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soc-topology.c
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soc-topology.c
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// SPDX-License-Identifier: GPL-2.0+
//
// soc-topology.c -- ALSA SoC Topology
//
// Copyright (C) 2012 Texas Instruments Inc.
// Copyright (C) 2015 Intel Corporation.
//
// Authors: Liam Girdwood <liam.r.girdwood@linux.intel.com>
// K, Mythri P <mythri.p.k@intel.com>
// Prusty, Subhransu S <subhransu.s.prusty@intel.com>
// B, Jayachandran <jayachandran.b@intel.com>
// Abdullah, Omair M <omair.m.abdullah@intel.com>
// Jin, Yao <yao.jin@intel.com>
// Lin, Mengdong <mengdong.lin@intel.com>
//
// Add support to read audio firmware topology alongside firmware text. The
// topology data can contain kcontrols, DAPM graphs, widgets, DAIs, DAI links,
// equalizers, firmware, coefficients etc.
//
// This file only manages the core ALSA and ASoC components, all other bespoke
// firmware topology data is passed to component drivers for bespoke handling.
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/list.h>
#include <linux/firmware.h>
#include <linux/slab.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/soc-topology.h>
#include <sound/tlv.h>
#define SOC_TPLG_MAGIC_BIG_ENDIAN 0x436F5341 /* ASoC in reverse */
/*
* We make several passes over the data (since it wont necessarily be ordered)
* and process objects in the following order. This guarantees the component
* drivers will be ready with any vendor data before the mixers and DAPM objects
* are loaded (that may make use of the vendor data).
*/
#define SOC_TPLG_PASS_MANIFEST 0
#define SOC_TPLG_PASS_VENDOR 1
#define SOC_TPLG_PASS_MIXER 2
#define SOC_TPLG_PASS_WIDGET 3
#define SOC_TPLG_PASS_PCM_DAI 4
#define SOC_TPLG_PASS_GRAPH 5
#define SOC_TPLG_PASS_PINS 6
#define SOC_TPLG_PASS_BE_DAI 7
#define SOC_TPLG_PASS_LINK 8
#define SOC_TPLG_PASS_START SOC_TPLG_PASS_MANIFEST
#define SOC_TPLG_PASS_END SOC_TPLG_PASS_LINK
/* topology context */
struct soc_tplg {
const struct firmware *fw;
/* runtime FW parsing */
const u8 *pos; /* read postion */
const u8 *hdr_pos; /* header position */
unsigned int pass; /* pass number */
/* component caller */
struct device *dev;
struct snd_soc_component *comp;
u32 index; /* current block index */
u32 req_index; /* required index, only loaded/free matching blocks */
/* vendor specific kcontrol operations */
const struct snd_soc_tplg_kcontrol_ops *io_ops;
int io_ops_count;
/* vendor specific bytes ext handlers, for TLV bytes controls */
const struct snd_soc_tplg_bytes_ext_ops *bytes_ext_ops;
int bytes_ext_ops_count;
/* optional fw loading callbacks to component drivers */
struct snd_soc_tplg_ops *ops;
};
static int soc_tplg_process_headers(struct soc_tplg *tplg);
static void soc_tplg_complete(struct soc_tplg *tplg);
static void soc_tplg_denum_remove_texts(struct soc_enum *se);
static void soc_tplg_denum_remove_values(struct soc_enum *se);
/* 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 (le32_to_cpu(chan[i].id) == map)
return le32_to_cpu(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 (le32_to_cpu(chan[i].id) == map)
return le32_to_cpu(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->ops && tplg->ops->vendor_load)
ret = tplg->ops->vendor_load(tplg->comp, tplg->index, hdr);
else {
dev_err(tplg->dev, "ASoC: no vendor load callback for ID %d\n",
hdr->vendor_type);
return -EINVAL;
}
if (ret < 0)
dev_err(tplg->dev,
"ASoC: vendor load failed at hdr offset %ld/0x%lx for type %d:%d\n",
soc_tplg_get_hdr_offset(tplg),
soc_tplg_get_hdr_offset(tplg),
hdr->type, hdr->vendor_type);
return ret;
}
/* 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->ops && tplg->ops->widget_load)
return tplg->ops->widget_load(tplg->comp, tplg->index, w,
tplg_w);
return 0;
}
/* optionally pass new dynamic widget to component driver. This is mainly for
* external widgets where we can assign private data/ops */
static int soc_tplg_widget_ready(struct soc_tplg *tplg,
struct snd_soc_dapm_widget *w, struct snd_soc_tplg_dapm_widget *tplg_w)
{
if (tplg->ops && tplg->ops->widget_ready)
return tplg->ops->widget_ready(tplg->comp, tplg->index, w,
tplg_w);
return 0;
}
/* pass DAI configurations to component driver for extra initialization */
static int soc_tplg_dai_load(struct soc_tplg *tplg,
struct snd_soc_dai_driver *dai_drv,
struct snd_soc_tplg_pcm *pcm, struct snd_soc_dai *dai)
{
if (tplg->ops && tplg->ops->dai_load)
return tplg->ops->dai_load(tplg->comp, tplg->index, dai_drv,
pcm, dai);
return 0;
}
/* pass link configurations to component driver for extra initialization */
static int soc_tplg_dai_link_load(struct soc_tplg *tplg,
struct snd_soc_dai_link *link, struct snd_soc_tplg_link_config *cfg)
{
if (tplg->ops && tplg->ops->link_load)
return tplg->ops->link_load(tplg->comp, tplg->index, link, cfg);
return 0;
}
/* tell the component driver that all firmware has been loaded in this request */
static void soc_tplg_complete(struct soc_tplg *tplg)
{
if (tplg->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, comp->name_prefix, 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 (dobj->control.kcontrol->tlv.p)
p = dobj->control.kcontrol->tlv.p;
snd_ctl_remove(card, dobj->control.kcontrol);
list_del(&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);
if (pass != SOC_TPLG_PASS_MIXER)
return;
if (dobj->ops && dobj->ops->control_unload)
dobj->ops->control_unload(comp, dobj);
snd_ctl_remove(card, dobj->control.kcontrol);
list_del(&dobj->list);
soc_tplg_denum_remove_values(se);
soc_tplg_denum_remove_texts(se);
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, dobj->control.kcontrol);
list_del(&dobj->list);
kfree(sb);
}
/* remove a route */
static void remove_route(struct snd_soc_component *comp,
struct snd_soc_dobj *dobj, int pass)
{
struct snd_soc_dapm_route *route =
container_of(dobj, struct snd_soc_dapm_route, dobj);
if (pass != SOC_TPLG_PASS_GRAPH)
return;
if (dobj->ops && dobj->ops->dapm_route_unload)
dobj->ops->dapm_route_unload(comp, dobj);
list_del(&dobj->list);
kfree(route);
}
/* 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;
snd_ctl_remove(card, kcontrol);
/* free enum kcontrol's dvalues and dtexts */
soc_tplg_denum_remove_values(se);
soc_tplg_denum_remove_texts(se);
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);
list_del(&dobj->list);
/* 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);
struct snd_soc_dai *dai;
if (pass != SOC_TPLG_PASS_PCM_DAI)
return;
if (dobj->ops && dobj->ops->dai_unload)
dobj->ops->dai_unload(comp, dobj);
for_each_component_dais(comp, dai)
if (dai->driver == dai_drv)
dai->driver = NULL;
kfree(dai_drv->playback.stream_name);
kfree(dai_drv->capture.stream_name);
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);
list_del(&dobj->list);
snd_soc_remove_pcm_runtime(comp->card,
snd_soc_get_pcm_runtime(comp->card, link));
kfree(link->name);
kfree(link->stream_name);
kfree(link->cpus->dai_name);
kfree(link);
}
/* unload dai link */
static void remove_backend_link(struct snd_soc_component *comp,
struct snd_soc_dobj *dobj, int pass)
{
if (pass != SOC_TPLG_PASS_LINK)
return;
if (dobj->ops && dobj->ops->link_unload)
dobj->ops->link_unload(comp, dobj);
/*
* We don't free the link here as what remove_link() do since BE
* links are not allocated by topology.
* We however need to reset the dobj type to its initial values
*/
dobj->type = SND_SOC_DOBJ_NONE;
list_del(&dobj->list);
}
/* 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 (le32_to_cpu(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;
/*
* When a topology-based implementation abuses the
* control interface and uses bytes_ext controls of
* more than 512 bytes, we need to disable the size
* checks, otherwise accesses to such controls will
* return an -EINVAL error and prevent the card from
* being configured.
*/
if (IS_ENABLED(CONFIG_SND_CTL_VALIDATION) && sbe->max > 512)
k->access |= SNDRV_CTL_ELEM_ACCESS_SKIP_CHECK;
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 == le32_to_cpu(be->ext_ops.put))
sbe->put = ext_ops[i].put;
if (!sbe->get &&
ext_ops[i].id == le32_to_cpu(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 == le32_to_cpu(hdr->ops.put))
k->put = ops[i].put;
if (k->get == NULL && ops[i].id == le32_to_cpu(hdr->ops.get))
k->get = ops[i].get;
if (k->info == NULL && ops[i].id == le32_to_cpu(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 == le32_to_cpu(hdr->ops.put))
k->put = ops[i].put;
if (k->get == NULL && ops[i].id == le32_to_cpu(hdr->ops.get))
k->get = ops[i].get;
if (k->info == NULL && ops[i].id == le32_to_cpu(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->ops && tplg->ops->control_load)
return tplg->ops->control_load(tplg->comp, tplg->index, k,
hdr);
return 0;
}
static int soc_tplg_create_tlv_db_scale(struct soc_tplg *tplg,
struct snd_kcontrol_new *kc, struct snd_soc_tplg_tlv_dbscale *scale)
{
unsigned int item_len = 2 * sizeof(unsigned int);
unsigned int *p;
p = kzalloc(item_len + 2 * sizeof(unsigned int), GFP_KERNEL);
if (!p)
return -ENOMEM;
p[0] = SNDRV_CTL_TLVT_DB_SCALE;
p[1] = item_len;
p[2] = le32_to_cpu(scale->min);
p[3] = (le32_to_cpu(scale->step) & TLV_DB_SCALE_MASK)
| (le32_to_cpu(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;
u32 access = le32_to_cpu(tc->access);
if (!(access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE))
return 0;
if (!(access & SNDRV_CTL_ELEM_ACCESS_TLV_CALLBACK)) {
tplg_tlv = &tc->tlv;
switch (le32_to_cpu(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;
int err = 0;
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) +
le32_to_cpu(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 = le32_to_cpu(be->hdr.access);
sbe->max = le32_to_cpu(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);
break;
}
/* 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);
break;
}
/* 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);
break;
}
list_add(&sbe->dobj.list, &tplg->comp->dobj_list);
}
return err;
}
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;
int err = 0;
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) +
le32_to_cpu(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 = le32_to_cpu(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 = le32_to_cpu(mc->max);
sm->min = le32_to_cpu(mc->min);
sm->invert = le32_to_cpu(mc->invert);
sm->platform_max = le32_to_cpu(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);
break;
}
/* create any TLV data */
err = soc_tplg_create_tlv(tplg, &kc, &mc->hdr);
if (err < 0) {
dev_err(tplg->dev, "ASoC: failed to create TLV %s\n",
mc->hdr.name);
kfree(sm);
break;
}
/* 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);
soc_tplg_free_tlv(tplg, &kc);
kfree(sm);
break;
}
/* 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);
break;
}
list_add(&sm->dobj.list, &tplg->comp->dobj_list);
}
return err;
}
static int soc_tplg_denum_create_texts(struct soc_enum *se,
struct snd_soc_tplg_enum_control *ec)
{
int i, ret;
se->dobj.control.dtexts =
kcalloc(le32_to_cpu(ec->items), sizeof(char *), GFP_KERNEL);
if (se->dobj.control.dtexts == NULL)
return -ENOMEM;
for (i = 0; i < le32_to_cpu(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->items = le32_to_cpu(ec->items);
se->texts = (const char * const *)se->dobj.control.dtexts;
return 0;
err:
se->items = i;
soc_tplg_denum_remove_texts(se);
return ret;
}
static inline void soc_tplg_denum_remove_texts(struct soc_enum *se)
{
int i = se->items;
for (--i; i >= 0; i--)
kfree(se->dobj.control.dtexts[i]);
kfree(se->dobj.control.dtexts);
}
static int soc_tplg_denum_create_values(struct soc_enum *se,
struct snd_soc_tplg_enum_control *ec)
{
int i;
if (le32_to_cpu(ec->items) > sizeof(*ec->values))
return -EINVAL;
se->dobj.control.dvalues = kzalloc(le32_to_cpu(ec->items) *
sizeof(u32),
GFP_KERNEL);
if (!se->dobj.control.dvalues)
return -ENOMEM;
/* convert from little-endian */
for (i = 0; i < le32_to_cpu(ec->items); i++) {
se->dobj.control.dvalues[i] = le32_to_cpu(ec->values[i]);
}
return 0;
}