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// SPDX-License-Identifier: GPL-2.0-only
// Copyright (c) 2015-2019 Intel Corporation
#include <linux/acpi.h>
#include <sound/intel-nhlt.h>
struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
{
struct nhlt_acpi_table *nhlt;
acpi_status status;
status = acpi_get_table(ACPI_SIG_NHLT, 0,
(struct acpi_table_header **)&nhlt);
if (ACPI_FAILURE(status)) {
dev_warn(dev, "NHLT table not found\n");
return NULL;
}
return nhlt;
}
EXPORT_SYMBOL_GPL(intel_nhlt_init);
void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
{
acpi_put_table((struct acpi_table_header *)nhlt);
}
EXPORT_SYMBOL_GPL(intel_nhlt_free);
int intel_nhlt_get_dmic_geo(struct device *dev, struct nhlt_acpi_table *nhlt)
{
struct nhlt_endpoint *epnt;
struct nhlt_dmic_array_config *cfg;
struct nhlt_vendor_dmic_array_config *cfg_vendor;
struct nhlt_fmt *fmt_configs;
unsigned int dmic_geo = 0;
u16 max_ch = 0;
u8 i, j;
if (!nhlt)
return 0;
if (nhlt->header.length <= sizeof(struct acpi_table_header)) {
dev_warn(dev, "Invalid DMIC description table\n");
return 0;
}
for (j = 0, epnt = nhlt->desc; j < nhlt->endpoint_count; j++,
epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length)) {
if (epnt->linktype != NHLT_LINK_DMIC)
continue;
cfg = (struct nhlt_dmic_array_config *)(epnt->config.caps);
fmt_configs = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
/* find max number of channels based on format_configuration */
if (fmt_configs->fmt_count) {
dev_dbg(dev, "%s: found %d format definitions\n",
__func__, fmt_configs->fmt_count);
for (i = 0; i < fmt_configs->fmt_count; i++) {
struct wav_fmt_ext *fmt_ext;
fmt_ext = &fmt_configs->fmt_config[i].fmt_ext;
if (fmt_ext->fmt.channels > max_ch)
max_ch = fmt_ext->fmt.channels;
}
dev_dbg(dev, "%s: max channels found %d\n", __func__, max_ch);
} else {
dev_dbg(dev, "%s: No format information found\n", __func__);
}
if (cfg->device_config.config_type != NHLT_CONFIG_TYPE_MIC_ARRAY) {
dmic_geo = max_ch;
} else {
switch (cfg->array_type) {
case NHLT_MIC_ARRAY_2CH_SMALL:
case NHLT_MIC_ARRAY_2CH_BIG:
dmic_geo = MIC_ARRAY_2CH;
break;
case NHLT_MIC_ARRAY_4CH_1ST_GEOM:
case NHLT_MIC_ARRAY_4CH_L_SHAPED:
case NHLT_MIC_ARRAY_4CH_2ND_GEOM:
dmic_geo = MIC_ARRAY_4CH;
break;
case NHLT_MIC_ARRAY_VENDOR_DEFINED:
cfg_vendor = (struct nhlt_vendor_dmic_array_config *)cfg;
dmic_geo = cfg_vendor->nb_mics;
break;
default:
dev_warn(dev, "%s: undefined DMIC array_type 0x%0x\n",
__func__, cfg->array_type);
}
if (dmic_geo > 0) {
dev_dbg(dev, "%s: Array with %d dmics\n", __func__, dmic_geo);
}
if (max_ch > dmic_geo) {
dev_dbg(dev, "%s: max channels %d exceed dmic number %d\n",
__func__, max_ch, dmic_geo);
}
}
}
dev_dbg(dev, "%s: dmic number %d max_ch %d\n",
__func__, dmic_geo, max_ch);
return dmic_geo;
}
EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
bool intel_nhlt_has_endpoint_type(struct nhlt_acpi_table *nhlt, u8 link_type)
{
struct nhlt_endpoint *epnt;
int i;
if (!nhlt)
return false;
epnt = (struct nhlt_endpoint *)nhlt->desc;
for (i = 0; i < nhlt->endpoint_count; i++) {
if (epnt->linktype == link_type)
return true;
epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
}
return false;
}
EXPORT_SYMBOL(intel_nhlt_has_endpoint_type);
static struct nhlt_specific_cfg *
nhlt_get_specific_cfg(struct device *dev, struct nhlt_fmt *fmt, u8 num_ch,
u32 rate, u8 vbps, u8 bps)
{
struct nhlt_fmt_cfg *cfg = fmt->fmt_config;
struct wav_fmt *wfmt;
u16 _bps, _vbps;
int i;
dev_dbg(dev, "Endpoint format count=%d\n", fmt->fmt_count);
for (i = 0; i < fmt->fmt_count; i++) {
wfmt = &cfg->fmt_ext.fmt;
_bps = wfmt->bits_per_sample;
_vbps = cfg->fmt_ext.sample.valid_bits_per_sample;
dev_dbg(dev, "Endpoint format: ch=%d fmt=%d/%d rate=%d\n",
wfmt->channels, _vbps, _bps, wfmt->samples_per_sec);
if (wfmt->channels == num_ch && wfmt->samples_per_sec == rate &&
vbps == _vbps && bps == _bps)
return &cfg->config;
cfg = (struct nhlt_fmt_cfg *)(cfg->config.caps + cfg->config.size);
}
return NULL;
}
static bool nhlt_check_ep_match(struct device *dev, struct nhlt_endpoint *epnt,
u32 bus_id, u8 link_type, u8 dir, u8 dev_type)
{
dev_dbg(dev, "Endpoint: vbus_id=%d link_type=%d dir=%d dev_type = %d\n",
epnt->virtual_bus_id, epnt->linktype,
epnt->direction, epnt->device_type);
if ((epnt->virtual_bus_id != bus_id) ||
(epnt->linktype != link_type) ||
(epnt->direction != dir))
return false;
/* link of type DMIC bypasses device_type check */
return epnt->linktype == NHLT_LINK_DMIC ||
epnt->device_type == dev_type;
}
struct nhlt_specific_cfg *
intel_nhlt_get_endpoint_blob(struct device *dev, struct nhlt_acpi_table *nhlt,
u32 bus_id, u8 link_type, u8 vbps, u8 bps,
u8 num_ch, u32 rate, u8 dir, u8 dev_type)
{
struct nhlt_specific_cfg *cfg;
struct nhlt_endpoint *epnt;
struct nhlt_fmt *fmt;
int i;
if (!nhlt)
return NULL;
dev_dbg(dev, "Looking for configuration:\n");
dev_dbg(dev, " vbus_id=%d link_type=%d dir=%d, dev_type=%d\n",
bus_id, link_type, dir, dev_type);
dev_dbg(dev, " ch=%d fmt=%d/%d rate=%d\n", num_ch, vbps, bps, rate);
dev_dbg(dev, "Endpoint count=%d\n", nhlt->endpoint_count);
epnt = (struct nhlt_endpoint *)nhlt->desc;
for (i = 0; i < nhlt->endpoint_count; i++) {
if (nhlt_check_ep_match(dev, epnt, bus_id, link_type, dir, dev_type)) {
fmt = (struct nhlt_fmt *)(epnt->config.caps + epnt->config.size);
cfg = nhlt_get_specific_cfg(dev, fmt, num_ch, rate, vbps, bps);
if (cfg)
return cfg;
}
epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
}
return NULL;
}
EXPORT_SYMBOL(intel_nhlt_get_endpoint_blob);
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