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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Host Stack */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/* Include necessary system files. */ |
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#define UX_SOURCE_CODE |
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#include "ux_api.h" |
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#include "ux_host_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_host_stack_device_string_get PORTABLE C */ |
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/* 6.1.10 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function obtains the device string descriptor. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* device Pointer to device instance */ |
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/* descriptor_buffer Pointer to a buffer to fill */ |
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/* LANGID or STRING descriptor */ |
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/* length Length of buffer */ |
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/* language_id 0 to obtain LANGID descriptor */ |
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/* valid language ID to obtain */ |
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/* string descriptor */ |
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/* string_index Index of the string */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_host_stack_transfer_request Process transfer request */ |
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/* _ux_utility_semaphore_get Get Semaphore */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_host_stack_device_string_get(UX_DEVICE *device, UCHAR *descriptor_buffer, ULONG length, ULONG language_id, ULONG string_index) |
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{ |
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#if defined(UX_HOST_STANDALONE) |
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UX_INTERRUPT_SAVE_AREA |
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#endif |
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UX_ENDPOINT *control_endpoint; |
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UX_TRANSFER *transfer_request; |
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UINT status; |
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/* Do a sanity check on the device handle. */ |
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✓✓ |
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if (device -> ux_device_handle != (ULONG) (ALIGN_TYPE) device) |
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{ |
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/* Error trap. */ |
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_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_ENUMERATOR, UX_DEVICE_HANDLE_UNKNOWN); |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_DEVICE_HANDLE_UNKNOWN, device, 0, 0, UX_TRACE_ERRORS, 0, 0) |
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return(UX_DEVICE_HANDLE_UNKNOWN); |
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} |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_DEVICE_STRING_GET, device, descriptor_buffer, length, (language_id << 16) | string_index, UX_TRACE_HOST_CLASS_EVENTS, 0, 0) |
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/* We need to get the default control endpoint transfer request pointer. */ |
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control_endpoint = &device -> ux_device_control_endpoint; |
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transfer_request = &control_endpoint -> ux_endpoint_transfer_request; |
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#if defined(UX_HOST_STANDALONE) |
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UX_DISABLE |
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if ((device -> ux_device_flags & UX_DEVICE_FLAG_LOCK) || |
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(transfer_request -> ux_transfer_request_flags & UX_TRANSFER_FLAG_LOCK)) |
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{ |
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UX_RESTORE |
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return(UX_BUSY); |
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} |
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device -> ux_device_flags |= UX_DEVICE_FLAG_LOCK; |
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transfer_request -> ux_transfer_request_flags |= |
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(UX_TRANSFER_FLAG_LOCK | UX_TRANSFER_FLAG_AUTO_DEVICE_UNLOCK); |
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UX_RESTORE |
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#else |
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/* Protect the control endpoint semaphore here. It will be unprotected in the |
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transfer request function. */ |
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status = _ux_host_semaphore_get(&device -> ux_device_protection_semaphore, UX_WAIT_FOREVER); |
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/* Check for status. */ |
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✓✓ |
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if (status != UX_SUCCESS) |
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return(UX_SEMAPHORE_ERROR); |
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#endif |
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/* Create a transfer request for the GET_DEVICE_ID request. */ |
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transfer_request -> ux_transfer_request_data_pointer = descriptor_buffer; |
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transfer_request -> ux_transfer_request_requested_length = length; |
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transfer_request -> ux_transfer_request_function = UX_GET_DESCRIPTOR; |
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transfer_request -> ux_transfer_request_type = UX_REQUEST_IN | UX_REQUEST_TYPE_STANDARD | UX_REQUEST_TARGET_DEVICE; |
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transfer_request -> ux_transfer_request_value = (UX_STRING_DESCRIPTOR_ITEM << 8) | string_index; |
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transfer_request -> ux_transfer_request_index = (language_id); |
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/* Send request to HCD layer. */ |
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status = _ux_host_stack_transfer_request(transfer_request); |
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/* Return completion status. */ |
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return(status); |
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} |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _uxe_host_stack_device_string_get PORTABLE C */ |
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/* 6.3.0 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function checks errors in host stack device get function call. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* device Pointer to device instance */ |
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/* descriptor_buffer Pointer to a buffer to fill */ |
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/* LANGID or STRING descriptor */ |
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/* length Length of buffer */ |
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/* language_id 0 to obtain LANGID descriptor */ |
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/* valid language ID to obtain */ |
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/* string descriptor */ |
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/* string_index Index of the string */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* None */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_host_stack_device_string_get String descriptor get */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Application */ |
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/* */ |
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/**************************************************************************/ |
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UINT _uxe_host_stack_device_string_get(UX_DEVICE *device, UCHAR *descriptor_buffer, ULONG length, ULONG language_id, ULONG string_index) |
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{ |
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/* Sanity check. */ |
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if ((device == UX_NULL) || (descriptor_buffer == UX_NULL) || (length == 0)) |
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return(UX_INVALID_PARAMETER); |
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/* Invoke string descriptor get function. */ |
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return(_ux_host_stack_device_string_get(device, descriptor_buffer, length, language_id, string_index)); |
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} |