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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 */
/** */
/** Device Storage Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_storage.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_storage_start_stop PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function starts or stops the media. The device load or eject */
/* the medium. */
/* */
/* INPUT */
/* */
/* storage Pointer to storage class */
/* lun Logical unit number */
/* endpoint_in Pointer to IN endpoint */
/* endpoint_out Pointer to OUT endpoint */
/* cbwcb Pointer to CBWCB */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Device Storage Class */
/* */
/**************************************************************************/
UINT _ux_device_class_storage_start_stop(UX_SLAVE_CLASS_STORAGE *storage, ULONG lun,
UX_SLAVE_ENDPOINT *endpoint_in,
UX_SLAVE_ENDPOINT *endpoint_out, UCHAR * cbwcb)
{
ULONG power_condition;
ULONG start;
ULONG load_eject;
UX_PARAMETER_NOT_USED(endpoint_in);
UX_PARAMETER_NOT_USED(endpoint_out);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_STORAGE_START_STOP, storage, lun, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0)
/* Parse START/STOP (SBC-2 0x1B): byte 4 has LOEJ (bit1) and START (bit0). */
power_condition = (ULONG)((cbwcb[4] & 0xF0) >> 0x04);
start = (ULONG)(cbwcb[4] & 0x01);
load_eject = (ULONG)((cbwcb[4] & 0x02) >> 0x01);
if ((load_eject == 1) &&
(storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_prevent_medium_removal == 1) &&
(storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_removable_flag == UX_SLAVE_CLASS_STORAGE_MEDIA_IS_NOT_REMOVABLE))
{
/* Update the REQUEST SENSE codes. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_request_sense_status =
UX_DEVICE_CLASS_STORAGE_SENSE_STATUS(UX_SLAVE_CLASS_STORAGE_SENSE_KEY_ILLEGAL_REQUEST,
UX_SLAVE_CLASS_STORAGE_ASC_KEY_INVALID_COMMAND, 0x00);
/* Set the CSW with failure. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_FAILED;
/* Return error. */
return(UX_ERROR);
}
/* power_condition = 0, load_eject = 0 : no action regarding loading or ejecting the medium.
power_condition = 0, load_eject = 1, start = 0 : unload the medium.
power_condition = 0, load_eject = 1, start = 1 : load the medium.
*/
if (power_condition == UX_SLAVE_CLASS_STORAGE_POWER_CONDITION_START_VALID)
{
if (load_eject != 0)
{
if (start == 0)
{
/* Eject media: mark as empty. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_medium_loaded_status = 0;
}
else
{
/* Load media: mark as present/complete. */
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_medium_loaded_status = 1;
}
}
}
/* Call the media start/stop function if available. */
if (storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_start_stop != UX_NULL)
storage -> ux_slave_class_storage_lun[lun].ux_slave_class_storage_media_start_stop(
storage, lun, power_condition, start, load_eject);
/* We set the CSW with success. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PASSED;
/* Return successful completion. */
return(UX_SUCCESS);
}
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