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/*
* (C) Copyright 2006
* Author : Eric Benard (Eukrea Electromatique)
* based on dm9161.c which is :
* (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 <ks8721.h>
#ifdef CONFIG_DRIVER_ETHER
#if defined(CONFIG_CMD_NET)
/*
* Name:
* ks8721_isphyconnected
* Description:
* Reads the 2 PHY ID registers
* Arguments:
* p_mac - pointer to AT91S_EMAC struct
* Return value:
* 1 - if id read successfully
* 0 - if error
*/
unsigned int ks8721_isphyconnected(AT91PS_EMAC p_mac)
{
unsigned short id1, id2;
at91rm9200_EmacEnableMDIO(p_mac);
at91rm9200_EmacReadPhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_PHYID1, &id1);
at91rm9200_EmacReadPhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_PHYID2, &id2);
at91rm9200_EmacDisableMDIO(p_mac);
if ((id1 == (KS8721_PHYID_OUI >> 6)) &&
((id2 >> 10) == (KS8721_PHYID_OUI & KS8721_LSB_MASK))) {
if ((id2 & KS8721_MODELMASK) == KS8721BL_MODEL)
printf("Micrel KS8721bL PHY detected : ");
else
printf("Unknown Micrel PHY detected : ");
return 1;
}
return 0;
}
/*
* Name:
* ks8721_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:
* 1 - if link status set succesfully
* 0 - if link status not set
*/
unsigned char ks8721_getlinkspeed(AT91PS_EMAC p_mac)
{
unsigned short stat1;
if (!at91rm9200_EmacReadPhy(p_mac, KS8721_BMSR, &stat1))
return 0;
if (!(stat1 & KS8721_LINK_STATUS)) {
/* link status up? */
printf("Link Down !\n");
return 0;
}
if (stat1 & KS8721_100BASE_TX_FD) {
/* set Emac for 100BaseTX and Full Duplex */
printf("100BT FD\n");
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
return 1;
}
if (stat1 & KS8721_10BASE_T_FD) {
/* set MII for 10BaseT and Full Duplex */
printf("10BT FD\n");
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_FD;
return 1;
}
if (stat1 & KS8721_100BASE_T4_HD) {
/* set MII for 100BaseTX and Half Duplex */
printf("100BT HD\n");
p_mac->EMAC_CFG = (p_mac->EMAC_CFG &
~(AT91C_EMAC_SPD | AT91C_EMAC_FD))
| AT91C_EMAC_SPD;
return 1;
}
if (stat1 & KS8721_10BASE_T_HD) {
/* set MII for 10BaseT and Half Duplex */
printf("10BT HD\n");
p_mac->EMAC_CFG &= ~(AT91C_EMAC_SPD | AT91C_EMAC_FD);
return 1;
}
return 0;
}
/*
* Name:
* ks8721_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:
* 1 - if link status set succesfully
* 0 - if link status not set
*/
unsigned char ks8721_initphy(AT91PS_EMAC p_mac)
{
unsigned char ret = 1;
unsigned short intvalue;
at91rm9200_EmacEnableMDIO(p_mac);
/* Try another time */
if (!ks8721_getlinkspeed(p_mac))
ret = ks8721_getlinkspeed(p_mac);
/* Disable PHY Interrupts */
intvalue = 0;
at91rm9200_EmacWritePhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_MDINTR, &intvalue);
at91rm9200_EmacDisableMDIO(p_mac);
return ret;
}
/*
* Name:
* ks8721_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:
* 1 - if link status set successfully
* 0 - if link status not set
*/
unsigned char ks8721_autonegotiate(AT91PS_EMAC p_mac, int *status)
{
unsigned short value;
unsigned short phyanar;
unsigned short phyanalpar;
/* Set ks8721 control register */
if (!at91rm9200_EmacReadPhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_BMCR, &value))
return 0;
/* remove autonegotiation enable */
value &= ~KS8721_AUTONEG;
/* Electrically isolate PHY */
value |= KS8721_ISOLATE;
if (!at91rm9200_EmacWritePhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_BMCR, &value)) {
return 0;
}
/*
* Set the Auto_negotiation Advertisement Register
* MII advertising for Next page, 100BaseTxFD and HD,
* 10BaseTFD and HD, IEEE 802.3
*/
phyanar = KS8721_NP | KS8721_TX_FDX | KS8721_TX_HDX |
KS8721_10_FDX | KS8721_10_HDX | KS8721_AN_IEEE_802_3;
if (!at91rm9200_EmacWritePhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_ANAR, &phyanar)) {
return 0;
}
/* Read the Control Register */
if (!at91rm9200_EmacReadPhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_BMCR, &value)) {
return 0;
}
value |= KS8721_SPEED_SELECT | KS8721_AUTONEG | KS8721_DUPLEX_MODE;
if (!at91rm9200_EmacWritePhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_BMCR, &value)) {
return 0;
}
/* Restart Auto_negotiation */
value |= KS8721_RESTART_AUTONEG;
value &= ~KS8721_ISOLATE;
if (!at91rm9200_EmacWritePhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_BMCR, &value)) {
return 0;
}
/* Check AutoNegotiate complete */
udelay(10000);
at91rm9200_EmacReadPhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_BMSR, &value);
if (!(value & KS8721_AUTONEG_COMP))
return 0;
/* Get the AutoNeg Link partner base page */
if (!at91rm9200_EmacReadPhy(p_mac,
CONFIG_PHY_ADDRESS | KS8721_ANLPAR, &phyanalpar)) {
return 0;
}
if ((phyanar & KS8721_TX_FDX) && (phyanalpar & KS8721_TX_FDX)) {
/* Set MII for 100BaseTX and Full Duplex */
p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
return 1;
}
if ((phyanar & KS8721_10_FDX) && (phyanalpar & KS8721_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 1;
}
return 0;
}
#endif /* CONFIG_CMD_NET */
#endif /* CONFIG_DRIVER_ETHER */