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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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/* Defined if FileX is not integrated in USBX |
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and it's used as external module for file system. */ |
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/* #define UX_HOST_CLASS_STORAGE_EXT_FILEX */ |
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#if defined(UX_HOST_CLASS_STORAGE_NO_FILEX) |
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#ifdef FX_API_H /* For test, confirm FX is not included before. */ |
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#error fx_api.h should not be included in this mode |
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#endif |
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/* FX not integrated in UX, but used as external module. */ |
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#if defined(UX_HOST_CLASS_STORAGE_EXT_FILEX) |
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/* FX related things needs define here. */ |
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#include "fx_api.h" |
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#define UX_MEDIA FX_MEDIA |
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VOID _ux_host_class_storage_driver_entry(UX_MEDIA *media); |
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/* FX driver is available to support FX as external module. */ |
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#ifndef UX_HOST_CLASS_STORAGE_DRIVER_ENTRY_ENABLE |
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#define UX_HOST_CLASS_STORAGE_DRIVER_ENTRY_ENABLE |
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#endif |
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#endif |
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#else |
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/* FX driver is used for RTOS mode by default. */ |
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#ifndef UX_HOST_CLASS_STORAGE_DRIVER_ENTRY_ENABLE |
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#define UX_HOST_CLASS_STORAGE_DRIVER_ENTRY_ENABLE |
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#endif |
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#endif |
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#if defined(UX_HOST_CLASS_STORAGE_DRIVER_ENTRY_ENABLE) |
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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_driver_entry PORTABLE C */ |
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/* 6.1.12 */ |
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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 is the entry point for the FileX file system. All */ |
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/* FileX driver I/O calls are are multiplexed here and rerouted to */ |
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/* the proper USB storage class functions. */ |
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/* */ |
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/* When the entry is for storage with FX support (not in standalone */ |
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/* mode, and with FileX), the FX media is openned in storage mount */ |
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/* flow, and can be directly used in application after mounted. */ |
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/* */ |
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/* When the entry is for no FX mode (FX in external module, and USBX */ |
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/* is compiled without FileX integration), it is an example with */ |
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/* disk partition support. In this case the FX media does not operate */ |
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/* inside the storage flow. Actions are taken when application mounts */ |
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/* media to FX_MEDIA and then have access to media APIs. */ |
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/* */ |
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/* In no FX mode demo, it assumes media is managed with partition */ |
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/* start from sector address of FX_MEDIA::fx_media_reserved_for_user. */ |
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/* */ |
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/* The following links are not initialized in no FX mode, they must be */ |
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/* initialized before using the entry in no FX mode: */ |
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/* - FX_MEDIA::fx_media_reserved_for_user */ |
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/* Partition start sector inside */ |
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/* the whole storage media, must */ |
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/* set before media open */ |
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/* - FX_MEDIA::fx_media_driver_info Pointer to storage media, */ |
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/* assigned while calling media */ |
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/* open (fx_media_open) */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* media FileX media pointer */ |
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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_class_storage_sense_code_translate */ |
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/* Translate error status codes */ |
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/* _ux_host_class_storage_media_read Read sector(s) */ |
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/* _ux_host_class_storage_media_write Write sector(s) */ |
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/* _ux_host_semaphore_get Get protection semaphore */ |
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/* _ux_host_semaphore_put Release protection semaphore */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* FileX */ |
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/* */ |
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/**************************************************************************/ |
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VOID _ux_host_class_storage_driver_entry(FX_MEDIA *media) |
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{ |
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UINT status; |
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UX_HOST_CLASS_STORAGE *storage; |
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UX_HOST_CLASS_STORAGE_MEDIA *storage_media; |
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ULONG partition_start; |
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/* Get the pointers to the instances and partition start. */ |
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#if !defined(UX_HOST_CLASS_STORAGE_NO_FILEX) |
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storage = (UX_HOST_CLASS_STORAGE *) media -> fx_media_driver_info; |
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storage_media = (UX_HOST_CLASS_STORAGE_MEDIA *) media -> fx_media_reserved_for_user; |
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partition_start = storage_media -> ux_host_class_storage_media_partition_start; |
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#else |
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storage_media = (UX_HOST_CLASS_STORAGE_MEDIA *) media -> fx_media_driver_info; |
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storage = storage_media -> ux_host_class_storage_media_storage; |
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partition_start = (ULONG) media -> fx_media_reserved_for_user; |
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#endif |
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/* Ensure the instance is valid. */ |
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✓✓ |
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if ((storage -> ux_host_class_storage_state != UX_HOST_CLASS_INSTANCE_LIVE) && |
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✓✓ |
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(storage -> ux_host_class_storage_state != UX_HOST_CLASS_INSTANCE_MOUNTING)) |
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{ |
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/* Class instance is invalid. Return an error! */ |
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media -> fx_media_driver_status = FX_PTR_ERROR; |
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return; |
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} |
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#if defined(UX_HOST_CLASS_STORAGE_NO_FILEX) |
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/* Ensure the media is valid. */ |
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if ((storage_media -> ux_host_class_storage_media_storage != storage) || |
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(storage_media -> ux_host_class_storage_media_status != UX_USED)) |
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{ |
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/* Media instance is invalid. */ |
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media -> fx_media_driver_status = FX_PTR_ERROR; |
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return; |
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} |
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#endif |
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/* Protect Thread reentry to this instance. */ |
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status = _ux_host_class_storage_lock(storage, UX_WAIT_FOREVER); |
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✓✓ |
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if (status != UX_SUCCESS) |
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{ |
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/* Unable to lock, return an error. */ |
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media -> fx_media_driver_status = FX_INVALID_STATE; |
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return; |
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} |
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/* Restore the LUN number from the media instance. */ |
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storage -> ux_host_class_storage_lun = storage_media -> ux_host_class_storage_media_lun; |
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/* And the sector size. */ |
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storage -> ux_host_class_storage_sector_size = |
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storage_media -> ux_host_class_storage_media_sector_size; |
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#if defined(UX_HOST_CLASS_STORAGE_NO_FILEX) |
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/* Restore current used last sector number. */ |
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storage -> ux_host_class_storage_last_sector_number = |
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storage_media -> ux_host_class_storage_media_number_sectors - 1; |
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#endif |
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/* Look at the request specified by the FileX caller. */ |
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✓✓✓✓
✓✓✓✓
✓ |
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switch (media -> fx_media_driver_request) |
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{ |
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case FX_DRIVER_READ: |
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/* Read one or more sectors. */ |
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status = _ux_host_class_storage_media_read(storage, |
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media -> fx_media_driver_logical_sector + partition_start, |
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media -> fx_media_driver_sectors, |
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media -> fx_media_driver_buffer); |
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/* Check completion status. */ |
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✓✓ |
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if (status == UX_SUCCESS) |
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media -> fx_media_driver_status = FX_SUCCESS; |
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else |
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{ |
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#if defined(UX_HOST_STANDALONE) |
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/* Poll status. */ |
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_ux_host_class_storage_media_check(storage); |
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#endif |
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media -> fx_media_driver_status = |
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_ux_host_class_storage_sense_code_translate(storage, status); |
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} |
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break; |
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case FX_DRIVER_WRITE: |
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/* Write one or more sectors. */ |
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status = _ux_host_class_storage_media_write(storage, |
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media -> fx_media_driver_logical_sector + partition_start, |
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media -> fx_media_driver_sectors, |
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media -> fx_media_driver_buffer); |
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/* Check completion status. */ |
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✓✓ |
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if (status == UX_SUCCESS) |
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media -> fx_media_driver_status = FX_SUCCESS; |
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else |
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{ |
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#if defined(UX_HOST_STANDALONE) |
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/* Poll status. */ |
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_ux_host_class_storage_media_check(storage); |
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#endif |
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media -> fx_media_driver_status = |
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_ux_host_class_storage_sense_code_translate(storage,status); |
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} |
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break; |
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case FX_DRIVER_FLUSH: |
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/* Nothing to do. Just return a good status! */ |
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media -> fx_media_driver_status = FX_SUCCESS; |
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break; |
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case FX_DRIVER_ABORT: |
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/* Nothing to do. Just return a good status! */ |
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media -> fx_media_driver_status = FX_SUCCESS; |
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break; |
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case FX_DRIVER_INIT: |
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#if defined(UX_HOST_STANDALONE) |
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/* Poll status. */ |
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_ux_host_class_storage_media_check(storage); |
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#endif |
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/* Check for media protection. We must do this operation here because FileX clears all the |
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media fields before init. */ |
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✓✓ |
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if (storage -> ux_host_class_storage_write_protected_media == UX_TRUE) |
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/* The media is Write Protected. We tell FileX. */ |
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media -> fx_media_driver_write_protect = UX_TRUE; |
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/* This function always succeeds. */ |
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media -> fx_media_driver_status = FX_SUCCESS; |
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break; |
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case FX_DRIVER_UNINIT: |
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/* Nothing to do. Just return a good status! */ |
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media -> fx_media_driver_status = FX_SUCCESS; |
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break; |
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case FX_DRIVER_BOOT_READ: |
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/* Read the media boot sector. */ |
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status = _ux_host_class_storage_media_read(storage, |
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partition_start, 1, media -> fx_media_driver_buffer); |
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/* Check completion status. */ |
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✓✓ |
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if (status == UX_SUCCESS) |
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media -> fx_media_driver_status = FX_SUCCESS; |
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else |
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{ |
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#if defined(UX_HOST_STANDALONE) |
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/* Poll status. */ |
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_ux_host_class_storage_media_check(storage); |
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#endif |
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media -> fx_media_driver_status = |
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_ux_host_class_storage_sense_code_translate(storage,status); |
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} |
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break; |
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case FX_DRIVER_BOOT_WRITE: |
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/* Write the boot sector. */ |
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status = _ux_host_class_storage_media_write(storage, |
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partition_start, 1, media -> fx_media_driver_buffer); |
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/* Check completion status. */ |
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✓✓ |
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if (status == UX_SUCCESS) |
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media -> fx_media_driver_status = FX_SUCCESS; |
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else |
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{ |
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#if defined(UX_HOST_STANDALONE) |
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/* Poll status. */ |
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_ux_host_class_storage_media_check(storage); |
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#endif |
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media -> fx_media_driver_status = |
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_ux_host_class_storage_sense_code_translate(storage,status); |
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} |
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break; |
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default: |
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/* Invalid request from FileX */ |
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media -> fx_media_driver_status = FX_IO_ERROR; |
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break; |
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} |
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/* Unprotect thread reentry to this instance. */ |
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_ux_host_class_storage_unlock(storage); |
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} |
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#endif |