/*+
* file: mactophy.c
*
* Copyright (C) 1992-1995 by
* Digital Equipment Corporation, Maynard, Massachusetts.
* All rights reserved.
*
* This software is furnished under a license and may be used and copied
* only in accordance of the terms of such license and with the
* inclusion of the above copyright notice. This software or any other
* copies thereof may not be provided or otherwise made available to any
* other person. No title to and ownership of the software is hereby
* transferred.
*
* The information in this software is subject to change without notice
* and should not be construed as a commitment by digital equipment
* corporation.
*
* Digital assumes no responsibility for the use or reliability of its
* software on equipment which is not supplied by digital.
*
*
* Abstract: This file contains the code to access the MII PHY device
* (initialization, set the connections, and sensing of the
* link.
*
* Author: Claudio Hazan
*
* Revision History:
*
* 15-Oct-95 ch Creation
* 20-Dec-95 phk Cleanup, add support for DC21142
*
-*/
#include <precomp.h>
#define LINK_PASS_MAX_LOOP 350
#define LINK_PASS_DELAY (10*MILLISECOND)
#if MII_DBG
PUCHAR MiiMediumString[] = {
"","","","","","","","","",
"Mii10BaseT",
"Mii10BaseT_FD",
"Mii10Base2",
"Mii10Base5",
"Mii100BaseTx",
"Mii100BaseTx_FD",
"Mii100BaseT4",
"Mii100BaseFx",
"Mii100BaseFx_FD"
};
#endif
/*+
* DC21X4PhyInit
*
* Routine Description:
*
* This routine initializes each PHY present in the SROM; Reset each Phy
* if there is a Reset sequence specified there, Initializes the Phys and
* updates the Capabilities tables from the values contained in the SROM
* with the values supported by the Phys.
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
*
* Return Value:
*
* True if any PHY was succesfully initialized.
*
-*/
extern
BOOLEAN
DC21X4PhyInit(
IN PDC21X4_ADAPTER Adapter
)
{
BOOLEAN PhyPresent;
BOOLEAN ConnectionPresent=FALSE;
USHORT Capabilities;
INT PhyNumber;
INT Seq;
ULONG Data;
#if MII_DBG
DbgPrint("DC21X4PhyInit\n");
#endif
// Reset all the phys using its reset sequence.
if (!Adapter->PhyMediumInSrom) {
#if __DBG
DbgPrint("No PHY Media in SROM\n");
#endif
return FALSE;
}
#if __DBG
DbgPrint("PHY Reset\n");
#endif
Adapter->Force10 = FALSE;
for (PhyNumber=0; PhyNumber < MAX_PHY_TABLE; PhyNumber++) {
if (Adapter->Phy[Adapter->PhyNumber].ResetSequenceLength != 0) {
DC21X4WriteGepRegister(
Adapter,
(ULONG)Adapter->Phy[Adapter->PhyNumber].GeneralPurposeCtrl
);
for (Seq=0; Seq < Adapter->Phy[Adapter->PhyNumber].ResetSequenceLength; Seq++) {
#if MII_DBG
DbgPrint("Sequence[%d]=%04x\n", Seq, Adapter->Phy[PhyNumber].ResetSequence[Seq]);
#endif
DELAY (5); // 5 microseconds
DC21X4WriteGepRegister(
Adapter,
(ULONG)Adapter->Phy[Adapter->PhyNumber].ResetSequence[Seq]
);
}
}
}
Adapter->PhyNumber = 0;
PhyPresent = MiiGenInit(Adapter);
if (PhyPresent) {
#if __DBG
DbgPrint("Phy: Initialization OK\n");
#endif
Capabilities = MiiGenGetCapabilities(Adapter);
// Convert the MediaType to the MiiMediaType values
Adapter->MiiMediaType =
ConvertMediaTypeToMiiType[Adapter->MediaType & MEDIA_MASK]
| (Adapter->MediaType & CONTROL_MASK);
#if MII_DBG
DbgPrint("Translate MediaType %x to MiiMediaType %x\n",
Adapter->MediaType,Adapter->MiiMediaType);
#endif
Adapter->PhyNwayCapable = ( ((Adapter->MiiMediaType & MEDIA_NWAY) != 0)
&& ((Capabilities & MiiPhyNwayCapable) != 0)
);
// Merge the PHY Capabilities with the medium stored in SROM
for (PhyNumber=0; PhyNumber < MAX_PHY_TABLE; PhyNumber++) {
Adapter->Phy[PhyNumber].MediaCapabilities &= Capabilities;
Adapter->Phy[PhyNumber].MediaCapabilities |= (Capabilities & MiiPhyNwayCapable);
#if MII_DBG
DbgPrint("Merged Capabilities (SROM&PHY)= %04x\n", Adapter->Phy[PhyNumber].MediaCapabilities);
#endif
Adapter->MiiGen.Phys[PhyNumber]->PhyCapabilities = Adapter->Phy[PhyNumber].MediaCapabilities;
}
}
if (PhyPresent) {
#if MII_DBG
DbgPrint("Check if Connection is supported\n");
#endif
// Now check the Connection.
ConnectionPresent = MiiGenCheckConnection(
Adapter,
(USHORT)Adapter->MiiMediaType
);
if (!ConnectionPresent) {
//Force the Phy to 10
DC21X4SetPhyControl(
Adapter,
MiiGenAdminForce10
);
}
}
return (PhyPresent && ConnectionPresent);
}
/*+
* DC21X4SetPhyConnection
*
* Routine Description:
*
* This function first resets the MAC (which could reset the PHY) and
* initialize CSR6 and CSR12 registers. Then sets the PHY to
* the required medium.
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
*
* Return Value:
*
* True if the requested Medium is supported by the Phy.
*
-*/
extern
BOOLEAN
DC21X4SetPhyConnection(
IN PDC21X4_ADAPTER Adapter
)
{
BOOLEAN MediaSupported;
// First set Mac Connection.
#if MII_DBG
DbgPrint("DC21X4SetPhyConnection\n");
#endif
SetMacConnection(Adapter);
// Now set the PHY Connection.
MediaSupported = MiiGenSetConnection(
Adapter,
Adapter->MiiMediaType,
Adapter->Phy[Adapter->PhyNumber].NwayAdvertisement
);
return MediaSupported;
}
/*+
* SetMacConnection
*
* Routine Description:
*
* This function initialize the CSR6 and CSR12 registers according to the
* values present in the SROM for the Selected Medium.
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
*
* Return Value:
*
*
-*/
void
SetMacConnection(
IN PDC21X4_ADAPTER Adapter
)
{
USHORT MediaPositionMask;
ULONG OperationMode;
#if MII_DBG
DbgPrint("SetMacConnection\n");
#endif
// First of all find the media type.
MediaPositionMask = MediaBitTable[(Adapter->MiiMediaType & MEDIA_MASK)];
#if MII_DBG
DbgPrint(" MiiMediaType %04x Bitmap %04x\n",
Adapter->MiiMediaType,MediaPositionMask);
#endif
// If unknown media, just return.
if (MediaPositionMask == 0) {
#if __DBG
DbgPrint("UNKNOWN Phy Medium %x!!!\n",Adapter->MiiMediaType);
#endif
return;
}
// select Port_Select MII (disable HEARTBEAT in MII mode).
OperationMode = Adapter->OperationMode | (DC21X4_PORT_SELECT | DC21X4_HEARTBEAT_DISABLE);
if (Adapter->Phy[Adapter->PhyNumber].MediaCapabilities & MediaPositionMask) {
if (Adapter->Phy[Adapter->PhyNumber].FullDuplexBits & MediaPositionMask) {
// Set FullDuplex bit
OperationMode |= DC21X4_FULL_DUPLEX_MODE;
}
else {
//Reset FullDuplex bit
OperationMode &= ~DC21X4_FULL_DUPLEX_MODE;
}
if (Adapter->Phy[Adapter->PhyNumber].TxThresholdModeBits & MediaPositionMask) {
// Set TTM bit
OperationMode &= ~(Adapter->Threshold100Mbps);
OperationMode |= (DC21X4_TXM_THRESHOLD_MODE | Adapter->Threshold10Mbps);
}
else {
// Reset TTM bit
OperationMode &= ~(DC21X4_TXM_THRESHOLD_MODE | Adapter->Threshold10Mbps);
OperationMode |= Adapter->Threshold100Mbps;
}
#if __DBG
DbgPrint("SetMacConnection:%s FullDuplex & %s TTM bits in CSR6\n",
OperationMode & DC21X4_FULL_DUPLEX_MODE ? "Set" : "Reset",
OperationMode & DC21X4_TXM_THRESHOLD_MODE ? "Set" : "Reset");
#endif
}
// Switch Medium:
DC21X4IndicateMediaStatus(
Adapter,
LinkFail
);
// if TTM or FDX setting has changed, stop the TXM and RCV process before modifying
// these modes
if ((OperationMode & DC21X4_MODE_MASK) != (Adapter->OperationMode & DC21X4_MODE_MASK) ) {
#if MII_DBG
DbgPrint("FDX or TTM setting has changed: stop RCV and TXM\n");
#endif
DC21X4StopReceiverAndTransmitter(Adapter);
}
switch (Adapter->DeviceId) {
case DC21142_CFID:
//Initialize the Sia Registers for MII operation
// Reset Sia (CSR13)
// Turn off the BNC transceiver (CSR15)
// Disable Autonegotiation (CSR14)
DC21X4_WRITE_PORT(
DC21X4_SIA_MODE_0,
DC21X4_RESET_SIA
);
Adapter->Gep_Sia2 =
(DC21142_SIA2_10BT & DC21142_SIA2_MASK)
| (Adapter->Gep_Sia2 & DC21142_GEP_MASK);
DC21X4_WRITE_PORT(
DC21X4_SIA_MODE_2,
Adapter->Gep_Sia2
);
DC21X4_WRITE_PORT(
DC21X4_SIA_MODE_1,
0
);
break;
}
// Init the Command Register.
Adapter->OperationMode = OperationMode;
#if __DBG
DbgPrint("SetMacConnection: Write CSR6=%08x\n", OperationMode);
#endif
DC21X4_WRITE_PORT(
DC21X4_OPERATION_MODE,
Adapter->OperationMode
);
DELAY(5);
DC21X4InitializeGepRegisters(Adapter,TRUE);
}
/*+
* DC21X4MiiAutoDetect
*
* Routine Description:
*
* This function contains the power up autosensing for PHYs.
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
*
* Return Value:
*
* Link status
*
-*/
extern
BOOLEAN
DC21X4MiiAutoDetect(
IN PDC21X4_ADAPTER Adapter
)
{
ULONG OperationMode;
INT Loop;
USHORT ConnectionStatus;
USHORT TmpMedia;
BOOLEAN Link;
#if MII_DBG
ULONG Status;
#endif
Link = MiiGenGetConnectionStatus(
Adapter,
&ConnectionStatus
);
DC21X4IndicateMediaStatus(
Adapter,
Link ? MiiLinkPass : LinkFail
);
// If no link available while still negotiating, continue to
// check the link up to 3s.
if (!Link) {
#if MII_DBG
Loop = 30;
#else
Loop = LINK_PASS_MAX_LOOP;
#endif
while (!Link && Loop--) {
#if MII_DBG
DbgPrint("LinkPass=FALSE: wait up to 3 seconds %d\n", Loop);
#endif
DELAY(LINK_PASS_DELAY);
Link = MiiGenGetConnectionStatus(
Adapter,
&ConnectionStatus
);
}
DC21X4IndicateMediaStatus(
Adapter,
Link ? MiiLinkPass : LinkFail
);
}
#if MII_DBG
DC21X4_READ_PORT(
DC21X4_OPERATION_MODE,
&Status
);
DbgPrint("CSR6= %08x, OperationMode=%08x\n", Status, Adapter->OperationMode);
#endif
// In AutoSense mode, we must know which media has been chosen to set the MAC.
// otherwise the MAC has been already set.
if (Adapter->MiiMediaType & MEDIA_AUTOSENSE){
#if MII_DBG
DbgPrint("AutoSense to check which Medium was chosen\n");
#endif
Link = MiiGenGetConnection(
Adapter,
&TmpMedia
);
DC21X4IndicateMediaStatus(
Adapter,
Link ? MiiLinkPass : LinkFail
);
if (Link){
#if MII_DBG
DbgPrint("LinkPass= TRUE; Medium = %s\n",
MiiMediumString[TmpMedia&MEDIA_MASK]);
#endif
Adapter->MiiMediaType = (TmpMedia | MEDIA_AUTOSENSE);
SetMacConnection(Adapter);
}
}
if ( !Link
&& (Adapter->MediaCapable)
&& (Adapter->MiiMediaType & MEDIA_AUTOSENSE)
) {
//Switch back to the non_MII port
SelectNonMiiPort(Adapter);
}
return Link;
}
/*+
* DC21X4DynamicMiiAutoSense
*
* Routine Description:
*
* This function performs the PHY Dynamic Autosense
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
*
* Return Value:
*
* Link status
*
-*/
extern
BOOLEAN
DC21X4MiiAutoSense(
IN PDC21X4_ADAPTER Adapter
)
{
ULONG OperationMode;
USHORT CurrentMedia;
USHORT ConnectionStatus;
BOOLEAN Link;
BOOLEAN SwitchPort=FALSE;
#if MII_DBG
DbgPrint("DC21X4MiiAutoSense\n");
#endif
Link = MiiGenGetConnectionStatus(
Adapter,
&ConnectionStatus
);
#if MII_DBG
DbgPrint("MiiMediaType = %04x, ConnectionStatus = %04x\n",
Adapter->MiiMediaType, ConnectionStatus);
#endif
if (Adapter->MiiMediaType & MEDIA_AUTOSENSE) {
if (Link &&
((ConnectionStatus & MEDIA_STATUS_MASK) == MEDIA_LINK_PASS_WITH_PF)){
// There was a link failure
// Check the current medium
Link = MiiGenGetConnection(
Adapter,
&CurrentMedia
);
if ( Link
&& ( (Adapter->MiiMediaType != CurrentMedia)
|| (Adapter->LinkStatus != MiiLinkPass)
)
){
//The link is up but the medium has changed
#if MII_DBG
DbgPrint("Mii Medium has changed: New Mii Medium = %s \n",
MiiMediumString[CurrentMedia&MEDIA_MASK]);
#endif
Adapter->MiiMediaType = (CurrentMedia | MEDIA_AUTOSENSE);
SetMacConnection(Adapter);
}
}
}
// do not indicate the Mii Link down transition
// if the non_Mii link is up.
// In any other case indicate the transition
if (Link || (Adapter->LinkStatus != LinkPass)) {
DC21X4IndicateMediaStatus(
Adapter,
Link ? MiiLinkPass : LinkFail
);
}
if ( !Link
&& (Adapter->MediaCapable)
&& (Adapter->MiiMediaType & MEDIA_AUTOSENSE)
) {
if ((ConnectionStatus & MEDIA_STATUS_MASK) == MEDIA_READ_REGISTER_FAILED){
//PHY is not connected anymore
Adapter->PhyPresent=FALSE;
if (Adapter->MediaType & MEDIA_NWAY) {
//Enable Nway Negotiation
DC21X4EnableNway (Adapter);
SwitchPort=TRUE;
}
}
else if (Adapter->OperationMode & DC21X4_PORT_SELECT){
// Mii link is down,current port is Mii,
// at least one non Mii port is populated:
//Switch Port_Select to enable the non MII ports
SwitchPort = TRUE;
}
if (SwitchPort) {
SelectNonMiiPort(Adapter);
}
}
return Link;
}
/*+
* SelectNonMiiPort
*
* Routine Description:
*
* This function selects the DC21X4 non_MII port
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
*
* Return Value:
*
* None
*
-*/
extern
VOID
SelectNonMiiPort(
IN PDC21X4_ADAPTER Adapter
)
{
ULONG OperationMode;
OperationMode = Adapter->OperationMode & ~(DC21X4_MEDIUM_MASK);
OperationMode |= Adapter->Media[Adapter->SelectedMedium].Mode;
if ((OperationMode & DC21X4_MODE_MASK) != (Adapter->OperationMode & DC21X4_MODE_MASK)) {
DC21X4StopReceiverAndTransmitter(Adapter);
}
Adapter->OperationMode = OperationMode;
DC21X4_WRITE_PORT(
DC21X4_OPERATION_MODE,
Adapter->OperationMode
);
DC21X4InitializeMediaRegisters(Adapter,FALSE);
switch (Adapter->SelectedMedium) {
case Medium10Base2:
case Medium10Base5:
DC21X4IndicateMediaStatus(Adapter,LinkPass);
break;
}
}
/*+
* DC21X4SetPhyControl
*
* Routine Description:
*
* This function modifies the PHY Control register.
*
* Arguments:
*
* Adapter - Pointer to the Data Structure
* Control - The Control to perform
*
* Return Value:
*
* none
-*/
extern
VOID
DC21X4SetPhyControl(
PDC21X4_ADAPTER Adapter,
USHORT AdminControl
)
{
MiiGenAdminControl(Adapter, AdminControl);
return;
}
