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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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/** Storage Class */ |
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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_class_storage.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_class_storage_activate 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 activates an instance of the storage class. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* command Pointer to class command */ |
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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_class_storage_configure Configure storage device */ |
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/* _ux_host_class_storage_device_support_check */ |
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/* Check protocol support */ |
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/* _ux_host_class_storage_endpoints_get Get all endpoints */ |
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/* _ux_host_class_storage_device_initialize */ |
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/* Initialize storage device */ |
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/* _ux_host_stack_class_instance_create Create class instance */ |
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/* _ux_host_stack_class_instance_destroy Destroy class instance */ |
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/* _ux_utility_memory_allocate Allocate memory block */ |
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/* _ux_utility_memory_free Free memory block */ |
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/* _ux_host_semaphore_create Create semaphore */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* Storage Class */ |
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/* */ |
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/**************************************************************************/ |
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UINT _ux_host_class_storage_activate(UX_HOST_CLASS_COMMAND *command) |
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{ |
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UX_INTERFACE *interface_ptr; |
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UX_HOST_CLASS_STORAGE *storage; |
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UINT status; |
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/* The storage is always activated by the interface descriptor and not the |
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device descriptor. */ |
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interface_ptr = (UX_INTERFACE *) command -> ux_host_class_command_container; |
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/* Obtain memory for this class instance. The memory used MUST BE allocated from a CACHE SAFE memory |
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since the buffer for the CSW is an array contained within each storage instance. */ |
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storage = _ux_utility_memory_allocate(UX_SAFE_ALIGN, UX_CACHE_SAFE_MEMORY, sizeof(UX_HOST_CLASS_STORAGE)); |
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✓✓ |
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if (storage == UX_NULL) |
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return(UX_MEMORY_INSUFFICIENT); |
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/* Store the class container into this instance */ |
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storage -> ux_host_class_storage_class = command -> ux_host_class_command_class_ptr; |
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/* Store the interface container into the storage class instance. */ |
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storage -> ux_host_class_storage_interface = interface_ptr; |
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/* Store the device container into the storage class instance. */ |
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storage -> ux_host_class_storage_device = interface_ptr -> ux_interface_configuration -> ux_configuration_device; |
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/* Check class,sub class, protocol. */ |
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status = _ux_host_class_storage_device_support_check(storage); |
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✗✓ |
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if (status != UX_SUCCESS) |
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{ |
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_ux_utility_memory_free(storage); |
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return(status); |
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} |
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/* Search all the endpoints for the storage interface (Bulk Out, Bulk in, |
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and optional Interrupt endpoint). */ |
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status = _ux_host_class_storage_endpoints_get(storage); |
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✓✓ |
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if (status != UX_SUCCESS) |
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{ |
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_ux_utility_memory_free(storage); |
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return(status); |
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} |
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/* Create this class instance. */ |
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_ux_host_stack_class_instance_create(command -> ux_host_class_command_class_ptr, (VOID *) storage); |
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/* This instance of the device must also be stored in the interface container. */ |
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interface_ptr -> ux_interface_class_instance = (VOID *) storage; |
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#if defined(UX_HOST_STANDALONE) |
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/* Activate storage class task function. */ |
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storage -> ux_host_class_storage_class -> ux_host_class_task_function = _ux_host_class_storage_tasks_run; |
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/* Mark the storage as live now (media mounts in task). */ |
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storage -> ux_host_class_storage_state = UX_HOST_CLASS_INSTANCE_MOUNTING; |
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/* Keep storage locked before it's initialized. */ |
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storage -> ux_host_class_storage_flags |= UX_HOST_CLASS_STORAGE_FLAG_LOCK; |
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#else |
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/* Configure the USB storage device. */ |
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status = _ux_host_class_storage_configure(storage); |
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/* Create the semaphore to protect multiple threads from accessing the same storage instance. */ |
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✓✓ |
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if (status == UX_SUCCESS) |
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{ |
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status = _ux_host_semaphore_create(&storage -> ux_host_class_storage_semaphore, "ux_host_class_storage_semaphore", 1); |
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✓✓ |
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if (status != UX_SUCCESS) |
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status = UX_SEMAPHORE_ERROR; |
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} |
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/* Error case, free resources. */ |
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✓✓ |
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if (status != UX_SUCCESS) |
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{ |
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/* Last one, semaphore not created or created error, no need to free. */ |
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/* Error, destroy the class and return an error. */ |
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_ux_host_stack_class_instance_destroy(storage -> ux_host_class_storage_class, (VOID *) storage); |
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/* This instance of the device must also be removed in the interface container. */ |
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interface_ptr -> ux_interface_class_instance = (VOID *) UX_NULL; |
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/* Free memory for class instance. */ |
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_ux_utility_memory_free(storage); |
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return(status); |
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} |
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/* Mark the storage as mounting now. */ |
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storage -> ux_host_class_storage_state = UX_HOST_CLASS_INSTANCE_MOUNTING; |
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/* Initialize the USB storage device. We do not check the status at this stage. We let the instance of this |
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class live even if there was a failure. Because the storage class has many media instance, we will let the |
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disconnection signal clean the instance at a later stage. */ |
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_ux_host_class_storage_device_initialize(storage); |
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/* Mark the storage as live now. */ |
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storage -> ux_host_class_storage_state = UX_HOST_CLASS_INSTANCE_LIVE; |
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#endif |
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/* If all is fine and the device is mounted, we may need to inform the application |
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if a function has been programmed in the system structure. */ |
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✓✓ |
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if (_ux_system_host -> ux_system_host_change_function != UX_NULL) |
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{ |
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/* Call system change function. */ |
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_ux_system_host -> ux_system_host_change_function(UX_DEVICE_INSERTION, storage -> ux_host_class_storage_class, (VOID *) storage); |
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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_CLASS_STORAGE_ACTIVATE, storage, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0) |
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/* If trace is enabled, register this object. */ |
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UX_TRACE_OBJECT_REGISTER(UX_TRACE_HOST_OBJECT_TYPE_INTERFACE, storage, 0, 0, 0) |
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/* Return completion status. Force it to success. */ |
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return(UX_SUCCESS); |
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} |
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