502 lines
13 KiB
C
502 lines
13 KiB
C
/*
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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/mdio.h>
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static u32 mii_get_an(struct mii_if_info *mii, u16 addr)
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{
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u32 result = 0;
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int advert;
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advert = mii->mdio_read(mii->dev, mii->phy_id, addr);
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if (advert & LPA_LPACK)
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result |= ADVERTISED_Autoneg;
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if (advert & ADVERTISE_10HALF)
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result |= ADVERTISED_10baseT_Half;
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if (advert & ADVERTISE_10FULL)
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result |= ADVERTISED_10baseT_Full;
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if (advert & ADVERTISE_100HALF)
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result |= ADVERTISED_100baseT_Half;
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if (advert & ADVERTISE_100FULL)
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result |= ADVERTISED_100baseT_Full;
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if (advert & ADVERTISE_PAUSE_CAP)
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result |= ADVERTISED_Pause;
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if (advert & ADVERTISE_PAUSE_ASYM)
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result |= ADVERTISED_Asym_Pause;
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return result;
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}
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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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* The @ecmd parameter is expected to have been cleared before calling
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* mii_ethtool_gset().
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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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u16 bmcr, bmsr, ctrl1000 = 0, stat1000 = 0;
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u32 nego;
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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->mdio_support = MDIO_SUPPORTS_C22;
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ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII;
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bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR);
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bmsr = mii->mdio_read(dev, mii->phy_id, MII_BMSR);
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if (mii->supports_gmii) {
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ctrl1000 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000);
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stat1000 = 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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ecmd->advertising |= mii_get_an(mii, MII_ADVERTISE);
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if (ctrl1000 & ADVERTISE_1000HALF)
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ecmd->advertising |= ADVERTISED_1000baseT_Half;
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if (ctrl1000 & ADVERTISE_1000FULL)
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ecmd->advertising |= ADVERTISED_1000baseT_Full;
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if (bmsr & BMSR_ANEGCOMPLETE) {
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ecmd->lp_advertising = mii_get_an(mii, MII_LPA);
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if (stat1000 & LPA_1000HALF)
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ecmd->lp_advertising |=
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ADVERTISED_1000baseT_Half;
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if (stat1000 & LPA_1000FULL)
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ecmd->lp_advertising |=
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ADVERTISED_1000baseT_Full;
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} else {
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ecmd->lp_advertising = 0;
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}
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nego = ecmd->advertising & ecmd->lp_advertising;
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if (nego & (ADVERTISED_1000baseT_Full |
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ADVERTISED_1000baseT_Half)) {
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ethtool_cmd_speed_set(ecmd, SPEED_1000);
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ecmd->duplex = !!(nego & ADVERTISED_1000baseT_Full);
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} else if (nego & (ADVERTISED_100baseT_Full |
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ADVERTISED_100baseT_Half)) {
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ethtool_cmd_speed_set(ecmd, SPEED_100);
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ecmd->duplex = !!(nego & ADVERTISED_100baseT_Full);
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} else {
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ethtool_cmd_speed_set(ecmd, SPEED_10);
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ecmd->duplex = !!(nego & ADVERTISED_10baseT_Full);
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}
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} else {
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ecmd->autoneg = AUTONEG_DISABLE;
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ethtool_cmd_speed_set(ecmd,
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((bmcr & BMCR_SPEED1000 &&
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(bmcr & BMCR_SPEED100) == 0) ?
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SPEED_1000 :
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((bmcr & BMCR_SPEED100) ?
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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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mii->full_duplex = ecmd->duplex;
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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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u32 speed = ethtool_cmd_speed(ecmd);
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if (speed != SPEED_10 &&
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speed != SPEED_100 &&
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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 ((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 (speed == SPEED_1000)
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tmp |= BMCR_SPEED1000;
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else if (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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* 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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{
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int bmcr;
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int r = -EINVAL;
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/* if autoneg is off, it's an error */
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bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR);
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if (bmcr & BMCR_ANENABLE) {
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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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r = 0;
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}
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return r;
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}
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/**
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* mii_check_link - check MII link status
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* @mii: MII interface
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*
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* If the link status changed (previous != current), call
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* netif_carrier_on() if current link status is Up or call
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* netif_carrier_off() if current link status is Down.
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*/
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void mii_check_link (struct mii_if_info *mii)
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{
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int cur_link = mii_link_ok(mii);
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int prev_link = netif_carrier_ok(mii->dev);
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if (cur_link && !prev_link)
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netif_carrier_on(mii->dev);
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else if (prev_link && !cur_link)
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netif_carrier_off(mii->dev);
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}
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/**
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* mii_check_media - check the MII interface for a duplex change
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* @mii: the MII interface
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* @ok_to_print: OK to print link up/down messages
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* @init_media: OK to save duplex mode in @mii
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*
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* Returns 1 if the duplex mode changed, 0 if not.
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* If the media type is forced, always returns 0.
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*/
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unsigned int mii_check_media (struct mii_if_info *mii,
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unsigned int ok_to_print,
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unsigned int init_media)
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{
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unsigned int old_carrier, new_carrier;
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int advertise, lpa, media, duplex;
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int lpa2 = 0;
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/* if forced media, go no further */
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if (mii->force_media)
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return 0; /* duplex did not change */
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/* check current and old link status */
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old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0;
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new_carrier = (unsigned int) mii_link_ok(mii);
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/* if carrier state did not change, this is a "bounce",
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* just exit as everything is already set correctly
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*/
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if ((!init_media) && (old_carrier == new_carrier))
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return 0; /* duplex did not change */
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/* no carrier, nothing much to do */
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if (!new_carrier) {
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netif_carrier_off(mii->dev);
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if (ok_to_print)
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netdev_info(mii->dev, "link down\n");
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return 0; /* duplex did not change */
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}
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/*
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* we have carrier, see who's on the other end
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*/
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netif_carrier_on(mii->dev);
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/* get MII advertise and LPA values */
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if ((!init_media) && (mii->advertising))
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advertise = mii->advertising;
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else {
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advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE);
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mii->advertising = advertise;
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}
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lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA);
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if (mii->supports_gmii)
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lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000);
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/* figure out media and duplex from advertise and LPA values */
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media = mii_nway_result(lpa & advertise);
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duplex = (media & ADVERTISE_FULL) ? 1 : 0;
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if (lpa2 & LPA_1000FULL)
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duplex = 1;
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if (ok_to_print)
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netdev_info(mii->dev, "link up, %uMbps, %s-duplex, lpa 0x%04X\n",
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lpa2 & (LPA_1000FULL | LPA_1000HALF) ? 1000 :
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media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ?
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100 : 10,
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duplex ? "full" : "half",
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lpa);
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if ((init_media) || (mii->full_duplex != duplex)) {
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mii->full_duplex = duplex;
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return 1; /* duplex changed */
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}
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return 0; /* duplex did not change */
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}
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/**
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* generic_mii_ioctl - main MII ioctl interface
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* @mii_if: the MII interface
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* @mii_data: MII ioctl data structure
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* @cmd: MII ioctl command
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* @duplex_chg_out: pointer to @duplex_changed status if there was no
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* ioctl error
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*
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* Returns 0 on success, negative on error.
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*/
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int generic_mii_ioctl(struct mii_if_info *mii_if,
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struct mii_ioctl_data *mii_data, int cmd,
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unsigned int *duplex_chg_out)
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{
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int rc = 0;
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unsigned int duplex_changed = 0;
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if (duplex_chg_out)
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*duplex_chg_out = 0;
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mii_data->phy_id &= mii_if->phy_id_mask;
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mii_data->reg_num &= mii_if->reg_num_mask;
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switch(cmd) {
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case SIOCGMIIPHY:
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mii_data->phy_id = mii_if->phy_id;
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/* fall through */
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case SIOCGMIIREG:
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mii_data->val_out =
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mii_if->mdio_read(mii_if->dev, mii_data->phy_id,
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mii_data->reg_num);
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break;
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case SIOCSMIIREG: {
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u16 val = mii_data->val_in;
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if (mii_data->phy_id == mii_if->phy_id) {
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switch(mii_data->reg_num) {
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case MII_BMCR: {
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unsigned int new_duplex = 0;
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if (val & (BMCR_RESET|BMCR_ANENABLE))
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mii_if->force_media = 0;
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else
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mii_if->force_media = 1;
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if (mii_if->force_media &&
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(val & BMCR_FULLDPLX))
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new_duplex = 1;
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if (mii_if->full_duplex != new_duplex) {
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duplex_changed = 1;
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mii_if->full_duplex = new_duplex;
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}
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break;
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}
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case MII_ADVERTISE:
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mii_if->advertising = val;
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break;
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default:
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/* do nothing */
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break;
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}
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}
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mii_if->mdio_write(mii_if->dev, mii_data->phy_id,
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mii_data->reg_num, val);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
rc = -EOPNOTSUPP;
|
|
break;
|
|
}
|
|
|
|
if ((rc == 0) && (duplex_chg_out) && (duplex_changed))
|
|
*duplex_chg_out = 1;
|
|
|
|
return rc;
|
|
}
|
|
|
|
MODULE_AUTHOR ("Jeff Garzik <jgarzik@pobox.com>");
|
|
MODULE_DESCRIPTION ("MII hardware support library");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
EXPORT_SYMBOL(mii_link_ok);
|
|
EXPORT_SYMBOL(mii_nway_restart);
|
|
EXPORT_SYMBOL(mii_ethtool_gset);
|
|
EXPORT_SYMBOL(mii_ethtool_sset);
|
|
EXPORT_SYMBOL(mii_check_link);
|
|
EXPORT_SYMBOL(mii_check_media);
|
|
EXPORT_SYMBOL(mii_check_gmii_support);
|
|
EXPORT_SYMBOL(generic_mii_ioctl);
|
|
|