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/*
*
* (C) Copyright 2003
* Author : Hamid Ikdoumi (Atmel)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
/*
* Adapted for KwikByte KB920x board: 22APR2005
*/
#include <common.h>
#include <at91rm9200_net.h>
#include <net.h>
#include <miiphy.h>
#include <lxt971a.h>
#ifdef CONFIG_DRIVER_ETHER
#if defined(CONFIG_CMD_NET)
/*
* Name:
* lxt972_IsPhyConnected
* Description:
* Reads the 2 PHY ID registers
* Arguments:
* p_mac - pointer to AT91S_EMAC struct
* Return value:
* TRUE - if id read successfully
* FALSE- if error
*/
unsigned int lxt972_IsPhyConnected (AT91PS_EMAC p_mac)
{
unsigned short Id1, Id2;
at91rm9200_EmacEnableMDIO (p_mac);
at91rm9200_EmacReadPhy(p_mac, PHY_PHYIDR1, &Id1);
at91rm9200_EmacReadPhy(p_mac, PHY_PHYIDR2, &Id2);
at91rm9200_EmacDisableMDIO (p_mac);
if ((Id1 == (0x0013)) && ((Id2 & 0xFFF0) == 0x78E0))
return TRUE;
return FALSE;
}
/*
* Name:
* lxt972_GetLinkSpeed
* Description:
* Link parallel detection status of MAC is checked and set in the
* MAC configuration registers
* Arguments:
* p_mac - pointer to MAC
* Return value:
* TRUE - if link status set succesfully
* FALSE - if link status not set
*/
UCHAR lxt972_GetLinkSpeed (AT91PS_EMAC p_mac)
{
unsigned short stat1;
if (!at91rm9200_EmacReadPhy (p_mac, PHY_LXT971_STAT2, &stat1))
return FALSE;
if (!(stat1 & PHY_LXT971_STAT2_LINK)) /* link status up? */
return FALSE;
if (stat1 & PHY_LXT971_STAT2_100BTX) {
if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
/*set Emac for 100BaseTX and Full Duplex */
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
} else {
/*set Emac for 100BaseTX and Half Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_SPD;
}
return TRUE;
} else {
if (stat1 & PHY_LXT971_STAT2_DUPLEX_MODE) {
/*set MII for 10BaseT and Full Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_FD;
} else {
/*set MII for 10BaseT and Half Duplex */
p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
}
return TRUE;
}
return FALSE;
}
/*
* Name:
* lxt972_InitPhy
* Description:
* MAC starts checking its link by using parallel detection and
* Autonegotiation and the same is set in the MAC configuration registers
* Arguments:
* p_mac - pointer to struct AT91S_EMAC
* Return value:
* TRUE - if link status set succesfully
* FALSE - if link status not set
*/
UCHAR lxt972_InitPhy (AT91PS_EMAC p_mac)
{
UCHAR ret = TRUE;
at91rm9200_EmacEnableMDIO (p_mac);
if (!lxt972_GetLinkSpeed (p_mac)) {
/* Try another time */
ret = lxt972_GetLinkSpeed (p_mac);
}
/* Disable PHY Interrupts */
at91rm9200_EmacWritePhy (p_mac, PHY_LXT971_INT_ENABLE, 0);
at91rm9200_EmacDisableMDIO (p_mac);
return (ret);
}
/*
* Name:
* lxt972_AutoNegotiate
* Description:
* MAC Autonegotiates with the partner status of same is set in the
* MAC configuration registers
* Arguments:
* dev - pointer to struct net_device
* Return value:
* TRUE - if link status set successfully
* FALSE - if link status not set
*/
UCHAR lxt972_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
{
unsigned short value;
/* Set lxt972 control register */
if (!at91rm9200_EmacReadPhy (p_mac, PHY_BMCR, &value))
return FALSE;
/* Restart Auto_negotiation */
value |= PHY_BMCR_RST_NEG;
if (!at91rm9200_EmacWritePhy (p_mac, PHY_BMCR, &value))
return FALSE;
/*check AutoNegotiate complete */
udelay (10000);
at91rm9200_EmacReadPhy(p_mac, PHY_BMSR, &value);
if (!(value & PHY_BMSR_AUTN_COMP))
return FALSE;
return (lxt972_GetLinkSpeed (p_mac));
}
#endif
#endif /* CONFIG_DRIVER_ETHER */
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