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