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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** 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_transport PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the transport layer for all protocols. It perform */
/* the error recovery and retries if needed. */
/* */
/* It's for RTOS mode only. */
/* */
/* INPUT */
/* */
/* storage Pointer to storage class */
/* data_pointer Pointer to data */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* (ux_host_class_storage_transport) Class storage transport */
/* _ux_host_class_storage_device_reset Reset device */
/* _ux_host_class_storage_request_sense Class request sense */
/* _ux_host_stack_endpoint_reset Reset endpoint */
/* */
/* CALLED BY */
/* */
/* Storage Class */
/* */
/**************************************************************************/
UINT _ux_host_class_storage_transport(UX_HOST_CLASS_STORAGE *storage, UCHAR *data_pointer)
{
#if defined(UX_HOST_STANDALONE)
UX_PARAMETER_NOT_USED(storage);
UX_PARAMETER_NOT_USED(data_pointer);
return(UX_FUNCTION_NOT_SUPPORTED);
#else
UINT status;
UINT csw_status;
/* Reset the sense code. */
storage -> ux_host_class_storage_sense_code = UX_SUCCESS;
/* Send the command to the appropriate transport. */
status = storage -> ux_host_class_storage_transport(storage, data_pointer);
#ifdef UX_HOST_CLASS_STORAGE_INCLUDE_LEGACY_PROTOCOL_SUPPORT
/* The treatment of errors is different according to the protocol used. BO and CB belong
to the CSW group. CBI is separate. */
if (storage -> ux_host_class_storage_interface -> ux_interface_descriptor.bInterfaceProtocol != UX_HOST_CLASS_STORAGE_PROTOCOL_CBI)
{
#endif
/* Check the status. */
if (status != UX_SUCCESS)
/* There was a more serious error. Just give up! */
return(status);
/* The command transfer was OK but maybe we have a CSW error. */
csw_status = storage -> ux_host_class_storage_csw[UX_HOST_CLASS_STORAGE_CSW_STATUS];
if (csw_status == 0)
return(UX_SUCCESS);
/* Check for a command failure. If so, we need to sense the error with
a REQUEST SENSE command. */
status = _ux_host_class_storage_request_sense(storage);
/* If we have an transport failure here, we are in trouble! The storage device is in
an unstable state and should be reset completely. */
if (status != UX_SUCCESS)
{
/* Reset device. */
_ux_host_class_storage_device_reset(storage);
return(status);
}
/* The sense code is saved in the device instance. We can return safely. */
return(UX_SUCCESS);
#ifdef UX_HOST_CLASS_STORAGE_INCLUDE_LEGACY_PROTOCOL_SUPPORT
}
else
{
switch (status)
{
case UX_SUCCESS:
return(UX_SUCCESS);
case UX_TRANSFER_STALLED:
/* The endpoint was halted by a stall condition and needs to be reset. */
_ux_host_stack_endpoint_reset(storage -> ux_host_class_storage_bulk_in_endpoint);
/* The endpoint was halted by a stall condition and needs to be reset. */
_ux_host_stack_endpoint_reset(storage -> ux_host_class_storage_bulk_out_endpoint);
/* Check for a command failure. If so, we need to sense the error with
a REQUEST SENSE command. */
status = _ux_host_class_storage_request_sense(storage);
return(status);
default:
/* There was a more serious error. Just give up! */
return(status);
}
}
#endif
#endif
}
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