1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 /**************************************************************************/ 12 /**************************************************************************/ 13 /** */ 14 /** USBX Component */ 15 /** */ 16 /** Device Audio Class */ 17 /** */ 18 /**************************************************************************/ 19 /**************************************************************************/ 20 21 #define UX_SOURCE_CODE 22 23 24 /* Include necessary system files. */ 25 26 #include "ux_api.h" 27 #include "ux_device_class_audio.h" 28 #include "ux_device_stack.h" 29 30 31 /**************************************************************************/ 32 /* */ 33 /* FUNCTION RELEASE */ 34 /* */ 35 /* _ux_device_class_audio_control_request PORTABLE C */ 36 /* 6.1.12 */ 37 /* AUTHOR */ 38 /* */ 39 /* Chaoqiong Xiao, Microsoft Corporation */ 40 /* */ 41 /* DESCRIPTION */ 42 /* */ 43 /* This function manages the based sent by the host on the control */ 44 /* endpoints with a CLASS or VENDOR SPECIFIC type. */ 45 /* */ 46 /* INPUT */ 47 /* */ 48 /* command Pointer to class command */ 49 /* */ 50 /* OUTPUT */ 51 /* */ 52 /* Completion Status */ 53 /* */ 54 /* CALLS */ 55 /* */ 56 /* _ux_device_stack_endpoint_stall Endpoint stall */ 57 /* */ 58 /* CALLED BY */ 59 /* */ 60 /* Device Audio Class */ 61 /* */ 62 /* RELEASE HISTORY */ 63 /* */ 64 /* DATE NAME DESCRIPTION */ 65 /* */ 66 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ 67 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ 68 /* resulting in version 6.1 */ 69 /* 07-29-2022 Chaoqiong Xiao Modified comment(s), */ 70 /* fixed parameter/variable */ 71 /* names conflict C++ keyword, */ 72 /* resulting in version 6.1.12 */ 73 /* */ 74 /**************************************************************************/ _ux_device_class_audio_control_request(UX_SLAVE_CLASS_COMMAND * command)75UINT _ux_device_class_audio_control_request(UX_SLAVE_CLASS_COMMAND *command) 76 { 77 78 UX_SLAVE_TRANSFER *transfer_request; 79 UX_SLAVE_DEVICE *device; 80 UX_SLAVE_CLASS *class_ptr; 81 UX_DEVICE_CLASS_AUDIO *audio; 82 83 84 /* Get the class container. */ 85 class_ptr = command -> ux_slave_class_command_class_ptr; 86 87 /* Get the audio instance from this class container. */ 88 audio = (UX_DEVICE_CLASS_AUDIO *) class_ptr -> ux_slave_class_instance; 89 90 /* Get the pointer to the device. */ 91 device = &_ux_system_slave -> ux_system_slave_device; 92 93 /* Get the pointer to the transfer request associated with the control endpoint. */ 94 transfer_request = &device -> ux_slave_device_control_endpoint.ux_slave_endpoint_transfer_request; 95 96 /* Invoke callback. */ 97 if (audio -> ux_device_class_audio_callbacks.ux_device_class_audio_control_process != UX_NULL) 98 { 99 100 /* Handled by callback. */ 101 return audio -> ux_device_class_audio_callbacks.ux_device_class_audio_control_process(audio, transfer_request); 102 } 103 104 /* Not handled. */ 105 return(UX_ERROR); 106 } 107
