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266 lines
8.7 KiB
C
266 lines
8.7 KiB
C
#define TESTAPP_GEN
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/* $Id: xemaclite_example_util.c,v 1.1.2.1 2010/07/12 08:34:25 svemula Exp $ */
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/******************************************************************************
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*
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* (c) Copyright 2009-2010 Xilinx, Inc. All rights reserved.
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*
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* This file contains confidential and proprietary information of Xilinx, Inc.
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* and is protected under U.S. and international copyright and other
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* intellectual property laws.
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*
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* DISCLAIMER
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* This disclaimer is not a license and does not grant any rights to the
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* materials distributed herewith. Except as otherwise provided in a valid
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* license issued to you by Xilinx, and to the maximum extent permitted by
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* applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
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* FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
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* IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
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* MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
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* and (2) Xilinx shall not be liable (whether in contract or tort, including
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* negligence, or under any other theory of liability) for any loss or damage
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* of any kind or nature related to, arising under or in connection with these
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* materials, including for any direct, or any indirect, special, incidental,
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* or consequential loss or damage (including loss of data, profits, goodwill,
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* or any type of loss or damage suffered as a result of any action brought by
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* a third party) even if such damage or loss was reasonably foreseeable or
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* Xilinx had been advised of the possibility of the same.
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*
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* CRITICAL APPLICATIONS
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* Xilinx products are not designed or intended to be fail-safe, or for use in
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* any application requiring fail-safe performance, such as life-support or
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* safety devices or systems, Class III medical devices, nuclear facilities,
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* applications related to the deployment of airbags, or any other applications
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* that could lead to death, personal injury, or severe property or
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* environmental damage (individually and collectively, "Critical
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* Applications"). Customer assumes the sole risk and liability of any use of
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* Xilinx products in Critical Applications, subject only to applicable laws
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* and regulations governing limitations on product liability.
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*
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* THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
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* AT ALL TIMES.
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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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* </pre>
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*
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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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/**
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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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