277 lines
8.6 KiB
C
277 lines
8.6 KiB
C
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/******************************************************************************
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*
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* Copyright (C) 2009 - 2014 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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*
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******************************************************************************/
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/*****************************************************************************/
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/**
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*
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* @file xemaclite_example_util.c
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*
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* This file implements the utility functions for the EmacLite example code.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- ---- -------- -------------------------------------------------------
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* 2.00a ktn 04/13/09 First release
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* 2.00a ktn 06/13/09 Changed the EmacLitePhyDetect function so that
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* the function is not in an infinite loop in case of a
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* faulty Phy device.
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* 3.03a bss 09/01/12 Moved the declarations of RecvFrameLength,
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* TransmitComplete, EmacLiteInstance
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* TxFrame[XEL_MAX_FRAME_SIZE], RxFrame[XEL_MAX_FRAME_SIZE]
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* from the xemaclite_example.h
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* to this file for fixing C++ compilation errors
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*</pre>
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include "xemaclite_example.h"
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#include "stdio.h"
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/************************** Variable Definitions ****************************/
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/*
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* Set up valid local MAC addresses. This loop back test uses the LocalAddress
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* both as a source and destination MAC address.
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*/
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XEmacLite EmacLiteInstance; /* Instance of the EmacLite */
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/*
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* Buffers used for Transmission and Reception of Packets. These are declared
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* as global so that they are not a part of the stack.
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*/
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u8 TxFrame[XEL_MAX_FRAME_SIZE];
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u8 RxFrame[XEL_MAX_FRAME_SIZE];
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volatile u32 RecvFrameLength; /* Indicates the length of the Received packet
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*/
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volatile int TransmitComplete; /* Flag to indicate that the Transmission
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* is complete
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*/
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/******************************************************************************/
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/**
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*
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* This function detects the PHY address by looking for successful MII status
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* register contents (PHY register 1). It looks for a PHY that supports
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* auto-negotiation and 10Mbps full-duplex and half-duplex. So, this code
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* won't work for PHYs that don't support those features, but it's a bit more
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* general purpose than matching a specific PHY manufacturer ID.
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*
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* Note also that on some (older) Xilinx ML4xx boards, PHY address 0 does not
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* properly respond to this query. But, since the default is 0 and assuming
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* no other address responds, then it seems to work OK.
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*
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* @param InstancePtr is the pointer to the instance of EmacLite driver.
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*
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* @return The address of the PHY device detected (returns 0 if not
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* detected).
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*
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* @note
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* The bit mask (0x1808) of the MII status register
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* (PHY Register 1) used in this function are:
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* 0x1000: 10Mbps full duplex support.
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* 0x0800: 10Mbps half duplex support.
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* 0x0008: Auto-negotiation support.
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*
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******************************************************************************/
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u32 EmacLitePhyDetect(XEmacLite *InstancePtr)
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{
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u16 PhyData;
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int PhyAddr;
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/*
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* Verify all 32 MDIO ports.
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*/
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for (PhyAddr = 31; PhyAddr >= 0; PhyAddr--) {
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XEmacLite_PhyRead(InstancePtr, PhyAddr, PHY_REG1_OFFSET,
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&PhyData);
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if (PhyData != 0xFFFF) {
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if ((PhyData & PHY_REG1_DETECT_MASK) ==
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PHY_REG1_DETECT_MASK) {
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return PhyAddr; /* Found a valid PHY device */
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}
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}
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}
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/*
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* Unable to detect PHY device returning the default address of 0.
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*/
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return 0;
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}
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/******************************************************************************/
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/**
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*
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* This function enables the MAC loopback on the PHY.
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*
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* @param InstancePtr is the pointer to the instance of EmacLite driver.
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* @param PhyAddress is the address of the Phy device.
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*
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* @return
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* - XST_SUCCESS if the loop back is enabled.
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* - XST_FAILURE if the loop back was not enabled.
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*
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* @note None.
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*
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******************************************************************************/
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int EmacLiteEnablePhyLoopBack(XEmacLite *InstancePtr, u32 PhyAddress)
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{
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int Status;
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u16 PhyData = 0;
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/*
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* Set the speed and put the PHY in reset.
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*/
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PhyData |= PHY_REG0_SPD_100_MASK;
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Status = XEmacLite_PhyWrite(InstancePtr, PhyAddress, PHY_REG0_OFFSET,
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PhyData | PHY_REG0_RESET_MASK);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Give sufficient delay for Phy Reset.
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*/
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EmacLitePhyDelay(EMACLITE_PHY_DELAY_SEC);
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/*
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* Set the PHY in loop back.
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*/
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XEmacLite_PhyWrite(InstancePtr, PhyAddress, PHY_REG0_OFFSET,
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PhyData | PHY_REG0_LOOPBACK_MASK);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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/*
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* Give sufficient delay for Phy Loopback Enable.
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*/
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EmacLitePhyDelay(1);
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return XST_SUCCESS;
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}
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/******************************************************************************/
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/**
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*
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* This function disables the MAC loopback on the PHY.
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*
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* @param InstancePtr is the pointer to the instance of EmacLite driver.
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* @param PhyAddress is the address of the Phy device.
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*
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* @return
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* - XST_SUCCESS if the loop back was disabled.
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* - XST_FAILURE if the loop back was not disabled.
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*
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* @note None.
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*
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******************************************************************************/
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int EmacLiteDisablePhyLoopBack(XEmacLite *InstancePtr, u32 PhyAddress)
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{
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int Status;
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u16 PhyData;
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/*
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* Disable loop back through PHY register using MDIO support.
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*/
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Status = XEmacLite_PhyRead(InstancePtr, PhyAddress, PHY_REG0_OFFSET,
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&PhyData);
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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Status = XEmacLite_PhyWrite(InstancePtr,PhyAddress, PHY_REG0_OFFSET,
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PhyData & ~(PHY_REG0_LOOPBACK_MASK));
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if (Status != XST_SUCCESS) {
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return XST_FAILURE;
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}
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return XST_SUCCESS;
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}
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/******************************************************************************/
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/**
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*
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* For PPC we use a usleep call, for Microblaze we use an assembly loop that
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* is roughly the same regardless of optimization level, although caches and
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* memory access time can make the delay vary. Just keep in mind that after
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* resetting or updating the PHY modes, the PHY typically needs time to recover.
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*
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* @return None
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*
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* @note None
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*
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******************************************************************************/
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void EmacLitePhyDelay(unsigned int Seconds)
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{
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#ifdef __MICROBLAZE__
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static int WarningFlag = 0;
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/* If MB caches are disabled or do not exist, this delay loop could
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* take minutes instead of seconds (e.g., 30x longer). Print a warning
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* message for the user (once). If only MB had a built-in timer!
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*/
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if (((mfmsr() & 0x20) == 0) && (!WarningFlag)) {
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#ifdef STDOUT_BASEADDRESS
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xil_printf("Warning: This example will take ");
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xil_printf("minutes to complete without I-cache enabled \r\n");
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#endif
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WarningFlag = 1;
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}
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#define ITERS_PER_SEC (XPAR_CPU_CORE_CLOCK_FREQ_HZ / 6)
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asm volatile ("\n"
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"1: \n\t"
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"addik r7, r0, %0 \n\t"
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"2: \n\t"
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"addik r7, r7, -1 \n\t"
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"bneid r7, 2b \n\t"
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"or r0, r0, r0 \n\t"
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"bneid %1, 1b \n\t"
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"addik %1, %1, -1 \n\t"
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:: "i"(ITERS_PER_SEC), "d" (Seconds));
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#else
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usleep(Seconds * 1000000);
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#endif
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}
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