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marcus.erl |
/*
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mii.c: MII interface library
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Maintained by Jeff Garzik <jgarzik@pobox.com>
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Copyright 2001,2002 Jeff Garzik
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Various code came from myson803.c and other files by
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Donald Becker. Copyright:
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Written 1998-2002 by Donald Becker.
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This software may be used and distributed according
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to the terms of the GNU General Public License (GPL),
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incorporated herein by reference. Drivers based on
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or derived from this code fall under the GPL and must
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retain the authorship, copyright and license notice.
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This file is not a complete program and may only be
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used when the entire operating system is licensed
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under the GPL.
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The author may be reached as becker@scyld.com, or C/O
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Scyld Computing Corporation
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410 Severn Ave., Suite 210
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Annapolis MD 21403
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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/**
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* mii_ethtool_gset - get settings that are specified in @ecmd
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* @mii: MII interface
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* @ecmd: requested ethtool_cmd
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*
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* Returns 0 for success, negative on error.
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*/
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int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
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{
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struct net_device *dev = mii->dev;
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u32 advert, bmcr, lpa, nego;
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u32 advert2 = 0, bmcr2 = 0, lpa2 = 0;
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ecmd->supported =
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(SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
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SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
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SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII);
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if (mii->supports_gmii)
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ecmd->supported |= SUPPORTED_1000baseT_Half |
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SUPPORTED_1000baseT_Full;
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/* only supports twisted-pair */
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ecmd->port = PORT_MII;
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/* only supports internal transceiver */
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ecmd->transceiver = XCVR_INTERNAL;
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/* this isn't fully supported at higher layers */
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ecmd->phy_address = mii->phy_id;
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ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
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advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
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if (mii->supports_gmii)
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advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
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if (advert & ADVERTISE_10HALF)
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ecmd->advertising |= ADVERTISED_10baseT_Half;
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if (advert & ADVERTISE_10FULL)
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ecmd->advertising |= ADVERTISED_10baseT_Full;
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if (advert & ADVERTISE_100HALF)
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ecmd->advertising |= ADVERTISED_100baseT_Half;
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if (advert & ADVERTISE_100FULL)
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ecmd->advertising |= ADVERTISED_100baseT_Full;
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if (advert2 & ADVERTISE_1000HALF)
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ecmd->advertising |= ADVERTISED_1000baseT_Half;
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if (advert2 & ADVERTISE_1000FULL)
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ecmd->advertising |= ADVERTISED_1000baseT_Full;
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bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
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lpa = mii->mdio_read(dev, mii->phy_id, MII_LPA);
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if (mii->supports_gmii) {
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bmcr2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
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lpa2 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000);
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}
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if (bmcr & BMCR_ANENABLE) {
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ecmd->advertising |= ADVERTISED_Autoneg;
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ecmd->autoneg = AUTONEG_ENABLE;
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nego = mii_nway_result(advert & lpa);
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if ((bmcr2 & (ADVERTISE_1000HALF | ADVERTISE_1000FULL)) &
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(lpa2 >> 2))
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ecmd->speed = SPEED_1000;
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else if (nego == LPA_100FULL || nego == LPA_100HALF)
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ecmd->speed = SPEED_100;
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else
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ecmd->speed = SPEED_10;
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if ((lpa2 & LPA_1000FULL) || nego == LPA_100FULL ||
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nego == LPA_10FULL) {
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ecmd->duplex = DUPLEX_FULL;
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mii->full_duplex = 1;
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} else {
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ecmd->duplex = DUPLEX_HALF;
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mii->full_duplex = 0;
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}
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} else {
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ecmd->autoneg = AUTONEG_DISABLE;
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ecmd->speed = ((bmcr & BMCR_SPEED1000 &&
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(bmcr & BMCR_SPEED100) == 0) ? SPEED_1000 :
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(bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10);
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ecmd->duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF;
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}
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/* ignore maxtxpkt, maxrxpkt for now */
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return 0;
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}
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/**
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* mii_ethtool_sset - set settings that are specified in @ecmd
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* @mii: MII interface
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* @ecmd: requested ethtool_cmd
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*
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* Returns 0 for success, negative on error.
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*/
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int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd)
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{
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struct net_device *dev = mii->dev;
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if (ecmd->speed != SPEED_10 &&
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ecmd->speed != SPEED_100 &&
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ecmd->speed != SPEED_1000)
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return -EINVAL;
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if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL)
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return -EINVAL;
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if (ecmd->port != PORT_MII)
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return -EINVAL;
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if (ecmd->transceiver != XCVR_INTERNAL)
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return -EINVAL;
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if (ecmd->phy_address != mii->phy_id)
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return -EINVAL;
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if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE)
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return -EINVAL;
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if ((ecmd->speed == SPEED_1000) && (!mii->supports_gmii))
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return -EINVAL;
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/* ignore supported, maxtxpkt, maxrxpkt */
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if (ecmd->autoneg == AUTONEG_ENABLE) {
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u32 bmcr, advert, tmp;
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u32 advert2 = 0, tmp2 = 0;
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if ((ecmd->advertising & (ADVERTISED_10baseT_Half |
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ADVERTISED_10baseT_Full |
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ADVERTISED_100baseT_Half |
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ADVERTISED_100baseT_Full |
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ADVERTISED_1000baseT_Half |
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ADVERTISED_1000baseT_Full)) == 0)
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return -EINVAL;
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/* advertise only what has been requested */
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advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE);
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tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
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if (mii->supports_gmii) {
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advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
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tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
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}
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if (ecmd->advertising & ADVERTISED_10baseT_Half)
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tmp |= ADVERTISE_10HALF;
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if (ecmd->advertising & ADVERTISED_10baseT_Full)
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tmp |= ADVERTISE_10FULL;
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if (ecmd->advertising & ADVERTISED_100baseT_Half)
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tmp |= ADVERTISE_100HALF;
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if (ecmd->advertising & ADVERTISED_100baseT_Full)
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tmp |= ADVERTISE_100FULL;
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if (mii->supports_gmii) {
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if (ecmd->advertising & ADVERTISED_1000baseT_Half)
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tmp2 |= ADVERTISE_1000HALF;
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if (ecmd->advertising & ADVERTISED_1000baseT_Full)
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tmp2 |= ADVERTISE_1000FULL;
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}
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if (advert != tmp) {
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mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp);
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mii->advertising = tmp;
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}
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if ((mii->supports_gmii) && (advert2 != tmp2))
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mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2);
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/* turn on autonegotiation, and force a renegotiate */
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bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
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bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART);
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mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr);
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mii->force_media = 0;
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} else {
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u32 bmcr, tmp;
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/* turn off auto negotiation, set speed and duplexity */
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bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
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tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 |
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BMCR_SPEED1000 | BMCR_FULLDPLX);
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if (ecmd->speed == SPEED_1000)
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tmp |= BMCR_SPEED1000;
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else if (ecmd->speed == SPEED_100)
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tmp |= BMCR_SPEED100;
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if (ecmd->duplex == DUPLEX_FULL) {
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tmp |= BMCR_FULLDPLX;
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mii->full_duplex = 1;
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} else
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mii->full_duplex = 0;
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if (bmcr != tmp)
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mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp);
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mii->force_media = 1;
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}
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return 0;
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}
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/**
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* mii_check_gmii_support - check if the MII supports Gb interfaces
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* @mii: the MII interface
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*/
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int mii_check_gmii_support(struct mii_if_info *mii)
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{
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int reg;
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reg = mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
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if (reg & BMSR_ESTATEN) {
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reg = mii->mdio_read(mii->dev, mii->phy_id, MII_ESTATUS);
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if (reg & (ESTATUS_1000_TFULL | ESTATUS_1000_THALF))
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return 1;
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}
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return 0;
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}
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/**
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* mii_link_ok - is link status up/ok
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* @mii: the MII interface
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*
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* Returns 1 if the MII reports link status up/ok, 0 otherwise.
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*/
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int mii_link_ok (struct mii_if_info *mii)
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{
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/* first, a dummy read, needed to latch some MII phys */
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mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR);
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if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS)
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return 1;
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return 0;
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}
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/**
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* mii_nway_restart - restart NWay (autonegotiation) for this interface
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* @mii: the MII interface
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*
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| 261 |
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* Returns 0 on success, negative on error.
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*/
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int mii_nway_restart (struct mii_if_info *mii)
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| 264 |
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{
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int bmcr;
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int r = -EINVAL;
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| 267 |
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| 268 |
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/* if autoneg is off, it's an error */
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| 269 |
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bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);
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| 271 |
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if (bmcr & BMCR_ANENABLE) {
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| 272 |
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bmcr |= BMCR_ANRESTART;
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mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr);
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| 274 |
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r = 0;
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| 275 |
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}
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| 276 |
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| 277 |
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return r;
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| 278 |
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}
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| 279 |
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| 280 |
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/**
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| 281 |
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* mii_check_link - check MII link status
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| 282 |
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* @mii: MII interface
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| 283 |
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*
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| 284 |
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* If the link status changed (previous != current), call
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| 285 |
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* netif_carrier_on() if current link status is Up or call
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| 286 |
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* netif_carrier_off() if current link status is Down.
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| 287 |
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*/
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| 288 |
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void mii_check_link (struct mii_if_info *mii)
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| 289 |
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{
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| 290 |
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int cur_link = mii_link_ok(mii);
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| 291 |
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int prev_link = netif_carrier_ok(mii->dev);
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| 292 |
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| 293 |
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if (cur_link && !prev_link)
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| 294 |
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netif_carrier_on(mii->dev);
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| 295 |
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else if (prev_link && !cur_link)
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| 296 |
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netif_carrier_off(mii->dev);
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| 297 |
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}
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| 298 |
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| 299 |
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/**
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| 300 |
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* mii_check_media - check the MII interface for a duplex change
|
| 301 |
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* @mii: the MII interface
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| 302 |
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* @ok_to_print: OK to print link up/down messages
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| 303 |
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* @init_media: OK to save duplex mode in @mii
|
| 304 |
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*
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| 305 |
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* Returns 1 if the duplex mode changed, 0 if not.
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| 306 |
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* If the media type is forced, always returns 0.
|
| 307 |
|
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*/
|
| 308 |
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|
unsigned int mii_check_media (struct mii_if_info *mii,
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| 309 |
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unsigned int ok_to_print,
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| 310 |
|
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unsigned int init_media)
|
| 311 |
|
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{
|
| 312 |
|
|
unsigned int old_carrier, new_carrier;
|
| 313 |
|
|
int advertise, lpa, media, duplex;
|
| 314 |
|
|
int lpa2 = 0;
|
| 315 |
|
|
|
| 316 |
|
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/* if forced media, go no further */
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| 317 |
|
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if (mii->force_media)
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| 318 |
|
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return 0; /* duplex did not change */
|
| 319 |
|
|
|
| 320 |
|
|
/* check current and old link status */
|
| 321 |
|
|
old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
|
| 322 |
|
|
new_carrier = (unsigned int) mii_link_ok(mii);
|
| 323 |
|
|
|
| 324 |
|
|
/* if carrier state did not change, this is a "bounce",
|
| 325 |
|
|
* just exit as everything is already set correctly
|
| 326 |
|
|
*/
|
| 327 |
|
|
if ((!init_media) && (old_carrier == new_carrier))
|
| 328 |
|
|
return 0; /* duplex did not change */
|
| 329 |
|
|
|
| 330 |
|
|
/* no carrier, nothing much to do */
|
| 331 |
|
|
if (!new_carrier) {
|
| 332 |
|
|
netif_carrier_off(mii->dev);
|
| 333 |
|
|
if (ok_to_print)
|
| 334 |
|
|
printk(KERN_INFO "%s: link down\n", mii->dev->name);
|
| 335 |
|
|
return 0; /* duplex did not change */
|
| 336 |
|
|
}
|
| 337 |
|
|
|
| 338 |
|
|
/*
|
| 339 |
|
|
* we have carrier, see who's on the other end
|
| 340 |
|
|
*/
|
| 341 |
|
|
netif_carrier_on(mii->dev);
|
| 342 |
|
|
|
| 343 |
|
|
/* get MII advertise and LPA values */
|
| 344 |
|
|
if ((!init_media) && (mii->advertising))
|
| 345 |
|
|
advertise = mii->advertising;
|
| 346 |
|
|
else {
|
| 347 |
|
|
advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE);
|
| 348 |
|
|
mii->advertising = advertise;
|
| 349 |
|
|
}
|
| 350 |
|
|
lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
|
| 351 |
|
|
if (mii->supports_gmii)
|
| 352 |
|
|
lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
|
| 353 |
|
|
|
| 354 |
|
|
/* figure out media and duplex from advertise and LPA values */
|
| 355 |
|
|
media = mii_nway_result(lpa & advertise);
|
| 356 |
|
|
duplex = (media & ADVERTISE_FULL) ? 1 : 0;
|
| 357 |
|
|
if (lpa2 & LPA_1000FULL)
|
| 358 |
|
|
duplex = 1;
|
| 359 |
|
|
|
| 360 |
|
|
if (ok_to_print)
|
| 361 |
|
|
printk(KERN_INFO "%s: link up, %sMbps, %s-duplex, lpa 0x%04X\n",
|
| 362 |
|
|
mii->dev->name,
|
| 363 |
|
|
lpa2 & (LPA_1000FULL | LPA_1000HALF) ? "1000" :
|
| 364 |
|
|
media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? "100" : "10",
|
| 365 |
|
|
duplex ? "full" : "half",
|
| 366 |
|
|
lpa);
|
| 367 |
|
|
|
| 368 |
|
|
if ((init_media) || (mii->full_duplex != duplex)) {
|
| 369 |
|
|
mii->full_duplex = duplex;
|
| 370 |
|
|
return 1; /* duplex changed */
|
| 371 |
|
|
}
|
| 372 |
|
|
|
| 373 |
|
|
return 0; /* duplex did not change */
|
| 374 |
|
|
}
|
| 375 |
|
|
|
| 376 |
|
|
/**
|
| 377 |
|
|
* generic_mii_ioctl - main MII ioctl interface
|
| 378 |
|
|
* @mii_if: the MII interface
|
| 379 |
|
|
* @mii_data: MII ioctl data structure
|
| 380 |
|
|
* @cmd: MII ioctl command
|
| 381 |
|
|
* @duplex_chg_out: pointer to @duplex_changed status if there was no
|
| 382 |
|
|
* ioctl error
|
| 383 |
|
|
*
|
| 384 |
|
|
* Returns 0 on success, negative on error.
|
| 385 |
|
|
*/
|
| 386 |
|
|
int generic_mii_ioctl(struct mii_if_info *mii_if,
|
| 387 |
|
|
struct mii_ioctl_data *mii_data, int cmd,
|
| 388 |
|
|
unsigned int *duplex_chg_out)
|
| 389 |
|
|
{
|
| 390 |
|
|
int rc = 0;
|
| 391 |
|
|
unsigned int duplex_changed = 0;
|
| 392 |
|
|
|
| 393 |
|
|
if (duplex_chg_out)
|
| 394 |
|
|
*duplex_chg_out = 0;
|
| 395 |
|
|
|
| 396 |
|
|
mii_data->phy_id &= mii_if->phy_id_mask;
|
| 397 |
|
|
mii_data->reg_num &= mii_if->reg_num_mask;
|
| 398 |
|
|
|
| 399 |
|
|
switch(cmd) {
|
| 400 |
|
|
case SIOCGMIIPHY:
|
| 401 |
|
|
mii_data->phy_id = mii_if->phy_id;
|
| 402 |
|
|
/* fall through */
|
| 403 |
|
|
|
| 404 |
|
|
case SIOCGMIIREG:
|
| 405 |
|
|
mii_data->val_out =
|
| 406 |
|
|
mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
|
| 407 |
|
|
mii_data->reg_num);
|
| 408 |
|
|
break;
|
| 409 |
|
|
|
| 410 |
|
|
case SIOCSMIIREG: {
|
| 411 |
|
|
u16 val = mii_data->val_in;
|
| 412 |
|
|
|
| 413 |
|
|
if (!capable(CAP_NET_ADMIN))
|
| 414 |
|
|
return -EPERM;
|
| 415 |
|
|
|
| 416 |
|
|
if (mii_data->phy_id == mii_if->phy_id) {
|
| 417 |
|
|
switch(mii_data->reg_num) {
|
| 418 |
|
|
case MII_BMCR: {
|
| 419 |
|
|
unsigned int new_duplex = 0;
|
| 420 |
|
|
if (val & (BMCR_RESET|BMCR_ANENABLE))
|
| 421 |
|
|
mii_if->force_media = 0;
|
| 422 |
|
|
else
|
| 423 |
|
|
mii_if->force_media = 1;
|
| 424 |
|
|
if (mii_if->force_media &&
|
| 425 |
|
|
(val & BMCR_FULLDPLX))
|
| 426 |
|
|
new_duplex = 1;
|
| 427 |
|
|
if (mii_if->full_duplex != new_duplex) {
|
| 428 |
|
|
duplex_changed = 1;
|
| 429 |
|
|
mii_if->full_duplex = new_duplex;
|
| 430 |
|
|
}
|
| 431 |
|
|
break;
|
| 432 |
|
|
}
|
| 433 |
|
|
case MII_ADVERTISE:
|
| 434 |
|
|
mii_if->advertising = val;
|
| 435 |
|
|
break;
|
| 436 |
|
|
default:
|
| 437 |
|
|
/* do nothing */
|
| 438 |
|
|
break;
|
| 439 |
|
|
}
|
| 440 |
|
|
}
|
| 441 |
|
|
|
| 442 |
|
|
mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
|
| 443 |
|
|
mii_data->reg_num, val);
|
| 444 |
|
|
break;
|
| 445 |
|
|
}
|
| 446 |
|
|
|
| 447 |
|
|
default:
|
| 448 |
|
|
rc = -EOPNOTSUPP;
|
| 449 |
|
|
break;
|
| 450 |
|
|
}
|
| 451 |
|
|
|
| 452 |
|
|
if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
|
| 453 |
|
|
*duplex_chg_out = 1;
|
| 454 |
|
|
|
| 455 |
|
|
return rc;
|
| 456 |
|
|
}
|
| 457 |
|
|
|
| 458 |
|
|
MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
|
| 459 |
|
|
MODULE_DESCRIPTION ("MII hardware support library");
|
| 460 |
|
|
MODULE_LICENSE("GPL");
|
| 461 |
|
|
|
| 462 |
|
|
EXPORT_SYMBOL(mii_link_ok);
|
| 463 |
|
|
EXPORT_SYMBOL(mii_nway_restart);
|
| 464 |
|
|
EXPORT_SYMBOL(mii_ethtool_gset);
|
| 465 |
|
|
EXPORT_SYMBOL(mii_ethtool_sset);
|
| 466 |
|
|
EXPORT_SYMBOL(mii_check_link);
|
| 467 |
|
|
EXPORT_SYMBOL(mii_check_media);
|
| 468 |
|
|
EXPORT_SYMBOL(mii_check_gmii_support);
|
| 469 |
|
|
EXPORT_SYMBOL(generic_mii_ioctl);
|
| 470 |
|
|
|
