333 lines
9.4 KiB
C
333 lines
9.4 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright 2015 Google, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _NHLT_H_
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#define _NHLT_H_
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#include <stdint.h>
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#include <stddef.h>
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struct nhlt;
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struct nhlt_endpoint;
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struct nhlt_format;
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struct nhlt_format_config;
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/*
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* Non HD Audio ACPI support. This table is typically used for Intel Smart
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* Sound Technology DSP. It provides a way to encode opaque settings in
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* the ACPI tables.
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*
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* While the structure fields of the NHLT structs are exposed below
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* the SoC/chipset code should be the only other user manipulating the
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* fields directly aside from the library itself.
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*
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* The NHLT table consists of endpoints which in turn contain different
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* supporting stream formats. Each endpoint may contain a device specific
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* configuration payload as well as each stream format.
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*
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* Most code should use the SoC variants of the functions because
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* there is required logic needed to be performed by the SoC. The SoC
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* code should be abstracting the inner details of these functions that
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* specically apply to NHLT objects for that SoC.
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*
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* An example sequence:
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*
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* nhlt = nhlt_init()
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* ep = nhlt_add_endpoint()
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* nhlt_endpoint_append_config(ep)
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* nhlt_endpoint_add_formats(ep)
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* nhlt_soc_serialize()
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*/
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/* Obtain an nhlt object for adding endpoints. Returns NULL on error. */
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struct nhlt *nhlt_init(void);
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/* Return the size of the NHLT table including APCI header. */
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size_t nhlt_current_size(struct nhlt *nhlt);
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/*
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* Helper functions for adding NHLT devices utilizing an nhlt_endp_descriptor
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* to drive the logic.
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*/
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struct nhlt_endp_descriptor {
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/* NHLT endpoint types. */
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int link;
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int device;
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int direction;
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uint16_t vid;
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uint16_t did;
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/* Optional endpoint specific configuration data. */
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const void *cfg;
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size_t cfg_size;
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/* Formats supported for endpoint. */
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const struct nhlt_format_config *formats;
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size_t num_formats;
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};
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/*
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* Add the number of endpoints described by each descriptor. The virtual bus
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* id for each descriptor is the default value of 0.
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* Returns < 0 on error, 0 on success.
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*/
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int nhlt_add_endpoints(struct nhlt *nhlt,
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const struct nhlt_endp_descriptor *epds,
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size_t num_epds);
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/*
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* Add the number of endpoints associated with a single NHLT SSP instance id.
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* Each endpoint described in the endpoint descriptor array uses the provided
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* virtual bus id. Returns < 0 on error, 0 on success.
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*/
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int nhlt_add_ssp_endpoints(struct nhlt *nhlt, int virtual_bus_id,
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const struct nhlt_endp_descriptor *epds, size_t num_epds);
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/*
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* Add endpoint to NHLT object. Returns NULL on error.
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*
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* generic nhlt_add_endpoint() is called by the SoC code to provide
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* the specific assumptions/uses for NHLT for that platform. All fields
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* are the NHLT enumerations found within this header file.
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*/
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struct nhlt_endpoint *nhlt_add_endpoint(struct nhlt *nhlt, int link_type,
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int device_type, int dir,
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uint16_t vid, uint16_t did);
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/*
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* Append blob of configuration to the endpoint proper. Returns 0 on
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* success, < 0 on error. A copy of the configuration is made so any
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* resources pointed to by config can be freed after the call.
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*/
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int nhlt_endpoint_append_config(struct nhlt_endpoint *endpoint,
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const void *config, size_t config_sz);
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/* Add a format type to the provided endpoint. Returns NULL on error. */
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struct nhlt_format *nhlt_add_format(struct nhlt_endpoint *endpoint,
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int num_channels,
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int sample_freq_khz,
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int container_bits_per_sample,
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int valid_bits_per_sample,
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uint32_t speaker_mask);
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/*
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* Append blob of configuration to the format proper. Returns 0 on
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* success, < 0 on error. A copy of the configuration is made so any
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* resources pointed to by config can be freed after the call.
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*/
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int nhlt_format_append_config(struct nhlt_format *format, const void *config,
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size_t config_sz);
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/*
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* Add num_formats described by formats to the endpoint. This function
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* effectively wraps nhlt_add_format() and nhlt_format_config() using the
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* data found in each nhlt_format_config object. Returns 0 on success, < 0
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* on error.
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*/
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int nhlt_endpoint_add_formats(struct nhlt_endpoint *endpoint,
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const struct nhlt_format_config *formats,
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size_t num_formats);
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/*
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* Increment the instance id for a given link type. This function is
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* used for marking a device being completely added to the NHLT object.
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* Subsequent endpoints added to the nhlt object with the same link type
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* will use incremented instance id.
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*/
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void nhlt_next_instance(struct nhlt *nhlt, int link_type);
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/*
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* Serialize NHLT object to ACPI table. Take in the beginning address of where
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* the table will reside and return the address of the next ACPI table. On
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* error 0 will be returned. The NHLT object is no longer valid after this
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* function is called.
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*/
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uintptr_t nhlt_serialize(struct nhlt *nhlt, uintptr_t acpi_addr);
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/*
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* Serialize NHLT object to ACPI table. Take in the beginning address of where
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* the table will reside oem_id and oem_table_id and return the address of the
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* next ACPI table. On error 0 will be returned. The NHLT object is no longer
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* valid after thisfunction is called.
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*/
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uintptr_t nhlt_serialize_oem_overrides(struct nhlt *nhlt, uintptr_t acpi_addr,
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const char *oem_id, const char *oem_table_id);
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/*
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* While very similar to nhlt_serialize() the SoC specific function allows
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* the chipset to perform any needed accounting work such as updating ACPI
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* field references for the serialized structure.
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*/
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uintptr_t nhlt_soc_serialize(struct nhlt *nhlt, uintptr_t acpi_addr);
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/*
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* While very similar to nhlt_serialize_oem_overrides() the SoC specific
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* function allows the chipset to perform any needed accounting work such
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* as updating ACPI field references for the serialized structure.
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*/
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uintptr_t nhlt_soc_serialize_oem_overrides(struct nhlt *nhlt,
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uintptr_t acpi_addr, const char *oem_id, const char *oem_table_id);
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/* Link and device types. */
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enum {
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NHLT_LINK_HDA,
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NHLT_LINK_DSP,
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NHLT_LINK_PDM,
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NHLT_LINK_SSP,
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NHLT_MAX_LINK_TYPES,
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};
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enum {
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NHLT_SSP_DEV_BT, /* Bluetooth */
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NHLT_SSP_DEV_MODEM,
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NHLT_SSP_DEV_FM,
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NHLT_SSP_DEV_RESERVED,
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NHLT_SSP_DEV_I2S = 4,
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};
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enum {
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NHLT_PDM_DEV,
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};
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/* Endpoint direction. */
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enum {
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NHLT_DIR_RENDER,
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NHLT_DIR_CAPTURE,
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NHLT_DIR_BIDIRECTIONAL,
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};
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/* Channel Mask for an endpoint. While they are prefixed with 'SPEAKER' the
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* channel masks are also used for capture devices. */
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enum {
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SPEAKER_FRONT_LEFT = 1 << 0,
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SPEAKER_FRONT_RIGHT = 1 << 1,
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SPEAKER_FRONT_CENTER = 1 << 2,
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SPEAKER_LOW_FREQUENCY = 1 << 3,
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SPEAKER_BACK_LEFT = 1 << 4,
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SPEAKER_BACK_RIGHT = 1 << 5,
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SPEAKER_FRONT_LEFT_OF_CENTER = 1 << 6,
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SPEAKER_FRONT_RIGHT_OF_CENTER = 1 << 7,
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SPEAKER_BACK_CENTER = 1 << 8,
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SPEAKER_SIDE_LEFT = 1 << 9,
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SPEAKER_SIDE_RIGHT = 1 << 10,
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SPEAKER_TOP_CENTER = 1 << 11,
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SPEAKER_TOP_FRONT_LEFT = 1 << 12,
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SPEAKER_TOP_FRONT_CENTER = 1 << 13,
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SPEAKER_TOP_FRONT_RIGHT = 1 << 14,
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SPEAKER_TOP_BACK_LEFT = 1 << 15,
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SPEAKER_TOP_BACK_CENTER = 1 << 16,
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SPEAKER_TOP_BACK_RIGHT = 1 << 17,
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};
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/* Supporting structures. Only SoC/chipset and the library code directly should
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* be manipulating these structures. */
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struct sub_format {
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uint32_t data1;
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uint16_t data2;
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uint16_t data3;
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uint8_t data4[8];
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};
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struct nhlt_specific_config {
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uint32_t size;
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void *capabilities;
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};
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struct nhlt_waveform {
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uint16_t tag;
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uint16_t num_channels;
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uint32_t samples_per_second;
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uint32_t bytes_per_second;
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uint16_t block_align;
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uint16_t bits_per_sample;
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uint16_t extra_size;
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uint16_t valid_bits_per_sample;
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uint32_t channel_mask;
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struct sub_format sub_format;
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};
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struct nhlt_format {
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struct nhlt_waveform waveform;
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struct nhlt_specific_config config;
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};
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/*
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* This struct is used by nhlt_endpoint_add_formats() for easily adding
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* waveform formats with associated settings file.
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*/
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struct nhlt_format_config {
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int num_channels;
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int sample_freq_khz;
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int container_bits_per_sample;
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int valid_bits_per_sample;
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uint32_t speaker_mask;
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const char *settings_file;
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};
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/* Arbitrary max number of formats per endpoint. */
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#define MAX_FORMATS 2
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struct nhlt_endpoint {
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uint32_t length;
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uint8_t link_type;
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uint8_t instance_id;
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uint16_t vendor_id;
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uint16_t device_id;
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uint16_t revision_id;
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uint32_t subsystem_id;
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uint8_t device_type;
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uint8_t direction;
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uint8_t virtual_bus_id;
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struct nhlt_specific_config config;
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uint8_t num_formats;
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struct nhlt_format formats[MAX_FORMATS];
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};
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#define MAX_ENDPOINTS 8
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struct nhlt {
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uint8_t num_endpoints;
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struct nhlt_endpoint endpoints[MAX_ENDPOINTS];
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uint8_t current_instance_id[NHLT_MAX_LINK_TYPES];
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};
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struct nhlt_tdm_config {
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uint8_t virtual_slot;
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uint8_t config_type;
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};
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enum {
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NHLT_TDM_BASIC,
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NHLT_TDM_MIC_ARRAY,
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};
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struct nhlt_dmic_array_config {
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struct nhlt_tdm_config tdm_config;
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uint8_t array_type;
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};
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/*
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* Microphone array definitions may be found here:
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* https://msdn.microsoft.com/en-us/library/windows/hardware/dn613960%28v=vs.85%29.aspx
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*/
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enum {
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NHLT_MIC_ARRAY_2CH_SMALL = 0xa,
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NHLT_MIC_ARRAY_2CH_BIG = 0xb,
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NHLT_MIC_ARRAY_4CH_1ST_GEOM = 0xc,
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NHLT_MIC_ARRAY_4CH_L_SHAPED = 0xd,
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NHLT_MIC_ARRAY_4CH_2ND_GEOM = 0xe,
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NHLT_MIC_ARRAY_VENDOR_DEFINED = 0xf,
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};
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#endif
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