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common/usbx_device_classes/src/ux_device_class_storage_control_request.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 */
/** */
/** 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_control_request PORTABLE C */
/* 6.1.10 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function manages the based sent by the host on the control */
/* endpoints with a CLASS or VENDOR SPECIFIC type. */
/* */
/* INPUT */
/* */
/* storage Pointer to storage class */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Transfer request */
/* _ux_device_stack_transfer_abort Abort Transfer */
/* */
/* CALLED BY */
/* */
/* Device 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 command logic, */
/* resulting in version 6.1 */
/* 12-31-2020 Chaoqiong Xiao Modified comment(s), */
/* fixed USB CV test issues, */
/* resulting in version 6.1.3 */
/* 01-31-2022 Chaoqiong Xiao Modified comment(s), */
/* added standalone support, */
/* resulting in version 6.1.10 */
/* */
/**************************************************************************/
UINT _ux_device_class_storage_control_request(UX_SLAVE_CLASS_COMMAND *command)
{
UX_SLAVE_TRANSFER *transfer_request;
UX_SLAVE_DEVICE *device;
UX_SLAVE_CLASS *class;
ULONG request;
ULONG request_value;
ULONG request_length;
UX_SLAVE_CLASS_STORAGE *storage;
#if !defined(UX_DEVICE_STANDALONE)
UX_SLAVE_INTERFACE *interface;
#endif
UX_SLAVE_ENDPOINT *endpoint_in;
UX_SLAVE_ENDPOINT *endpoint_out;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Get the pointer to the transfer request associated with the control endpoint. */
transfer_request = &device -> ux_slave_device_control_endpoint.ux_slave_endpoint_transfer_request;
/* Extract the request type from the SETUP packet.. */
request = *(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_REQUEST);
request_value = _ux_utility_short_get(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_VALUE);
request_length = _ux_utility_short_get(transfer_request -> ux_slave_transfer_request_setup + UX_SETUP_LENGTH);
/* Check if wValue is valid. */
if (request_value != 0)
return(UX_ERROR);
/* Get the class container. */
class = command -> ux_slave_class_command_class_ptr;
/* Get the storage instance from this class container. */
storage = (UX_SLAVE_CLASS_STORAGE *) class -> ux_slave_class_instance;
/* Here we proceed only the standard request we know of at the device level. */
switch (request)
{
case UX_SLAVE_CLASS_STORAGE_RESET:
/* Check if wLength is valid. */
if (request_length != 0)
return(UX_ERROR);
#if defined(UX_DEVICE_STANDALONE)
endpoint_in = storage -> ux_device_class_storage_ep_in;
endpoint_out = storage -> ux_device_class_storage_ep_out;
#else
/* We need the interface to the class. */
interface = storage -> ux_slave_class_storage_interface;
/* Locate the endpoints. */
endpoint_in = interface -> ux_slave_interface_first_endpoint;
/* Check the endpoint direction, if IN we have the correct endpoint. */
if ((endpoint_in -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) != UX_ENDPOINT_IN)
{
/* Wrong direction, we found the OUT endpoint first. */
endpoint_out = endpoint_in;
/* So the next endpoint has to be the IN endpoint. */
endpoint_in = endpoint_out -> ux_slave_endpoint_next_endpoint;
}
else
{
/* We found the endpoint IN first, so next endpoint is OUT. */
endpoint_out = endpoint_in -> ux_slave_endpoint_next_endpoint;
}
#endif
/* First cancel any transfer on the endpoint OUT, from the host. */
transfer_request = &endpoint_out -> ux_slave_endpoint_transfer_request;
_ux_device_stack_transfer_abort(transfer_request, UX_TRANSFER_APPLICATION_RESET);
/* Then cancel any transfer on the endpoint IN, from the host. */
transfer_request = &endpoint_in -> ux_slave_endpoint_transfer_request;
_ux_device_stack_transfer_abort(transfer_request, UX_TRANSFER_APPLICATION_RESET);
/* Reset phase error. */
storage -> ux_slave_class_storage_csw_status = UX_SLAVE_CLASS_STORAGE_CSW_PASSED;
break;
case UX_SLAVE_CLASS_STORAGE_GET_MAX_LUN:
/* Check if wLength is valid. */
if (request_length < 1)
return(UX_ERROR);
/* Set the value of the number of LUN in the buffer. The max number of LUN is the
number of declared LUN - 1. */
*transfer_request -> ux_slave_transfer_request_data_pointer = (UCHAR)(storage -> ux_slave_class_storage_number_lun -1);
/* Set the phase of the transfer to data out. */
transfer_request -> ux_slave_transfer_request_phase = UX_TRANSFER_PHASE_DATA_OUT;
/* We can return the LUN number. */
_ux_device_stack_transfer_request(transfer_request, 1, 1);
break;
default:
/* Unknown function. It's not handled. */
return(UX_ERROR);
}
/* It's handled. */
return(UX_SUCCESS);
}