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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 */
/** */
/** Utility */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_utility_pci_write PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function writes a 32/16/8 bit value to a specific PCI bus */
/* at a certain offset. */
/* */
/* INPUT */
/* */
/* bus_number PCI bus number */
/* device_number Device number */
/* function_number Function number */
/* offset Offset */
/* value Value to write */
/* write_size Size of write */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* outpl PCI output long function */
/* outpw PCI output word function */
/* outpb PCI output byte function */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/* 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 */
/* */
/**************************************************************************/
VOID _ux_utility_pci_write(ULONG bus_number, ULONG device_number, ULONG function_number,
ULONG offset, ULONG value, UINT write_size)
{
ULONG destination_address;
ULONG cfg_ctrl;
/* Calculate the destination address. */
destination_address = (((bus_number << 16) & 0x00ff0000) | ((device_number << 11) & 0x0000f800) |
((function_number << 8) & 0x00000700));
/* Calculate the configure control value. */
cfg_ctrl = destination_address | offset | 0x80000000;
/* Process relative to write size. */
switch(write_size)
{
case 32:
/* Write the address we need to write to. */
outpl(UX_PCI_CFG_CTRL_ADDRESS, cfg_ctrl);
/* Write the 32 bit content of this address. */
outpl(UX_PCI_CFG_DATA_ADDRESS, value);
break;
case 16:
/* Write the address we need to write to. */
outpl(UX_PCI_CFG_CTRL_ADDRESS, cfg_ctrl);
/* Write the 16 bit content of this address. */
outpw(UX_PCI_CFG_DATA_ADDRESS + (offset & 2), (USHORT) value);
break;
case 8:
/* Write the address we need to write to. */
outpl(UX_PCI_CFG_CTRL_ADDRESS, cfg_ctrl);
/* Write the 8 bit content of this address */
outpb(UX_PCI_CFG_DATA_ADDRESS + (offset & 3), (UCHAR) value);
break;
default:
break;
}
}
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