text: // SPDX-License-Identifier: GPL-2.0+
  //
  // soc-topology.c  --  ALSA SoC Topology
  //
  // Copyright (C) 2012 Texas Instruments Inc.
  // Copyright (C) 2015 Intel Corporation.
  //
  // Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
  //		K, Mythri P <mythri.p.k@intel.com>
  //		Prusty, Subhransu S <subhransu.s.prusty@intel.com>
  //		B, Jayachandran <jayachandran.b@intel.com>
  //		Abdullah, Omair M <omair.m.abdullah@intel.com>
  //		Jin, Yao <yao.jin@intel.com>
  //		Lin, Mengdong <mengdong.lin@intel.com>
  //
  //  Add support to read audio firmware topology alongside firmware text. The
  //  topology data can contain kcontrols, DAPM graphs, widgets, DAIs, DAI links,
  //  equalizers, firmware, coefficients etc.
  //
  //  This file only manages the core ALSA and ASoC components, all other bespoke
  //  firmware topology data is passed to component drivers for bespoke handling.
  
  #include <linux/kernel.h>
  #include <linux/export.h>
  #include <linux/list.h>
  #include <linux/firmware.h>
  #include <linux/slab.h>
  #include <sound/soc.h>
  #include <sound/soc-dapm.h>
  #include <sound/soc-topology.h>
  #include <sound/tlv.h>
  
  /*
   * We make several passes over the data (since it wont necessarily be ordered)
   * and process objects in the following order. This guarantees the component
   * drivers will be ready with any vendor data before the mixers and DAPM objects
   * are loaded (that may make use of the vendor data).
   */
  #define SOC_TPLG_PASS_MANIFEST		0
  #define SOC_TPLG_PASS_VENDOR		1
  #define SOC_TPLG_PASS_MIXER		2
  #define SOC_TPLG_PASS_WIDGET		3
  #define SOC_TPLG_PASS_PCM_DAI		4
  #define SOC_TPLG_PASS_GRAPH		5
  #define SOC_TPLG_PASS_PINS		6
  #define SOC_TPLG_PASS_BE_DAI		7
  #define SOC_TPLG_PASS_LINK		8
  
  #define SOC_TPLG_PASS_START	SOC_TPLG_PASS_MANIFEST
  #define SOC_TPLG_PASS_END	SOC_TPLG_PASS_LINK
  
  /* topology context */
  struct soc_tplg {
  	const struct firmware *fw;
  
  	/* runtime FW parsing */
  	const u8 *pos;		/* read postion */
  	const u8 *hdr_pos;	/* header position */
  	unsigned int pass;	/* pass number */
  
  	/* component caller */
  	struct device *dev;
  	struct snd_soc_component *comp;
  	u32 index;	/* current block index */
  	u32 req_index;	/* required index, only loaded/free matching blocks */
  
  	/* vendor specific kcontrol operations */
  	const struct snd_soc_tplg_kcontrol_ops *io_ops;
  	int io_ops_count;
  
  	/* vendor specific bytes ext handlers, for TLV bytes controls */
  	const struct snd_soc_tplg_bytes_ext_ops *bytes_ext_ops;
  	int bytes_ext_ops_count;
  
  	/* optional fw loading callbacks to component drivers */
  	struct snd_soc_tplg_ops *ops;
  };
  
  static int soc_tplg_process_headers(struct soc_tplg *tplg);
  static void soc_tplg_complete(struct soc_tplg *tplg);
  struct snd_soc_dapm_widget *
  snd_soc_dapm_new_control_unlocked(struct snd_soc_dapm_context *dapm,
  			 const struct snd_soc_dapm_widget *widget);
  struct snd_soc_dapm_widget *
  snd_soc_dapm_new_control(struct snd_soc_dapm_context *dapm,
  			 const struct snd_soc_dapm_widget *widget);
  
  /* check we dont overflow the data for this control chunk */
  static int soc_tplg_check_elem_count(struct soc_tplg *tplg, size_t elem_size,
  	unsigned int count, size_t bytes, const char *elem_type)
  {
  	const u8 *end = tplg->pos + elem_size * count;
  
  	if (end > tplg->fw->data + tplg->fw->size) {
  		dev_err(tplg->dev, "ASoC: %s overflow end of data\n",
  			elem_type);
  		return -EINVAL;
  	}
  
  	/* check there is enough room in chunk for control.
  	   extra bytes at the end of control are for vendor data here  */
  	if (elem_size * count > bytes) {
  		dev_err(tplg->dev,
  			"ASoC: %s count %d of size %zu is bigger than chunk %zu\n",
  			elem_type, count, elem_size, bytes);
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  static inline int soc_tplg_is_eof(struct soc_tplg *tplg)
  {
  	const u8 *end = tplg->hdr_pos;
  
  	if (end >= tplg->fw->data + tplg->fw->size)
  		return 1;
  	return 0;
  }
  
  static inline unsigned long soc_tplg_get_hdr_offset(struct soc_tplg *tplg)
  {
  	return (unsigned long)(tplg->hdr_pos - tplg->fw->data);
  }
  
  static inline unsigned long soc_tplg_get_offset(struct soc_tplg *tplg)
  {
  	return (unsigned long)(tplg->pos - tplg->fw->data);
  }
  
  /* mapping of Kcontrol types and associated operations. */
  static const struct snd_soc_tplg_kcontrol_ops io_ops[] = {
  	{SND_SOC_TPLG_CTL_VOLSW, snd_soc_get_volsw,
  		snd_soc_put_volsw, snd_soc_info_volsw},
  	{SND_SOC_TPLG_CTL_VOLSW_SX, snd_soc_get_volsw_sx,
  		snd_soc_put_volsw_sx, NULL},
  	{SND_SOC_TPLG_CTL_ENUM, snd_soc_get_enum_double,
  		snd_soc_put_enum_double, snd_soc_info_enum_double},
  	{SND_SOC_TPLG_CTL_ENUM_VALUE, snd_soc_get_enum_double,
  		snd_soc_put_enum_double, NULL},
  	{SND_SOC_TPLG_CTL_BYTES, snd_soc_bytes_get,
  		snd_soc_bytes_put, snd_soc_bytes_info},
  	{SND_SOC_TPLG_CTL_RANGE, snd_soc_get_volsw_range,
  		snd_soc_put_volsw_range, snd_soc_info_volsw_range},
  	{SND_SOC_TPLG_CTL_VOLSW_XR_SX, snd_soc_get_xr_sx,
  		snd_soc_put_xr_sx, snd_soc_info_xr_sx},
  	{SND_SOC_TPLG_CTL_STROBE, snd_soc_get_strobe,
  		snd_soc_put_strobe, NULL},
  	{SND_SOC_TPLG_DAPM_CTL_VOLSW, snd_soc_dapm_get_volsw,
  		snd_soc_dapm_put_volsw, snd_soc_info_volsw},
  	{SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE, snd_soc_dapm_get_enum_double,
  		snd_soc_dapm_put_enum_double, snd_soc_info_enum_double},
  	{SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT, snd_soc_dapm_get_enum_double,
  		snd_soc_dapm_put_enum_double, NULL},
  	{SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE, snd_soc_dapm_get_enum_double,
  		snd_soc_dapm_put_enum_double, NULL},
  	{SND_SOC_TPLG_DAPM_CTL_PIN, snd_soc_dapm_get_pin_switch,
  		snd_soc_dapm_put_pin_switch, snd_soc_dapm_info_pin_switch},
  };
  
  struct soc_tplg_map {
  	int uid;
  	int kid;
  };
  
  /* mapping of widget types from UAPI IDs to kernel IDs */
  static const struct soc_tplg_map dapm_map[] = {
  	{SND_SOC_TPLG_DAPM_INPUT, snd_soc_dapm_input},
  	{SND_SOC_TPLG_DAPM_OUTPUT, snd_soc_dapm_output},
  	{SND_SOC_TPLG_DAPM_MUX, snd_soc_dapm_mux},
  	{SND_SOC_TPLG_DAPM_MIXER, snd_soc_dapm_mixer},
  	{SND_SOC_TPLG_DAPM_PGA, snd_soc_dapm_pga},
  	{SND_SOC_TPLG_DAPM_OUT_DRV, snd_soc_dapm_out_drv},
  	{SND_SOC_TPLG_DAPM_ADC, snd_soc_dapm_adc},
  	{SND_SOC_TPLG_DAPM_DAC, snd_soc_dapm_dac},
  	{SND_SOC_TPLG_DAPM_SWITCH, snd_soc_dapm_switch},
  	{SND_SOC_TPLG_DAPM_PRE, snd_soc_dapm_pre},
  	{SND_SOC_TPLG_DAPM_POST, snd_soc_dapm_post},
  	{SND_SOC_TPLG_DAPM_AIF_IN, snd_soc_dapm_aif_in},
  	{SND_SOC_TPLG_DAPM_AIF_OUT, snd_soc_dapm_aif_out},
  	{SND_SOC_TPLG_DAPM_DAI_IN, snd_soc_dapm_dai_in},
  	{SND_SOC_TPLG_DAPM_DAI_OUT, snd_soc_dapm_dai_out},
  	{SND_SOC_TPLG_DAPM_DAI_LINK, snd_soc_dapm_dai_link},
  	{SND_SOC_TPLG_DAPM_BUFFER, snd_soc_dapm_buffer},
  	{SND_SOC_TPLG_DAPM_SCHEDULER, snd_soc_dapm_scheduler},
  	{SND_SOC_TPLG_DAPM_EFFECT, snd_soc_dapm_effect},
  	{SND_SOC_TPLG_DAPM_SIGGEN, snd_soc_dapm_siggen},
  	{SND_SOC_TPLG_DAPM_SRC, snd_soc_dapm_src},
  	{SND_SOC_TPLG_DAPM_ASRC, snd_soc_dapm_asrc},
  	{SND_SOC_TPLG_DAPM_ENCODER, snd_soc_dapm_encoder},
  	{SND_SOC_TPLG_DAPM_DECODER, snd_soc_dapm_decoder},
  };
  
  static int tplc_chan_get_reg(struct soc_tplg *tplg,
  	struct snd_soc_tplg_channel *chan, int map)
  {
  	int i;
  
  	for (i = 0; i < SND_SOC_TPLG_MAX_CHAN; i++) {
  		if (chan[i].id == map)
  			return chan[i].reg;
  	}
  
  	return -EINVAL;
  }
  
  static int tplc_chan_get_shift(struct soc_tplg *tplg,
  	struct snd_soc_tplg_channel *chan, int map)
  {
  	int i;
  
  	for (i = 0; i < SND_SOC_TPLG_MAX_CHAN; i++) {
  		if (chan[i].id == map)
  			return chan[i].shift;
  	}
  
  	return -EINVAL;
  }
  
  static int get_widget_id(int tplg_type)
  {
  	int i;
  
  	for (i = 0; i < ARRAY_SIZE(dapm_map); i++) {
  		if (tplg_type == dapm_map[i].uid)
  			return dapm_map[i].kid;
  	}
  
  	return -EINVAL;
  }
  
  static inline void soc_bind_err(struct soc_tplg *tplg,
  	struct snd_soc_tplg_ctl_hdr *hdr, int index)
  {
  	dev_err(tplg->dev,
  		"ASoC: invalid control type (g,p,i) %d:%d:%d index %d at 0x%lx\n",
  		hdr->ops.get, hdr->ops.put, hdr->ops.info, index,
  		soc_tplg_get_offset(tplg));
  }
  
  static inline void soc_control_err(struct soc_tplg *tplg,
  	struct snd_soc_tplg_ctl_hdr *hdr, const char *name)
  {
  	dev_err(tplg->dev,
  		"ASoC: no complete mixer IO handler for %s type (g,p,i) %d:%d:%d at 0x%lx\n",
  		name, hdr->ops.get, hdr->ops.put, hdr->ops.info,
  		soc_tplg_get_offset(tplg));
  }
  
  /* pass vendor data to component driver for processing */
  static int soc_tplg_vendor_load_(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	int ret = 0;
  
  	if (tplg->comp && tplg->ops && tplg->ops->vendor_load)
  		ret = tplg->ops->vendor_load(tplg->comp, tplg->index, hdr);
  	else {
  		dev_err(tplg->dev, "ASoC: no vendor load callback for ID %d\n",
  			hdr->vendor_type);
  		return -EINVAL;
  	}
  
  	if (ret < 0)
  		dev_err(tplg->dev,
  			"ASoC: vendor load failed at hdr offset %ld/0x%lx for type %d:%d\n",
  			soc_tplg_get_hdr_offset(tplg),
  			soc_tplg_get_hdr_offset(tplg),
  			hdr->type, hdr->vendor_type);
  	return ret;
  }
  
  /* pass vendor data to component driver for processing */
  static int soc_tplg_vendor_load(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	if (tplg->pass != SOC_TPLG_PASS_VENDOR)
  		return 0;
  
  	return soc_tplg_vendor_load_(tplg, hdr);
  }
  
  /* optionally pass new dynamic widget to component driver. This is mainly for
   * external widgets where we can assign private data/ops */
  static int soc_tplg_widget_load(struct soc_tplg *tplg,
  	struct snd_soc_dapm_widget *w, struct snd_soc_tplg_dapm_widget *tplg_w)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->widget_load)
  		return tplg->ops->widget_load(tplg->comp, tplg->index, w,
  			tplg_w);
  
  	return 0;
  }
  
  /* optionally pass new dynamic widget to component driver. This is mainly for
   * external widgets where we can assign private data/ops */
  static int soc_tplg_widget_ready(struct soc_tplg *tplg,
  	struct snd_soc_dapm_widget *w, struct snd_soc_tplg_dapm_widget *tplg_w)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->widget_ready)
  		return tplg->ops->widget_ready(tplg->comp, tplg->index, w,
  			tplg_w);
  
  	return 0;
  }
  
  /* pass DAI configurations to component driver for extra initialization */
  static int soc_tplg_dai_load(struct soc_tplg *tplg,
  	struct snd_soc_dai_driver *dai_drv,
  	struct snd_soc_tplg_pcm *pcm, struct snd_soc_dai *dai)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->dai_load)
  		return tplg->ops->dai_load(tplg->comp, tplg->index, dai_drv,
  			pcm, dai);
  
  	return 0;
  }
  
  /* pass link configurations to component driver for extra initialization */
  static int soc_tplg_dai_link_load(struct soc_tplg *tplg,
  	struct snd_soc_dai_link *link, struct snd_soc_tplg_link_config *cfg)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->link_load)
  		return tplg->ops->link_load(tplg->comp, tplg->index, link, cfg);
  
  	return 0;
  }
  
  /* tell the component driver that all firmware has been loaded in this request */
  static void soc_tplg_complete(struct soc_tplg *tplg)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->complete)
  		tplg->ops->complete(tplg->comp);
  }
  
  /* add a dynamic kcontrol */
  static int soc_tplg_add_dcontrol(struct snd_card *card, struct device *dev,
  	const struct snd_kcontrol_new *control_new, const char *prefix,
  	void *data, struct snd_kcontrol **kcontrol)
  {
  	int err;
  
  	*kcontrol = snd_soc_cnew(control_new, data, control_new->name, prefix);
  	if (*kcontrol == NULL) {
  		dev_err(dev, "ASoC: Failed to create new kcontrol %s\n",
  		control_new->name);
  		return -ENOMEM;
  	}
  
  	err = snd_ctl_add(card, *kcontrol);
  	if (err < 0) {
  		dev_err(dev, "ASoC: Failed to add %s: %d\n",
  			control_new->name, err);
  		return err;
  	}
  
  	return 0;
  }
  
  /* add a dynamic kcontrol for component driver */
  static int soc_tplg_add_kcontrol(struct soc_tplg *tplg,
  	struct snd_kcontrol_new *k, struct snd_kcontrol **kcontrol)
  {
  	struct snd_soc_component *comp = tplg->comp;
  
  	return soc_tplg_add_dcontrol(comp->card->snd_card,
  				comp->dev, k, NULL, comp, kcontrol);
  }
  
  /* remove a mixer kcontrol */
  static void remove_mixer(struct snd_soc_component *comp,
  	struct snd_soc_dobj *dobj, int pass)
  {
  	struct snd_card *card = comp->card->snd_card;
  	struct soc_mixer_control *sm =
  		container_of(dobj, struct soc_mixer_control, dobj);
  	const unsigned int *p = NULL;
  
  	if (pass != SOC_TPLG_PASS_MIXER)
  		return;
  
  	if (dobj->ops && dobj->ops->control_unload)
  		dobj->ops->control_unload(comp, dobj);
  
  	if (sm->dobj.control.kcontrol->tlv.p)
  		p = sm->dobj.control.kcontrol->tlv.p;
  	snd_ctl_remove(card, sm->dobj.control.kcontrol);
  	list_del(&sm->dobj.list);
  	kfree(sm);
  	kfree(p);
  }
  
  /* remove an enum kcontrol */
  static void remove_enum(struct snd_soc_component *comp,
  	struct snd_soc_dobj *dobj, int pass)
  {
  	struct snd_card *card = comp->card->snd_card;
  	struct soc_enum *se = container_of(dobj, struct soc_enum, dobj);
  	int i;
  
  	if (pass != SOC_TPLG_PASS_MIXER)
  		return;
  
  	if (dobj->ops && dobj->ops->control_unload)
  		dobj->ops->control_unload(comp, dobj);
  
  	snd_ctl_remove(card, se->dobj.control.kcontrol);
  	list_del(&se->dobj.list);
  
  	kfree(se->dobj.control.dvalues);
  	for (i = 0; i < se->items; i++)
  		kfree(se->dobj.control.dtexts[i]);
  	kfree(se);
  }
  
  /* remove a byte kcontrol */
  static void remove_bytes(struct snd_soc_component *comp,
  	struct snd_soc_dobj *dobj, int pass)
  {
  	struct snd_card *card = comp->card->snd_card;
  	struct soc_bytes_ext *sb =
  		container_of(dobj, struct soc_bytes_ext, dobj);
  
  	if (pass != SOC_TPLG_PASS_MIXER)
  		return;
  
  	if (dobj->ops && dobj->ops->control_unload)
  		dobj->ops->control_unload(comp, dobj);
  
  	snd_ctl_remove(card, sb->dobj.control.kcontrol);
  	list_del(&sb->dobj.list);
  	kfree(sb);
  }
  
  /* remove a widget and it's kcontrols - routes must be removed first */
  static void remove_widget(struct snd_soc_component *comp,
  	struct snd_soc_dobj *dobj, int pass)
  {
  	struct snd_card *card = comp->card->snd_card;
  	struct snd_soc_dapm_widget *w =
  		container_of(dobj, struct snd_soc_dapm_widget, dobj);
  	int i;
  
  	if (pass != SOC_TPLG_PASS_WIDGET)
  		return;
  
  	if (dobj->ops && dobj->ops->widget_unload)
  		dobj->ops->widget_unload(comp, dobj);
  
  	if (!w->kcontrols)
  		goto free_news;
  
  	/*
  	 * Dynamic Widgets either have 1..N enum kcontrols or mixers.
  	 * The enum may either have an array of values or strings.
  	 */
  	if (dobj->widget.kcontrol_type == SND_SOC_TPLG_TYPE_ENUM) {
  		/* enumerated widget mixer */
  		for (i = 0; w->kcontrols != NULL && i < w->num_kcontrols; i++) {
  			struct snd_kcontrol *kcontrol = w->kcontrols[i];
  			struct soc_enum *se =
  				(struct soc_enum *)kcontrol->private_value;
  			int j;
  
  			snd_ctl_remove(card, kcontrol);
  
  			kfree(se->dobj.control.dvalues);
  			for (j = 0; j < se->items; j++)
  				kfree(se->dobj.control.dtexts[j]);
  
  			kfree(se);
  			kfree(w->kcontrol_news[i].name);
  		}
  	} else {
  		/* volume mixer or bytes controls */
  		for (i = 0; w->kcontrols != NULL && i < w->num_kcontrols; i++) {
  			struct snd_kcontrol *kcontrol = w->kcontrols[i];
  
  			if (dobj->widget.kcontrol_type
  			    == SND_SOC_TPLG_TYPE_MIXER)
  				kfree(kcontrol->tlv.p);
  
  			/* Private value is used as struct soc_mixer_control
  			 * for volume mixers or soc_bytes_ext for bytes
  			 * controls.
  			 */
  			kfree((void *)kcontrol->private_value);
  			snd_ctl_remove(card, kcontrol);
  			kfree(w->kcontrol_news[i].name);
  		}
  	}
  
  free_news:
  	kfree(w->kcontrol_news);
  
  	/* widget w is freed by soc-dapm.c */
  }
  
  /* remove DAI configurations */
  static void remove_dai(struct snd_soc_component *comp,
  	struct snd_soc_dobj *dobj, int pass)
  {
  	struct snd_soc_dai_driver *dai_drv =
  		container_of(dobj, struct snd_soc_dai_driver, dobj);
  
  	if (pass != SOC_TPLG_PASS_PCM_DAI)
  		return;
  
  	if (dobj->ops && dobj->ops->dai_unload)
  		dobj->ops->dai_unload(comp, dobj);
  
  	kfree(dai_drv->name);
  	list_del(&dobj->list);
  	kfree(dai_drv);
  }
  
  /* remove link configurations */
  static void remove_link(struct snd_soc_component *comp,
  	struct snd_soc_dobj *dobj, int pass)
  {
  	struct snd_soc_dai_link *link =
  		container_of(dobj, struct snd_soc_dai_link, dobj);
  
  	if (pass != SOC_TPLG_PASS_PCM_DAI)
  		return;
  
  	if (dobj->ops && dobj->ops->link_unload)
  		dobj->ops->link_unload(comp, dobj);
  
  	kfree(link->name);
  	kfree(link->stream_name);
  	kfree(link->cpu_dai_name);
  
  	list_del(&dobj->list);
  	snd_soc_remove_dai_link(comp->card, link);
  	kfree(link);
  }
  
  /* bind a kcontrol to it's IO handlers */
  static int soc_tplg_kcontrol_bind_io(struct snd_soc_tplg_ctl_hdr *hdr,
  	struct snd_kcontrol_new *k,
  	const struct soc_tplg *tplg)
  {
  	const struct snd_soc_tplg_kcontrol_ops *ops;
  	const struct snd_soc_tplg_bytes_ext_ops *ext_ops;
  	int num_ops, i;
  
  	if (hdr->ops.info == SND_SOC_TPLG_CTL_BYTES
  		&& k->iface & SNDRV_CTL_ELEM_IFACE_MIXER
  		&& k->access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE
  		&& k->access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK) {
  		struct soc_bytes_ext *sbe;
  		struct snd_soc_tplg_bytes_control *be;
  
  		sbe = (struct soc_bytes_ext *)k->private_value;
  		be = container_of(hdr, struct snd_soc_tplg_bytes_control, hdr);
  
  		/* TLV bytes controls need standard kcontrol info handler,
  		 * TLV callback and extended put/get handlers.
  		 */
  		k->info = snd_soc_bytes_info_ext;
  		k->tlv.c = snd_soc_bytes_tlv_callback;
  
  		ext_ops = tplg->bytes_ext_ops;
  		num_ops = tplg->bytes_ext_ops_count;
  		for (i = 0; i < num_ops; i++) {
  			if (!sbe->put && ext_ops[i].id == be->ext_ops.put)
  				sbe->put = ext_ops[i].put;
  			if (!sbe->get && ext_ops[i].id == be->ext_ops.get)
  				sbe->get = ext_ops[i].get;
  		}
  
  		if (sbe->put && sbe->get)
  			return 0;
  		else
  			return -EINVAL;
  	}
  
  	/* try and map vendor specific kcontrol handlers first */
  	ops = tplg->io_ops;
  	num_ops = tplg->io_ops_count;
  	for (i = 0; i < num_ops; i++) {
  
  		if (k->put == NULL && ops[i].id == hdr->ops.put)
  			k->put = ops[i].put;
  		if (k->get == NULL && ops[i].id == hdr->ops.get)
  			k->get = ops[i].get;
  		if (k->info == NULL && ops[i].id == hdr->ops.info)
  			k->info = ops[i].info;
  	}
  
  	/* vendor specific handlers found ? */
  	if (k->put && k->get && k->info)
  		return 0;
  
  	/* none found so try standard kcontrol handlers */
  	ops = io_ops;
  	num_ops = ARRAY_SIZE(io_ops);
  	for (i = 0; i < num_ops; i++) {
  
  		if (k->put == NULL && ops[i].id == hdr->ops.put)
  			k->put = ops[i].put;
  		if (k->get == NULL && ops[i].id == hdr->ops.get)
  			k->get = ops[i].get;
  		if (k->info == NULL && ops[i].id == hdr->ops.info)
  			k->info = ops[i].info;
  	}
  
  	/* standard handlers found ? */
  	if (k->put && k->get && k->info)
  		return 0;
  
  	/* nothing to bind */
  	return -EINVAL;
  }
  
  /* bind a widgets to it's evnt handlers */
  int snd_soc_tplg_widget_bind_event(struct snd_soc_dapm_widget *w,
  		const struct snd_soc_tplg_widget_events *events,
  		int num_events, u16 event_type)
  {
  	int i;
  
  	w->event = NULL;
  
  	for (i = 0; i < num_events; i++) {
  		if (event_type == events[i].type) {
  
  			/* found - so assign event */
  			w->event = events[i].event_handler;
  			return 0;
  		}
  	}
  
  	/* not found */
  	return -EINVAL;
  }
  EXPORT_SYMBOL_GPL(snd_soc_tplg_widget_bind_event);
  
  /* optionally pass new dynamic kcontrol to component driver. */
  static int soc_tplg_init_kcontrol(struct soc_tplg *tplg,
  	struct snd_kcontrol_new *k, struct snd_soc_tplg_ctl_hdr *hdr)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->control_load)
  		return tplg->ops->control_load(tplg->comp, tplg->index, k,
  			hdr);
  
  	return 0;
  }
  
  
  static int soc_tplg_create_tlv_db_scale(struct soc_tplg *tplg,
  	struct snd_kcontrol_new *kc, struct snd_soc_tplg_tlv_dbscale *scale)
  {
  	unsigned int item_len = 2 * sizeof(unsigned int);
  	unsigned int *p;
  
  	p = kzalloc(item_len + 2 * sizeof(unsigned int), GFP_KERNEL);
  	if (!p)
  		return -ENOMEM;
  
  	p[0] = SNDRV_CTL_TLVT_DB_SCALE;
  	p[1] = item_len;
  	p[2] = scale->min;
  	p[3] = (scale->step & TLV_DB_SCALE_MASK)
  			| (scale->mute ? TLV_DB_SCALE_MUTE : 0);
  
  	kc->tlv.p = (void *)p;
  	return 0;
  }
  
  static int soc_tplg_create_tlv(struct soc_tplg *tplg,
  	struct snd_kcontrol_new *kc, struct snd_soc_tplg_ctl_hdr *tc)
  {
  	struct snd_soc_tplg_ctl_tlv *tplg_tlv;
  
  	if (!(tc->access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE))
  		return 0;
  
  	if (!(tc->access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK)) {
  		tplg_tlv = &tc->tlv;
  		switch (tplg_tlv->type) {
  		case SNDRV_CTL_TLVT_DB_SCALE:
  			return soc_tplg_create_tlv_db_scale(tplg, kc,
  					&tplg_tlv->scale);
  
  		/* TODO: add support for other TLV types */
  		default:
  			dev_dbg(tplg->dev, "Unsupported TLV type %d\n",
  					tplg_tlv->type);
  			return -EINVAL;
  		}
  	}
  
  	return 0;
  }
  
  static inline void soc_tplg_free_tlv(struct soc_tplg *tplg,
  	struct snd_kcontrol_new *kc)
  {
  	kfree(kc->tlv.p);
  }
  
  static int soc_tplg_dbytes_create(struct soc_tplg *tplg, unsigned int count,
  	size_t size)
  {
  	struct snd_soc_tplg_bytes_control *be;
  	struct soc_bytes_ext *sbe;
  	struct snd_kcontrol_new kc;
  	int i, err;
  
  	if (soc_tplg_check_elem_count(tplg,
  		sizeof(struct snd_soc_tplg_bytes_control), count,
  			size, "mixer bytes")) {
  		dev_err(tplg->dev, "ASoC: Invalid count %d for byte control\n",
  			count);
  		return -EINVAL;
  	}
  
  	for (i = 0; i < count; i++) {
  		be = (struct snd_soc_tplg_bytes_control *)tplg->pos;
  
  		/* validate kcontrol */
  		if (strnlen(be->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			return -EINVAL;
  
  		sbe = kzalloc(sizeof(*sbe), GFP_KERNEL);
  		if (sbe == NULL)
  			return -ENOMEM;
  
  		tplg->pos += (sizeof(struct snd_soc_tplg_bytes_control) +
  			be->priv.size);
  
  		dev_dbg(tplg->dev,
  			"ASoC: adding bytes kcontrol %s with access 0x%x\n",
  			be->hdr.name, be->hdr.access);
  
  		memset(&kc, 0, sizeof(kc));
  		kc.name = be->hdr.name;
  		kc.private_value = (long)sbe;
  		kc.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  		kc.access = be->hdr.access;
  
  		sbe->max = be->max;
  		sbe->dobj.type = SND_SOC_DOBJ_BYTES;
  		sbe->dobj.ops = tplg->ops;
  		INIT_LIST_HEAD(&sbe->dobj.list);
  
  		/* map io handlers */
  		err = soc_tplg_kcontrol_bind_io(&be->hdr, &kc, tplg);
  		if (err) {
  			soc_control_err(tplg, &be->hdr, be->hdr.name);
  			kfree(sbe);
  			continue;
  		}
  
  		/* pass control to driver for optional further init */
  		err = soc_tplg_init_kcontrol(tplg, &kc,
  			(struct snd_soc_tplg_ctl_hdr *)be);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to init %s\n",
  				be->hdr.name);
  			kfree(sbe);
  			continue;
  		}
  
  		/* register control here */
  		err = soc_tplg_add_kcontrol(tplg, &kc,
  			&sbe->dobj.control.kcontrol);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to add %s\n",
  				be->hdr.name);
  			kfree(sbe);
  			continue;
  		}
  
  		list_add(&sbe->dobj.list, &tplg->comp->dobj_list);
  	}
  	return 0;
  
  }
  
  static int soc_tplg_dmixer_create(struct soc_tplg *tplg, unsigned int count,
  	size_t size)
  {
  	struct snd_soc_tplg_mixer_control *mc;
  	struct soc_mixer_control *sm;
  	struct snd_kcontrol_new kc;
  	int i, err;
  
  	if (soc_tplg_check_elem_count(tplg,
  		sizeof(struct snd_soc_tplg_mixer_control),
  		count, size, "mixers")) {
  
  		dev_err(tplg->dev, "ASoC: invalid count %d for controls\n",
  			count);
  		return -EINVAL;
  	}
  
  	for (i = 0; i < count; i++) {
  		mc = (struct snd_soc_tplg_mixer_control *)tplg->pos;
  
  		/* validate kcontrol */
  		if (strnlen(mc->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			return -EINVAL;
  
  		sm = kzalloc(sizeof(*sm), GFP_KERNEL);
  		if (sm == NULL)
  			return -ENOMEM;
  		tplg->pos += (sizeof(struct snd_soc_tplg_mixer_control) +
  			mc->priv.size);
  
  		dev_dbg(tplg->dev,
  			"ASoC: adding mixer kcontrol %s with access 0x%x\n",
  			mc->hdr.name, mc->hdr.access);
  
  		memset(&kc, 0, sizeof(kc));
  		kc.name = mc->hdr.name;
  		kc.private_value = (long)sm;
  		kc.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  		kc.access = mc->hdr.access;
  
  		/* we only support FL/FR channel mapping atm */
  		sm->reg = tplc_chan_get_reg(tplg, mc->channel,
  			SNDRV_CHMAP_FL);
  		sm->rreg = tplc_chan_get_reg(tplg, mc->channel,
  			SNDRV_CHMAP_FR);
  		sm->shift = tplc_chan_get_shift(tplg, mc->channel,
  			SNDRV_CHMAP_FL);
  		sm->rshift = tplc_chan_get_shift(tplg, mc->channel,
  			SNDRV_CHMAP_FR);
  
  		sm->max = mc->max;
  		sm->min = mc->min;
  		sm->invert = mc->invert;
  		sm->platform_max = mc->platform_max;
  		sm->dobj.index = tplg->index;
  		sm->dobj.ops = tplg->ops;
  		sm->dobj.type = SND_SOC_DOBJ_MIXER;
  		INIT_LIST_HEAD(&sm->dobj.list);
  
  		/* map io handlers */
  		err = soc_tplg_kcontrol_bind_io(&mc->hdr, &kc, tplg);
  		if (err) {
  			soc_control_err(tplg, &mc->hdr, mc->hdr.name);
  			kfree(sm);
  			continue;
  		}
  
  		/* pass control to driver for optional further init */
  		err = soc_tplg_init_kcontrol(tplg, &kc,
  			(struct snd_soc_tplg_ctl_hdr *) mc);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to init %s\n",
  				mc->hdr.name);
  			kfree(sm);
  			continue;
  		}
  
  		/* create any TLV data */
  		soc_tplg_create_tlv(tplg, &kc, &mc->hdr);
  
  		/* register control here */
  		err = soc_tplg_add_kcontrol(tplg, &kc,
  			&sm->dobj.control.kcontrol);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to add %s\n",
  				mc->hdr.name);
  			soc_tplg_free_tlv(tplg, &kc);
  			kfree(sm);
  			continue;
  		}
  
  		list_add(&sm->dobj.list, &tplg->comp->dobj_list);
  	}
  
  	return 0;
  }
  
  static int soc_tplg_denum_create_texts(struct soc_enum *se,
  	struct snd_soc_tplg_enum_control *ec)
  {
  	int i, ret;
  
  	se->dobj.control.dtexts =
  		kcalloc(ec->items, sizeof(char *), GFP_KERNEL);
  	if (se->dobj.control.dtexts == NULL)
  		return -ENOMEM;
  
  	for (i = 0; i < ec->items; i++) {
  
  		if (strnlen(ec->texts[i], SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN) {
  			ret = -EINVAL;
  			goto err;
  		}
  
  		se->dobj.control.dtexts[i] = kstrdup(ec->texts[i], GFP_KERNEL);
  		if (!se->dobj.control.dtexts[i]) {
  			ret = -ENOMEM;
  			goto err;
  		}
  	}
  
  	se->texts = (const char * const *)se->dobj.control.dtexts;
  	return 0;
  
  err:
  	for (--i; i >= 0; i--)
  		kfree(se->dobj.control.dtexts[i]);
  	kfree(se->dobj.control.dtexts);
  	return ret;
  }
  
  static int soc_tplg_denum_create_values(struct soc_enum *se,
  	struct snd_soc_tplg_enum_control *ec)
  {
  	if (ec->items > sizeof(*ec->values))
  		return -EINVAL;
  
  	se->dobj.control.dvalues = kmemdup(ec->values,
  					   ec->items * sizeof(u32),
  					   GFP_KERNEL);
  	if (!se->dobj.control.dvalues)
  		return -ENOMEM;
  
  	return 0;
  }
  
  static int soc_tplg_denum_create(struct soc_tplg *tplg, unsigned int count,
  	size_t size)
  {
  	struct snd_soc_tplg_enum_control *ec;
  	struct soc_enum *se;
  	struct snd_kcontrol_new kc;
  	int i, ret, err;
  
  	if (soc_tplg_check_elem_count(tplg,
  		sizeof(struct snd_soc_tplg_enum_control),
  		count, size, "enums")) {
  
  		dev_err(tplg->dev, "ASoC: invalid count %d for enum controls\n",
  			count);
  		return -EINVAL;
  	}
  
  	for (i = 0; i < count; i++) {
  		ec = (struct snd_soc_tplg_enum_control *)tplg->pos;
  		tplg->pos += (sizeof(struct snd_soc_tplg_enum_control) +
  			ec->priv.size);
  
  		/* validate kcontrol */
  		if (strnlen(ec->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			return -EINVAL;
  
  		se = kzalloc((sizeof(*se)), GFP_KERNEL);
  		if (se == NULL)
  			return -ENOMEM;
  
  		dev_dbg(tplg->dev, "ASoC: adding enum kcontrol %s size %d\n",
  			ec->hdr.name, ec->items);
  
  		memset(&kc, 0, sizeof(kc));
  		kc.name = ec->hdr.name;
  		kc.private_value = (long)se;
  		kc.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  		kc.access = ec->hdr.access;
  
  		se->reg = tplc_chan_get_reg(tplg, ec->channel, SNDRV_CHMAP_FL);
  		se->shift_l = tplc_chan_get_shift(tplg, ec->channel,
  			SNDRV_CHMAP_FL);
  		se->shift_r = tplc_chan_get_shift(tplg, ec->channel,
  			SNDRV_CHMAP_FL);
  
  		se->items = ec->items;
  		se->mask = ec->mask;
  		se->dobj.index = tplg->index;
  		se->dobj.type = SND_SOC_DOBJ_ENUM;
  		se->dobj.ops = tplg->ops;
  		INIT_LIST_HEAD(&se->dobj.list);
  
  		switch (ec->hdr.ops.info) {
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
  		case SND_SOC_TPLG_CTL_ENUM_VALUE:
  			err = soc_tplg_denum_create_values(se, ec);
  			if (err < 0) {
  				dev_err(tplg->dev,
  					"ASoC: could not create values for %s\n",
  					ec->hdr.name);
  				kfree(se);
  				continue;
  			}
  			/* fall through and create texts */
  		case SND_SOC_TPLG_CTL_ENUM:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
  			err = soc_tplg_denum_create_texts(se, ec);
  			if (err < 0) {
  				dev_err(tplg->dev,
  					"ASoC: could not create texts for %s\n",
  					ec->hdr.name);
  				kfree(se);
  				continue;
  			}
  			break;
  		default:
  			dev_err(tplg->dev,
  				"ASoC: invalid enum control type %d for %s\n",
  				ec->hdr.ops.info, ec->hdr.name);
  			kfree(se);
  			continue;
  		}
  
  		/* map io handlers */
  		err = soc_tplg_kcontrol_bind_io(&ec->hdr, &kc, tplg);
  		if (err) {
  			soc_control_err(tplg, &ec->hdr, ec->hdr.name);
  			kfree(se);
  			continue;
  		}
  
  		/* pass control to driver for optional further init */
  		err = soc_tplg_init_kcontrol(tplg, &kc,
  			(struct snd_soc_tplg_ctl_hdr *) ec);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to init %s\n",
  				ec->hdr.name);
  			kfree(se);
  			continue;
  		}
  
  		/* register control here */
  		ret = soc_tplg_add_kcontrol(tplg,
  			&kc, &se->dobj.control.kcontrol);
  		if (ret < 0) {
  			dev_err(tplg->dev, "ASoC: could not add kcontrol %s\n",
  				ec->hdr.name);
  			kfree(se);
  			continue;
  		}
  
  		list_add(&se->dobj.list, &tplg->comp->dobj_list);
  	}
  
  	return 0;
  }
  
  static int soc_tplg_kcontrol_elems_load(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_tplg_ctl_hdr *control_hdr;
  	int i;
  
  	if (tplg->pass != SOC_TPLG_PASS_MIXER) {
  		tplg->pos += hdr->size + hdr->payload_size;
  		return 0;
  	}
  
  	dev_dbg(tplg->dev, "ASoC: adding %d kcontrols at 0x%lx\n", hdr->count,
  		soc_tplg_get_offset(tplg));
  
  	for (i = 0; i < hdr->count; i++) {
  
  		control_hdr = (struct snd_soc_tplg_ctl_hdr *)tplg->pos;
  
  		if (control_hdr->size != sizeof(*control_hdr)) {
  			dev_err(tplg->dev, "ASoC: invalid control size\n");
  			return -EINVAL;
  		}
  
  		switch (control_hdr->ops.info) {
  		case SND_SOC_TPLG_CTL_VOLSW:
  		case SND_SOC_TPLG_CTL_STROBE:
  		case SND_SOC_TPLG_CTL_VOLSW_SX:
  		case SND_SOC_TPLG_CTL_VOLSW_XR_SX:
  		case SND_SOC_TPLG_CTL_RANGE:
  		case SND_SOC_TPLG_DAPM_CTL_VOLSW:
  		case SND_SOC_TPLG_DAPM_CTL_PIN:
  			soc_tplg_dmixer_create(tplg, 1, hdr->payload_size);
  			break;
  		case SND_SOC_TPLG_CTL_ENUM:
  		case SND_SOC_TPLG_CTL_ENUM_VALUE:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
  			soc_tplg_denum_create(tplg, 1, hdr->payload_size);
  			break;
  		case SND_SOC_TPLG_CTL_BYTES:
  			soc_tplg_dbytes_create(tplg, 1, hdr->payload_size);
  			break;
  		default:
  			soc_bind_err(tplg, control_hdr, i);
  			return -EINVAL;
  		}
  	}
  
  	return 0;
  }
  
  /* optionally pass new dynamic kcontrol to component driver. */
  static int soc_tplg_add_route(struct soc_tplg *tplg,
  	struct snd_soc_dapm_route *route)
  {
  	if (tplg->comp && tplg->ops && tplg->ops->dapm_route_load)
  		return tplg->ops->dapm_route_load(tplg->comp, tplg->index,
  			route);
  
  	return 0;
  }
  
  static int soc_tplg_dapm_graph_elems_load(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_dapm_context *dapm = &tplg->comp->dapm;
  	struct snd_soc_dapm_route route;
  	struct snd_soc_tplg_dapm_graph_elem *elem;
  	int count = hdr->count, i;
  
  	if (tplg->pass != SOC_TPLG_PASS_GRAPH) {
  		tplg->pos += hdr->size + hdr->payload_size;
  		return 0;
  	}
  
  	if (soc_tplg_check_elem_count(tplg,
  		sizeof(struct snd_soc_tplg_dapm_graph_elem),
  		count, hdr->payload_size, "graph")) {
  
  		dev_err(tplg->dev, "ASoC: invalid count %d for DAPM routes\n",
  			count);
  		return -EINVAL;
  	}
  
  	dev_dbg(tplg->dev, "ASoC: adding %d DAPM routes for index %d\n", count,
  		hdr->index);
  
  	for (i = 0; i < count; i++) {
  		elem = (struct snd_soc_tplg_dapm_graph_elem *)tplg->pos;
  		tplg->pos += sizeof(struct snd_soc_tplg_dapm_graph_elem);
  
  		/* validate routes */
  		if (strnlen(elem->source, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			return -EINVAL;
  		if (strnlen(elem->sink, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			return -EINVAL;
  		if (strnlen(elem->control, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			return -EINVAL;
  
  		route.source = elem->source;
  		route.sink = elem->sink;
  		route.connected = NULL; /* set to NULL atm for tplg users */
  		if (strnlen(elem->control, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) == 0)
  			route.control = NULL;
  		else
  			route.control = elem->control;
  
  		soc_tplg_add_route(tplg, &route);
  
  		/* add route, but keep going if some fail */
  		snd_soc_dapm_add_routes(dapm, &route, 1);
  	}
  
  	return 0;
  }
  
  static struct snd_kcontrol_new *soc_tplg_dapm_widget_dmixer_create(
  	struct soc_tplg *tplg, int num_kcontrols)
  {
  	struct snd_kcontrol_new *kc;
  	struct soc_mixer_control *sm;
  	struct snd_soc_tplg_mixer_control *mc;
  	int i, err;
  
  	kc = kcalloc(num_kcontrols, sizeof(*kc), GFP_KERNEL);
  	if (kc == NULL)
  		return NULL;
  
  	for (i = 0; i < num_kcontrols; i++) {
  		mc = (struct snd_soc_tplg_mixer_control *)tplg->pos;
  		sm = kzalloc(sizeof(*sm), GFP_KERNEL);
  		if (sm == NULL)
  			goto err;
  
  		tplg->pos += (sizeof(struct snd_soc_tplg_mixer_control) +
  			mc->priv.size);
  
  		/* validate kcontrol */
  		if (strnlen(mc->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			goto err_str;
  
  		dev_dbg(tplg->dev, " adding DAPM widget mixer control %s at %d\n",
  			mc->hdr.name, i);
  
  		kc[i].name = kstrdup(mc->hdr.name, GFP_KERNEL);
  		if (kc[i].name == NULL)
  			goto err_str;
  		kc[i].private_value = (long)sm;
  		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  		kc[i].access = mc->hdr.access;
  
  		/* we only support FL/FR channel mapping atm */
  		sm->reg = tplc_chan_get_reg(tplg, mc->channel,
  			SNDRV_CHMAP_FL);
  		sm->rreg = tplc_chan_get_reg(tplg, mc->channel,
  			SNDRV_CHMAP_FR);
  		sm->shift = tplc_chan_get_shift(tplg, mc->channel,
  			SNDRV_CHMAP_FL);
  		sm->rshift = tplc_chan_get_shift(tplg, mc->channel,
  			SNDRV_CHMAP_FR);
  
  		sm->max = mc->max;
  		sm->min = mc->min;
  		sm->invert = mc->invert;
  		sm->platform_max = mc->platform_max;
  		sm->dobj.index = tplg->index;
  		INIT_LIST_HEAD(&sm->dobj.list);
  
  		/* map io handlers */
  		err = soc_tplg_kcontrol_bind_io(&mc->hdr, &kc[i], tplg);
  		if (err) {
  			soc_control_err(tplg, &mc->hdr, mc->hdr.name);
  			kfree(sm);
  			continue;
  		}
  
  		/* pass control to driver for optional further init */
  		err = soc_tplg_init_kcontrol(tplg, &kc[i],
  			(struct snd_soc_tplg_ctl_hdr *)mc);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to init %s\n",
  				mc->hdr.name);
  			kfree(sm);
  			continue;
  		}
  
  		/* create any TLV data */
  		soc_tplg_create_tlv(tplg, &kc[i], &mc->hdr);
  	}
  	return kc;
  
  err_str:
  	kfree(sm);
  err:
  	for (--i; i >= 0; i--) {
  		kfree((void *)kc[i].private_value);
  		kfree(kc[i].name);
  	}
  	kfree(kc);
  	return NULL;
  }
  
  static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
  	struct soc_tplg *tplg, int num_kcontrols)
  {
  	struct snd_kcontrol_new *kc;
  	struct snd_soc_tplg_enum_control *ec;
  	struct soc_enum *se;
  	int i, j, err;
  
  	kc = kcalloc(num_kcontrols, sizeof(*kc), GFP_KERNEL);
  	if (kc == NULL)
  		return NULL;
  
  	for (i = 0; i < num_kcontrols; i++) {
  		ec = (struct snd_soc_tplg_enum_control *)tplg->pos;
  		/* validate kcontrol */
  		if (strnlen(ec->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			    SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			goto err;
  
  		se = kzalloc(sizeof(*se), GFP_KERNEL);
  		if (se == NULL)
  			goto err;
  
  		dev_dbg(tplg->dev, " adding DAPM widget enum control %s\n",
  			ec->hdr.name);
  
  		kc[i].name = kstrdup(ec->hdr.name, GFP_KERNEL);
  		if (kc[i].name == NULL) {
  			kfree(se);
  			goto err_se;
  		}
  		kc[i].private_value = (long)se;
  		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  		kc[i].access = ec->hdr.access;
  
  		/* we only support FL/FR channel mapping atm */
  		se->reg = tplc_chan_get_reg(tplg, ec->channel, SNDRV_CHMAP_FL);
  		se->shift_l = tplc_chan_get_shift(tplg, ec->channel,
  						  SNDRV_CHMAP_FL);
  		se->shift_r = tplc_chan_get_shift(tplg, ec->channel,
  						  SNDRV_CHMAP_FR);
  
  		se->items = ec->items;
  		se->mask = ec->mask;
  		se->dobj.index = tplg->index;
  
  		switch (ec->hdr.ops.info) {
  		case SND_SOC_TPLG_CTL_ENUM_VALUE:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
  			err = soc_tplg_denum_create_values(se, ec);
  			if (err < 0) {
  				dev_err(tplg->dev, "ASoC: could not create values for %s\n",
  					ec->hdr.name);
  				goto err_se;
  			}
  			/* fall through to create texts */
  		case SND_SOC_TPLG_CTL_ENUM:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
  		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
  			err = soc_tplg_denum_create_texts(se, ec);
  			if (err < 0) {
  				dev_err(tplg->dev, "ASoC: could not create texts for %s\n",
  					ec->hdr.name);
  				goto err_se;
  			}
  			break;
  		default:
  			dev_err(tplg->dev, "ASoC: invalid enum control type %d for %s\n",
  				ec->hdr.ops.info, ec->hdr.name);
  			goto err_se;
  		}
  
  		/* map io handlers */
  		err = soc_tplg_kcontrol_bind_io(&ec->hdr, &kc[i], tplg);
  		if (err) {
  			soc_control_err(tplg, &ec->hdr, ec->hdr.name);
  			goto err_se;
  		}
  
  		/* pass control to driver for optional further init */
  		err = soc_tplg_init_kcontrol(tplg, &kc[i],
  			(struct snd_soc_tplg_ctl_hdr *)ec);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to init %s\n",
  				ec->hdr.name);
  			goto err_se;
  		}
  
  		tplg->pos += (sizeof(struct snd_soc_tplg_enum_control) +
  				ec->priv.size);
  	}
  
  	return kc;
  
  err_se:
  	for (; i >= 0; i--) {
  		/* free values and texts */
  		se = (struct soc_enum *)kc[i].private_value;
  		if (!se)
  			continue;
  
  		kfree(se->dobj.control.dvalues);
  		for (j = 0; j < ec->items; j++)
  			kfree(se->dobj.control.dtexts[j]);
  
  		kfree(se);
  		kfree(kc[i].name);
  	}
  err:
  	kfree(kc);
  
  	return NULL;
  }
  
  static struct snd_kcontrol_new *soc_tplg_dapm_widget_dbytes_create(
  	struct soc_tplg *tplg, int count)
  {
  	struct snd_soc_tplg_bytes_control *be;
  	struct soc_bytes_ext  *sbe;
  	struct snd_kcontrol_new *kc;
  	int i, err;
  
  	kc = kcalloc(count, sizeof(*kc), GFP_KERNEL);
  	if (!kc)
  		return NULL;
  
  	for (i = 0; i < count; i++) {
  		be = (struct snd_soc_tplg_bytes_control *)tplg->pos;
  
  		/* validate kcontrol */
  		if (strnlen(be->hdr.name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  			SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  			goto err;
  
  		sbe = kzalloc(sizeof(*sbe), GFP_KERNEL);
  		if (sbe == NULL)
  			goto err;
  
  		tplg->pos += (sizeof(struct snd_soc_tplg_bytes_control) +
  			be->priv.size);
  
  		dev_dbg(tplg->dev,
  			"ASoC: adding bytes kcontrol %s with access 0x%x\n",
  			be->hdr.name, be->hdr.access);
  
  		kc[i].name = kstrdup(be->hdr.name, GFP_KERNEL);
  		if (kc[i].name == NULL) {
  			kfree(sbe);
  			goto err;
  		}
  		kc[i].private_value = (long)sbe;
  		kc[i].iface = SNDRV_CTL_ELEM_IFACE_MIXER;
  		kc[i].access = be->hdr.access;
  
  		sbe->max = be->max;
  		INIT_LIST_HEAD(&sbe->dobj.list);
  
  		/* map standard io handlers and check for external handlers */
  		err = soc_tplg_kcontrol_bind_io(&be->hdr, &kc[i], tplg);
  		if (err) {
  			soc_control_err(tplg, &be->hdr, be->hdr.name);
  			kfree(sbe);
  			continue;
  		}
  
  		/* pass control to driver for optional further init */
  		err = soc_tplg_init_kcontrol(tplg, &kc[i],
  			(struct snd_soc_tplg_ctl_hdr *)be);
  		if (err < 0) {
  			dev_err(tplg->dev, "ASoC: failed to init %s\n",
  				be->hdr.name);
  			kfree(sbe);
  			continue;
  		}
  	}
  
  	return kc;
  
  err:
  	for (--i; i >= 0; i--) {
  		kfree((void *)kc[i].private_value);
  		kfree(kc[i].name);
  	}
  
  	kfree(kc);
  	return NULL;
  }
  
  static int soc_tplg_dapm_widget_create(struct soc_tplg *tplg,
  	struct snd_soc_tplg_dapm_widget *w)
  {
  	struct snd_soc_dapm_context *dapm = &tplg->comp->dapm;
  	struct snd_soc_dapm_widget template, *widget;
  	struct snd_soc_tplg_ctl_hdr *control_hdr;
  	struct snd_soc_card *card = tplg->comp->card;
  	unsigned int kcontrol_type;
  	int ret = 0;
  
  	if (strnlen(w->name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  		SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  		return -EINVAL;
  	if (strnlen(w->sname, SNDRV_CTL_ELEM_ID_NAME_MAXLEN) ==
  		SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  		return -EINVAL;
  
  	dev_dbg(tplg->dev, "ASoC: creating DAPM widget %s id %d\n",
  		w->name, w->id);
  
  	memset(&template, 0, sizeof(template));
  
  	/* map user to kernel widget ID */
  	template.id = get_widget_id(w->id);
  	if (template.id < 0)
  		return template.id;
  
  	/* strings are allocated here, but used and freed by the widget */
  	template.name = kstrdup(w->name, GFP_KERNEL);
  	if (!template.name)
  		return -ENOMEM;
  	template.sname = kstrdup(w->sname, GFP_KERNEL);
  	if (!template.sname) {
  		ret = -ENOMEM;
  		goto err;
  	}
  	template.reg = w->reg;
  	template.shift = w->shift;
  	template.mask = w->mask;
  	template.subseq = w->subseq;
  	template.on_val = w->invert ? 0 : 1;
  	template.off_val = w->invert ? 1 : 0;
  	template.ignore_suspend = w->ignore_suspend;
  	template.event_flags = w->event_flags;
  	template.dobj.index = tplg->index;
  
  	tplg->pos +=
  		(sizeof(struct snd_soc_tplg_dapm_widget) + w->priv.size);
  	if (w->num_kcontrols == 0) {
  		kcontrol_type = 0;
  		template.num_kcontrols = 0;
  		goto widget;
  	}
  
  	control_hdr = (struct snd_soc_tplg_ctl_hdr *)tplg->pos;
  	dev_dbg(tplg->dev, "ASoC: template %s has %d controls of type %x\n",
  		w->name, w->num_kcontrols, control_hdr->type);
  
  	switch (control_hdr->ops.info) {
  	case SND_SOC_TPLG_CTL_VOLSW:
  	case SND_SOC_TPLG_CTL_STROBE:
  	case SND_SOC_TPLG_CTL_VOLSW_SX:
  	case SND_SOC_TPLG_CTL_VOLSW_XR_SX:
  	case SND_SOC_TPLG_CTL_RANGE:
  	case SND_SOC_TPLG_DAPM_CTL_VOLSW:
  		kcontrol_type = SND_SOC_TPLG_TYPE_MIXER;  /* volume mixer */
  		template.num_kcontrols = w->num_kcontrols;
  		template.kcontrol_news =
  			soc_tplg_dapm_widget_dmixer_create(tplg,
  			template.num_kcontrols);
  		if (!template.kcontrol_news) {
  			ret = -ENOMEM;
  			goto hdr_err;
  		}
  		break;
  	case SND_SOC_TPLG_CTL_ENUM:
  	case SND_SOC_TPLG_CTL_ENUM_VALUE:
  	case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
  	case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
  	case SND_SOC_TPLG_DAPM_CTL_ENUM_VALUE:
  		kcontrol_type = SND_SOC_TPLG_TYPE_ENUM;	/* enumerated mixer */
  		template.num_kcontrols = w->num_kcontrols;
  		template.kcontrol_news =
  			soc_tplg_dapm_widget_denum_create(tplg,
  			template.num_kcontrols);
  		if (!template.kcontrol_news) {
  			ret = -ENOMEM;
  			goto hdr_err;
  		}
  		break;
  	case SND_SOC_TPLG_CTL_BYTES:
  		kcontrol_type = SND_SOC_TPLG_TYPE_BYTES; /* bytes control */
  		template.num_kcontrols = w->num_kcontrols;
  		template.kcontrol_news =
  			soc_tplg_dapm_widget_dbytes_create(tplg,
  				template.num_kcontrols);
  		if (!template.kcontrol_news) {
  			ret = -ENOMEM;
  			goto hdr_err;
  		}
  		break;
  	default:
  		dev_err(tplg->dev, "ASoC: invalid widget control type %d:%d:%d\n",
  			control_hdr->ops.get, control_hdr->ops.put,
  			control_hdr->ops.info);
  		ret = -EINVAL;
  		goto hdr_err;
  	}
  
  widget:
  	ret = soc_tplg_widget_load(tplg, &template, w);
  	if (ret < 0)
  		goto hdr_err;
  
  	/* card dapm mutex is held by the core if we are loading topology
  	 * data during sound card init. */
  	if (card->instantiated)
  		widget = snd_soc_dapm_new_control(dapm, &template);
  	else
  		widget = snd_soc_dapm_new_control_unlocked(dapm, &template);
  	if (IS_ERR(widget)) {
  		ret = PTR_ERR(widget);
  		/* Do not nag about probe deferrals */
  		if (ret != -EPROBE_DEFER)
  			dev_err(tplg->dev,
  				"ASoC: failed to create widget %s controls (%d)\n",
  				w->name, ret);
  		goto hdr_err;
  	}
  	if (widget == NULL) {
  		dev_err(tplg->dev, "ASoC: failed to create widget %s controls\n",
  			w->name);
  		ret = -ENOMEM;
  		goto hdr_err;
  	}
  
  	widget->dobj.type = SND_SOC_DOBJ_WIDGET;
  	widget->dobj.widget.kcontrol_type = kcontrol_type;
  	widget->dobj.ops = tplg->ops;
  	widget->dobj.index = tplg->index;
  	list_add(&widget->dobj.list, &tplg->comp->dobj_list);
  
  	ret = soc_tplg_widget_ready(tplg, widget, w);
  	if (ret < 0)
  		goto ready_err;
  
  	return 0;
  
  ready_err:
  	snd_soc_tplg_widget_remove(widget);
  	snd_soc_dapm_free_widget(widget);
  hdr_err:
  	kfree(template.sname);
  err:
  	kfree(template.name);
  	return ret;
  }
  
  static int soc_tplg_dapm_widget_elems_load(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_tplg_dapm_widget *widget;
  	int ret, count = hdr->count, i;
  
  	if (tplg->pass != SOC_TPLG_PASS_WIDGET)
  		return 0;
  
  	dev_dbg(tplg->dev, "ASoC: adding %d DAPM widgets\n", count);
  
  	for (i = 0; i < count; i++) {
  		widget = (struct snd_soc_tplg_dapm_widget *) tplg->pos;
  		if (widget->size != sizeof(*widget)) {
  			dev_err(tplg->dev, "ASoC: invalid widget size\n");
  			return -EINVAL;
  		}
  
  		ret = soc_tplg_dapm_widget_create(tplg, widget);
  		if (ret < 0) {
  			dev_err(tplg->dev, "ASoC: failed to load widget %s\n",
  				widget->name);
  			return ret;
  		}
  	}
  
  	return 0;
  }
  
  static int soc_tplg_dapm_complete(struct soc_tplg *tplg)
  {
  	struct snd_soc_card *card = tplg->comp->card;
  	int ret;
  
  	/* Card might not have been registered at this point.
  	 * If so, just return success.
  	*/
  	if (!card || !card->instantiated) {
  		dev_warn(tplg->dev, "ASoC: Parent card not yet available,"
  			" widget card binding deferred\n");
  		return 0;
  	}
  
  	ret = snd_soc_dapm_new_widgets(card);
  	if (ret < 0)
  		dev_err(tplg->dev, "ASoC: failed to create new widgets %d\n",
  			ret);
  
  	return 0;
  }
  
  static void set_stream_info(struct snd_soc_pcm_stream *stream,
  	struct snd_soc_tplg_stream_caps *caps)
  {
  	stream->stream_name = kstrdup(caps->name, GFP_KERNEL);
  	stream->channels_min = caps->channels_min;
  	stream->channels_max = caps->channels_max;
  	stream->rates = caps->rates;
  	stream->rate_min = caps->rate_min;
  	stream->rate_max = caps->rate_max;
  	stream->formats = caps->formats;
  	stream->sig_bits = caps->sig_bits;
  }
  
  static void set_dai_flags(struct snd_soc_dai_driver *dai_drv,
  			  unsigned int flag_mask, unsigned int flags)
  {
  	if (flag_mask & SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_RATES)
  		dai_drv->symmetric_rates =
  			flags & SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_RATES ? 1 : 0;
  
  	if (flag_mask & SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_CHANNELS)
  		dai_drv->symmetric_channels =
  			flags & SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_CHANNELS ?
  			1 : 0;
  
  	if (flag_mask & SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_SAMPLEBITS)
  		dai_drv->symmetric_samplebits =
  			flags & SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_SAMPLEBITS ?
  			1 : 0;
  }
  
  static int soc_tplg_dai_create(struct soc_tplg *tplg,
  	struct snd_soc_tplg_pcm *pcm)
  {
  	struct snd_soc_dai_driver *dai_drv;
  	struct snd_soc_pcm_stream *stream;
  	struct snd_soc_tplg_stream_caps *caps;
  	int ret;
  
  	dai_drv = kzalloc(sizeof(struct snd_soc_dai_driver), GFP_KERNEL);
  	if (dai_drv == NULL)
  		return -ENOMEM;
  
  	if (strlen(pcm->dai_name))
  		dai_drv->name = kstrdup(pcm->dai_name, GFP_KERNEL);
  	dai_drv->id = pcm->dai_id;
  
  	if (pcm->playback) {
  		stream = &dai_drv->playback;
  		caps = &pcm->caps[SND_SOC_TPLG_STREAM_PLAYBACK];
  		set_stream_info(stream, caps);
  	}
  
  	if (pcm->capture) {
  		stream = &dai_drv->capture;
  		caps = &pcm->caps[SND_SOC_TPLG_STREAM_CAPTURE];
  		set_stream_info(stream, caps);
  	}
  
  	if (pcm->compress)
  		dai_drv->compress_new = snd_soc_new_compress;
  
  	/* pass control to component driver for optional further init */
  	ret = soc_tplg_dai_load(tplg, dai_drv, pcm, NULL);
  	if (ret < 0) {
  		dev_err(tplg->comp->dev, "ASoC: DAI loading failed\n");
  		kfree(dai_drv);
  		return ret;
  	}
  
  	dai_drv->dobj.index = tplg->index;
  	dai_drv->dobj.ops = tplg->ops;
  	dai_drv->dobj.type = SND_SOC_DOBJ_PCM;
  	list_add(&dai_drv->dobj.list, &tplg->comp->dobj_list);
  
  	/* register the DAI to the component */
  	return snd_soc_register_dai(tplg->comp, dai_drv);
  }
  
  static void set_link_flags(struct snd_soc_dai_link *link,
  		unsigned int flag_mask, unsigned int flags)
  {
  	if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_RATES)
  		link->symmetric_rates =
  			flags & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_RATES ? 1 : 0;
  
  	if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_CHANNELS)
  		link->symmetric_channels =
  			flags & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_CHANNELS ?
  			1 : 0;
  
  	if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_SAMPLEBITS)
  		link->symmetric_samplebits =
  			flags & SND_SOC_TPLG_LNK_FLGBIT_SYMMETRIC_SAMPLEBITS ?
  			1 : 0;
  
  	if (flag_mask & SND_SOC_TPLG_LNK_FLGBIT_VOICE_WAKEUP)
  		link->ignore_suspend =
  		flags & SND_SOC_TPLG_LNK_FLGBIT_VOICE_WAKEUP ?
  		1 : 0;
  }
  
  /* create the FE DAI link */
  static int soc_tplg_fe_link_create(struct soc_tplg *tplg,
  	struct snd_soc_tplg_pcm *pcm)
  {
  	struct snd_soc_dai_link *link;
  	int ret;
  
  	link = kzalloc(sizeof(struct snd_soc_dai_link), GFP_KERNEL);
  	if (link == NULL)
  		return -ENOMEM;
  
  	if (strlen(pcm->pcm_name)) {
  		link->name = kstrdup(pcm->pcm_name, GFP_KERNEL);
  		link->stream_name = kstrdup(pcm->pcm_name, GFP_KERNEL);
  	}
  	link->id = pcm->pcm_id;
  
  	if (strlen(pcm->dai_name))
  		link->cpu_dai_name = kstrdup(pcm->dai_name, GFP_KERNEL);
  
  	link->codec_name = "snd-soc-dummy";
  	link->codec_dai_name = "snd-soc-dummy-dai";
  
  	/* enable DPCM */
  	link->dynamic = 1;
  	link->dpcm_playback = pcm->playback;
  	link->dpcm_capture = pcm->capture;
  	if (pcm->flag_mask)
  		set_link_flags(link, pcm->flag_mask, pcm->flags);
  
  	/* pass control to component driver for optional further init */
  	ret = soc_tplg_dai_link_load(tplg, link, NULL);
  	if (ret < 0) {
  		dev_err(tplg->comp->dev, "ASoC: FE link loading failed\n");
  		kfree(link);
  		return ret;
  	}
  
  	link->dobj.index = tplg->index;
  	link->dobj.ops = tplg->ops;
  	link->dobj.type = SND_SOC_DOBJ_DAI_LINK;
  	list_add(&link->dobj.list, &tplg->comp->dobj_list);
  
  	snd_soc_add_dai_link(tplg->comp->card, link);
  	return 0;
  }
  
  /* create a FE DAI and DAI link from the PCM object */
  static int soc_tplg_pcm_create(struct soc_tplg *tplg,
  	struct snd_soc_tplg_pcm *pcm)
  {
  	int ret;
  
  	ret = soc_tplg_dai_create(tplg, pcm);
  	if (ret < 0)
  		return ret;
  
  	return  soc_tplg_fe_link_create(tplg, pcm);
  }
  
  /* copy stream caps from the old version 4 of source */
  static void stream_caps_new_ver(struct snd_soc_tplg_stream_caps *dest,
  				struct snd_soc_tplg_stream_caps_v4 *src)
  {
  	dest->size = sizeof(*dest);
  	memcpy(dest->name, src->name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
  	dest->formats = src->formats;
  	dest->rates = src->rates;
  	dest->rate_min = src->rate_min;
  	dest->rate_max = src->rate_max;
  	dest->channels_min = src->channels_min;
  	dest->channels_max = src->channels_max;
  	dest->periods_min = src->periods_min;
  	dest->periods_max = src->periods_max;
  	dest->period_size_min = src->period_size_min;
  	dest->period_size_max = src->period_size_max;
  	dest->buffer_size_min = src->buffer_size_min;
  	dest->buffer_size_max = src->buffer_size_max;
  }
  
  /**
   * pcm_new_ver - Create the new version of PCM from the old version.
   * @tplg: topology context
   * @src: older version of pcm as a source
   * @pcm: latest version of pcm created from the source
   *
   * Support from vesion 4. User should free the returned pcm manually.
   */
  static int pcm_new_ver(struct soc_tplg *tplg,
  		       struct snd_soc_tplg_pcm *src,
  		       struct snd_soc_tplg_pcm **pcm)
  {
  	struct snd_soc_tplg_pcm *dest;
  	struct snd_soc_tplg_pcm_v4 *src_v4;
  	int i;
  
  	*pcm = NULL;
  
  	if (src->size != sizeof(*src_v4)) {
  		dev_err(tplg->dev, "ASoC: invalid PCM size\n");
  		return -EINVAL;
  	}
  
  	dev_warn(tplg->dev, "ASoC: old version of PCM\n");
  	src_v4 = (struct snd_soc_tplg_pcm_v4 *)src;
  	dest = kzalloc(sizeof(*dest), GFP_KERNEL);
  	if (!dest)
  		return -ENOMEM;
  
  	dest->size = sizeof(*dest);	/* size of latest abi version */
  	memcpy(dest->pcm_name, src_v4->pcm_name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
  	memcpy(dest->dai_name, src_v4->dai_name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
  	dest->pcm_id = src_v4->pcm_id;
  	dest->dai_id = src_v4->dai_id;
  	dest->playback = src_v4->playback;
  	dest->capture = src_v4->capture;
  	dest->compress = src_v4->compress;
  	dest->num_streams = src_v4->num_streams;
  	for (i = 0; i < dest->num_streams; i++)
  		memcpy(&dest->stream[i], &src_v4->stream[i],
  		       sizeof(struct snd_soc_tplg_stream));
  
  	for (i = 0; i < 2; i++)
  		stream_caps_new_ver(&dest->caps[i], &src_v4->caps[i]);
  
  	*pcm = dest;
  	return 0;
  }
  
  static int soc_tplg_pcm_elems_load(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_tplg_pcm *pcm, *_pcm;
  	int count = hdr->count;
  	int i;
  	bool abi_match;
  
  	if (tplg->pass != SOC_TPLG_PASS_PCM_DAI)
  		return 0;
  
  	/* check the element size and count */
  	pcm = (struct snd_soc_tplg_pcm *)tplg->pos;
  	if (pcm->size > sizeof(struct snd_soc_tplg_pcm)
  		|| pcm->size < sizeof(struct snd_soc_tplg_pcm_v4)) {
  		dev_err(tplg->dev, "ASoC: invalid size %d for PCM elems\n",
  			pcm->size);
  		return -EINVAL;
  	}
  
  	if (soc_tplg_check_elem_count(tplg,
  		pcm->size, count,
  		hdr->payload_size, "PCM DAI")) {
  		dev_err(tplg->dev, "ASoC: invalid count %d for PCM DAI elems\n",
  			count);
  		return -EINVAL;
  	}
  
  	for (i = 0; i < count; i++) {
  		pcm = (struct snd_soc_tplg_pcm *)tplg->pos;
  
  		/* check ABI version by size, create a new version of pcm
  		 * if abi not match.
  		 */
  		if (pcm->size == sizeof(*pcm)) {
  			abi_match = true;
  			_pcm = pcm;
  		} else {
  			abi_match = false;
  			pcm_new_ver(tplg, pcm, &_pcm);
  		}
  
  		/* create the FE DAIs and DAI links */
  		soc_tplg_pcm_create(tplg, _pcm);
  
  		/* offset by version-specific struct size and
  		 * real priv data size
  		 */
  		tplg->pos += pcm->size + _pcm->priv.size;
  
  		if (!abi_match)
  			kfree(_pcm); /* free the duplicated one */
  	}
  
  	dev_dbg(tplg->dev, "ASoC: adding %d PCM DAIs\n", count);
  
  	return 0;
  }
  
  /**
   * set_link_hw_format - Set the HW audio format of the physical DAI link.
   * @link: &snd_soc_dai_link which should be updated
   * @cfg: physical link configs.
   *
   * Topology context contains a list of supported HW formats (configs) and
   * a default format ID for the physical link. This function will use this
   * default ID to choose the HW format to set the link's DAI format for init.
   */
  static void set_link_hw_format(struct snd_soc_dai_link *link,
  			struct snd_soc_tplg_link_config *cfg)
  {
  	struct snd_soc_tplg_hw_config *hw_config;
  	unsigned char bclk_master, fsync_master;
  	unsigned char invert_bclk, invert_fsync;
  	int i;
  
  	for (i = 0; i < cfg->num_hw_configs; i++) {
  		hw_config = &cfg->hw_config[i];
  		if (hw_config->id != cfg->default_hw_config_id)
  			continue;
  
  		link->dai_fmt = hw_config->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
  
  		/* clock gating */
  		switch (hw_config->clock_gated) {
  		case SND_SOC_TPLG_DAI_CLK_GATE_GATED:
  			link->dai_fmt |= SND_SOC_DAIFMT_GATED;
  			break;
  
  		case SND_SOC_TPLG_DAI_CLK_GATE_CONT:
  			link->dai_fmt |= SND_SOC_DAIFMT_CONT;
  			break;
  
  		default:
  			/* ignore the value */
  			break;
  		}
  
  		/* clock signal polarity */
  		invert_bclk = hw_config->invert_bclk;
  		invert_fsync = hw_config->invert_fsync;
  		if (!invert_bclk && !invert_fsync)
  			link->dai_fmt |= SND_SOC_DAIFMT_NB_NF;
  		else if (!invert_bclk && invert_fsync)
  			link->dai_fmt |= SND_SOC_DAIFMT_NB_IF;
  		else if (invert_bclk && !invert_fsync)
  			link->dai_fmt |= SND_SOC_DAIFMT_IB_NF;
  		else
  			link->dai_fmt |= SND_SOC_DAIFMT_IB_IF;
  
  		/* clock masters */
  		bclk_master = (hw_config->bclk_master ==
  			       SND_SOC_TPLG_BCLK_CM);
  		fsync_master = (hw_config->fsync_master ==
  				SND_SOC_TPLG_FSYNC_CM);
  		if (bclk_master && fsync_master)
  			link->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
  		else if (!bclk_master && fsync_master)
  			link->dai_fmt |= SND_SOC_DAIFMT_CBS_CFM;
  		else if (bclk_master && !fsync_master)
  			link->dai_fmt |= SND_SOC_DAIFMT_CBM_CFS;
  		else
  			link->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
  	}
  }
  
  /**
   * link_new_ver - Create a new physical link config from the old
   * version of source.
   * @tplg: topology context
   * @src: old version of phyical link config as a source
   * @link: latest version of physical link config created from the source
   *
   * Support from vesion 4. User need free the returned link config manually.
   */
  static int link_new_ver(struct soc_tplg *tplg,
  			struct snd_soc_tplg_link_config *src,
  			struct snd_soc_tplg_link_config **link)
  {
  	struct snd_soc_tplg_link_config *dest;
  	struct snd_soc_tplg_link_config_v4 *src_v4;
  	int i;
  
  	*link = NULL;
  
  	if (src->size != sizeof(struct snd_soc_tplg_link_config_v4)) {
  		dev_err(tplg->dev, "ASoC: invalid physical link config size\n");
  		return -EINVAL;
  	}
  
  	dev_warn(tplg->dev, "ASoC: old version of physical link config\n");
  
  	src_v4 = (struct snd_soc_tplg_link_config_v4 *)src;
  	dest = kzalloc(sizeof(*dest), GFP_KERNEL);
  	if (!dest)
  		return -ENOMEM;
  
  	dest->size = sizeof(*dest);
  	dest->id = src_v4->id;
  	dest->num_streams = src_v4->num_streams;
  	for (i = 0; i < dest->num_streams; i++)
  		memcpy(&dest->stream[i], &src_v4->stream[i],
  		       sizeof(struct snd_soc_tplg_stream));
  
  	*link = dest;
  	return 0;
  }
  
  /* Find and configure an existing physical DAI link */
  static int soc_tplg_link_config(struct soc_tplg *tplg,
  	struct snd_soc_tplg_link_config *cfg)
  {
  	struct snd_soc_dai_link *link;
  	const char *name, *stream_name;
  	size_t len;
  	int ret;
  
  	len = strnlen(cfg->name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
  	if (len == SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  		return -EINVAL;
  	else if (len)
  		name = cfg->name;
  	else
  		name = NULL;
  
  	len = strnlen(cfg->stream_name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
  	if (len == SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
  		return -EINVAL;
  	else if (len)
  		stream_name = cfg->stream_name;
  	else
  		stream_name = NULL;
  
  	link = snd_soc_find_dai_link(tplg->comp->card, cfg->id,
  				     name, stream_name);
  	if (!link) {
  		dev_err(tplg->dev, "ASoC: physical link %s (id %d) not exist\n",
  			name, cfg->id);
  		return -EINVAL;
  	}
  
  	/* hw format */
  	if (cfg->num_hw_configs)
  		set_link_hw_format(link, cfg);
  
  	/* flags */
  	if (cfg->flag_mask)
  		set_link_flags(link, cfg->flag_mask, cfg->flags);
  
  	/* pass control to component driver for optional further init */
  	ret = soc_tplg_dai_link_load(tplg, link, cfg);
  	if (ret < 0) {
  		dev_err(tplg->dev, "ASoC: physical link loading failed\n");
  		return ret;
  	}
  
  	return 0;
  }
  
  
  /* Load physical link config elements from the topology context */
  static int soc_tplg_link_elems_load(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_tplg_link_config *link, *_link;
  	int count = hdr->count;
  	int i, ret;
  	bool abi_match;
  
  	if (tplg->pass != SOC_TPLG_PASS_LINK) {
  		tplg->pos += hdr->size + hdr->payload_size;
  		return 0;
  	};
  
  	/* check the element size and count */
  	link = (struct snd_soc_tplg_link_config *)tplg->pos;
  	if (link->size > sizeof(struct snd_soc_tplg_link_config)
  		|| link->size < sizeof(struct snd_soc_tplg_link_config_v4)) {
  		dev_err(tplg->dev, "ASoC: invalid size %d for physical link elems\n",
  			link->size);
  		return -EINVAL;
  	}
  
  	if (soc_tplg_check_elem_count(tplg,
  		link->size, count,
  		hdr->payload_size, "physical link config")) {
  		dev_err(tplg->dev, "ASoC: invalid count %d for physical link elems\n",
  			count);
  		return -EINVAL;
  	}
  
  	/* config physical DAI links */
  	for (i = 0; i < count; i++) {
  		link = (struct snd_soc_tplg_link_config *)tplg->pos;
  		if (link->size == sizeof(*link)) {
  			abi_match = true;
  			_link = link;
  		} else {
  			abi_match = false;
  			ret = link_new_ver(tplg, link, &_link);
  			if (ret < 0)
  				return ret;
  		}
  
  		ret = soc_tplg_link_config(tplg, _link);
  		if (ret < 0)
  			return ret;
  
  		/* offset by version-specific struct size and
  		 * real priv data size
  		 */
  		tplg->pos += link->size + _link->priv.size;
  
  		if (!abi_match)
  			kfree(_link); /* free the duplicated one */
  	}
  
  	return 0;
  }
  
  /**
   * soc_tplg_dai_config - Find and configure an existing physical DAI.
   * @tplg: topology context
   * @d: physical DAI configs.
   *
   * The physical dai should already be registered by the platform driver.
   * The platform driver should specify the DAI name and ID for matching.
   */
  static int soc_tplg_dai_config(struct soc_tplg *tplg,
  			       struct snd_soc_tplg_dai *d)
  {
  	struct snd_soc_dai_link_component dai_component = {0};
  	struct snd_soc_dai *dai;
  	struct snd_soc_dai_driver *dai_drv;
  	struct snd_soc_pcm_stream *stream;
  	struct snd_soc_tplg_stream_caps *caps;
  	int ret;
  
  	dai_component.dai_name = d->dai_name;
  	dai = snd_soc_find_dai(&dai_component);
  	if (!dai) {
  		dev_err(tplg->dev, "ASoC: physical DAI %s not registered\n",
  			d->dai_name);
  		return -EINVAL;
  	}
  
  	if (d->dai_id != dai->id) {
  		dev_err(tplg->dev, "ASoC: physical DAI %s id mismatch\n",
  			d->dai_name);
  		return -EINVAL;
  	}
  
  	dai_drv = dai->driver;
  	if (!dai_drv)
  		return -EINVAL;
  
  	if (d->playback) {
  		stream = &dai_drv->playback;
  		caps = &d->caps[SND_SOC_TPLG_STREAM_PLAYBACK];
  		set_stream_info(stream, caps);
  	}
  
  	if (d->capture) {
  		stream = &dai_drv->capture;
  		caps = &d->caps[SND_SOC_TPLG_STREAM_CAPTURE];
  		set_stream_info(stream, caps);
  	}
  
  	if (d->flag_mask)
  		set_dai_flags(dai_drv, d->flag_mask, d->flags);
  
  	/* pass control to component driver for optional further init */
  	ret = soc_tplg_dai_load(tplg, dai_drv, NULL, dai);
  	if (ret < 0) {
  		dev_err(tplg->comp->dev, "ASoC: DAI loading failed\n");
  		return ret;
  	}
  
  	return 0;
  }
  
  /* load physical DAI elements */
  static int soc_tplg_dai_elems_load(struct soc_tplg *tplg,
  				   struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_tplg_dai *dai;
  	int count = hdr->count;
  	int i;
  
  	if (tplg->pass != SOC_TPLG_PASS_BE_DAI)
  		return 0;
  
  	/* config the existing BE DAIs */
  	for (i = 0; i < count; i++) {
  		dai = (struct snd_soc_tplg_dai *)tplg->pos;
  		if (dai->size != sizeof(*dai)) {
  			dev_err(tplg->dev, "ASoC: invalid physical DAI size\n");
  			return -EINVAL;
  		}
  
  		soc_tplg_dai_config(tplg, dai);
  		tplg->pos += (sizeof(*dai) + dai->priv.size);
  	}
  
  	dev_dbg(tplg->dev, "ASoC: Configure %d BE DAIs\n", count);
  	return 0;
  }
  
  /**
   * manifest_new_ver - Create a new version of manifest from the old version
   * of source.
   * @tplg: topology context
   * @src: old version of manifest as a source
   * @manifest: latest version of manifest created from the source
   *
   * Support from vesion 4. Users need free the returned manifest manually.
   */
  static int manifest_new_ver(struct soc_tplg *tplg,
  			    struct snd_soc_tplg_manifest *src,
  			    struct snd_soc_tplg_manifest **manifest)
  {
  	struct snd_soc_tplg_manifest *dest;
  	struct snd_soc_tplg_manifest_v4 *src_v4;
  
  	*manifest = NULL;
  
  	if (src->size != sizeof(*src_v4)) {
  		dev_warn(tplg->dev, "ASoC: invalid manifest size %d\n",
  			 src->size);
  		if (src->size)
  			return -EINVAL;
  		src->size = sizeof(*src_v4);
  	}
  
  	dev_warn(tplg->dev, "ASoC: old version of manifest\n");
  
  	src_v4 = (struct snd_soc_tplg_manifest_v4 *)src;
  	dest = kzalloc(sizeof(*dest) + src_v4->priv.size, GFP_KERNEL);
  	if (!dest)
  		return -ENOMEM;
  
  	dest->size = sizeof(*dest);	/* size of latest abi version */
  	dest->control_elems = src_v4->control_elems;
  	dest->widget_elems = src_v4->widget_elems;
  	dest->graph_elems = src_v4->graph_elems;
  	dest->pcm_elems = src_v4->pcm_elems;
  	dest->dai_link_elems = src_v4->dai_link_elems;
  	dest->priv.size = src_v4->priv.size;
  	if (dest->priv.size)
  		memcpy(dest->priv.data, src_v4->priv.data,
  		       src_v4->priv.size);
  
  	*manifest = dest;
  	return 0;
  }
  
  static int soc_tplg_manifest_load(struct soc_tplg *tplg,
  				  struct snd_soc_tplg_hdr *hdr)
  {
  	struct snd_soc_tplg_manifest *manifest, *_manifest;
  	bool abi_match;
  	int err;
  
  	if (tplg->pass != SOC_TPLG_PASS_MANIFEST)
  		return 0;
  
  	manifest = (struct snd_soc_tplg_manifest *)tplg->pos;
  
  	/* check ABI version by size, create a new manifest if abi not match */
  	if (manifest->size == sizeof(*manifest)) {
  		abi_match = true;
  		_manifest = manifest;
  	} else {
  		abi_match = false;
  		err = manifest_new_ver(tplg, manifest, &_manifest);
  		if (err < 0)
  			return err;
  	}
  
  	/* pass control to component driver for optional further init */
  	if (tplg->comp && tplg->ops && tplg->ops->manifest)
  		return tplg->ops->manifest(tplg->comp, tplg->index, _manifest);
  
  	if (!abi_match)	/* free the duplicated one */
  		kfree(_manifest);
  
  	return 0;
  }
  
  /* validate header magic, size and type */
  static int soc_valid_header(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	if (soc_tplg_get_hdr_offset(tplg) >= tplg->fw->size)
  		return 0;
  
  	if (hdr->size != sizeof(*hdr)) {
  		dev_err(tplg->dev,
  			"ASoC: invalid header size for type %d at offset 0x%lx size 0x%zx.\n",
  			hdr->type, soc_tplg_get_hdr_offset(tplg),
  			tplg->fw->size);
  		return -EINVAL;
  	}
  
  	/* big endian firmware objects not supported atm */
  	if (hdr->magic == cpu_to_be32(SND_SOC_TPLG_MAGIC)) {
  		dev_err(tplg->dev,
  			"ASoC: pass %d big endian not supported header got %x at offset 0x%lx size 0x%zx.\n",
  			tplg->pass, hdr->magic,
  			soc_tplg_get_hdr_offset(tplg), tplg->fw->size);
  		return -EINVAL;
  	}
  
  	if (hdr->magic != SND_SOC_TPLG_MAGIC) {
  		dev_err(tplg->dev,
  			"ASoC: pass %d does not have a valid header got %x at offset 0x%lx size 0x%zx.\n",
  			tplg->pass, hdr->magic,
  			soc_tplg_get_hdr_offset(tplg), tplg->fw->size);
  		return -EINVAL;
  	}
  
  	/* Support ABI from version 4 */
  	if (hdr->abi > SND_SOC_TPLG_ABI_VERSION
  		|| hdr->abi < SND_SOC_TPLG_ABI_VERSION_MIN) {
  		dev_err(tplg->dev,
  			"ASoC: pass %d invalid ABI version got 0x%x need 0x%x at offset 0x%lx size 0x%zx.\n",
  			tplg->pass, hdr->abi,
  			SND_SOC_TPLG_ABI_VERSION, soc_tplg_get_hdr_offset(tplg),
  			tplg->fw->size);
  		return -EINVAL;
  	}
  
  	if (hdr->payload_size == 0) {
  		dev_err(tplg->dev, "ASoC: header has 0 size at offset 0x%lx.\n",
  			soc_tplg_get_hdr_offset(tplg));
  		return -EINVAL;
  	}
  
  	if (tplg->pass == hdr->type)
  		dev_dbg(tplg->dev,
  			"ASoC: Got 0x%x bytes of type %d version %d vendor %d at pass %d\n",
  			hdr->payload_size, hdr->type, hdr->version,
  			hdr->vendor_type, tplg->pass);
  
  	return 1;
  }
  
  /* check header type and call appropriate handler */
  static int soc_tplg_load_header(struct soc_tplg *tplg,
  	struct snd_soc_tplg_hdr *hdr)
  {
  	tplg->pos = tplg->hdr_pos + sizeof(struct snd_soc_tplg_hdr);
  
  	/* check for matching ID */
  	if (hdr->index != tplg->req_index &&
  		tplg->req_index != SND_SOC_TPLG_INDEX_ALL)
  		return 0;
  
  	tplg->index = hdr->index;
  
  	switch (hdr->type) {
  	case SND_SOC_TPLG_TYPE_MIXER:
  	case SND_SOC_TPLG_TYPE_ENUM:
  	case SND_SOC_TPLG_TYPE_BYTES:
  		return soc_tplg_kcontrol_elems_load(tplg, hdr);
  	case SND_SOC_TPLG_TYPE_DAPM_GRAPH:
  		return soc_tplg_dapm_graph_elems_load(tplg, hdr);
  	case SND_SOC_TPLG_TYPE_DAPM_WIDGET:
  		return soc_tplg_dapm_widget_elems_load(tplg, hdr);
  	case SND_SOC_TPLG_TYPE_PCM:
  		return soc_tplg_pcm_elems_load(tplg, hdr);
  	case SND_SOC_TPLG_TYPE_DAI:
  		return soc_tplg_dai_elems_load(tplg, hdr);
  	case SND_SOC_TPLG_TYPE_DAI_LINK:
  	case SND_SOC_TPLG_TYPE_BACKEND_LINK:
  		/* physical link configurations */
  		return soc_tplg_link_elems_load(tplg, hdr);
  	case SND_SOC_TPLG_TYPE_MANIFEST:
  		return soc_tplg_manifest_load(tplg, hdr);
  	default:
  		/* bespoke vendor data object */
  		return soc_tplg_vendor_load(tplg, hdr);
  	}
  
  	return 0;
  }
  
  /* process the topology file headers */
  static int soc_tplg_process_headers(struct soc_tplg *tplg)
  {
  	struct snd_soc_tplg_hdr *hdr;
  	int ret;
  
  	tplg->pass = SOC_TPLG_PASS_START;
  
  	/* process the header types from start to end */
  	while (tplg->pass <= SOC_TPLG_PASS_END) {
  
  		tplg->hdr_pos = tplg->fw->data;
  		hdr = (struct snd_soc_tplg_hdr *)tplg->hdr_pos;
  
  		while (!soc_tplg_is_eof(tplg)) {
  
  			/* make sure header is valid before loading */
  			ret = soc_valid_header(tplg, hdr);
  			if (ret < 0)
  				return ret;
  			else if (ret == 0)
  				break;
  
  			/* load the header object */
  			ret = soc_tplg_load_header(tplg, hdr);
  			if (ret < 0)
  				return ret;
  
  			/* goto next header */
  			tplg->hdr_pos += hdr->payload_size +
  				sizeof(struct snd_soc_tplg_hdr);
  			hdr = (struct snd_soc_tplg_hdr *)tplg->hdr_pos;
  		}
  
  		/* next data type pass */
  		tplg->pass++;
  	}
  
  	/* signal DAPM we are complete */
  	ret = soc_tplg_dapm_complete(tplg);
  	if (ret < 0)
  		dev_err(tplg->dev,
  			"ASoC: failed to initialise DAPM from Firmware\n");
  
  	return ret;
  }
  
  static int soc_tplg_load(struct soc_tplg *tplg)
  {
  	int ret;
  
  	ret = soc_tplg_process_headers(tplg);
  	if (ret == 0)
  		soc_tplg_complete(tplg);
  
  	return ret;
  }
  
  /* load audio component topology from "firmware" file */
  int snd_soc_tplg_component_load(struct snd_soc_component *comp,
  	struct snd_soc_tplg_ops *ops, const struct firmware *fw, u32 id)
  {
  	struct soc_tplg tplg;
  
  	/* setup parsing context */
  	memset(&tplg, 0, sizeof(tplg));
  	tplg.fw = fw;
  	tplg.dev = comp->dev;
  	tplg.comp = comp;
  	tplg.ops = ops;
  	tplg.req_index = id;
  	tplg.io_ops = ops->io_ops;
  	tplg.io_ops_count = ops->io_ops_count;
  	tplg.bytes_ext_ops = ops->bytes_ext_ops;
  	tplg.bytes_ext_ops_count = ops->bytes_ext_ops_count;
  
  	return soc_tplg_load(&tplg);
  }
  EXPORT_SYMBOL_GPL(snd_soc_tplg_component_load);
  
  /* remove this dynamic widget */
  void snd_soc_tplg_widget_remove(struct snd_soc_dapm_widget *w)
  {
  	/* make sure we are a widget */
  	if (w->dobj.type != SND_SOC_DOBJ_WIDGET)
  		return;
  
  	remove_widget(w->dapm->component, &w->dobj, SOC_TPLG_PASS_WIDGET);
  }
  EXPORT_SYMBOL_GPL(snd_soc_tplg_widget_remove);
  
  /* remove all dynamic widgets from this DAPM context */
  void snd_soc_tplg_widget_remove_all(struct snd_soc_dapm_context *dapm,
  	u32 index)
  {
  	struct snd_soc_dapm_widget *w, *next_w;
  
  	list_for_each_entry_safe(w, next_w, &dapm->card->widgets, list) {
  
  		/* make sure we are a widget with correct context */
  		if (w->dobj.type != SND_SOC_DOBJ_WIDGET || w->dapm != dapm)
  			continue;
  
  		/* match ID */
  		if (w->dobj.index != index &&
  			w->dobj.index != SND_SOC_TPLG_INDEX_ALL)
  			continue;
  		/* check and free and dynamic widget kcontrols */
  		snd_soc_tplg_widget_remove(w);
  		snd_soc_dapm_free_widget(w);
  	}
  	snd_soc_dapm_reset_cache(dapm);
  }
  EXPORT_SYMBOL_GPL(snd_soc_tplg_widget_remove_all);
  
  /* remove dynamic controls from the component driver */
  int snd_soc_tplg_component_remove(struct snd_soc_component *comp, u32 index)
  {
  	struct snd_soc_dobj *dobj, *next_dobj;
  	int pass = SOC_TPLG_PASS_END;
  
  	/* process the header types from end to start */
  	while (pass >= SOC_TPLG_PASS_START) {
  
  		/* remove mixer controls */
  		list_for_each_entry_safe(dobj, next_dobj, &comp->dobj_list,
  			list) {
  
  			/* match index */
  			if (dobj->index != index &&
  				index != SND_SOC_TPLG_INDEX_ALL)
  				continue;
  
  			switch (dobj->type) {
  			case SND_SOC_DOBJ_MIXER:
  				remove_mixer(comp, dobj, pass);
  				break;
  			case SND_SOC_DOBJ_ENUM:
  				remove_enum(comp, dobj, pass);
  				break;
  			case SND_SOC_DOBJ_BYTES:
  				remove_bytes(comp, dobj, pass);
  				break;
  			case SND_SOC_DOBJ_WIDGET:
  				remove_widget(comp, dobj, pass);
  				break;
  			case SND_SOC_DOBJ_PCM:
  				remove_dai(comp, dobj, pass);
  				break;
  			case SND_SOC_DOBJ_DAI_LINK:
  				remove_link(comp, dobj, pass);
  				break;
  			default:
  				dev_err(comp->dev, "ASoC: invalid component type %d for removal\n",
  					dobj->type);
  				break;
  			}
  		}
  		pass--;
  	}
  
  	/* let caller know if FW can be freed when no objects are left */
  	return !list_empty(&comp->dobj_list);
  }
  EXPORT_SYMBOL_GPL(snd_soc_tplg_component_remove);
  