net_phy.c

AT91SAM7X256微处理器

    if (*perr   != NET_PHY_ERR_NONE) {
        reg_val  = 0;
    }

    if ((reg_val & BMSR_ANEGCOMPLETE) == BMSR_ANEGCOMPLETE) {   /* DM9161AE register 0x01: Basic Status Register #1      */
        return (DEF_ON);                                        /* BIT 5 Signal the result of the auto negotiation       */
    } else {                                                    /* 1 = complete, 0 = incomplete                          */
        return (DEF_OFF);
    }
}


/*
*********************************************************************************************************
*                                     NetNIC_PhyLinkState()
*
* Description : Returns state of ethernet link
*               This instance probe the Davicom DM9161AE '3.3V Dual-Speed Fast Ethernet Transceiver'
*
* Argument(s) : none.
*
* Return(s)   : State of ethernet link (DEF_OFF = link down, DEF_ON = link up).
*
* Caller(s)   : NetNIC_PhyISR_Handler.
*
* Note(s)     : If any error is encountered while reading the PHY, this function
*               will return link state = DEF_OFF.
*********************************************************************************************************
*/

CPU_BOOLEAN  NetNIC_PhyLinkState (NET_ERR *perr)
{
    CPU_INT16U  reg_val;
                                                                /* DM9161AE register 0x01: Basic Status Register #1      */
                                                                /* BIT 2 , Link Status, 1 = linked, 0 = not linked.      */
    reg_val      = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, perr);
    reg_val      = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, perr);

    if (*perr   != NET_PHY_ERR_NONE) {
        reg_val  = 0;
    }

    reg_val     &= BMSR_LSTATUS;

    if (reg_val == BMSR_LSTATUS) {
        return (DEF_ON);
    } else {
        return (DEF_OFF);
    }
}

CPU_BOOLEAN  NetNIC_PhyLinkState2 ()
{
    NET_ERR     err;
    CPU_INT16U  reg_val;


    reg_val      = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, &err);

    if (err == NET_PHY_ERR_NONE) {

        if ((reg_val & BMSR_LSTATUS) != 0) {

            return (DEF_ON);
        } else {

            return (DEF_OFF);
        }

    } else {

        return (DEF_OFF);
    }
}

/*
*********************************************************************************************************
*                                     NetPHY_GetLinkSpeed()
*
* Description : Returns the speed of the current Ethernet link
*               This probes the Davicom DM9161AE '3.3V Dual-Speed Fast Ethernet Transceiver'
*
* Argument(s) : none.
*
* Return(s)   : 0 = No Link, 10 = 10mbps, 100 = 100mbps
*
* Caller(s)   : AT91SAM7X256_EMAC_Init()
*
* Note(s)     : none.
*********************************************************************************************************
*/

CPU_INT32S NetPHY_GetLinkSpeed (NET_ERR *perr)
{
	CPU_INT32U bmsr;
    CPU_INT32U bmcr;
    CPU_INT32U lpa;


    bmsr = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, perr);     /* Get Link Status from PHY status reg. Requires 2 reads */
	bmsr = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, perr);     /* Get Link Status from PHY status reg. Requires 2 reads */

    if ((bmsr & BMSR_LSTATUS) == 0) {
        return (NET_PHY_SPD_0);                                 /* No link                                               */
    }

	bmcr = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMCR, perr);     /* Read the PHY Control Register                         */
	
    if ((bmcr & BMCR_ANENABLE) == BMCR_ANENABLE) {		        /* If AutoNegotiation is enabled                         */
        if ((bmsr & BMSR_ANEGCOMPLETE) == 0) {                  /* If AutoNegotiation is not complete                    */
			return (NET_PHY_SPD_0);       					    /* AutoNegotitation in progress                          */
        }

		lpa = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_LPA, perr);   /* Read the Link Partner Ability Register                */

        if (((lpa & LPA_100FULL) == LPA_100FULL) || ((lpa & LPA_100HALF) == LPA_100HALF)) {
			return (NET_PHY_SPD_100);
        } else {
			return (NET_PHY_SPD_10);
        }
	} else {                                                    /* Auto-negotiation not enabled, get speed from BMCR     */
        if ((bmcr & BMCR_SPEED100) == BMCR_SPEED100) {
            return (NET_PHY_SPD_100);
        } else {
            return (NET_PHY_SPD_10);
        }
	}
}


/*
*********************************************************************************************************
*                                     NetPHY_GetDuplex()
*
* Description : Returns the duplex mode of the current Ethernet link
*               This probes the Davicom DM9161AE '3.3V Dual-Speed Fast Ethernet Transceiver'
*
* Argument(s) : none.
*
* Return(s)   : 0 = Unknown (Auto-Neg in progress), 1 = Half Duplex, 2 = Full Duplex
*
* Caller(s)   : AT91SAM7X256_EMAC_Init()
*
* Note(s)     : none.
*********************************************************************************************************
*/

CPU_INT32S NetPHY_GetLinkDuplex (NET_ERR *perr)
{
    CPU_INT32U bmcr;
    CPU_INT32U bmsr;
    CPU_INT32U lpa;


    bmsr = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, perr);     /* Get Link Status from PHY status reg. Requires 2 reads */
	bmsr = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMSR, perr);     /* Get Link Status from PHY status reg. Requires 2 reads */


    if ((bmsr & BMSR_LSTATUS) == 0) {
        return (NET_PHY_DUPLEX_UNKNOWN);                        /* No link, return 'Duplex Uknown'                       */
    }

	bmcr = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_BMCR, perr);     /* Read the PHY Control Register                         */
	
    if ((bmcr & BMCR_ANENABLE) == BMCR_ANENABLE) {		        /* If AutoNegotiation is enabled                         */
        if ((bmsr & BMSR_ANEGCOMPLETE) == 0) {                  /* If AutoNegotiation is not complete                    */
			return (NET_PHY_DUPLEX_UNKNOWN);      			    /* AutoNegotitation in progress                          */
        }

		lpa = NetNIC_PhyRegRd(AT91C_PHY_ADDR, MII_LPA, perr);   /* Read the Link Partner Ability Register                */

        if (((lpa & LPA_100FULL) == LPA_100FULL) || ((lpa & LPA_10FULL) == LPA_10FULL)) {
			return (NET_PHY_DUPLEX_FULL);
        } else {
            return (NET_PHY_DUPLEX_HALF);
        }
	} else {                                                    /* Auto-negotiation not enabled, get duplex from BMCR    */
        if ((bmcr & BMCR_FULLDPLX) == BMCR_FULLDPLX) {
            return (NET_PHY_DUPLEX_FULL);
        } else {
            return (NET_PHY_DUPLEX_HALF);
        }
	}
}