759 lines
17 KiB
C
759 lines
17 KiB
C
/*
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* Generic PHY Management code
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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*
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* Copyright 2011 Freescale Semiconductor, Inc.
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* author Andy Fleming
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*
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* Based loosely off of Linux's PHY Lib
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*/
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#include <config.h>
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#include <common.h>
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#include <malloc.h>
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#include <net.h>
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#include <command.h>
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#include <miiphy.h>
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#include <phy.h>
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#include <errno.h>
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/* Generic PHY support and helper functions */
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/**
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* genphy_config_advert - sanitize and advertise auto-negotation parameters
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* @phydev: target phy_device struct
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*
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* Description: Writes MII_ADVERTISE with the appropriate values,
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* after sanitizing the values to make sure we only advertise
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* what is supported. Returns < 0 on error, 0 if the PHY's advertisement
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* hasn't changed, and > 0 if it has changed.
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*/
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int genphy_config_advert(struct phy_device *phydev)
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{
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u32 advertise;
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int oldadv, adv;
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int err, changed = 0;
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/* Only allow advertising what
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* this PHY supports */
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phydev->advertising &= phydev->supported;
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advertise = phydev->advertising;
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/* Setup standard advertisement */
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oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
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if (adv < 0)
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return adv;
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adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
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ADVERTISE_PAUSE_ASYM);
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if (advertise & ADVERTISED_10baseT_Half)
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adv |= ADVERTISE_10HALF;
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if (advertise & ADVERTISED_10baseT_Full)
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adv |= ADVERTISE_10FULL;
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if (advertise & ADVERTISED_100baseT_Half)
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adv |= ADVERTISE_100HALF;
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if (advertise & ADVERTISED_100baseT_Full)
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adv |= ADVERTISE_100FULL;
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if (advertise & ADVERTISED_Pause)
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adv |= ADVERTISE_PAUSE_CAP;
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if (advertise & ADVERTISED_Asym_Pause)
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adv |= ADVERTISE_PAUSE_ASYM;
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if (adv != oldadv) {
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err = phy_write(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE, adv);
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if (err < 0)
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return err;
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changed = 1;
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}
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/* Configure gigabit if it's supported */
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if (phydev->supported & (SUPPORTED_1000baseT_Half |
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SUPPORTED_1000baseT_Full)) {
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oldadv = adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_CTRL1000);
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if (adv < 0)
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return adv;
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adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
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if (advertise & SUPPORTED_1000baseT_Half)
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adv |= ADVERTISE_1000HALF;
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if (advertise & SUPPORTED_1000baseT_Full)
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adv |= ADVERTISE_1000FULL;
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if (adv != oldadv) {
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err = phy_write(phydev, MDIO_DEVAD_NONE, MII_CTRL1000,
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adv);
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if (err < 0)
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return err;
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changed = 1;
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}
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}
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return changed;
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}
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/**
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* genphy_setup_forced - configures/forces speed/duplex from @phydev
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* @phydev: target phy_device struct
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*
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* Description: Configures MII_BMCR to force speed/duplex
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* to the values in phydev. Assumes that the values are valid.
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*/
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int genphy_setup_forced(struct phy_device *phydev)
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{
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int err;
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int ctl = 0;
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phydev->pause = phydev->asym_pause = 0;
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if (SPEED_1000 == phydev->speed)
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ctl |= BMCR_SPEED1000;
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else if (SPEED_100 == phydev->speed)
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ctl |= BMCR_SPEED100;
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if (DUPLEX_FULL == phydev->duplex)
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ctl |= BMCR_FULLDPLX;
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err = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
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return err;
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}
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/**
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* genphy_restart_aneg - Enable and Restart Autonegotiation
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* @phydev: target phy_device struct
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*/
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int genphy_restart_aneg(struct phy_device *phydev)
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{
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int ctl;
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ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
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if (ctl < 0)
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return ctl;
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ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
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/* Don't isolate the PHY if we're negotiating */
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ctl &= ~(BMCR_ISOLATE);
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ctl = phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, ctl);
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return ctl;
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}
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/**
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* genphy_config_aneg - restart auto-negotiation or write BMCR
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* @phydev: target phy_device struct
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*
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* Description: If auto-negotiation is enabled, we configure the
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* advertising, and then restart auto-negotiation. If it is not
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* enabled, then we write the BMCR.
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*/
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int genphy_config_aneg(struct phy_device *phydev)
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{
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int result;
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if (AUTONEG_ENABLE != phydev->autoneg)
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return genphy_setup_forced(phydev);
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result = genphy_config_advert(phydev);
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if (result < 0) /* error */
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return result;
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if (result == 0) {
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/* Advertisment hasn't changed, but maybe aneg was never on to
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* begin with? Or maybe phy was isolated? */
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int ctl = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
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if (ctl < 0)
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return ctl;
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if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE))
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result = 1; /* do restart aneg */
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}
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/* Only restart aneg if we are advertising something different
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* than we were before. */
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if (result > 0)
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result = genphy_restart_aneg(phydev);
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return result;
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}
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/**
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* genphy_update_link - update link status in @phydev
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* @phydev: target phy_device struct
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*
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* Description: Update the value in phydev->link to reflect the
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* current link value. In order to do this, we need to read
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* the status register twice, keeping the second value.
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*/
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int genphy_update_link(struct phy_device *phydev)
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{
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unsigned int mii_reg;
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/*
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* Wait if the link is up, and autonegotiation is in progress
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* (ie - we're capable and it's not done)
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*/
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mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
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/*
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* If we already saw the link up, and it hasn't gone down, then
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* we don't need to wait for autoneg again
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*/
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if (phydev->link && mii_reg & BMSR_LSTATUS)
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return 0;
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if ((mii_reg & BMSR_ANEGCAPABLE) && !(mii_reg & BMSR_ANEGCOMPLETE)) {
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int i = 0;
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printf("%s Waiting for PHY auto negotiation to complete",
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phydev->dev->name);
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while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
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/*
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* Timeout reached ?
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*/
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if (i > PHY_ANEG_TIMEOUT) {
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printf(" TIMEOUT !\n");
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phydev->link = 0;
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return 0;
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}
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if (ctrlc()) {
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puts("user interrupt!\n");
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phydev->link = 0;
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return -EINTR;
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}
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if ((i++ % 500) == 0)
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printf(".");
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udelay(1000); /* 1 ms */
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mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
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}
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printf(" done\n");
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phydev->link = 1;
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} else {
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/* Read the link a second time to clear the latched state */
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mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
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if (mii_reg & BMSR_LSTATUS)
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phydev->link = 1;
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else
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phydev->link = 0;
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}
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return 0;
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}
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/*
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* Generic function which updates the speed and duplex. If
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* autonegotiation is enabled, it uses the AND of the link
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* partner's advertised capabilities and our advertised
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* capabilities. If autonegotiation is disabled, we use the
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* appropriate bits in the control register.
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*
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* Stolen from Linux's mii.c and phy_device.c
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*/
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static int genphy_parse_link(struct phy_device *phydev)
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{
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int mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
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/* We're using autonegotiation */
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if (mii_reg & BMSR_ANEGCAPABLE) {
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u32 lpa = 0;
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u32 gblpa = 0;
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/* Check for gigabit capability */
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if (mii_reg & BMSR_ERCAP) {
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/* We want a list of states supported by
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* both PHYs in the link
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*/
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gblpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_STAT1000);
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gblpa &= phy_read(phydev,
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MDIO_DEVAD_NONE, MII_CTRL1000) << 2;
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}
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/* Set the baseline so we only have to set them
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* if they're different
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*/
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phydev->speed = SPEED_10;
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phydev->duplex = DUPLEX_HALF;
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/* Check the gigabit fields */
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if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) {
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phydev->speed = SPEED_1000;
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if (gblpa & PHY_1000BTSR_1000FD)
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phydev->duplex = DUPLEX_FULL;
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/* We're done! */
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return 0;
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}
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lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
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lpa &= phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
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if (lpa & (LPA_100FULL | LPA_100HALF)) {
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phydev->speed = SPEED_100;
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if (lpa & LPA_100FULL)
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phydev->duplex = DUPLEX_FULL;
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} else if (lpa & LPA_10FULL)
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phydev->duplex = DUPLEX_FULL;
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} else {
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u32 bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
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phydev->speed = SPEED_10;
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phydev->duplex = DUPLEX_HALF;
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if (bmcr & BMCR_FULLDPLX)
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phydev->duplex = DUPLEX_FULL;
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if (bmcr & BMCR_SPEED1000)
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phydev->speed = SPEED_1000;
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else if (bmcr & BMCR_SPEED100)
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phydev->speed = SPEED_100;
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}
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return 0;
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}
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int genphy_config(struct phy_device *phydev)
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{
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int val;
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u32 features;
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/* For now, I'll claim that the generic driver supports
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* all possible port types */
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features = (SUPPORTED_TP | SUPPORTED_MII
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| SUPPORTED_AUI | SUPPORTED_FIBRE |
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SUPPORTED_BNC);
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/* Do we support autonegotiation? */
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val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
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if (val < 0)
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return val;
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if (val & BMSR_ANEGCAPABLE)
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features |= SUPPORTED_Autoneg;
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if (val & BMSR_100FULL)
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features |= SUPPORTED_100baseT_Full;
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if (val & BMSR_100HALF)
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features |= SUPPORTED_100baseT_Half;
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if (val & BMSR_10FULL)
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features |= SUPPORTED_10baseT_Full;
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if (val & BMSR_10HALF)
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features |= SUPPORTED_10baseT_Half;
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if (val & BMSR_ESTATEN) {
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val = phy_read(phydev, MDIO_DEVAD_NONE, MII_ESTATUS);
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if (val < 0)
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return val;
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if (val & ESTATUS_1000_TFULL)
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features |= SUPPORTED_1000baseT_Full;
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if (val & ESTATUS_1000_THALF)
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features |= SUPPORTED_1000baseT_Half;
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}
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phydev->supported = features;
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phydev->advertising = features;
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genphy_config_aneg(phydev);
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return 0;
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}
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int genphy_startup(struct phy_device *phydev)
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{
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genphy_update_link(phydev);
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genphy_parse_link(phydev);
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return 0;
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}
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int genphy_shutdown(struct phy_device *phydev)
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{
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return 0;
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}
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static struct phy_driver genphy_driver = {
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.uid = 0xffffffff,
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.mask = 0xffffffff,
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.name = "Generic PHY",
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.features = 0,
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.config = genphy_config,
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.startup = genphy_startup,
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.shutdown = genphy_shutdown,
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};
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static LIST_HEAD(phy_drivers);
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int phy_init(void)
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{
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#ifdef CONFIG_PHY_ATHEROS
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phy_atheros_init();
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#endif
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#ifdef CONFIG_PHY_BROADCOM
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phy_broadcom_init();
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#endif
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#ifdef CONFIG_PHY_DAVICOM
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phy_davicom_init();
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#endif
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#ifdef CONFIG_PHY_LXT
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phy_lxt_init();
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#endif
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#ifdef CONFIG_PHY_MARVELL
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phy_marvell_init();
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#endif
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#ifdef CONFIG_PHY_MICREL
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phy_micrel_init();
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#endif
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#ifdef CONFIG_PHY_NATSEMI
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phy_natsemi_init();
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#endif
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#ifdef CONFIG_PHY_REALTEK
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phy_realtek_init();
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#endif
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#ifdef CONFIG_PHY_SMSC
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phy_smsc_init();
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#endif
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#ifdef CONFIG_PHY_TERANETICS
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phy_teranetics_init();
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#endif
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#ifdef CONFIG_PHY_VITESSE
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phy_vitesse_init();
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#endif
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return 0;
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}
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int phy_register(struct phy_driver *drv)
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{
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INIT_LIST_HEAD(&drv->list);
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list_add_tail(&drv->list, &phy_drivers);
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return 0;
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}
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int phy_probe(struct phy_device *phydev)
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{
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int err = 0;
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phydev->advertising = phydev->supported = phydev->drv->features;
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phydev->mmds = phydev->drv->mmds;
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if (phydev->drv->probe)
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err = phydev->drv->probe(phydev);
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return err;
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}
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static struct phy_driver *generic_for_interface(phy_interface_t interface)
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{
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#ifdef CONFIG_PHYLIB_10G
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if (is_10g_interface(interface))
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return &gen10g_driver;
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#endif
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return &genphy_driver;
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}
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struct phy_driver *get_phy_driver(struct phy_device *phydev,
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phy_interface_t interface)
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{
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struct list_head *entry;
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int phy_id = phydev->phy_id;
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struct phy_driver *drv = NULL;
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list_for_each(entry, &phy_drivers) {
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drv = list_entry(entry, struct phy_driver, list);
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if ((drv->uid & drv->mask) == (phy_id & drv->mask))
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return drv;
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}
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/* If we made it here, there's no driver for this PHY */
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return generic_for_interface(interface);
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}
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struct phy_device *phy_device_create(struct mii_dev *bus, int addr, int phy_id,
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phy_interface_t interface)
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{
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struct phy_device *dev;
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/* We allocate the device, and initialize the
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* default values */
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dev = malloc(sizeof(*dev));
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if (!dev) {
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printf("Failed to allocate PHY device for %s:%d\n",
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bus->name, addr);
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return NULL;
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}
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memset(dev, 0, sizeof(*dev));
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dev->duplex = -1;
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dev->link = 1;
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dev->interface = interface;
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dev->autoneg = AUTONEG_ENABLE;
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dev->addr = addr;
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dev->phy_id = phy_id;
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dev->bus = bus;
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dev->drv = get_phy_driver(dev, interface);
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phy_probe(dev);
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bus->phymap[addr] = dev;
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return dev;
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}
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/**
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* get_phy_id - reads the specified addr for its ID.
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* @bus: the target MII bus
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* @addr: PHY address on the MII bus
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* @phy_id: where to store the ID retrieved.
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*
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* Description: Reads the ID registers of the PHY at @addr on the
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* @bus, stores it in @phy_id and returns zero on success.
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*/
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int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id)
|
|
{
|
|
int phy_reg;
|
|
|
|
/* Grab the bits from PHYIR1, and put them
|
|
* in the upper half */
|
|
phy_reg = bus->read(bus, addr, devad, MII_PHYSID1);
|
|
|
|
if (phy_reg < 0)
|
|
return -EIO;
|
|
|
|
*phy_id = (phy_reg & 0xffff) << 16;
|
|
|
|
/* Grab the bits from PHYIR2, and put them in the lower half */
|
|
phy_reg = bus->read(bus, addr, devad, MII_PHYSID2);
|
|
|
|
if (phy_reg < 0)
|
|
return -EIO;
|
|
|
|
*phy_id |= (phy_reg & 0xffff);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* get_phy_device - reads the specified PHY device and returns its @phy_device struct
|
|
* @bus: the target MII bus
|
|
* @addr: PHY address on the MII bus
|
|
*
|
|
* Description: Reads the ID registers of the PHY at @addr on the
|
|
* @bus, then allocates and returns the phy_device to represent it.
|
|
*/
|
|
struct phy_device *get_phy_device(struct mii_dev *bus, int addr,
|
|
phy_interface_t interface)
|
|
{
|
|
u32 phy_id = 0x1fffffff;
|
|
int i;
|
|
int r;
|
|
|
|
/* If we have one, return the existing device, with new interface */
|
|
if (bus->phymap[addr]) {
|
|
bus->phymap[addr]->interface = interface;
|
|
|
|
return bus->phymap[addr];
|
|
}
|
|
|
|
/* Try Standard (ie Clause 22) access */
|
|
r = get_phy_id(bus, addr, MDIO_DEVAD_NONE, &phy_id);
|
|
if (r)
|
|
return NULL;
|
|
|
|
/* If the PHY ID is mostly f's, we didn't find anything */
|
|
if ((phy_id & 0x1fffffff) != 0x1fffffff)
|
|
return phy_device_create(bus, addr, phy_id, interface);
|
|
|
|
/* Otherwise we have to try Clause 45 */
|
|
for (i = 1; i < 5; i++) {
|
|
r = get_phy_id(bus, addr, i, &phy_id);
|
|
if (r)
|
|
return NULL;
|
|
|
|
/* If the phy_id is mostly Fs, there is no device there */
|
|
if ((phy_id & 0x1fffffff) != 0x1fffffff)
|
|
break;
|
|
}
|
|
|
|
return phy_device_create(bus, addr, phy_id, interface);
|
|
}
|
|
|
|
int phy_reset(struct phy_device *phydev)
|
|
{
|
|
int reg;
|
|
int timeout = 500;
|
|
int devad = MDIO_DEVAD_NONE;
|
|
|
|
#ifdef CONFIG_PHYLIB_10G
|
|
/* If it's 10G, we need to issue reset through one of the MMDs */
|
|
if (is_10g_interface(phydev->interface)) {
|
|
if (!phydev->mmds)
|
|
gen10g_discover_mmds(phydev);
|
|
|
|
devad = ffs(phydev->mmds) - 1;
|
|
}
|
|
#endif
|
|
|
|
reg = phy_read(phydev, devad, MII_BMCR);
|
|
if (reg < 0) {
|
|
debug("PHY status read failed\n");
|
|
return -1;
|
|
}
|
|
|
|
reg |= BMCR_RESET;
|
|
|
|
if (phy_write(phydev, devad, MII_BMCR, reg) < 0) {
|
|
debug("PHY reset failed\n");
|
|
return -1;
|
|
}
|
|
|
|
#ifdef CONFIG_PHY_RESET_DELAY
|
|
udelay(CONFIG_PHY_RESET_DELAY); /* Intel LXT971A needs this */
|
|
#endif
|
|
/*
|
|
* Poll the control register for the reset bit to go to 0 (it is
|
|
* auto-clearing). This should happen within 0.5 seconds per the
|
|
* IEEE spec.
|
|
*/
|
|
while ((reg & BMCR_RESET) && timeout--) {
|
|
reg = phy_read(phydev, devad, MII_BMCR);
|
|
|
|
if (reg < 0) {
|
|
debug("PHY status read failed\n");
|
|
return -1;
|
|
}
|
|
udelay(1000);
|
|
}
|
|
|
|
if (reg & BMCR_RESET) {
|
|
puts("PHY reset timed out\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int miiphy_reset(const char *devname, unsigned char addr)
|
|
{
|
|
struct mii_dev *bus = miiphy_get_dev_by_name(devname);
|
|
struct phy_device *phydev;
|
|
|
|
/*
|
|
* miiphy_reset was only used on standard PHYs, so we'll fake it here.
|
|
* If later code tries to connect with the right interface, this will
|
|
* be corrected by get_phy_device in phy_connect()
|
|
*/
|
|
phydev = get_phy_device(bus, addr, PHY_INTERFACE_MODE_MII);
|
|
|
|
return phy_reset(phydev);
|
|
}
|
|
|
|
struct phy_device *phy_connect(struct mii_dev *bus, int addr,
|
|
struct eth_device *dev,
|
|
phy_interface_t interface)
|
|
{
|
|
struct phy_device *phydev;
|
|
|
|
/* Reset the bus */
|
|
if (bus->reset)
|
|
bus->reset(bus);
|
|
|
|
/* Wait 15ms to make sure the PHY has come out of hard reset */
|
|
udelay(15000);
|
|
|
|
phydev = get_phy_device(bus, addr, interface);
|
|
|
|
if (!phydev) {
|
|
printf("Could not get PHY for %s:%d\n", bus->name, addr);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Soft Reset the PHY */
|
|
phy_reset(phydev);
|
|
|
|
if (phydev->dev)
|
|
printf("%s:%d is connected to %s. Reconnecting to %s\n",
|
|
bus->name, addr, phydev->dev->name, dev->name);
|
|
|
|
phydev->dev = dev;
|
|
|
|
debug("%s connected to %s\n", dev->name, phydev->drv->name);
|
|
|
|
return phydev;
|
|
}
|
|
|
|
int phy_startup(struct phy_device *phydev)
|
|
{
|
|
if (phydev->drv->startup)
|
|
phydev->drv->startup(phydev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __board_phy_config(struct phy_device *phydev)
|
|
{
|
|
if (phydev->drv->config)
|
|
return phydev->drv->config(phydev);
|
|
return 0;
|
|
}
|
|
|
|
int board_phy_config(struct phy_device *phydev)
|
|
__attribute__((weak, alias("__board_phy_config")));
|
|
|
|
int phy_config(struct phy_device *phydev)
|
|
{
|
|
/* Invoke an optional board-specific helper */
|
|
board_phy_config(phydev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int phy_shutdown(struct phy_device *phydev)
|
|
{
|
|
if (phydev->drv->shutdown)
|
|
phydev->drv->shutdown(phydev);
|
|
|
|
return 0;
|
|
}
|