usb: device_next: uac2: devicetree descriptor macros
Initial set of macros to generate class specific descriptors based on devicetree nodes. Descriptors are generated as uint8_t array initializer list because there is variable number of entities in between standard USB interface and endpoint descriptors. Because the descriptors are automatically generated there is no real point in trying to generate corresponding C structures (especially that some entity descriptors have variably sized fields in the middle of descriptor, e.g. Clock Selector). Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
This commit is contained in:
Tomasz Moń
Carles Cufí
parent
d76934daeb
commit
4f1b5b11b2
398
subsys/usb/device_next/class/usbd_uac2_macros.h
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398
subsys/usb/device_next/class/usbd_uac2_macros.h
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/*
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* Copyright (c) 2023 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* The macros in this file are not public, applications should not use them.
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* The macros are used to translate devicetree zephyr,uac2 compatible nodes
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* into uint8_t array initializer. The output should be treated as a binary blob
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* for the USB host to use (and parse).
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*/
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#include <zephyr/sys/util.h>
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#ifndef ZEPHYR_INCLUDE_USBD_UAC2_MACROS_H_
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#define ZEPHYR_INCLUDE_USBD_UAC2_MACROS_H_
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#define ARRAY_BIT(idx, value) (value##ull << idx)
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#define U16_LE(value) ((value) & 0xFF), (((value) & 0xFF00) >> 8)
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#define U32_LE(value) \
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((value) & 0xFF), \
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(((value) & 0xFF00) >> 8), \
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(((value) & 0xFF0000) >> 16), \
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(((value) & 0xFF000000) >> 24)
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#define ARRAY_ELEMENT_LESS_THAN_NEXT(node, prop, idx) \
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COND_CODE_1(IS_EQ(idx, UTIL_DEC(DT_PROP_LEN(node, prop))), \
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(1 /* nothing to compare the last element against */), \
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((DT_PROP_BY_IDX(node, prop, idx) < \
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DT_PROP_BY_IDX(node, prop, UTIL_INC(idx)))))
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#define IS_ARRAY_SORTED(node, prop) \
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DT_FOREACH_PROP_ELEM_SEP(node, prop, ARRAY_ELEMENT_LESS_THAN_NEXT, (&&))
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/* A.8 Audio Class-Specific Descriptor Types */
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#define CS_UNDEFINED 0x20
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#define CS_DEVICE 0x21
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#define CS_CONFIGURATION 0x22
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#define CS_STRING 0x23
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#define CS_INTERFACE 0x24
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#define CS_ENDPOINT 0x25
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/* A.9 Audio Class-Specific AC Interface Descriptor Subtypes */
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#define AC_DESCRIPTOR_UNDEFINED 0x00
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#define AC_DESCRIPTOR_HEADER 0x01
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#define AC_DESCRIPTOR_INPUT_TERMINAL 0x02
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#define AC_DESCRIPTOR_OUTPUT_TERMINAL 0x03
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#define AC_DESCRIPTOR_MIXER_UNIT 0x04
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#define AC_DESCRIPTOR_SELECTOR_UNIT 0x05
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#define AC_DESCRIPTOR_FEATURE_UNIT 0x06
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#define AC_DESCRIPTOR_EFFECT_UNIT 0x07
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#define AC_DESCRIPTOR_PROCESSING_UNIT 0x08
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#define AC_DESCRIPTOR_EXTENSION_UNIT 0x09
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#define AC_DESCRIPTOR_CLOCK_SOURCE 0x0A
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#define AC_DESCRIPTOR_CLOCK_SELECTOR 0x0B
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#define AC_DESCRIPTOR_CLOCK_MULTIPLIER 0x0C
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#define AC_DESCRIPTOR_SAMPLE_RATE_CONVERTER 0x0D
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/* A.10 Audio Class-Specific AS Interface Descriptor Subtypes */
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#define AS_DESCRIPTOR_UNDEFINED 0x00
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#define AS_DESCRIPTOR_GENERAL 0x01
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#define AS_DESCRIPTOR_FORMAT_TYPE 0x02
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#define AS_DESCRIPTOR_ENCODER 0x03
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#define AS_DESCRIPTOR_DECODER 0x04
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/* Universal Serial Bus Device Class Definition for Audio Data Formats
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* Release 2.0, May 31, 2006. A.1 Format Type Codes
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* Values are in decimal to facilitate use with IS_EQ() macro.
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*/
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#define FORMAT_TYPE_UNDEFINED 0
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#define FORMAT_TYPE_I 1
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#define FORMAT_TYPE_II 2
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#define FORMAT_TYPE_III 3
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#define FORMAT_TYPE_IV 4
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#define EXT_FORMAT_TYPE_I 129
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#define EXT_FORMAT_TYPE_II 130
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#define EXT_FORMAT_TYPE_III 131
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/* Automatically assign Entity IDs based on entities order in devicetree */
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#define ENTITY_ID(e) UTIL_INC(DT_NODE_CHILD_IDX(e))
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/* Connected Entity ID or 0 if property is not defined. Rely on devicetree
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* "required: true" to fail compilation if mandatory handle (e.g. clock source)
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* is absent.
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*/
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#define CONNECTED_ENTITY_ID(entity, phandle) \
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COND_CODE_1(DT_NODE_HAS_PROP(entity, phandle), \
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(ENTITY_ID(DT_PHANDLE_BY_IDX(entity, phandle, 0))), (0))
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#define ID_IF_TERMINAL_ASSOCIATES_WITH_TARGET(entity, target_id) \
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IF_ENABLED(UTIL_AND(IS_EQ( \
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CONNECTED_ENTITY_ID(entity, assoc_terminal), target_id), \
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UTIL_OR( \
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DT_NODE_HAS_COMPAT(entity, zephyr_uac2_input_terminal), \
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DT_NODE_HAS_COMPAT(entity, zephyr_uac2_output_terminal) \
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)), (ENTITY_ID(entity)))
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/* Find ID of terminal entity associated with given terminal entity. This macro
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* evaluates to "+ 0" if there isn't any terminal entity associated. If there
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* are terminal entities associated with given terminal, then the macro evalues
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* to "IDs + 0" where IDs are the terminal entities ID separated by spaces.
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*
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* If there is exactly one ID then compiler will compute correct value.
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* If there is more than one associated entity, then it will fail at build time
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* (as it should) because the caller expects single integer.
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*/
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#define FIND_ASSOCIATED_TERMINAL(entity) \
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DT_FOREACH_CHILD_VARGS(DT_PARENT(entity), \
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ID_IF_TERMINAL_ASSOCIATES_WITH_TARGET, ENTITY_ID(entity)) + 0
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/* If entity has assoc_terminal property, return the entity ID of associated
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* terminal. Otherwise, search if any other terminal entity points to us and
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* use its ID. If search yields no results then this evaluates to "+ 0" which
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* matches the value USB Audio Class expects in bAssocTerminal if no association
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* exists.
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*
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* This is a workaround for lack of cyclic dependencies support in devicetree.
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*/
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#define ASSOCIATED_TERMINAL_ID(entity) \
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COND_CODE_1(DT_NODE_HAS_PROP(entity, assoc_terminal), \
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(CONNECTED_ENTITY_ID(entity, assoc_terminal)), \
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(FIND_ASSOCIATED_TERMINAL(entity)))
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#define CLOCK_SOURCE_ATTRIBUTES(entity) \
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(DT_ENUM_IDX(entity, clock_type)) | \
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(DT_PROP(entity, sof_synchronized) << 2)
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/* Control properties are optional enums in devicetree that can either be
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* "read-only" or "host-programmable". If the property is missing, then it means
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* that control is not present. Convert the control property into actual values
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* used by USB Audio Class, i.e. 0b00 when control is not present, 0b01 when
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* control is present but read-only and 0b11 when control can be programmed by
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* host. Value 0b10 is not allowed by the specification.
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*/
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#define CONTROL_BITS(entity, control_name, bitshift) \
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COND_CODE_1(DT_NODE_HAS_PROP(entity, control_name), \
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(COND_CODE_0(DT_ENUM_IDX(entity, control_name), \
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((0x1 << bitshift)) /* read-only */, \
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((0x3 << bitshift)) /* host-programmable */)), \
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((0x0 << bitshift)) /* control not present */)
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#define CLOCK_SOURCE_CONTROLS(entity) \
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CONTROL_BITS(entity, frequency_control, 0) | \
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CONTROL_BITS(entity, validity_control, 2)
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#define INPUT_TERMINAL_CONTROLS(entity) \
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CONTROL_BITS(entity, copy_protect_control, 0) | \
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CONTROL_BITS(entity, connector_control, 2) | \
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CONTROL_BITS(entity, overload_control, 4) | \
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CONTROL_BITS(entity, cluster_control, 6) | \
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CONTROL_BITS(entity, underflow_control, 8) | \
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CONTROL_BITS(entity, overflow_control, 10)
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#define OUTPUT_TERMINAL_CONTROLS(entity) \
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CONTROL_BITS(entity, copy_protect_control, 0) | \
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CONTROL_BITS(entity, connector_control, 2) | \
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CONTROL_BITS(entity, overload_control, 4) | \
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CONTROL_BITS(entity, underflow_control, 6) | \
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CONTROL_BITS(entity, overflow_control, 8)
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/* 4.1 Audio Channel Cluster Descriptor */
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#define SPATIAL_LOCATIONS_ARRAY(cluster) \
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DT_PROP(cluster, front_left), \
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DT_PROP(cluster, front_right), \
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DT_PROP(cluster, front_center), \
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DT_PROP(cluster, low_frequency_effects), \
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DT_PROP(cluster, back_left), \
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DT_PROP(cluster, back_right), \
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DT_PROP(cluster, front_left_of_center), \
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DT_PROP(cluster, front_right_of_center), \
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DT_PROP(cluster, back_center), \
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DT_PROP(cluster, side_left), \
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DT_PROP(cluster, side_right), \
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DT_PROP(cluster, top_center), \
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DT_PROP(cluster, top_front_left), \
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DT_PROP(cluster, top_front_center), \
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DT_PROP(cluster, top_front_right), \
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DT_PROP(cluster, top_back_left), \
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DT_PROP(cluster, top_back_center), \
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DT_PROP(cluster, top_back_right), \
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DT_PROP(cluster, top_front_left_of_center), \
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DT_PROP(cluster, top_front_right_of_center), \
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DT_PROP(cluster, left_low_frequency_effects), \
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DT_PROP(cluster, right_low_frequency_effects), \
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DT_PROP(cluster, top_side_left), \
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DT_PROP(cluster, top_side_right), \
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DT_PROP(cluster, bottom_center), \
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DT_PROP(cluster, back_left_of_center), \
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DT_PROP(cluster, back_right_of_center), \
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0, 0, 0, 0, /* D27..D30: Reserved */ \
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DT_PROP(cluster, raw_data)
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#define SPATIAL_LOCATIONS_U32(entity) \
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(FOR_EACH_IDX(ARRAY_BIT, (|), SPATIAL_LOCATIONS_ARRAY(entity)))
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#define NUM_SPATIAL_LOCATIONS(entity) \
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(FOR_EACH(IDENTITY, (+), SPATIAL_LOCATIONS_ARRAY(entity)))
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#define SPATIAL_LOCATIONS(entity) U32_LE(SPATIAL_LOCATIONS_U32(entity))
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/* 4.7.2.1 Clock Source Descriptor */
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#define CLOCK_SOURCE_DESCRIPTOR(entity) \
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0x08, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AC_DESCRIPTOR_CLOCK_SOURCE, /* bDescriptorSubtype */\
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ENTITY_ID(entity), /* bClockID */ \
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CLOCK_SOURCE_ATTRIBUTES(entity), /* bmAttributes */ \
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CLOCK_SOURCE_CONTROLS(entity), /* bmControls */ \
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CONNECTED_ENTITY_ID(entity, assoc_terminal), /* bAssocTerminal */ \
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0x00, /* iClockSource */
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/* 4.7.2.4 Input Terminal Descriptor */
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#define INPUT_TERMINAL_DESCRIPTOR(entity) \
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0x11, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AC_DESCRIPTOR_INPUT_TERMINAL, /* bDescriptorSubtype */\
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ENTITY_ID(entity), /* bTerminalID */ \
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U16_LE(DT_PROP(entity, terminal_type)), /* wTerminalType */ \
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ASSOCIATED_TERMINAL_ID(entity), /* bAssocTerminal */ \
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CONNECTED_ENTITY_ID(entity, clock_source), /* bCSourceID */ \
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NUM_SPATIAL_LOCATIONS(entity), /* bNrChannels */ \
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SPATIAL_LOCATIONS(entity), /* bmChannelConfig */ \
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0x00, /* iChannelNames */ \
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U16_LE(INPUT_TERMINAL_CONTROLS(entity)), /* bmControls */ \
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0x00, /* iTerminal */
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/* 4.7.2.5 Output Terminal Descriptor */
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#define OUTPUT_TERMINAL_DESCRIPTOR(entity) \
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0x0C, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AC_DESCRIPTOR_OUTPUT_TERMINAL, /* bDescriptorSubtype */\
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ENTITY_ID(entity), /* bTerminalID */ \
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U16_LE(DT_PROP(entity, terminal_type)), /* wTerminalType */ \
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ASSOCIATED_TERMINAL_ID(entity), /* bAssocTerminal */ \
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CONNECTED_ENTITY_ID(entity, data_source), /* bSourceID */ \
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CONNECTED_ENTITY_ID(entity, clock_source), /* bCSourceID */ \
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U16_LE(OUTPUT_TERMINAL_CONTROLS(entity)), /* bmControls */ \
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0x00, /* iTerminal */
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#define ENTITY_HEADER(entity) \
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IF_ENABLED(DT_NODE_HAS_COMPAT(entity, zephyr_uac2_clock_source), ( \
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CLOCK_SOURCE_DESCRIPTOR(entity) \
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)) \
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IF_ENABLED(DT_NODE_HAS_COMPAT(entity, zephyr_uac2_input_terminal), ( \
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INPUT_TERMINAL_DESCRIPTOR(entity) \
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)) \
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IF_ENABLED(DT_NODE_HAS_COMPAT(entity, zephyr_uac2_output_terminal), ( \
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OUTPUT_TERMINAL_DESCRIPTOR(entity) \
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))
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#define ENTITY_HEADERS(node) DT_FOREACH_CHILD(node, ENTITY_HEADER)
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#define ENTITY_HEADERS_LENGTH(node) sizeof((uint8_t []){ENTITY_HEADERS(node)})
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#define AUDIO_STREAMING_CONTROLS(node) \
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CONTROL_BITS(entity, active_alternate_setting_control, 0) | \
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CONTROL_BITS(entity, valid_alternate_settings_control, 2)
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/* TODO: Support other format types. Currently the PCM format (0x00000001) is
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* hardcoded and format type is either I or IV depending on whether the
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* interface has isochronous endpoint or not.
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*/
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#define AUDIO_STREAMING_FORMAT_TYPE(node) \
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COND_CODE_0(DT_PROP(node, external_interface), \
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(FORMAT_TYPE_I), (FORMAT_TYPE_IV))
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#define AUDIO_STREAMING_FORMATS(node) U32_LE(0x00000001)
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/* If AudioStreaming is linked to input terminal, obtain the channel cluster
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* configuration from the linked terminal. Otherwise (it has to be connected
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* to output terminal) obtain the channel cluster configuration from data source
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* entity.
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*/
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#define AUDIO_STREAMING_CHANNEL_CLUSTER(node) \
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IF_ENABLED(DT_NODE_HAS_COMPAT(DT_PROP(node, linked_terminal), \
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zephyr_uac2_input_terminal), ( \
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DT_PROP(node, linked_terminal) \
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)) \
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IF_ENABLED(DT_NODE_HAS_COMPAT(DT_PROP(node, linked_terminal), \
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zephyr_uac2_output_terminal), ( \
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DT_PROP(DT_PROP(node, linked_terminal), data_source) \
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))
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#define AUDIO_STREAMING_NUM_SPATIAL_LOCATIONS(node) \
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NUM_SPATIAL_LOCATIONS(AUDIO_STREAMING_CHANNEL_CLUSTER(node))
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#define AUDIO_STREAMING_SPATIAL_LOCATIONS(node) \
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SPATIAL_LOCATIONS(AUDIO_STREAMING_CHANNEL_CLUSTER(node))
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/* 4.9.2 Class-Specific AS Interface Descriptor */
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#define AUDIO_STREAMING_GENERAL_DESCRIPTOR(node) \
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0x10, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AS_DESCRIPTOR_GENERAL, /* bDescriptorSubtype */\
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CONNECTED_ENTITY_ID(node, linked_terminal), /* bTerminalLink */ \
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AUDIO_STREAMING_CONTROLS(node), /* bmControls*/ \
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AUDIO_STREAMING_FORMAT_TYPE(node), /* bFormatType */ \
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AUDIO_STREAMING_FORMATS(node), /* bmFormats */ \
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AUDIO_STREAMING_NUM_SPATIAL_LOCATIONS(node), /* bNrChannels */ \
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AUDIO_STREAMING_SPATIAL_LOCATIONS(node), /* bmChannelConfig */ \
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0x00, /* iChannelNames */
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/* Universal Serial Bus Device Class Definition for Audio Data Formats
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* Release 2.0, May 31, 2006. 2.3.1.6 Type I Format Type Descriptor
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*/
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#define AUDIO_STREAMING_FORMAT_I_TYPE_DESCRIPTOR(node) \
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0x06, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AS_DESCRIPTOR_FORMAT_TYPE, /* bDescriptorSubtype */\
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FORMAT_TYPE_I, /* bFormatType */ \
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DT_PROP(node, subslot_size), /* bSubslotSize */ \
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DT_PROP(node, bit_resolution), /* bBitResolution */
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/* Universal Serial Bus Device Class Definition for Audio Data Formats
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* Release 2.0, May 31, 2006. 2.3.4.1 Type IV Format Type Descriptor
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*/
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#define AUDIO_STREAMING_FORMAT_IV_TYPE_DESCRIPTOR(node) \
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0x04, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AS_DESCRIPTOR_FORMAT_TYPE, /* bDescriptorSubtype */\
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FORMAT_TYPE_IV, /* bFormatType */
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/* 4.9.3 Class-Specific AS Format Type Descriptor */
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#define AUDIO_STREAMING_FORMAT_TYPE_DESCRIPTOR(node) \
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IF_ENABLED(IS_EQ(AUDIO_STREAMING_FORMAT_TYPE(node), FORMAT_TYPE_I), ( \
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AUDIO_STREAMING_FORMAT_I_TYPE_DESCRIPTOR(node))) \
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IF_ENABLED(IS_EQ(AUDIO_STREAMING_FORMAT_TYPE(node), FORMAT_TYPE_IV), ( \
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AUDIO_STREAMING_FORMAT_IV_TYPE_DESCRIPTOR(node)))
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#define AUDIO_STREAMING_INTERFACE_DESCRIPTORS(node) \
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AUDIO_STREAMING_GENERAL_DESCRIPTOR(node) \
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AUDIO_STREAMING_FORMAT_TYPE_DESCRIPTOR(node)
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/* 4.7.2 Class-Specific AC Interface Descriptor */
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#define AC_INTERFACE_HEADER_DESCRIPTOR(node) \
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0x09, /* bLength */ \
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CS_INTERFACE, /* bDescriptorType */ \
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AC_DESCRIPTOR_HEADER, /* bDescriptorSubtype */\
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U16_LE(0x0200), /* bcdADC */ \
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DT_PROP(node, audio_function), /* bCategory */ \
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U16_LE(9 + ENTITY_HEADERS_LENGTH(node)), /* wTotalLength */ \
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0x00, /* bmControls */ \
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#define VALIDATE_INPUT_TERMINAL_ASSOCIATION(entity) \
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UTIL_OR(UTIL_NOT(DT_NODE_HAS_PROP(entity, assoc_terminal)), \
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DT_NODE_HAS_COMPAT(DT_PROP(entity, assoc_terminal), \
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zephyr_uac2_output_terminal))
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#define VALIDATE_OUTPUT_TERMINAL_ASSOCIATION(entity) \
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UTIL_OR(UTIL_NOT(DT_NODE_HAS_PROP(entity, assoc_terminal)), \
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DT_NODE_HAS_COMPAT(DT_PROP(entity, assoc_terminal), \
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zephyr_uac2_input_terminal))
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#define NEEDS_SUBSLOT_SIZE_AND_BIT_RESOLUTION(node) UTIL_OR( \
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UTIL_OR(IS_EQ(AUDIO_STREAMING_FORMAT_TYPE(node), FORMAT_TYPE_I), \
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IS_EQ(AUDIO_STREAMING_FORMAT_TYPE(node), FORMAT_TYPE_III)), \
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UTIL_OR(IS_EQ(AUDIO_STREAMING_FORMAT_TYPE(node), EXT_FORMAT_TYPE_I), \
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IS_EQ(AUDIO_STREAMING_FORMAT_TYPE(node), EXT_FORMAT_TYPE_III)))
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||||
#define VALIDATE_SUBSLOT_SIZE(node) \
|
||||
(DT_PROP(node, subslot_size) >= 1 && DT_PROP(node, subslot_size) <= 4)
|
||||
|
||||
#define VALIDATE_BIT_RESOLUTION(node) \
|
||||
(DT_PROP(node, bit_resolution) <= (DT_PROP(node, subslot_size) * 8))
|
||||
|
||||
#define VALIDATE_LINKED_TERMINAL(node) \
|
||||
UTIL_OR(DT_NODE_HAS_COMPAT(DT_PROP(node, linked_terminal), \
|
||||
zephyr_uac2_input_terminal), \
|
||||
DT_NODE_HAS_COMPAT(DT_PROP(node, linked_terminal), \
|
||||
zephyr_uac2_output_terminal))
|
||||
|
||||
#define VALIDATE_NODE(node) \
|
||||
IF_ENABLED(DT_NODE_HAS_COMPAT(node, zephyr_uac2_clock_source), ( \
|
||||
BUILD_ASSERT(DT_PROP_LEN(node, sampling_frequencies), \
|
||||
"Sampling frequencies array must not be empty"); \
|
||||
BUILD_ASSERT(IS_ARRAY_SORTED(node, sampling_frequencies), \
|
||||
"Sampling frequencies array must be sorted ascending"); \
|
||||
)) \
|
||||
IF_ENABLED(DT_NODE_HAS_COMPAT(node, zephyr_uac2_input_terminal), ( \
|
||||
BUILD_ASSERT(!((SPATIAL_LOCATIONS_U32(node) & BIT(31))) || \
|
||||
SPATIAL_LOCATIONS_U32(node) == BIT(31), \
|
||||
"Raw Data set alongside other spatial locations"); \
|
||||
BUILD_ASSERT(VALIDATE_INPUT_TERMINAL_ASSOCIATION(node), \
|
||||
"Terminals associations must be Input<->Output"); \
|
||||
)) \
|
||||
IF_ENABLED(DT_NODE_HAS_COMPAT(node, zephyr_uac2_output_terminal), ( \
|
||||
BUILD_ASSERT(VALIDATE_OUTPUT_TERMINAL_ASSOCIATION(node), \
|
||||
"Terminals associations must be Input<->Output"); \
|
||||
)) \
|
||||
IF_ENABLED(DT_NODE_HAS_COMPAT(node, zephyr_uac2_audio_streaming), ( \
|
||||
BUILD_ASSERT(VALIDATE_LINKED_TERMINAL(node), \
|
||||
"Linked Terminal must be Input or Output Terminal"); \
|
||||
BUILD_ASSERT(!NEEDS_SUBSLOT_SIZE_AND_BIT_RESOLUTION(node) || \
|
||||
VALIDATE_SUBSLOT_SIZE(node), \
|
||||
"Subslot Size can only be 1, 2, 3 or 4"); \
|
||||
BUILD_ASSERT(!NEEDS_SUBSLOT_SIZE_AND_BIT_RESOLUTION(node) || \
|
||||
VALIDATE_BIT_RESOLUTION(node), \
|
||||
"Bit Resolution must fit inside Subslot Size"); \
|
||||
))
|
||||
|
||||
#endif /* ZEPHYR_INCLUDE_USBD_UAC2_MACROS_H_ */
|
||||
Loading…
Reference in a new issue