/*
 * 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>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 *  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

/*
 * Old version of ABI structs, supported for backward compatibility.
 */

/* Manifest v4 */
struct snd_soc_tplg_manifest_v4 {
        __le32 size;            /* in bytes of this structure */
        __le32 control_elems;   /* number of control elements */
        __le32 widget_elems;    /* number of widget elements */
        __le32 graph_elems;     /* number of graph elements */
        __le32 pcm_elems;       /* number of PCM elements */
        __le32 dai_link_elems;  /* number of DAI link elements */
        struct snd_soc_tplg_private priv;
} __packed;

/* Stream Capabilities v4 */
struct snd_soc_tplg_stream_caps_v4 {
        __le32 size;            /* in bytes of this structure */
        char name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
        __le64 formats; /* supported formats SNDRV_PCM_FMTBIT_* */
        __le32 rates;           /* supported rates SNDRV_PCM_RATE_* */
        __le32 rate_min;        /* min rate */
        __le32 rate_max;        /* max rate */
        __le32 channels_min;    /* min channels */
        __le32 channels_max;    /* max channels */
        __le32 periods_min;     /* min number of periods */
        __le32 periods_max;     /* max number of periods */
        __le32 period_size_min; /* min period size bytes */
        __le32 period_size_max; /* max period size bytes */
        __le32 buffer_size_min; /* min buffer size bytes */
        __le32 buffer_size_max; /* max buffer size bytes */
} __packed;

/* PCM v4 */
struct snd_soc_tplg_pcm_v4 {
        __le32 size;            /* in bytes of this structure */
        char pcm_name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
        char dai_name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN];
        __le32 pcm_id;          /* unique ID - used to match with DAI link */
        __le32 dai_id;          /* unique ID - used to match */
        __le32 playback;        /* supports playback mode */
        __le32 capture;         /* supports capture mode */
        __le32 compress;        /* 1 = compressed; 0 = PCM */
        struct snd_soc_tplg_stream stream[SND_SOC_TPLG_STREAM_CONFIG_MAX]; /* for DAI link */
        __le32 num_streams;     /* number of streams */
        struct snd_soc_tplg_stream_caps_v4 caps[2]; /* playback and capture for DAI */
} __packed;

/* Physical link config v4 */
struct snd_soc_tplg_link_config_v4 {
        __le32 size;            /* in bytes of this structure */
        __le32 id;              /* unique ID - used to match */
        struct snd_soc_tplg_stream stream[SND_SOC_TPLG_STREAM_CONFIG_MAX]; /* supported configs playback and captrure */
        __le32 num_streams;     /* number of streams */
} __packed;

/* 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, 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, 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, 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)
{
        if (tplg->comp && tplg->ops && tplg->ops->dai_load)
                return tplg->ops->dai_load(tplg->comp, dai_drv);

        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)
{
        if (tplg->comp && tplg->ops && tplg->ops->link_load)
                return tplg->ops->link_load(tplg->comp, link);

        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, 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 =
                kzalloc(sizeof(char *) * ec->items, 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;
}

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;

                /* 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);
        }

        /* pass control to component driver for optional further init */
        ret = soc_tplg_dai_load(tplg, dai_drv);
        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);
        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 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;
                fsync_master = hw_config->fsync_master;
                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);
        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);
        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_err(tplg->dev, "ASoC: invalid manifest size\n");
                return -EINVAL;
        }

        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, _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);