE(CONTINUOUS),
	RATE(KNOT),
};

struct tplg_elem *lookup_pcm_dai_stream(struct list_head *base, const char* id)
{
	struct list_head *pos;
	struct tplg_elem *elem;
	struct snd_soc_tplg_pcm *pcm;

	list_for_each(pos, base) {

		elem = list_entry(pos, struct tplg_elem, list);
		if (elem->type != SND_TPLG_TYPE_PCM)
			return NULL;

		pcm = elem->pcm;

		if (pcm && !strcmp(pcm->dai_name, id))
			return elem;
	}

	return NULL;
}

/* copy referenced caps to the parent (pcm or be dai) */
static void copy_stream_caps(const char *id,
	struct snd_soc_tplg_stream_caps *caps, struct tplg_elem *ref_elem)
{
	struct snd_soc_tplg_stream_caps *ref_caps = ref_elem->stream_caps;

	tplg_dbg("Copy pcm caps (%ld bytes) from '%s' to '%s' \n",
		sizeof(*caps), ref_elem->id, id);

	*caps =  *ref_caps;
}

/* find and copy the referenced stream caps */
static int tplg_build_stream_caps(snd_tplg_t *tplg,
	const char *id, int index, struct snd_soc_tplg_stream_caps *caps)
{
	struct tplg_elem *ref_elem = NULL;
	unsigned int i;

	for (i = 0; i < 2; i++) {
		ref_elem = tplg_elem_lookup(&tplg->pcm_caps_list,
			caps[i].name, SND_TPLG_TYPE_STREAM_CAPS, index);

		if (ref_elem != NULL)
			copy_stream_caps(id, &caps[i], ref_elem);
	}

	return 0;
}

/* build a PCM (FE DAI & DAI link) element */
static int build_pcm(snd_tplg_t *tplg, struct tplg_elem *elem)
{
	struct tplg_ref *ref;
	struct list_head *base, *pos;
	int err;

	err = tplg_build_stream_caps(tplg, elem->id, elem->index,
						elem->pcm->caps);
	if (err < 0)
		return err;

	/* merge private data from the referenced data elements */
	base = &elem->ref_list;
	list_for_each(pos, base) {

		ref = list_entry(pos, struct tplg_ref, list);
		if (ref->type == SND_TPLG_TYPE_DATA) {
			err = tplg_copy_data(tplg, elem, ref);
			if (err < 0)
				return err;
		}
		if (!ref->elem) {
			SNDERR("error: cannot find '%s' referenced by"
				" PCM '%s'\n", ref->id, elem->id);
			return -EINVAL;
		}
	}

	return 0;
}

/* build all PCM (FE DAI & DAI link) elements */
int tplg_build_pcms(snd_tplg_t *tplg, unsigned int type)
{
	struct list_head *base, *pos;
	struct tplg_elem *elem;
	int err = 0;

	base = &tplg->pcm_list;
	list_for_each(pos, base) {

		elem = list_entry(pos, struct tplg_elem, list);
		if (elem->type != type) {
			SNDERR("error: invalid elem '%s'\n", elem->id);
			return -EINVAL;
		}

		err = build_pcm(tplg, elem);
		if (err < 0)
			return err;

		/* add PCM to manifest */
		tplg->manifest.pcm_elems++;
	}

	return 0;
}

/* build a physical DAI */
static int tplg_build_dai(snd_tplg_t *tplg, struct tplg_elem *elem)
{
	struct tplg_ref *ref;
	struct list_head *base, *pos;
	int err = 0;

	/* get playback & capture stream caps */
	err = tplg_build_stream_caps(tplg, elem->id, elem->index,
						elem->dai->caps);
	if (err < 0)
		return err;

	/* get private data */
	base = &elem->ref_list;
	list_for_each(pos, base) {

		ref = list_entry(pos, struct tplg_ref, list);

		if (ref->type == SND_TPLG_TYPE_DATA) {
			err = tplg_copy_data(tplg, elem, ref);
			if (err < 0)
				return err;
		}
	}

	/* add DAI to manifest */
	tplg->manifest.dai_elems++;

	return 0;
}

/* build physical DAIs*/
int tplg_build_dais(snd_tplg_t *tplg, unsigned int type)
{
	struct list_head *base, *pos;
	struct tplg_elem *elem;
	int err = 0;

	base = &tplg->dai_list;
	list_for_each(pos, base) {

		elem = list_entry(pos, struct tplg_elem, list);
		if (elem->type != type) {
			SNDERR("error: invalid elem '%s'\n", elem->id);
			return -EINVAL;
		}

		err = tplg_build_dai(tplg, elem);
		if (err < 0)
			return err;
	}

	return 0;
}

static int tplg_build_stream_cfg(snd_tplg_t *tplg,
	struct snd_soc_tplg_stream *stream, int num_streams, int index)
{
	struct snd_soc_tplg_stream *strm;
	struct tplg_elem *ref_elem;
	int i;

	for (i = 0; i < num_streams; i++) {
		strm = stream + i;
		ref_elem = tplg_elem_lookup(&tplg->pcm_config_list,
			strm->name, SND_TPLG_TYPE_STREAM_CONFIG, index);

		if (ref_elem && ref_elem->stream_cfg)
			*strm = *ref_elem->stream_cfg;
	}

	return 0;
}

static int build_link(snd_tplg_t *tplg, struct tplg_elem *elem)
{
	struct snd_soc_tplg_link_config *link = elem->link;
	struct tplg_ref *ref;
	struct list_head *base, *pos;
	int num_hw_configs = 0, err = 0;

	err = tplg_build_stream_cfg(tplg, link->stream,
				    link->num_streams, elem->index);
	if (err < 0)
		return err;

	/* hw configs & private data */
	base = &elem->ref_list;
	list_for_each(pos, base) {

		ref = list_entry(pos, struct tplg_ref, list);

		switch (ref->type) {
		case SND_TPLG_TYPE_HW_CONFIG:
			ref->elem = tplg_elem_lookup(&tplg->hw_cfg_list,
				ref->id, SND_TPLG_TYPE_HW_CONFIG, elem->index);
			if (!ref->elem) {
				SNDERR("error: cannot find HW config '%s'"
				" referenced by link '%s'\n",
				ref->id, elem->id);
				return -EINVAL;
			}

			memcpy(&link->hw_config[num_hw_configs],
				ref->elem->hw_cfg,
				sizeof(struct snd_soc_tplg_hw_config));
			num_hw_configs++;
			break;

		case SND_TPLG_TYPE_DATA: /* merge private data */
			err = tplg_copy_data(tplg, elem, ref);
			if (err < 0)
				return err;
			break;

		default:
			break;
		}
	}

	/* add link to manifest */
	tplg->manifest.dai_link_elems++;

	return 0;
}

/* build physical DAI link configurations */
int tplg_build_links(snd_tplg_t *tplg, unsigned int type)
{
	struct list_head *base, *pos;
	struct tplg_elem *elem;
	int err = 0;

	switch (type) {
	case SND_TPLG_TYPE_LINK:
	case SND_TPLG_TYPE_BE:
		base = &tplg->be_list;
		break;
	case SND_TPLG_TYPE_CC:
		base = &tplg->cc_list;
		break;
	default:
		return -EINVAL;
	}

	list_for_each(pos, base) {

		elem = list_entry(pos, struct tplg_elem, list);
		err =  build_link(tplg, elem);
		if (err < 0)
			return err;
	}

	return 0;
}

static int split_format(struct snd_soc_tplg_stream_caps *caps, char *str)
{
	char *s = NULL;
	snd_pcm_format_t format;
	int i = 0;

	s = strtok(str, ",");
	while ((s != NULL) && (i < SND_SOC_TPLG_MAX_FORMATS)) {
		format = snd_pcm_format_value(s);
		if (format == SND_PCM_FORMAT_UNKNOWN) {
			SNDERR("error: unsupported stream format %s\n", s);
			return -EINVAL;
		}

		caps->formats |= 1 << format;
		s = strtok(NULL, ", ");
		i++;
	}

	return 0;
}

static int get_rate_value(const char* name)
{
	int rate;
	for (rate = 0; rate <= SND_PCM_RATE_LAST; rate++) {
		if (snd_pcm_rate_names[rate] &&
		    strcasecmp(name, snd_pcm_rate_names[rate]) == 0) {
			return rate;
		}
	}

	return SND_PCM_RATE_UNKNOWN;
}

static int split_rate(struct snd_soc_tplg_stream_caps *caps, char *str)
{
	char *s = NULL;
	snd_pcm_rates_t rate;
	int i = 0;

	s = strtok(str, ",");
	while (s) {
		rate = get_rate_value(s);

		if (rate == SND_PCM_RATE_UNKNOWN) {
			SNDERR("error: unsupported stream rate %s\n", s);
			return -EINVAL;
		}

		caps->rates |= 1 << rate;
		s = strtok(NULL, ", ");
		i++;
	}

	return 0;
}

/* Parse pcm stream capabilities */
int tplg_parse_stream_caps(snd_tplg_t *tplg,
	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
{
	struct snd_soc_tplg_stream_caps *sc;
	struct tplg_elem *elem;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val;
	char *s;
	int err;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_STREAM_CAPS);
	if (!elem)
		return -ENOMEM;

	sc = elem->stream_caps;
	sc->size = elem->size;
	elem_copy_text(sc->name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	tplg_dbg(" PCM Capabilities: %s\n", elem->id);

	snd_config_for_each(i, next, cfg) {
		n = snd_config_iterator_entry(i);
		if (snd_config_get_id(n, &id) < 0)
			continue;

		/* skip comments */
		if (strcmp(id, "comment") == 0)
			continue;
		if (id[0] == '#')
			continue;

		if (snd_config_get_string(n, &val) < 0)
			return -EINVAL;

		if (strcmp(id, "formats") == 0) {
			s = strdup(val);
			if (s == NULL)
				return -ENOMEM;

			err = split_format(sc, s);
			free(s);

			if (err < 0)
				return err;

			tplg_dbg("\t\t%s: %s\n", id, val);
			continue;
		}

		if (strcmp(id, "rates") == 0) {
			s = strdup(val);
			if (!s)
				return -ENOMEM;

			err = split_rate(sc, s);
			free(s);

			if (err < 0)
				return err;

			tplg_dbg("\t\t%s: %s\n", id, val);
			continue;
		}

		if (strcmp(id, "rate_min") == 0) {
			sc->rate_min = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->rate_min);
			continue;
		}

		if (strcmp(id, "rate_max") == 0) {
			sc->rate_max = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->rate_max);
			continue;
		}

		if (strcmp(id, "channels_min") == 0) {
			sc->channels_min = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->channels_min);
			continue;
		}

		if (strcmp(id, "channels_max") == 0) {
			sc->channels_max = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->channels_max);
			continue;
		}

		if (strcmp(id, "periods_min") == 0) {
			sc->periods_min = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->periods_min);
			continue;
		}

		if (strcmp(id, "periods_max") == 0) {
			sc->periods_max = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->periods_max);
			continue;
		}

		if (strcmp(id, "period_size_min") == 0) {
			sc->period_size_min = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->period_size_min);
			continue;
		}

		if (strcmp(id, "period_size_max") == 0) {
			sc->period_size_max = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->period_size_max);
			continue;
		}

		if (strcmp(id, "buffer_size_min") == 0) {
			sc->buffer_size_min = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->buffer_size_min);
			continue;
		}

		if (strcmp(id, "buffer_size_max") == 0) {
			sc->buffer_size_max = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->buffer_size_max);
			continue;
		}

		if (strcmp(id, "sig_bits") == 0) {
			sc->sig_bits = atoi(val);
			tplg_dbg("\t\t%s: %d\n", id, sc->sig_bits);
			continue;
		}

	}

	return 0;
}

/* Parse the caps and config of a pcm stream */
static int tplg_parse_streams(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
			      snd_config_t *cfg, void *private)
{
	snd_config_iterator_t i, next;
	snd_config_t *n;
	struct tplg_elem *elem = private;
	struct snd_soc_tplg_pcm *pcm;
	struct snd_soc_tplg_dai *dai;
	unsigned int *playback, *capture;
	struct snd_soc_tplg_stream_caps *caps;
	const char *id, *value;
	int stream;

	snd_config_get_id(cfg, &id);

	tplg_dbg("\t%s:\n", id);

	switch (elem->type) {
	case SND_TPLG_TYPE_PCM:
		pcm = elem->pcm;
		playback = &pcm->playback;
		capture = &pcm->capture;
		caps = pcm->caps;
		break;

	case SND_TPLG_TYPE_DAI:
		dai = elem->dai;
		playback = &dai->playback;
		capture = &dai->capture;
		caps = dai->caps;
		break;

	default:
		return -EINVAL;
	}

	if (strcmp(id, "playback") == 0) {
		stream = SND_SOC_TPLG_STREAM_PLAYBACK;
		*playback = 1;
	} else if (strcmp(id, "capture") == 0) {
		stream = SND_SOC_TPLG_STREAM_CAPTURE;
		*capture = 1;
	} else
		return -EINVAL;

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);

		/* get id */
		if (snd_config_get_id(n, &id) < 0)
			continue;

		if (strcmp(id, "capabilities") == 0) {
			if (snd_config_get_string(n, &value) < 0)
				continue;
			/* store stream caps name, to find and merge
			 * the caps in building phase.
			 */
			elem_copy_text(caps[stream].name, value,
				SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

			tplg_dbg("\t\t%s\n\t\t\t%s\n", id, value);
			continue;
		}
	}

	return 0;
}

/* Parse name and id of a front-end DAI (ie. cpu dai of a FE DAI link) */
static int tplg_parse_fe_dai(snd_tplg_t *tplg ATTRIBUTE_UNUSED,
			     snd_config_t *cfg, void *private)
{
	struct tplg_elem *elem = private;
	struct snd_soc_tplg_pcm *pcm = elem->pcm;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *value = NULL;
	unsigned long int id_val;

	snd_config_get_id(cfg, &id);
	tplg_dbg("\t\tFE DAI %s:\n", id);
	elem_copy_text(pcm->dai_name, id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);

		/* get id */
		if (snd_config_get_id(n, &id) < 0)
			continue;

		if (strcmp(id, "id") == 0) {
			if (snd_config_get_string(n, &value) < 0)
				continue;
			errno = 0;
			/* no support for negative value */
			id_val = strtoul(value, NULL, 0);
			if ((errno == ERANGE && id_val == ULONG_MAX)
				|| (errno != 0 && id_val == 0)
				|| id_val > UINT_MAX) {
				SNDERR("error: invalid fe dai ID\n");
				return -EINVAL;
			}

			pcm->dai_id = (int) id_val;
			tplg_dbg("\t\t\tindex: %d\n", pcm->dai_id);
		}
	}

	return 0;
}

/* parse a flag bit of the given mask */
static int parse_flag(snd_config_t *n, unsigned int mask_in,
		      unsigned int *mask, unsigned int *flags)
{
	int ret;

	ret = snd_config_get_bool(n);
	if (ret < 0)
		return ret;

	*mask |= mask_in;
	if (ret)
		*flags |= mask_in;
	else
		*flags &= ~mask_in;

	return 0;
}

/* Parse PCM (for front end DAI & DAI link) in text conf file */
int tplg_parse_pcm(snd_tplg_t *tplg,
	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
{
	struct snd_soc_tplg_pcm *pcm;
	struct tplg_elem *elem;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val = NULL;
	int err;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_PCM);
	if (!elem)
		return -ENOMEM;

	pcm = elem->pcm;
	pcm->size = elem->size;
	elem_copy_text(pcm->pcm_name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	tplg_dbg(" PCM: %s\n", elem->id);

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);
		if (snd_config_get_id(n, &id) < 0)
			continue;

		/* skip comments */
		if (strcmp(id, "comment") == 0)
			continue;
		if (id[0] == '#')
			continue;

		if (strcmp(id, "id") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			pcm->pcm_id = atoi(val);
			tplg_dbg("\t%s: %d\n", id, pcm->pcm_id);
			continue;
		}

		if (strcmp(id, "pcm") == 0) {
			err = tplg_parse_compound(tplg, n,
				tplg_parse_streams, elem);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "compress") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (strcmp(val, "true") == 0)
				pcm->compress = 1;

			tplg_dbg("\t%s: %s\n", id, val);
			continue;
		}

		if (strcmp(id, "dai") == 0) {
			err = tplg_parse_compound(tplg, n,
				tplg_parse_fe_dai, elem);
			if (err < 0)
				return err;
			continue;
		}

		/* flags */
		if (strcmp(id, "symmetric_rates") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_RATES,
				&pcm->flag_mask, &pcm->flags);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "symmetric_channels") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_CHANNELS,
				&pcm->flag_mask, &pcm->flags);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "symmetric_sample_bits") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_SAMPLEBITS,
				&pcm->flag_mask, &pcm->flags);
			if (err < 0)
				return err;
			continue;
		}
	}

	return 0;
}

/* Parse physical DAI */
int tplg_parse_dai(snd_tplg_t *tplg,
	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
{
	struct snd_soc_tplg_dai *dai;
	struct tplg_elem *elem;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val = NULL;
	int err;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_DAI);
	if (!elem)
		return -ENOMEM;

	dai = elem->dai;
	dai->size = elem->size;
	elem_copy_text(dai->dai_name, elem->id,
		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	tplg_dbg(" DAI: %s\n", elem->id);

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);
		if (snd_config_get_id(n, &id) < 0)
			continue;

		/* skip comments */
		if (strcmp(id, "comment") == 0)
			continue;
		if (id[0] == '#')
			continue;

		if (strcmp(id, "id") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			dai->dai_id = atoi(val);
			tplg_dbg("\t%s: %d\n", id, dai->dai_id);
			continue;
		}

		if (strcmp(id, "playback") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			dai->playback = atoi(val);
			tplg_dbg("\t%s: %d\n", id, dai->playback);
			continue;
		}


		if (strcmp(id, "capture") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			dai->capture = atoi(val);
			tplg_dbg("\t%s: %d\n", id, dai->capture);
			continue;
		}


		/* stream capabilities */
		if (strcmp(id, "pcm") == 0) {
			err = tplg_parse_compound(tplg, n,
				tplg_parse_streams, elem);
			if (err < 0)
				return err;
			continue;
		}

		/* flags */
		if (strcmp(id, "symmetric_rates") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_RATES,
				&dai->flag_mask, &dai->flags);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "symmetric_channels") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_CHANNELS,
				&dai->flag_mask, &dai->flags);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "symmetric_sample_bits") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_SAMPLEBITS,
				&dai->flag_mask, &dai->flags);
			if (err < 0)
				return err;
			continue;
		}

		/* private data */
		if (strcmp(id, "data") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			tplg_ref_add(elem, SND_TPLG_TYPE_DATA, val);
			tplg_dbg("\t%s: %s\n", id, val);
			continue;
		}
	}

	return 0;
}

/* parse physical link runtime supported HW configs in text conf file */
static int parse_hw_config_refs(snd_tplg_t *tplg, snd_config_t *cfg,
				struct tplg_elem *elem)
{
	struct snd_soc_tplg_link_config *link = elem->link;
	snd_config_type_t  type;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val = NULL;

	if (snd_config_get_id(cfg, &id) < 0)
		return -EINVAL;
	type = snd_config_get_type(cfg);

	/* refer to a single HW config */
	if (type == SND_CONFIG_TYPE_STRING) {
		if (snd_config_get_string(cfg, &val) < 0)
			return -EINVAL;

		link->num_hw_configs = 1;
		return tplg_ref_add(elem, SND_TPLG_TYPE_HW_CONFIG, val);
	}

	if (type != SND_CONFIG_TYPE_COMPOUND) {
		SNDERR("error: compound type expected for %s", id);
		return -EINVAL;
	}

	/* refer to a list of HW configs */
	snd_config_for_each(i, next, cfg) {
		const char *val;

		n = snd_config_iterator_entry(i);
		if (snd_config_get_string(n, &val) < 0)
			continue;

		if (link->num_hw_configs >= SND_SOC_TPLG_HW_CONFIG_MAX) {
			SNDERR("error: exceed max hw configs for link %s", id);
			return -EINVAL;
		}

		link->num_hw_configs++;
		return tplg_ref_add(elem, SND_TPLG_TYPE_HW_CONFIG, val);
	}

	return 0;
}

/* Parse a physical link element in text conf file */
int tplg_parse_link(snd_tplg_t *tplg,
	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
{
	struct snd_soc_tplg_link_config *link;
	struct tplg_elem *elem;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val = NULL;
	int err;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_BE);
	if (!elem)
		return -ENOMEM;

	link = elem->link;
	link->size = elem->size;
	elem_copy_text(link->name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	tplg_dbg(" Link: %s\n", elem->id);

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);
		if (snd_config_get_id(n, &id) < 0)
			continue;

		/* skip comments */
		if (strcmp(id, "comment") == 0)
			continue;
		if (id[0] == '#')
			continue;

		if (strcmp(id, "id") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			link->id = atoi(val);
			tplg_dbg("\t%s: %d\n", id, link->id);
			continue;
		}

		if (strcmp(id, "stream_name") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			elem_copy_text(link->stream_name, val,
				       SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
			tplg_dbg("\t%s: %s\n", id, val);
			continue;
		}

		if (strcmp(id, "hw_configs") == 0) {
			err = parse_hw_config_refs(tplg, n, elem);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "default_hw_conf_id") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			link->default_hw_config_id = atoi(val);
			continue;
		}

		/* flags */
		if (strcmp(id, "symmetric_rates") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_RATES,
				&link->flag_mask, &link->flags);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "symmetric_channels") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_CHANNELS,
				&link->flag_mask, &link->flags);
			if (err < 0)
				return err;
			continue;
		}

		if (strcmp(id, "symmetric_sample_bits") == 0) {
			err = parse_flag(n,
				SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_SAMPLEBITS,
				&link->flag_mask, &link->flags);
			if (err < 0)
				return err;
			continue;
		}

		/* private data */
		if (strcmp(id, "data") == 0) {
			err = tplg_parse_data_refs(n, elem);
			if (err < 0)
				return err;
			continue;
		}
	}

	return 0;
}

/* Parse cc */
int tplg_parse_cc(snd_tplg_t *tplg,
	snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)
{
	struct snd_soc_tplg_link_config *link;
	struct tplg_elem *elem;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val = NULL;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_CC);
	if (!elem)
		return -ENOMEM;

	link = elem->link;
	link->size = elem->size;

	tplg_dbg(" CC: %s\n", elem->id);

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);
		if (snd_config_get_id(n, &id) < 0)
			continue;

		/* skip comments */
		if (strcmp(id, "comment") == 0)
			continue;
		if (id[0] == '#')
			continue;

		if (strcmp(id, "id") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			link->id = atoi(val);
			tplg_dbg("\t%s: %d\n", id, link->id);
			continue;
		}

	}

	return 0;
}

static int get_audio_hw_format(const char *val)
{
	if (!strlen(val))
		return -EINVAL;

	if (!strcmp(val, "I2S"))
		return SND_SOC_DAI_FORMAT_I2S;

	if (!strcmp(val, "RIGHT_J"))
		return SND_SOC_DAI_FORMAT_RIGHT_J;

	if (!strcmp(val, "LEFT_J"))
		return SND_SOC_DAI_FORMAT_LEFT_J;

	if (!strcmp(val, "DSP_A"))
		return SND_SOC_DAI_FORMAT_DSP_A;

	if (!strcmp(val, "DSP_B"))
		return SND_SOC_DAI_FORMAT_DSP_B;

	if (!strcmp(val, "AC97"))
		return SND_SOC_DAI_FORMAT_AC97;

	if (!strcmp(val, "PDM"))
		return SND_SOC_DAI_FORMAT_PDM;

	SNDERR("error: invalid audio HW format %s\n", val);
	return -EINVAL;
}

int tplg_parse_hw_config(snd_tplg_t *tplg, snd_config_t *cfg,
			 void *private ATTRIBUTE_UNUSED)
{

	struct snd_soc_tplg_hw_config *hw_cfg;
	struct tplg_elem *elem;
	snd_config_iterator_t i, next;
	snd_config_t *n;
	const char *id, *val = NULL;
	int ret;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_HW_CONFIG);
	if (!elem)
		return -ENOMEM;

	hw_cfg = elem->hw_cfg;
	hw_cfg->size = elem->size;

	tplg_dbg(" Link HW config: %s\n", elem->id);

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);
		if (snd_config_get_id(n, &id) < 0)
			continue;

		/* skip comments */
		if (strcmp(id, "comment") == 0)
			continue;
		if (id[0] == '#')
			continue;

		if (strcmp(id, "id") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->id = atoi(val);
			tplg_dbg("\t%s: %d\n", id, hw_cfg->id);
			continue;
		}

		if (strcmp(id, "format") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			ret = get_audio_hw_format(val);
			if (ret < 0)
				return ret;
			hw_cfg->fmt = ret;
			continue;
		}

		if (strcmp(id, "bclk") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (!strcmp(val, "master"))
				hw_cfg->bclk_master = true;
			continue;
		}

		if (strcmp(id, "bclk_freq") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->bclk_rate = atoi(val);
			continue;
		}

		if (strcmp(id, "bclk_invert") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (!strcmp(val, "true"))
				hw_cfg->invert_bclk = true;
			continue;
		}

		if (strcmp(id, "fsync") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (!strcmp(val, "master"))
				hw_cfg->fsync_master = true;
			continue;
		}

		if (strcmp(id, "fsync_invert") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (!strcmp(val, "true"))
				hw_cfg->invert_fsync = true;
			continue;
		}

		if (strcmp(id, "fsync_freq") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->fsync_rate = atoi(val);
			continue;
		}

		if (strcmp(id, "mclk_freq") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->mclk_rate = atoi(val);
			continue;
		}

		if (strcmp(id, "mclk") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (!strcmp(val, "master"))
				hw_cfg->mclk_direction = true;
			continue;
		}

		if (strcmp(id, "pm_gate_clocks") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			if (!strcmp(val, "true"))
				hw_cfg->clock_gated = true;
			continue;
		}

		if (strcmp(id, "tdm_slots") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->tdm_slots = atoi(val);
			continue;
		}

		if (strcmp(id, "tdm_slot_width") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->tdm_slot_width = atoi(val);
			continue;
		}

		if (strcmp(id, "tx_slots") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->tx_slots = atoi(val);
			continue;
		}

		if (strcmp(id, "rx_slots") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->rx_slots = atoi(val);
			continue;
		}

		if (strcmp(id, "tx_channels") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->tx_channels = atoi(val);
			continue;
		}

		if (strcmp(id, "rx_channels") == 0) {
			if (snd_config_get_string(n, &val) < 0)
				return -EINVAL;

			hw_cfg->rx_channels = atoi(val);
			continue;
		}

	}

	return 0;
}

/* copy stream object */
static void tplg_add_stream_object(struct snd_soc_tplg_stream *strm,
				struct snd_tplg_stream_template *strm_tpl)
{
	elem_copy_text(strm->name, strm_tpl->name,
		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
	strm->format = strm_tpl->format;
	strm->rate = strm_tpl->rate;
	strm->period_bytes = strm_tpl->period_bytes;
	strm->buffer_bytes = strm_tpl->buffer_bytes;
	strm->channels = strm_tpl->channels;
}

static void tplg_add_stream_caps(struct snd_soc_tplg_stream_caps *caps,
	struct snd_tplg_stream_caps_template *caps_tpl)
{
	elem_copy_text(caps->name, caps_tpl->name,
		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	caps->formats = caps_tpl->formats;
	caps->rates = caps_tpl->rates;
	caps->rate_min = caps_tpl->rate_min;
	caps->rate_max = caps_tpl->rate_max;
	caps->channels_min = caps_tpl->channels_min;
	caps->channels_max = caps_tpl->channels_max;
	caps->periods_min = caps_tpl->periods_min;
	caps->periods_max = caps_tpl->periods_max;
	caps->period_size_min = caps_tpl->period_size_min;
	caps->period_size_max = caps_tpl->period_size_max;
	caps->buffer_size_min = caps_tpl->buffer_size_min;
	caps->buffer_size_max = caps_tpl->buffer_size_max;
	caps->sig_bits = caps_tpl->sig_bits;
}

/* Add a PCM element (FE DAI & DAI link) from C API */
int tplg_add_pcm_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
{
	struct snd_tplg_pcm_template *pcm_tpl = t->pcm;
	struct snd_soc_tplg_pcm *pcm, *_pcm;
	struct tplg_elem *elem;
	int i;

	tplg_dbg("PCM: %s, DAI %s\n", pcm_tpl->pcm_name, pcm_tpl->dai_name);

	if (pcm_tpl->num_streams > SND_SOC_TPLG_STREAM_CONFIG_MAX)
		return -EINVAL;

	elem = tplg_elem_new_common(tplg, NULL, pcm_tpl->pcm_name,
		SND_TPLG_TYPE_PCM);
	if (!elem)
		return -ENOMEM;

	pcm = elem->pcm;
	pcm->size = elem->size;

	elem_copy_text(pcm->pcm_name, pcm_tpl->pcm_name,
		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
	elem_copy_text(pcm->dai_name, pcm_tpl->dai_name,
		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
	pcm->pcm_id = pcm_tpl->pcm_id;
	pcm->dai_id = pcm_tpl->dai_id;
	pcm->playback = pcm_tpl->playback;
	pcm->capture = pcm_tpl->capture;
	pcm->compress = pcm_tpl->compress;

	for (i = 0; i < 2; i++) {
		if (pcm_tpl->caps[i])
			tplg_add_stream_caps(&pcm->caps[i], pcm_tpl->caps[i]);
	}

	pcm->flag_mask = pcm_tpl->flag_mask;
	pcm->flags = pcm_tpl->flags;

	pcm->num_streams = pcm_tpl->num_streams;
	for (i = 0; i < pcm_tpl->num_streams; i++)
		tplg_add_stream_object(&pcm->stream[i], &pcm_tpl->stream[i]);

	/* private data */
	if (pcm_tpl->priv != NULL && pcm_tpl->priv->size) {
		tplg_dbg("\t priv data size %d\n", pcm_tpl->priv->size);
		_pcm = realloc(pcm,
			elem->size + pcm_tpl->priv->size);
		if (!_pcm) {
			tplg_elem_free(elem);
			return -ENOMEM;
		}

		pcm = _pcm;
		elem->pcm = pcm;
		elem->size += pcm_tpl->priv->size;

		memcpy(pcm->priv.data, pcm_tpl->priv->data,
			pcm_tpl->priv->size);
		pcm->priv.size = pcm_tpl->priv->size;
	}

	return 0;
}

/* Set link HW config from C API template */
static int set_link_hw_config(struct snd_soc_tplg_hw_config *cfg,
			struct snd_tplg_hw_config_template *tpl)
{
	int i;

	cfg->size = sizeof(*cfg);
	cfg->id = tpl->id;

	cfg->fmt = tpl->fmt;
	cfg->clock_gated = tpl->clock_gated;
	cfg->invert_bclk = tpl->invert_bclk;
	cfg->invert_fsync = tpl->invert_fsync;
	cfg->bclk_master = tpl->bclk_master;
	cfg->fsync_master = tpl->fsync_master;
	cfg->mclk_direction = tpl->mclk_direction;
	cfg->reserved = tpl->reserved;
	cfg->mclk_rate = tpl->mclk_rate;
	cfg->bclk_rate = tpl->bclk_rate;
	cfg->fsync_rate = tpl->fsync_rate;

	cfg->tdm_slots = tpl->tdm_slots;
	cfg->tdm_slot_width = tpl->tdm_slot_width;
	cfg->tx_slots = tpl->tx_slots;
	cfg->rx_slots = tpl->rx_slots;

	if (cfg->tx_channels > SND_SOC_TPLG_MAX_CHAN
		|| cfg->rx_channels > SND_SOC_TPLG_MAX_CHAN)
		return -EINVAL;

	cfg->tx_channels = tpl->tx_channels;
	for (i = 0; i < cfg->tx_channels; i++)
		cfg->tx_chanmap[i] = tpl->tx_chanmap[i];

	cfg->rx_channels = tpl->rx_channels;
	for (i = 0; i < cfg->rx_channels; i++)
		cfg->rx_chanmap[i] = tpl->rx_chanmap[i];

	return 0;
}

/* Add a physical DAI link element from C API */
int tplg_add_link_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
{
	struct snd_tplg_link_template *link_tpl = t->link;
	struct snd_soc_tplg_link_config *link, *_link;
	struct tplg_elem *elem;
	int i;

	if (t->type != SND_TPLG_TYPE_LINK && t->type != SND_TPLG_TYPE_BE
	    && t->type != SND_TPLG_TYPE_CC)
		return -EINVAL;

	elem = tplg_elem_new_common(tplg, NULL, link_tpl->name, t->type);
	if (!elem)
		return -ENOMEM;

	tplg_dbg("Link: %s", link_tpl->name);

	link = elem->link;
	link->size = elem->size;

	/* ID and names */
	link->id = link_tpl->id;
	elem_copy_text(link->name, link_tpl->name,
		       SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
	elem_copy_text(link->stream_name, link_tpl->stream_name,
		       SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	/* stream configs */
	if (link_tpl->num_streams > SND_SOC_TPLG_STREAM_CONFIG_MAX)
		return -EINVAL;
	link->num_streams = link_tpl->num_streams;
	for (i = 0; i < link->num_streams; i++)
		tplg_add_stream_object(&link->stream[i], &link_tpl->stream[i]);

	/* HW configs */
	if (link_tpl->num_hw_configs > SND_SOC_TPLG_HW_CONFIG_MAX)
		return -EINVAL;
	link->num_hw_configs = link_tpl->num_hw_configs;
	link->default_hw_config_id = link_tpl->default_hw_config_id;
	for (i = 0; i < link->num_hw_configs; i++)
		set_link_hw_config(&link->hw_config[i], &link_tpl->hw_config[i]);

	/* flags */
	link->flag_mask = link_tpl->flag_mask;
	link->flags = link_tpl->flags;

	/* private data */
	if (link_tpl->priv != NULL && link_tpl->priv->size) {
		_link = realloc(link,
			elem->size + link_tpl->priv->size);
		if (!_link) {
			tplg_elem_free(elem);
			return -ENOMEM;
		}

		link = _link;
		elem->link = link;
		elem->size += link_tpl->priv->size;

		memcpy(link->priv.data, link_tpl->priv->data,
			link_tpl->priv->size);
		link->priv.size = link_tpl->priv->size;
	}

	return 0;
}

int tplg_add_dai_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)
{
	struct snd_tplg_dai_template *dai_tpl = t->dai;
	struct snd_soc_tplg_dai *dai, *_dai;
	struct tplg_elem *elem;
	int i;

	tplg_dbg("DAI %s\n", dai_tpl->dai_name);

	elem = tplg_elem_new_common(tplg, NULL, dai_tpl->dai_name,
		SND_TPLG_TYPE_DAI);
	if (!elem)
		return -ENOMEM;

	dai = elem->dai;
	dai->size = elem->size;

	elem_copy_text(dai->dai_name, dai_tpl->dai_name,
		SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
	dai->dai_id = dai_tpl->dai_id;

	/* stream caps */
	dai->playback = dai_tpl->playback;
	dai->capture = dai_tpl->capture;

	for (i = 0; i < 2; i++) {
		if (dai_tpl->caps[i])
			tplg_add_stream_caps(&dai->caps[i], dai_tpl->caps[i]);
	}

	/* flags */
	dai->flag_mask = dai_tpl->flag_mask;
	dai->flags = dai_tpl->flags;

	/* private data */
	if (dai_tpl->priv != NULL) {
		_dai = realloc(dai,
			elem->size + dai_tpl->priv->size);
		if (!_dai) {
			tplg_elem_free(elem);
			return -ENOMEM;
		}

		dai = _dai;
		dai->priv.size = dai_tpl->priv->size;

		elem->dai = dai;
		elem->size += dai->priv.size;
		memcpy(dai->priv.data, dai_tpl->priv->data,
		       dai->priv.size);
	}

	return 0;
}
