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232 lines
6.4 KiB
C
232 lines
6.4 KiB
C
/*
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* Broadcom BCM5221 Ethernet PHY
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*
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* (C) Copyright 2005 REA Elektronik GmbH <www.rea.de>
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* Anders Larsen <alarsen@rea.de>
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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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#include <at91rm9200_net.h>
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#include <net.h>
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#include <bcm5221.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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* bcm5221_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 bcm5221_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, BCM5221_PHYID1, &Id1);
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at91rm9200_EmacReadPhy (p_mac, BCM5221_PHYID2, &Id2);
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at91rm9200_EmacDisableMDIO (p_mac);
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if ((Id1 == (BCM5221_PHYID1_OUI >> 6)) &&
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((Id2 >> 10) == (BCM5221_PHYID1_OUI & BCM5221_LSB_MASK)))
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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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* bcm5221_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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unsigned char bcm5221_GetLinkSpeed (AT91PS_EMAC p_mac)
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{
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unsigned short stat1, stat2;
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if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMSR, &stat1))
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return FALSE;
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if (!(stat1 & BCM5221_LINK_STATUS)) /* link status up? */
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return FALSE;
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if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ACSR, &stat2))
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return FALSE;
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if ((stat1 & BCM5221_100BASE_TX_FD) && (stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
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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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return TRUE;
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}
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if ((stat1 & BCM5221_10BASE_T_FD) && !(stat2 & BCM5221_100) && (stat2 & BCM5221_FDX)) {
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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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return TRUE;
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}
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if ((stat1 & BCM5221_100BASE_TX_HD) && (stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
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/*set MII 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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return TRUE;
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}
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if ((stat1 & BCM5221_10BASE_T_HD) && !(stat2 & BCM5221_100) && !(stat2 & BCM5221_FDX)) {
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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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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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* bcm5221_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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unsigned char bcm5221_InitPhy (AT91PS_EMAC p_mac)
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{
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unsigned char ret = TRUE;
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unsigned short IntValue;
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at91rm9200_EmacEnableMDIO (p_mac);
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if (!bcm5221_GetLinkSpeed (p_mac)) {
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/* Try another time */
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ret = bcm5221_GetLinkSpeed (p_mac);
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}
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/* Disable PHY Interrupts */
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at91rm9200_EmacReadPhy (p_mac, BCM5221_INTR, &IntValue);
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/* clear FDX LED and INTR Enable */
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IntValue &= ~(BCM5221_FDX_LED | BCM5221_INTR_ENABLE);
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/* set FDX, SPD, Link, INTR masks */
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IntValue |= (BCM5221_FDX_MASK | BCM5221_SPD_MASK |
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BCM5221_LINK_MASK | BCM5221_INTR_MASK);
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at91rm9200_EmacWritePhy (p_mac, BCM5221_INTR, &IntValue);
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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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* bcm5221_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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unsigned char bcm5221_AutoNegotiate (AT91PS_EMAC p_mac, int *status)
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{
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unsigned short value;
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unsigned short PhyAnar;
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unsigned short PhyAnalpar;
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/* Set bcm5221 control register */
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if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
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return FALSE;
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value &= ~BCM5221_AUTONEG; /* remove autonegotiation enable */
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value |= BCM5221_ISOLATE; /* Electrically isolate PHY */
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if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
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return FALSE;
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/* Set the Auto_negotiation Advertisement Register */
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/* MII advertising for 100BaseTxFD and HD, 10BaseTFD and HD, IEEE 802.3 */
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PhyAnar = BCM5221_TX_FDX | BCM5221_TX_HDX |
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BCM5221_10_FDX | BCM5221_10_HDX | BCM5221_AN_IEEE_802_3;
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if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_ANAR, &PhyAnar))
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return FALSE;
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/* Read the Control Register */
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if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_BMCR, &value))
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return FALSE;
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value |= BCM5221_SPEED_SELECT | BCM5221_AUTONEG | BCM5221_DUPLEX_MODE;
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if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_BMCR, &value))
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return FALSE;
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/* Restart Auto_negotiation */
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value |= BCM5221_RESTART_AUTONEG;
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value &= ~BCM5221_ISOLATE;
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if (!at91rm9200_EmacWritePhy (p_mac, BCM5221_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, BCM5221_BMSR, &value);
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if (!(value & BCM5221_AUTONEG_COMP))
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return FALSE;
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/* Get the AutoNeg Link partner base page */
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if (!at91rm9200_EmacReadPhy (p_mac, BCM5221_ANLPAR, &PhyAnalpar))
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return FALSE;
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if ((PhyAnar & BCM5221_TX_FDX) && (PhyAnalpar & BCM5221_TX_FDX)) {
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/*set MII for 100BaseTX and Full Duplex */
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p_mac->EMAC_CFG |= AT91C_EMAC_SPD | AT91C_EMAC_FD;
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return TRUE;
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}
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if ((PhyAnar & BCM5221_10_FDX) && (PhyAnalpar & BCM5221_10_FDX)) {
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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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return TRUE;
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}
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return FALSE;
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}
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#endif
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#endif /* CONFIG_DRIVER_ETHER */
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