/**************************************************************************/ /* */ /* Copyright (c) Microsoft Corporation. All rights reserved. */ /* */ /* This software is licensed under the Microsoft Software License */ /* Terms for Microsoft Azure RTOS. Full text of the license can be */ /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ /* and in the root directory of this software. */ /* */ /**************************************************************************/ /**************************************************************************/ /**************************************************************************/ /** */ /** USBX Component */ /** */ /** Storage Class */ /** */ /**************************************************************************/ /**************************************************************************/ /* Include necessary system files. */ #define UX_SOURCE_CODE #include "ux_api.h" #include "ux_host_class_storage.h" #include "ux_host_stack.h" /**************************************************************************/ /* */ /* FUNCTION RELEASE */ /* */ /* _ux_host_class_storage_activate PORTABLE C */ /* 6.1.12 */ /* AUTHOR */ /* */ /* Chaoqiong Xiao, Microsoft Corporation */ /* */ /* DESCRIPTION */ /* */ /* This function activates an instance of the storage class. */ /* */ /* INPUT */ /* */ /* command Pointer to class command */ /* */ /* OUTPUT */ /* */ /* Completion Status */ /* */ /* CALLS */ /* */ /* _ux_host_class_storage_configure Configure storage device */ /* _ux_host_class_storage_device_initialize */ /* Initialize storage device */ /* _ux_host_stack_class_instance_create Create class instance */ /* _ux_host_stack_class_instance_destroy Destroy class instance */ /* _ux_utility_memory_allocate Allocate memory block */ /* _ux_utility_memory_free Free memory block */ /* _ux_host_semaphore_create Create semaphore */ /* */ /* CALLED BY */ /* */ /* Storage Class */ /* */ /* RELEASE HISTORY */ /* */ /* DATE NAME DESCRIPTION */ /* */ /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ /* resulting in version 6.1 */ /* 01-31-2022 Chaoqiong Xiao Modified comment(s), */ /* added standalone support. */ /* resulting in version 6.1.10 */ /* 07-29-2022 Chaoqiong Xiao Modified comment(s), */ /* fixed parameter/variable */ /* names conflict C++ keyword, */ /* resulting in version 6.1.12 */ /* */ /**************************************************************************/ UINT _ux_host_class_storage_activate(UX_HOST_CLASS_COMMAND *command) { UX_INTERFACE *interface_ptr; UX_HOST_CLASS_STORAGE *storage; UINT status; /* The storage is always activated by the interface descriptor and not the device descriptor. */ interface_ptr = (UX_INTERFACE *) command -> ux_host_class_command_container; /* Obtain memory for this class instance. The memory used MUST BE allocated from a CACHE SAFE memory since the buffer for the CSW is an array contained within each storage instance. */ storage = _ux_utility_memory_allocate(UX_SAFE_ALIGN, UX_CACHE_SAFE_MEMORY, sizeof(UX_HOST_CLASS_STORAGE)); if (storage == UX_NULL) return(UX_MEMORY_INSUFFICIENT); /* Store the class container into this instance */ storage -> ux_host_class_storage_class = command -> ux_host_class_command_class_ptr; /* Store the interface container into the storage class instance. */ storage -> ux_host_class_storage_interface = interface_ptr; /* Store the device container into the storage class instance. */ storage -> ux_host_class_storage_device = interface_ptr -> ux_interface_configuration -> ux_configuration_device; /* Create this class instance. */ _ux_host_stack_class_instance_create(command -> ux_host_class_command_class_ptr, (VOID *) storage); /* This instance of the device must also be stored in the interface container. */ interface_ptr -> ux_interface_class_instance = (VOID *) storage; #if defined(UX_HOST_STANDALONE) /* Check class,sub class, protocol. */ status = _ux_host_class_storage_device_support_check(storage); if (status != UX_SUCCESS) { _ux_utility_memory_free(storage); return(status); } /* Search all the endpoints for the storage interface (Bulk Out, Bulk in, and optional Interrupt endpoint). */ status = _ux_host_class_storage_endpoints_get(storage); if (status != UX_SUCCESS) { _ux_utility_memory_free(storage); return(status); } /* Activate storage class task function. */ storage -> ux_host_class_storage_class -> ux_host_class_task_function = _ux_host_class_storage_tasks_run; /* Mark the storage as live now (media mounts in task). */ storage -> ux_host_class_storage_state = UX_HOST_CLASS_INSTANCE_MOUNTING; /* Keep storage locked before it's initialized. */ storage -> ux_host_class_storage_flags |= UX_HOST_CLASS_STORAGE_FLAG_LOCK; #else /* Configure the USB storage device. */ status = _ux_host_class_storage_configure(storage); /* Create the semaphore to protect multiple threads from accessing the same storage instance. */ if (status == UX_SUCCESS) { status = _ux_host_semaphore_create(&storage -> ux_host_class_storage_semaphore, "ux_host_class_storage_semaphore", 1); if (status != UX_SUCCESS) status = UX_SEMAPHORE_ERROR; } /* Error case, free resources. */ if (status != UX_SUCCESS) { /* Last one, semaphore not created or created error, no need to free. */ /* Error, destroy the class and return an error. */ _ux_host_stack_class_instance_destroy(storage -> ux_host_class_storage_class, (VOID *) storage); /* This instance of the device must also be removed in the interface container. */ interface_ptr -> ux_interface_class_instance = (VOID *) UX_NULL; /* Free memory for class instance. */ _ux_utility_memory_free(storage); return(status); } /* Mark the storage as mounting now. */ storage -> ux_host_class_storage_state = UX_HOST_CLASS_INSTANCE_MOUNTING; /* Initialize the USB storage device. We do not check the status at this stage. We let the instance of this class live even if there was a failure. Because the storage class has many media instance, we will let the disconnection signal clean the instance at a later stage. */ _ux_host_class_storage_device_initialize(storage); /* Mark the storage as live now. */ storage -> ux_host_class_storage_state = UX_HOST_CLASS_INSTANCE_LIVE; #endif /* If all is fine and the device is mounted, we may need to inform the application if a function has been programmed in the system structure. */ if (_ux_system_host -> ux_system_host_change_function != UX_NULL) { /* Call system change function. */ _ux_system_host -> ux_system_host_change_function(UX_DEVICE_INSERTION, storage -> ux_host_class_storage_class, (VOID *) storage); } /* If trace is enabled, insert this event into the trace buffer. */ UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_CLASS_STORAGE_ACTIVATE, storage, 0, 0, 0, UX_TRACE_HOST_CLASS_EVENTS, 0, 0) /* If trace is enabled, register this object. */ UX_TRACE_OBJECT_REGISTER(UX_TRACE_HOST_OBJECT_TYPE_INTERFACE, storage, 0, 0, 0) /* Return completion status. Force it to success. */ return(UX_SUCCESS); }