/* * 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 */