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UniNEnetMII.cpp
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UniNEnetMII.cpp
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/*
* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1998-1999 by Apple Computer, Inc., All rights reserved.
*
* MII/PHY (National Semiconductor DP83840/DP83840A) support methods.
* It is general enough to work with most MII/PHYs.
*
* HISTORY
*
*/
#include "UniNEnet.h"
#include "UniNEnetMII.h"
/* Read from MII/PHY registers. */
bool UniNEnet::miiReadWord( UInt16 *dataPtr, UInt16 reg )
{
UInt32 i;
UInt32 miiReg;
if ( phyId == 0xFF )
{
ALRT( 0, phyId << 16 | reg, 'IdR-', "UniNEnet::miiReadWord - phyId not established yet." );
return false;
}
WRITE_REGISTER( MIFBitBangFrame_Output,
kMIFBitBangFrame_Output_ST_default
| kMIFBitBangFrame_Output_OP_read
| phyId << kMIFBitBangFrame_Output_PHYAD_shift
| reg << kMIFBitBangFrame_Output_REGAD_shift
| kMIFBitBangFrame_Output_TA_MSB );
for ( i = 0; i < 20; i++ )
{
miiReg = READ_REGISTER( MIFBitBangFrame_Output );
if ( miiReg & kMIFBitBangFrame_Output_TA_LSB )
{
ELG( miiReg, phyId << 16 | reg, 'miiR', "UniNEnet::miiReadWord" );
*dataPtr = (UInt16) miiReg;
return true;
}
IODelay( 10 );
}
ELG( miiReg, phyId << 16 | reg, 'miR-', "UniNEnet::miiReadWord - failed" );
return false;
}/* end miiReadWord */
/* Write to MII/PHY registers. */
bool UniNEnet::miiWriteWord( UInt16 data, UInt16 reg )
{
UInt32 i;
UInt32 miiReg;
if ( phyId == 0xFF )
{
ALRT( data, phyId << 16 | reg, 'IdW-', "UniNEnet::miiWriteWord - phyId not established yet." );
return false;
}
WRITE_REGISTER( MIFBitBangFrame_Output,
kMIFBitBangFrame_Output_ST_default
| kMIFBitBangFrame_Output_OP_write
| phyId << kMIFBitBangFrame_Output_PHYAD_shift
| reg << kMIFBitBangFrame_Output_REGAD_shift
| kMIFBitBangFrame_Output_TA_MSB
| data );
for ( i = 0; i < 20; i++ )
{
miiReg = READ_REGISTER( MIFBitBangFrame_Output );
if ( miiReg & kMIFBitBangFrame_Output_TA_LSB )
{
ELG( data, phyId << 16 | reg, 'miiW', "UniNEnet::miiWriteWord" );
return true;
}
IODelay( 10 );
}
ELG( data, phyId << 16 | reg, 'miW-', "UniNEnet::miiWriteWord - failed" );
return false;
}/* end miiWriteWord */
bool UniNEnet::miiResetPHY()
{
int i = MII_RESET_TIMEOUT;
UInt16 mii_control;
ELG( i, phyId, 'RstP', "UniNEnet::miiResetPHY" );
miiWriteWord( MII_CONTROL_RESET, MII_CONTROL ); // Set the reset bit
IOSleep( MII_RESET_DELAY );
// Wait till reset process is complete (MII_CONTROL_RESET returns to zero)
while ( i > 0 )
{
if ( miiReadWord( &mii_control, MII_CONTROL ) == false )
return false;
if ( !(mii_control & MII_CONTROL_RESET) )
{
miiReadWord( &mii_control, MII_CONTROL );
mii_control &= ~MII_CONTROL_ISOLATE;
miiWriteWord( mii_control, MII_CONTROL );
return true;
}
IOSleep( MII_RESET_DELAY );
i -= MII_RESET_DELAY;
}/* end WHILE */
return false;
}/* end miiResetPHY */
bool UniNEnet::miiWaitForAutoNegotiation()
{
int i = MII_LINK_TIMEOUT;
UInt16 mii_status;
ELG( i, phyId, 'miWA', "UniNEnet::miiWaitForAutoNegotiation" );
while ( i > 0 )
{
if ( miiReadWord( &mii_status, MII_STATUS ) == false )
return false;
if ( mii_status & MII_STATUS_NEGOTIATION_COMPLETE )
return true;
IOSleep( MII_LINK_DELAY );
i -= MII_LINK_DELAY;
}/* end WHILE */
return false;
}/* end miiWaitForAutoNegotiation */