diff options
Diffstat (limited to 'drivers/net/mii.c')
| -rw-r--r-- | drivers/net/mii.c | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/drivers/net/mii.c b/drivers/net/mii.c new file mode 100644 index 000000000000..c33cb3dc942b --- /dev/null +++ b/drivers/net/mii.c @@ -0,0 +1,398 @@ +/* + + mii.c: MII interface library + + Maintained by Jeff Garzik <jgarzik@pobox.com> + Copyright 2001,2002 Jeff Garzik + + Various code came from myson803.c and other files by + Donald Becker. Copyright: + + Written 1998-2002 by Donald Becker. + + This software may be used and distributed according + to the terms of the GNU General Public License (GPL), + incorporated herein by reference. Drivers based on + or derived from this code fall under the GPL and must + retain the authorship, copyright and license notice. + This file is not a complete program and may only be + used when the entire operating system is licensed + under the GPL. + + The author may be reached as becker@scyld.com, or C/O + Scyld Computing Corporation + 410 Severn Ave., Suite 210 + Annapolis MD 21403 + + + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/netdevice.h> +#include <linux/ethtool.h> +#include <linux/mii.h> + +int mii_ethtool_gset(struct mii_if_info *mii, struct ethtool_cmd *ecmd) +{ + struct net_device *dev = mii->dev; + u32 advert, bmcr, lpa, nego; + u32 advert2 = 0, bmcr2 = 0, lpa2 = 0; + + ecmd->supported = + (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | + SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | + SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII); + if (mii->supports_gmii) + ecmd->supported |= SUPPORTED_1000baseT_Half | + SUPPORTED_1000baseT_Full; + + /* only supports twisted-pair */ + ecmd->port = PORT_MII; + + /* only supports internal transceiver */ + ecmd->transceiver = XCVR_INTERNAL; + + /* this isn't fully supported at higher layers */ + ecmd->phy_address = mii->phy_id; + + ecmd->advertising = ADVERTISED_TP | ADVERTISED_MII; + advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE); + if (mii->supports_gmii) + advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000); + + if (advert & ADVERTISE_10HALF) + ecmd->advertising |= ADVERTISED_10baseT_Half; + if (advert & ADVERTISE_10FULL) + ecmd->advertising |= ADVERTISED_10baseT_Full; + if (advert & ADVERTISE_100HALF) + ecmd->advertising |= ADVERTISED_100baseT_Half; + if (advert & ADVERTISE_100FULL) + ecmd->advertising |= ADVERTISED_100baseT_Full; + if (advert2 & ADVERTISE_1000HALF) + ecmd->advertising |= ADVERTISED_1000baseT_Half; + if (advert2 & ADVERTISE_1000FULL) + ecmd->advertising |= ADVERTISED_1000baseT_Full; + + bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR); + lpa = mii->mdio_read(dev, mii->phy_id, MII_LPA); + if (mii->supports_gmii) { + bmcr2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000); + lpa2 = mii->mdio_read(dev, mii->phy_id, MII_STAT1000); + } + if (bmcr & BMCR_ANENABLE) { + ecmd->advertising |= ADVERTISED_Autoneg; + ecmd->autoneg = AUTONEG_ENABLE; + + nego = mii_nway_result(advert & lpa); + if ((bmcr2 & (ADVERTISE_1000HALF | ADVERTISE_1000FULL)) & + (lpa2 >> 2)) + ecmd->speed = SPEED_1000; + else if (nego == LPA_100FULL || nego == LPA_100HALF) + ecmd->speed = SPEED_100; + else + ecmd->speed = SPEED_10; + if ((lpa2 & LPA_1000FULL) || nego == LPA_100FULL || + nego == LPA_10FULL) { + ecmd->duplex = DUPLEX_FULL; + mii->full_duplex = 1; + } else { + ecmd->duplex = DUPLEX_HALF; + mii->full_duplex = 0; + } + } else { + ecmd->autoneg = AUTONEG_DISABLE; + + ecmd->speed = ((bmcr & BMCR_SPEED1000 && + (bmcr & BMCR_SPEED100) == 0) ? SPEED_1000 : + (bmcr & BMCR_SPEED100) ? SPEED_100 : SPEED_10); + ecmd->duplex = (bmcr & BMCR_FULLDPLX) ? DUPLEX_FULL : DUPLEX_HALF; + } + + /* ignore maxtxpkt, maxrxpkt for now */ + + return 0; +} + +int mii_ethtool_sset(struct mii_if_info *mii, struct ethtool_cmd *ecmd) +{ + struct net_device *dev = mii->dev; + + if (ecmd->speed != SPEED_10 && + ecmd->speed != SPEED_100 && + ecmd->speed != SPEED_1000) + return -EINVAL; + if (ecmd->duplex != DUPLEX_HALF && ecmd->duplex != DUPLEX_FULL) + return -EINVAL; + if (ecmd->port != PORT_MII) + return -EINVAL; + if (ecmd->transceiver != XCVR_INTERNAL) + return -EINVAL; + if (ecmd->phy_address != mii->phy_id) + return -EINVAL; + if (ecmd->autoneg != AUTONEG_DISABLE && ecmd->autoneg != AUTONEG_ENABLE) + return -EINVAL; + if ((ecmd->speed == SPEED_1000) && (!mii->supports_gmii)) + return -EINVAL; + + /* ignore supported, maxtxpkt, maxrxpkt */ + + if (ecmd->autoneg == AUTONEG_ENABLE) { + u32 bmcr, advert, tmp; + u32 advert2 = 0, tmp2 = 0; + + if ((ecmd->advertising & (ADVERTISED_10baseT_Half | + ADVERTISED_10baseT_Full | + ADVERTISED_100baseT_Half | + ADVERTISED_100baseT_Full | + ADVERTISED_1000baseT_Half | + ADVERTISED_1000baseT_Full)) == 0) + return -EINVAL; + + /* advertise only what has been requested */ + advert = mii->mdio_read(dev, mii->phy_id, MII_ADVERTISE); + tmp = advert & ~(ADVERTISE_ALL | ADVERTISE_100BASE4); + if (mii->supports_gmii) { + advert2 = mii->mdio_read(dev, mii->phy_id, MII_CTRL1000); + tmp2 = advert2 & ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL); + } + if (ecmd->advertising & ADVERTISED_10baseT_Half) + tmp |= ADVERTISE_10HALF; + if (ecmd->advertising & ADVERTISED_10baseT_Full) + tmp |= ADVERTISE_10FULL; + if (ecmd->advertising & ADVERTISED_100baseT_Half) + tmp |= ADVERTISE_100HALF; + if (ecmd->advertising & ADVERTISED_100baseT_Full) + tmp |= ADVERTISE_100FULL; + if (mii->supports_gmii) { + if (ecmd->advertising & ADVERTISED_1000baseT_Half) + tmp2 |= ADVERTISE_1000HALF; + if (ecmd->advertising & ADVERTISED_1000baseT_Full) + tmp2 |= ADVERTISE_1000FULL; + } + if (advert != tmp) { + mii->mdio_write(dev, mii->phy_id, MII_ADVERTISE, tmp); + mii->advertising = tmp; + } + if ((mii->supports_gmii) && (advert2 != tmp2)) + mii->mdio_write(dev, mii->phy_id, MII_CTRL1000, tmp2); + + /* turn on autonegotiation, and force a renegotiate */ + bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR); + bmcr |= (BMCR_ANENABLE | BMCR_ANRESTART); + mii->mdio_write(dev, mii->phy_id, MII_BMCR, bmcr); + + mii->force_media = 0; + } else { + u32 bmcr, tmp; + + /* turn off auto negotiation, set speed and duplexity */ + bmcr = mii->mdio_read(dev, mii->phy_id, MII_BMCR); + tmp = bmcr & ~(BMCR_ANENABLE | BMCR_SPEED100 | + BMCR_SPEED1000 | BMCR_FULLDPLX); + if (ecmd->speed == SPEED_1000) + tmp |= BMCR_SPEED1000; + else if (ecmd->speed == SPEED_100) + tmp |= BMCR_SPEED100; + if (ecmd->duplex == DUPLEX_FULL) { + tmp |= BMCR_FULLDPLX; + mii->full_duplex = 1; + } else + mii->full_duplex = 0; + if (bmcr != tmp) + mii->mdio_write(dev, mii->phy_id, MII_BMCR, tmp); + + mii->force_media = 1; + } + return 0; +} + +int mii_link_ok (struct mii_if_info *mii) +{ + /* first, a dummy read, needed to latch some MII phys */ + mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR); + if (mii->mdio_read(mii->dev, mii->phy_id, MII_BMSR) & BMSR_LSTATUS) + return 1; + return 0; +} + +int mii_nway_restart (struct mii_if_info *mii) +{ + int bmcr; + int r = -EINVAL; + + /* if autoneg is off, it's an error */ + bmcr = mii->mdio_read(mii->dev, mii->phy_id, MII_BMCR); + + if (bmcr & BMCR_ANENABLE) { + bmcr |= BMCR_ANRESTART; + mii->mdio_write(mii->dev, mii->phy_id, MII_BMCR, bmcr); + r = 0; + } + + return r; +} + +void mii_check_link (struct mii_if_info *mii) +{ + int cur_link = mii_link_ok(mii); + int prev_link = netif_carrier_ok(mii->dev); + + if (cur_link && !prev_link) + netif_carrier_on(mii->dev); + else if (prev_link && !cur_link) + netif_carrier_off(mii->dev); +} + +unsigned int mii_check_media (struct mii_if_info *mii, + unsigned int ok_to_print, + unsigned int init_media) +{ + unsigned int old_carrier, new_carrier; + int advertise, lpa, media, duplex; + int lpa2 = 0; + + /* if forced media, go no further */ + if (mii->force_media) + return 0; /* duplex did not change */ + + /* check current and old link status */ + old_carrier = netif_carrier_ok(mii->dev) ? 1 : 0; + new_carrier = (unsigned int) mii_link_ok(mii); + + /* if carrier state did not change, this is a "bounce", + * just exit as everything is already set correctly + */ + if ((!init_media) && (old_carrier == new_carrier)) + return 0; /* duplex did not change */ + + /* no carrier, nothing much to do */ + if (!new_carrier) { + netif_carrier_off(mii->dev); + if (ok_to_print) + printk(KERN_INFO "%s: link down\n", mii->dev->name); + return 0; /* duplex did not change */ + } + + /* + * we have carrier, see who's on the other end + */ + netif_carrier_on(mii->dev); + + /* get MII advertise and LPA values */ + if ((!init_media) && (mii->advertising)) + advertise = mii->advertising; + else { + advertise = mii->mdio_read(mii->dev, mii->phy_id, MII_ADVERTISE); + mii->advertising = advertise; + } + lpa = mii->mdio_read(mii->dev, mii->phy_id, MII_LPA); + if (mii->supports_gmii) + lpa2 = mii->mdio_read(mii->dev, mii->phy_id, MII_STAT1000); + + /* figure out media and duplex from advertise and LPA values */ + media = mii_nway_result(lpa & advertise); + duplex = (media & ADVERTISE_FULL) ? 1 : 0; + if (lpa2 & LPA_1000FULL) + duplex = 1; + + if (ok_to_print) + printk(KERN_INFO "%s: link up, %sMbps, %s-duplex, lpa 0x%04X\n", + mii->dev->name, + lpa2 & (LPA_1000FULL | LPA_1000HALF) ? "1000" : + media & (ADVERTISE_100FULL | ADVERTISE_100HALF) ? "100" : "10", + duplex ? "full" : "half", + lpa); + + if ((init_media) || (mii->full_duplex != duplex)) { + mii->full_duplex = duplex; + return 1; /* duplex changed */ + } + + return 0; /* duplex did not change */ +} + +int generic_mii_ioctl(struct mii_if_info *mii_if, + struct mii_ioctl_data *mii_data, int cmd, + unsigned int *duplex_chg_out) +{ + int rc = 0; + unsigned int duplex_changed = 0; + + if (duplex_chg_out) + *duplex_chg_out = 0; + + mii_data->phy_id &= mii_if->phy_id_mask; + mii_data->reg_num &= mii_if->reg_num_mask; + + switch(cmd) { + case SIOCGMIIPHY: + mii_data->phy_id = mii_if->phy_id; + /* fall through */ + + case SIOCGMIIREG: + mii_data->val_out = + mii_if->mdio_read(mii_if->dev, mii_data->phy_id, + mii_data->reg_num); + break; + + case SIOCSMIIREG: { + u16 val = mii_data->val_in; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + if (mii_data->phy_id == mii_if->phy_id) { + switch(mii_data->reg_num) { + case MII_BMCR: { + unsigned int new_duplex = 0; + if (val & (BMCR_RESET|BMCR_ANENABLE)) + mii_if->force_media = 0; + else + mii_if->force_media = 1; + if (mii_if->force_media && + (val & BMCR_FULLDPLX)) + new_duplex = 1; + if (mii_if->full_duplex != new_duplex) { + duplex_changed = 1; + mii_if->full_duplex = new_duplex; + } + break; + } + case MII_ADVERTISE: + mii_if->advertising = val; + break; + default: + /* do nothing */ + break; + } + } + + mii_if->mdio_write(mii_if->dev, mii_data->phy_id, + 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(generic_mii_ioctl); + |