mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 00:58:17 +07:00
104 lines
2.4 KiB
C
104 lines
2.4 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
// Copyright (c) 2015-2019 Intel Corporation
|
||
|
|
|
||
|
|
#include <linux/acpi.h>
|
||
|
|
#include <sound/intel-nhlt.h>
|
||
|
|
|
||
|
|
#define NHLT_ACPI_HEADER_SIG "NHLT"
|
||
|
|
|
||
|
|
/* Unique identification for getting NHLT blobs */
|
||
|
|
static guid_t osc_guid =
|
||
|
|
GUID_INIT(0xA69F886E, 0x6CEB, 0x4594,
|
||
|
|
0xA4, 0x1F, 0x7B, 0x5D, 0xCE, 0x24, 0xC5, 0x53);
|
||
|
|
|
||
|
|
struct nhlt_acpi_table *intel_nhlt_init(struct device *dev)
|
||
|
|
{
|
||
|
|
acpi_handle handle;
|
||
|
|
union acpi_object *obj;
|
||
|
|
struct nhlt_resource_desc *nhlt_ptr;
|
||
|
|
struct nhlt_acpi_table *nhlt_table = NULL;
|
||
|
|
|
||
|
|
handle = ACPI_HANDLE(dev);
|
||
|
|
if (!handle) {
|
||
|
|
dev_err(dev, "Didn't find ACPI_HANDLE\n");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
obj = acpi_evaluate_dsm(handle, &osc_guid, 1, 1, NULL);
|
||
|
|
|
||
|
|
if (!obj)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (obj->type != ACPI_TYPE_BUFFER) {
|
||
|
|
dev_dbg(dev, "No NHLT table found\n");
|
||
|
|
ACPI_FREE(obj);
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
nhlt_ptr = (struct nhlt_resource_desc *)obj->buffer.pointer;
|
||
|
|
if (nhlt_ptr->length)
|
||
|
|
nhlt_table = (struct nhlt_acpi_table *)
|
||
|
|
memremap(nhlt_ptr->min_addr, nhlt_ptr->length,
|
||
|
|
MEMREMAP_WB);
|
||
|
|
ACPI_FREE(obj);
|
||
|
|
if (nhlt_table &&
|
||
|
|
(strncmp(nhlt_table->header.signature,
|
||
|
|
NHLT_ACPI_HEADER_SIG,
|
||
|
|
strlen(NHLT_ACPI_HEADER_SIG)) != 0)) {
|
||
|
|
memunmap(nhlt_table);
|
||
|
|
dev_err(dev, "NHLT ACPI header signature incorrect\n");
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
return nhlt_table;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(intel_nhlt_init);
|
||
|
|
|
||
|
|
void intel_nhlt_free(struct nhlt_acpi_table *nhlt)
|
||
|
|
{
|
||
|
|
memunmap((void *)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;
|
||
|
|
unsigned int dmic_geo = 0;
|
||
|
|
u8 j;
|
||
|
|
|
||
|
|
if (!nhlt)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
epnt = (struct nhlt_endpoint *)nhlt->desc;
|
||
|
|
|
||
|
|
for (j = 0; j < nhlt->endpoint_count; j++) {
|
||
|
|
if (epnt->linktype == NHLT_LINK_DMIC) {
|
||
|
|
cfg = (struct nhlt_dmic_array_config *)
|
||
|
|
(epnt->config.caps);
|
||
|
|
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;
|
||
|
|
|
||
|
|
default:
|
||
|
|
dev_warn(dev, "undefined DMIC array_type 0x%0x\n",
|
||
|
|
cfg->array_type);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
epnt = (struct nhlt_endpoint *)((u8 *)epnt + epnt->length);
|
||
|
|
}
|
||
|
|
|
||
|
|
return dmic_geo;
|
||
|
|
}
|
||
|
|
EXPORT_SYMBOL_GPL(intel_nhlt_get_dmic_geo);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_DESCRIPTION("Intel NHLT driver");
|