/* * 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 defined(CONFIG_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#endif	/* CONFIG_DRIVER_ETHER */