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common/usbx_host_classes/src/ux_host_class_storage_configure.c
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/**************************************************************************/
/* */
/* 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_configure PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function calls the USBX stack to do a SET_CONFIGURATION to the */
/* storage device. Once the storage is configured, its interface will */
/* be activated. The bulk endpoints enumerated(1 IN, 1 OUT). */
/* */
/* INPUT */
/* */
/* storage Pointer to storage class */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_configuration_interface_get Get configuration */
/* _ux_host_stack_device_configuration_get Get device config */
/* _ux_host_stack_device_configuration_select Select configuration */
/* */
/* 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), */
/* optimized based on compile */
/* definitions, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_host_class_storage_configure(UX_HOST_CLASS_STORAGE *storage)
{
UINT status;
UX_CONFIGURATION *configuration;
#if UX_MAX_DEVICES > 1
UX_DEVICE *parent_device;
#endif
/* If the device has been configured already, we don't need to do it
again. */
if (storage -> ux_host_class_storage_device -> ux_device_state == UX_DEVICE_CONFIGURED)
return(UX_SUCCESS);
/* A storage device normally has one configuration. So retrieve the 1st configuration
only. */
status = _ux_host_stack_device_configuration_get(storage -> ux_host_class_storage_device, 0, &configuration);
/* Check completion status. */
if (status != UX_SUCCESS)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CONFIGURATION_HANDLE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_CONFIGURATION_HANDLE_UNKNOWN, storage -> ux_host_class_storage_device, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_CONFIGURATION_HANDLE_UNKNOWN);
}
#if UX_MAX_DEVICES > 1
/* Check the storage device power source and check the parent power source for
incompatible connections. */
if (storage -> ux_host_class_storage_device -> ux_device_power_source == UX_DEVICE_BUS_POWERED)
{
/* Pickup pointer to parent device. */
parent_device = storage -> ux_host_class_storage_device -> ux_device_parent;
/* If the device is NULL, the parent is the root hub and we don't have to worry
if the parent is not the root hub, check for its power source. */
if ((parent_device != UX_NULL) && (parent_device -> ux_device_power_source == UX_DEVICE_BUS_POWERED))
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_CONNECTION_INCOMPATIBLE);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_CONNECTION_INCOMPATIBLE, storage, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_CONNECTION_INCOMPATIBLE);
}
}
#endif
/* We have the valid configuration. Ask the USBX stack to set this configuration. */
status = _ux_host_stack_device_configuration_select(configuration);
if (status != UX_SUCCESS)
return(status);
/* If the operation went well, the storage device default alternate setting
for the storage device interface is active and the interrupt endpoint is now enabled.
We have to memorize the first interface since the interrupt endpoint is hooked to it. */
status = _ux_host_stack_configuration_interface_get(configuration, 0, 0, &storage -> ux_host_class_storage_interface);
/* Check completion status. */
if (status != UX_SUCCESS)
{
/* Store the instance in the interface container, this is for the USBX stack
when it needs to invoke the class. */
storage -> ux_host_class_storage_interface -> ux_interface_class_instance = (VOID *) storage;
}
/* Return completion status. */
return(status);
}