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/*
* Broadcom BCM5221 Ethernet PHY
*
* (C) Copyright 2005 REA Elektronik GmbH <www.rea.de>
* Anders Larsen <alarsen@rea.de>
*
* (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
*/
#include <at91rm9200_net.h>
#include <net.h>
#include <bcm5221.h>
#ifdef CONFIG_DRIVER_ETHER
#if (CONFIG_COMMANDS & CFG_CMD_NET)
/*
* Name:
* bcm5221_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 bcm5221_IsPhyConnected (AT91PS_EMAC p_mac)
{
unsigned short Id1, Id2;
at91rm9200_EmacEnableMDIO (p_mac);
at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID1, &Id1);
at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID2, &Id2);
at91rm9200_EmacDisableMDIO (p_mac);
if ((Id1 == (BCM5221_PHYID1_OUI >> 6)) &&
((Id2 >> 10) == (BCM5221_PHYID1_OUI & BCM5221_LSB_MASK)))
return TRUE;
return FALSE;
}
/*
* Name:
* bcm5221_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
*/
unsigned char bcm5221_GetLinkSpeed (AT91PS_EMAC p_mac)
{
unsigned short stat1, stat2;
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &stat1))
return FALSE;
if (!(stat1 & BCM5221_LINK_STATUS)) /* link status up? */
return FALSE;
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ACSR, &stat2))
return FALSE;
if ((stat1 & BCM5221_100BASE_TX_FD) && (stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
/*set Emac for 100BaseTX and Full Duplex */
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
return TRUE;
}
if ((stat1 & BCM5221_10BASE_T_FD) && !(stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
/*set MII for 10BaseT and Full Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_FD;
return TRUE;
}
if ((stat1 & BCM5221_100BASE_TX_HD) && (stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
/*set MII for 100BaseTX and Half Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_SPD;
return TRUE;
}
if ((stat1 & BCM5221_10BASE_T_HD) && !(stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
/*set MII for 10BaseT and Half Duplex */
p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
return TRUE;
}
return FALSE;
}
/*
* Name:
* bcm5221_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
*/
unsigned char bcm5221_InitPhy (AT91PS_EMAC p_mac)
{
unsigned char ret = TRUE;
unsigned short IntValue;
at91rm9200_EmacEnableMDIO (p_mac);
if (!bcm5221_GetLinkSpeed (p_mac)) {
/* Try another time */
ret = bcm5221_GetLinkSpeed (p_mac);
}
/* Disable PHY Interrupts */
at91rm9200_EmacReadPhy (p_mac, BCM5221_INTR, &IntValue);
/* clear FDX LED and INTR Enable */
IntValue &= ~(BCM5221_FDX_LED | BCM5221_INTR_ENABLE);
/* set FDX, SPD, Link, INTR masks */
IntValue |= (BCM5221_FDX_MASK | BCM5221_SPD_MASK |
BCM5221_LINK_MASK | BCM5221_INTR_MASK);
at91rm9200_EmacWritePhy (p_mac, BCM5221_INTR, &IntValue);
at91rm9200_EmacDisableMDIO (p_mac);
return (ret);
}
/*
* Name:
* bcm5221_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
*/
unsigned char bcm5221_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
{
unsigned short value;
unsigned short PhyAnar;
unsigned short PhyAnalpar;
/* Set bcm5221 control register */
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
value &= ~BCM5221_AUTONEG; /* remove autonegotiation enable */
value |= BCM5221_ISOLATE; /* Electrically isolate PHY */
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
/* Set the Auto_negotiation Advertisement Register */
/* MII advertising for 100BaseTxFD and HD, 10BaseTFD and HD, IEEE 802.3 */
PhyAnar = BCM5221_TX_FDX | BCM5221_TX_HDX |
BCM5221_10_FDX | BCM5221_10_HDX | BCM5221_AN_IEEE_802_3;
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_ANAR, &PhyAnar))
return FALSE;
/* Read the Control Register */
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
value |= BCM5221_SPEED_SELECT | BCM5221_AUTONEG | BCM5221_DUPLEX_MODE;
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
/* Restart Auto_negotiation */
value |= BCM5221_RESTART_AUTONEG;
value &= ~BCM5221_ISOLATE;
if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
return FALSE;
/*check AutoNegotiate complete */
udelay (10000);
at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &value);
if (!(value & BCM5221_AUTONEG_COMP))
return FALSE;
/* Get the AutoNeg Link partner base page */
if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ANLPAR, &PhyAnalpar))
return FALSE;
if ((PhyAnar & BCM5221_TX_FDX) && (PhyAnalpar & BCM5221_TX_FDX)) {
/*set MII for 100BaseTX and Full Duplex */
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
return TRUE;
}
if ((PhyAnar & BCM5221_10_FDX) && (PhyAnalpar & BCM5221_10_FDX)) {
/*set MII for 10BaseT and Full Duplex */
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_FD;
return TRUE;
}
return FALSE;
}
#endif /* CONFIG_COMMANDS & CFG_CMD_NET */
#endif /* CONFIG_DRIVER_ETHER */
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