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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 */
/** */
/** Host Stack */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_stack_hcd_register PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function registers a USB controller driver with the USBX stack */
/* and invokes the HCD driver's initialization function. */
/* */
/* Note: The C string of hcd_name must be NULL-terminated and the */
/* length of it (without the NULL-terminator itself) must be no larger */
/* than UX_MAX_HCD_NAME_LENGTH. */
/* */
/* INPUT */
/* */
/* hcd_name Name of HCD to register */
/* hcd_entry_function Entry function of HCD driver */
/* hcd_param1 Parameter 1 of HCD */
/* hcd_param2 Parameter 2 of HCD */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* */
/* CALLS */
/* */
/* _ux_utility_string_length_check Check and return C string */
/* length if no error */
/* _ux_utility_memory_copy Copy name into HCD structure */
/* (hcd_init_function) Init function of HCD driver */
/* */
/* 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), */
/* optimized based on compile */
/* definitions, verified */
/* memset and memcpy cases, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_host_stack_hcd_register(UCHAR *hcd_name,
UINT (*hcd_init_function)(struct UX_HCD_STRUCT *), ULONG hcd_param1, ULONG hcd_param2)
{
UX_HCD *hcd;
UINT status;
#if !defined(UX_NAME_REFERENCED_BY_POINTER)
UINT hcd_name_length = 0;
#endif
#if UX_MAX_HCD > 1
ULONG hcd_index;
#endif
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_HCD_REGISTER, hcd_name, hcd_param1, hcd_param2, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
#if !defined(UX_NAME_REFERENCED_BY_POINTER)
/* Get the length of the class name (exclude null-terminator). */
status = _ux_utility_string_length_check(hcd_name, &hcd_name_length, UX_MAX_HCD_NAME_LENGTH);
if (status)
return(status);
#endif
/* Get HCD. */
hcd = _ux_system_host -> ux_system_host_hcd_array;
#if UX_MAX_HCD > 1
/* We need to parse the controller driver table to find an empty spot. */
for(hcd_index = 0; hcd_index < _ux_system_host -> ux_system_host_max_hcd; hcd_index++)
{
#endif
/* Is this slot available? */
if(hcd -> ux_hcd_status == UX_UNUSED)
{
/* Yes, setup the new HCD entry. */
#if defined(UX_NAME_REFERENCED_BY_POINTER)
hcd -> ux_hcd_name = (const UCHAR *)hcd_name;
#else
/* Initialize the array of the new controller with its name (include null-terminator). */
_ux_utility_memory_copy(hcd -> ux_hcd_name, hcd_name, hcd_name_length + 1); /* Use case of memcpy is verified. */
#endif
/* Store the hardware resources of the controller */
hcd -> ux_hcd_io = hcd_param1;
hcd -> ux_hcd_irq = hcd_param2;
/* This controller is now used */
hcd -> ux_hcd_status = UX_USED;
/* And we have one new controller registered. */
_ux_system_host -> ux_system_host_registered_hcd++;
/* We are now calling the HCD driver initialization. */
status = hcd_init_function(hcd);
/* Return the completion status to the caller. */
return(status);
}
#if UX_MAX_HCD > 1
/* Try the next HCD structure */
hcd++;
}
#endif
/* We have exhausted the array of the HCDs, return an error. */
return(UX_MEMORY_INSUFFICIENT);
}