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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
*
* 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 Stack */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_stack_uninitialize PORTABLE C */
/* 6.3.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function uninitializes the generic portion of the device side */
/* of USBX. */
/* */
/* INPUT */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_utility_memory_free Free */
/* _ux_utility_semaphore_delete Delete semaphore */
/* */
/* CALLED BY */
/* */
/* Application */
/* */
/* 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 */
/* 04-02-2021 Chaoqiong Xiao Modified comment(s), */
/* fixed uninitialize in case */
/* there is no EP except EP0, */
/* resulting in version 6.1.6 */
/* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
/* added standalone support, */
/* resulting in version 6.1.10 */
/* 10-31-2023 Chaoqiong Xiao Modified comment(s), */
/* added a new mode to manage */
/* endpoint buffer in classes, */
/* resulting in version 6.3.0 */
/* */
/**************************************************************************/
UINT _ux_device_stack_uninitialize(VOID)
{
UX_SLAVE_DEVICE *device;
UX_SLAVE_ENDPOINT *endpoints_pool;
UX_SLAVE_TRANSFER *transfer_request;
ULONG endpoints_found;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_INITIALIZE, 0, 0, 0, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Free class memory. */
_ux_utility_memory_free(_ux_system_slave -> ux_system_slave_class_array);
/* Allocate some memory for the Control Endpoint. First get the address of the transfer request for the
control endpoint. */
transfer_request = &device -> ux_slave_device_control_endpoint.ux_slave_endpoint_transfer_request;
/* Free memory for the control endpoint buffer. */
_ux_utility_memory_free(transfer_request -> ux_slave_transfer_request_data_pointer);
/* Get the number of endpoints found in the device framework. */
endpoints_found = device -> ux_slave_device_endpoints_pool_number;
/* Get the endpoint pool address in the device container. */
endpoints_pool = device -> ux_slave_device_endpoints_pool;
/* Parse all endpoints and fee memory and semaphore. */
while (endpoints_found-- != 0)
{
#if UX_DEVICE_ENDPOINT_BUFFER_OWNER == 0
/* Free the memory for endpoint data pointer. */
_ux_utility_memory_free(endpoints_pool -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_data_pointer);
#endif
/* Remove the TX semaphore for the endpoint. */
_ux_device_semaphore_delete(&endpoints_pool -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_semaphore);
/* Next endpoint. */
endpoints_pool++;
}
/* Free the endpoint pool address in the device container. */
if (device -> ux_slave_device_endpoints_pool)
_ux_utility_memory_free(device -> ux_slave_device_endpoints_pool);
/* Free memory for interface pool. */
_ux_utility_memory_free(device -> ux_slave_device_interfaces_pool);
/* Return successful completion. */
return(UX_SUCCESS);
}
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