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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 Stack */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_stack_get_status PORTABLE C */
/* 6.1.6 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function obtains the status of a USB component of the device */
/* such as device or endpoint. */
/* */
/* INPUT */
/* */
/* request_type Request type */
/* request_index Request index */
/* request_length Request length */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_request Transfer request */
/* (ux_slave_dcd_function) DCD dispatch function */
/* */
/* CALLED BY */
/* */
/* Device Stack */
/* */
/* 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), */
/* supported bi-dir-endpoints, */
/* resulting in version 6.1.6 */
/* */
/**************************************************************************/
UINT _ux_device_stack_get_status(ULONG request_type, ULONG request_index, ULONG request_length)
{
UX_SLAVE_DCD *dcd;
UX_SLAVE_TRANSFER *transfer_request;
UX_SLAVE_DEVICE *device;
UX_SLAVE_ENDPOINT *endpoint;
UINT status;
ULONG data_length;
UX_PARAMETER_NOT_USED(request_length);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_STACK_GET_STATUS, request_type, request_index, request_length, 0, UX_TRACE_DEVICE_STACK_EVENTS, 0, 0)
/* Get the pointer to the DCD. */
dcd = &_ux_system_slave -> ux_system_slave_dcd;
/* Get the pointer to the device. */
device = &_ux_system_slave -> ux_system_slave_device;
/* Get the control endpoint for the device. */
endpoint = &device -> ux_slave_device_control_endpoint;
/* Get the pointer to the transfer request associated with the endpoint. */
transfer_request = &endpoint -> ux_slave_endpoint_transfer_request;
/* Reset the status buffer. */
*transfer_request -> ux_slave_transfer_request_data_pointer = 0;
*(transfer_request -> ux_slave_transfer_request_data_pointer + 1) = 0;
/* The default length for GET_STATUS is 2, except for OTG get Status. */
data_length = 2;
/* The status can be for either the device or the endpoint. */
switch (request_type & UX_REQUEST_TARGET)
{
case UX_REQUEST_TARGET_DEVICE:
/* When the device is probed, it is either for the power/remote capabilities or OTG role swap.
We differentiate with the Windex, 0 or OTG status Selector. */
if (request_index == UX_OTG_STATUS_SELECTOR)
{
/* Set the data length to 1. */
data_length = 1;
#ifdef UX_OTG_SUPPORT
/* Store the Role Swap flag. */
*transfer_request -> ux_slave_transfer_request_data_pointer = (UCHAR) _ux_system_otg -> ux_system_otg_slave_role_swap_flag;
#endif
}
else
{
/* Store the current power state in the status buffer. */
if (_ux_system_slave -> ux_system_slave_power_state == UX_DEVICE_SELF_POWERED)
*transfer_request -> ux_slave_transfer_request_data_pointer = 1;
/* Store the remote wakeup capability state in the status buffer. */
if (_ux_system_slave -> ux_system_slave_remote_wakeup_enabled)
*transfer_request -> ux_slave_transfer_request_data_pointer |= 2;
}
break;
case UX_REQUEST_TARGET_ENDPOINT:
#ifndef UX_DEVICE_BIDIRECTIONAL_ENDPOINT_SUPPORT
/* This feature returns the halt state of a specific endpoint. The endpoint index
is used to retrieve the endpoint container. */
status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_ENDPOINT_STATUS, (VOID *)(ALIGN_TYPE)(request_index & (UINT)~UX_ENDPOINT_DIRECTION));
#else
/* This feature returns the halt state of a specific endpoint. The endpoint address
is used to retrieve the endpoint container. */
status = dcd -> ux_slave_dcd_function(dcd, UX_DCD_ENDPOINT_STATUS, (VOID *)(ALIGN_TYPE)(request_index));
#endif
/* Check the status. We may have a unknown endpoint. */
if (status != UX_ERROR)
{
if (status == UX_TRUE)
*transfer_request -> ux_slave_transfer_request_data_pointer = 1;
}
else
{
/* We stall the command. Endpoint is wrong. */
dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint);
/* No more work to do here. The command failed but the upper layer does not depend on it. */
return(UX_SUCCESS);
}
break;
default:
/* We stall the command. */
dcd -> ux_slave_dcd_function(dcd, UX_DCD_STALL_ENDPOINT, endpoint);
/* No more work to do here. The command failed but the upper layer does not depend on it. */
return(UX_SUCCESS);
}
/* Set the phase of the transfer to data out. */
transfer_request -> ux_slave_transfer_request_phase = UX_TRANSFER_PHASE_DATA_OUT;
/* Send the descriptor with the appropriate length to the host. */
status = _ux_device_stack_transfer_request(transfer_request, data_length, data_length);
/* Return the function status. */
return(status);
}