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common/usbx_stm32_host_controllers/ux_hcd_stm32_request_transfer.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 */
/** */
/** STM32 Controller Driver */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#define UX_HCD_STM32_SOURCE_CODE
#include "ux_api.h"
#include "ux_hcd_stm32.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_hcd_stm32_request_transfer PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the handler for all the transactions on the USB. */
/* The transfer request passed as parameter contains the endpoint and */
/* the device descriptors in addition to the type of transaction de */
/* be executed. This function routes the transfer request to */
/* according to the type of transfer to be executed. */
/* */
/* INPUT */
/* */
/* hcd_stm32 Pointer to STM32 controller */
/* transfer_request Pointer to transfer request */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_hcd_stm32_request_bulk_transfer Request bulk transfer */
/* _ux_hcd_stm32_request_control_transfer Request control */
/* transfer */
/* _ux_hcd_stm32_request_periodic_transfer Request periodic */
/* transfer */
/* */
/* CALLED BY */
/* */
/* STM32 Controller Driver */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _ux_hcd_stm32_request_transfer(UX_HCD_STM32 *hcd_stm32, UX_TRANSFER *transfer_request)
{
UX_ENDPOINT *endpoint;
UINT status;
/* Device Connection Status. */
if (hcd_stm32 -> ux_hcd_stm32_controller_flag & UX_HCD_STM32_CONTROLLER_FLAG_DEVICE_ATTACHED)
{
/* Get the pointer to the Endpoint. */
endpoint = (UX_ENDPOINT *) transfer_request -> ux_transfer_request_endpoint;
/* We reset the actual length field of the transfer request as a safety measure. */
transfer_request -> ux_transfer_request_actual_length = 0;
/* Isolate the endpoint type and route the transfer request. */
switch ((endpoint -> ux_endpoint_descriptor.bmAttributes) & UX_MASK_ENDPOINT_TYPE)
{
case UX_CONTROL_ENDPOINT:
status = _ux_hcd_stm32_request_control_transfer(hcd_stm32, transfer_request);
break;
case UX_BULK_ENDPOINT:
status = _ux_hcd_stm32_request_bulk_transfer(hcd_stm32, transfer_request);
break;
case UX_INTERRUPT_ENDPOINT:
case UX_ISOCHRONOUS_ENDPOINT:
status = _ux_hcd_stm32_request_periodic_transfer(hcd_stm32, transfer_request);
break;
default:
status = UX_ERROR;
}
}
else
{
/* Error, no device attached. */
status = UX_NO_DEVICE_CONNECTED;
}
return(status);
}