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sungem_phy.c

/*
 * PHY drivers for the sungem ethernet driver.
 *
 * This file could be shared with other drivers.
 *
 * (c) 2002-2007, Benjamin Herrenscmidt (benh@kernel.crashing.org)
 *
 * TODO:
 *  - Add support for PHYs that provide an IRQ line
 *  - Eventually moved the entire polling state machine in
 *    there (out of the eth driver), so that it can easily be
 *    skipped on PHYs that implement it in hardware.
 *  - On LXT971 & BCM5201, Apple uses some chip specific regs
 *    to read the link status. Figure out why and if it makes
 *    sense to do the same (magic aneg ?)
 *  - Apple has some additional power management code for some
 *    Broadcom PHYs that they "hide" from the OpenSource version
 *    of darwin, still need to reverse engineer that
 */


#include <linux/module.h>

#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/delay.h>

#ifdef CONFIG_PPC_PMAC
#include <asm/prom.h>
#endif

#include "sungem_phy.h"

/* Link modes of the BCM5400 PHY */
static const int phy_BCM5400_link_table[8][3] = {
      { 0, 0, 0 },      /* No link */
      { 0, 0, 0 },      /* 10BT Half Duplex */
      { 1, 0, 0 },      /* 10BT Full Duplex */
      { 0, 1, 0 },      /* 100BT Half Duplex */
      { 0, 1, 0 },      /* 100BT Half Duplex */
      { 1, 1, 0 },      /* 100BT Full Duplex*/
      { 1, 0, 1 },      /* 1000BT */
      { 1, 0, 1 },      /* 1000BT */
};

static inline int __phy_read(struct mii_phy* phy, int id, int reg)
{
      return phy->mdio_read(phy->dev, id, reg);
}

static inline void __phy_write(struct mii_phy* phy, int id, int reg, int val)
{
      phy->mdio_write(phy->dev, id, reg, val);
}

static inline int phy_read(struct mii_phy* phy, int reg)
{
      return phy->mdio_read(phy->dev, phy->mii_id, reg);
}

static inline void phy_write(struct mii_phy* phy, int reg, int val)
{
      phy->mdio_write(phy->dev, phy->mii_id, reg, val);
}

static int reset_one_mii_phy(struct mii_phy* phy, int phy_id)
{
      u16 val;
      int limit = 10000;

      val = __phy_read(phy, phy_id, MII_BMCR);
      val &= ~(BMCR_ISOLATE | BMCR_PDOWN);
      val |= BMCR_RESET;
      __phy_write(phy, phy_id, MII_BMCR, val);

      udelay(100);

      while (limit--) {
            val = __phy_read(phy, phy_id, MII_BMCR);
            if ((val & BMCR_RESET) == 0)
                  break;
            udelay(10);
      }
      if ((val & BMCR_ISOLATE) && limit > 0)
            __phy_write(phy, phy_id, MII_BMCR, val & ~BMCR_ISOLATE);

      return (limit <= 0);
}

static int bcm5201_init(struct mii_phy* phy)
{
      u16 data;

      data = phy_read(phy, MII_BCM5201_MULTIPHY);
      data &= ~MII_BCM5201_MULTIPHY_SUPERISOLATE;
      phy_write(phy, MII_BCM5201_MULTIPHY, data);

      phy_write(phy, MII_BCM5201_INTERRUPT, 0);

      return 0;
}

static int bcm5201_suspend(struct mii_phy* phy)
{
      phy_write(phy, MII_BCM5201_INTERRUPT, 0);
      phy_write(phy, MII_BCM5201_MULTIPHY, MII_BCM5201_MULTIPHY_SUPERISOLATE);

      return 0;
}

static int bcm5221_init(struct mii_phy* phy)
{
      u16 data;

      data = phy_read(phy, MII_BCM5221_TEST);
      phy_write(phy, MII_BCM5221_TEST,
            data | MII_BCM5221_TEST_ENABLE_SHADOWS);

      data = phy_read(phy, MII_BCM5221_SHDOW_AUX_STAT2);
      phy_write(phy, MII_BCM5221_SHDOW_AUX_STAT2,
            data | MII_BCM5221_SHDOW_AUX_STAT2_APD);

      data = phy_read(phy, MII_BCM5221_SHDOW_AUX_MODE4);
      phy_write(phy, MII_BCM5221_SHDOW_AUX_MODE4,
            data | MII_BCM5221_SHDOW_AUX_MODE4_CLKLOPWR);

      data = phy_read(phy, MII_BCM5221_TEST);
      phy_write(phy, MII_BCM5221_TEST,
            data & ~MII_BCM5221_TEST_ENABLE_SHADOWS);

      return 0;
}

static int bcm5221_suspend(struct mii_phy* phy)
{
      u16 data;

      data = phy_read(phy, MII_BCM5221_TEST);
      phy_write(phy, MII_BCM5221_TEST,
            data | MII_BCM5221_TEST_ENABLE_SHADOWS);

      data = phy_read(phy, MII_BCM5221_SHDOW_AUX_MODE4);
      phy_write(phy, MII_BCM5221_SHDOW_AUX_MODE4,
              data | MII_BCM5221_SHDOW_AUX_MODE4_IDDQMODE);

      return 0;
}

static int bcm5241_init(struct mii_phy* phy)
{
      u16 data;

      data = phy_read(phy, MII_BCM5221_TEST);
      phy_write(phy, MII_BCM5221_TEST,
            data | MII_BCM5221_TEST_ENABLE_SHADOWS);

      data = phy_read(phy, MII_BCM5221_SHDOW_AUX_STAT2);
      phy_write(phy, MII_BCM5221_SHDOW_AUX_STAT2,
            data | MII_BCM5221_SHDOW_AUX_STAT2_APD);

      data = phy_read(phy, MII_BCM5221_SHDOW_AUX_MODE4);
      phy_write(phy, MII_BCM5221_SHDOW_AUX_MODE4,
            data & ~MII_BCM5241_SHDOW_AUX_MODE4_STANDBYPWR);

      data = phy_read(phy, MII_BCM5221_TEST);
      phy_write(phy, MII_BCM5221_TEST,
            data & ~MII_BCM5221_TEST_ENABLE_SHADOWS);

      return 0;
}

static int bcm5241_suspend(struct mii_phy* phy)
{
      u16 data;

      data = phy_read(phy, MII_BCM5221_TEST);
      phy_write(phy, MII_BCM5221_TEST,
            data | MII_BCM5221_TEST_ENABLE_SHADOWS);

      data = phy_read(phy, MII_BCM5221_SHDOW_AUX_MODE4);
      phy_write(phy, MII_BCM5221_SHDOW_AUX_MODE4,
              data | MII_BCM5241_SHDOW_AUX_MODE4_STANDBYPWR);

      return 0;
}

static int bcm5400_init(struct mii_phy* phy)
{
      u16 data;

      /* Configure for gigabit full duplex */
      data = phy_read(phy, MII_BCM5400_AUXCONTROL);
      data |= MII_BCM5400_AUXCONTROL_PWR10BASET;
      phy_write(phy, MII_BCM5400_AUXCONTROL, data);

      data = phy_read(phy, MII_BCM5400_GB_CONTROL);
      data |= MII_BCM5400_GB_CONTROL_FULLDUPLEXCAP;
      phy_write(phy, MII_BCM5400_GB_CONTROL, data);

      udelay(100);

      /* Reset and configure cascaded 10/100 PHY */
      (void)reset_one_mii_phy(phy, 0x1f);

      data = __phy_read(phy, 0x1f, MII_BCM5201_MULTIPHY);
      data |= MII_BCM5201_MULTIPHY_SERIALMODE;
      __phy_write(phy, 0x1f, MII_BCM5201_MULTIPHY, data);

      data = phy_read(phy, MII_BCM5400_AUXCONTROL);
      data &= ~MII_BCM5400_AUXCONTROL_PWR10BASET;
      phy_write(phy, MII_BCM5400_AUXCONTROL, data);

      return 0;
}

static int bcm5400_suspend(struct mii_phy* phy)
{
#if 0 /* Commented out in Darwin... someone has those dawn docs ? */
      phy_write(phy, MII_BMCR, BMCR_PDOWN);
#endif
      return 0;
}

static int bcm5401_init(struct mii_phy* phy)
{
      u16 data;
      int rev;

      rev = phy_read(phy, MII_PHYSID2) & 0x000f;
      if (rev == 0 || rev == 3) {
            /* Some revisions of 5401 appear to need this
             * initialisation sequence to disable, according
             * to OF, "tap power management"
             *
             * WARNING ! OF and Darwin don't agree on the
             * register addresses. OF seem to interpret the
             * register numbers below as decimal
             *
             * Note: This should (and does) match tg3_init_5401phy_dsp
             *       in the tg3.c driver. -DaveM
             */
            phy_write(phy, 0x18, 0x0c20);
            phy_write(phy, 0x17, 0x0012);
            phy_write(phy, 0x15, 0x1804);
            phy_write(phy, 0x17, 0x0013);
            phy_write(phy, 0x15, 0x1204);
            phy_write(phy, 0x17, 0x8006);
            phy_write(phy, 0x15, 0x0132);
            phy_write(phy, 0x17, 0x8006);
            phy_write(phy, 0x15, 0x0232);
            phy_write(phy, 0x17, 0x201f);
            phy_write(phy, 0x15, 0x0a20);
      }

      /* Configure for gigabit full duplex */
      data = phy_read(phy, MII_BCM5400_GB_CONTROL);
      data |= MII_BCM5400_GB_CONTROL_FULLDUPLEXCAP;
      phy_write(phy, MII_BCM5400_GB_CONTROL, data);

      udelay(10);

      /* Reset and configure cascaded 10/100 PHY */
      (void)reset_one_mii_phy(phy, 0x1f);

      data = __phy_read(phy, 0x1f, MII_BCM5201_MULTIPHY);
      data |= MII_BCM5201_MULTIPHY_SERIALMODE;
      __phy_write(phy, 0x1f, MII_BCM5201_MULTIPHY, data);

      return 0;
}

static int bcm5401_suspend(struct mii_phy* phy)
{
#if 0 /* Commented out in Darwin... someone has those dawn docs ? */
      phy_write(phy, MII_BMCR, BMCR_PDOWN);
#endif
      return 0;
}

static int bcm5411_init(struct mii_phy* phy)
{
      u16 data;

      /* Here's some more Apple black magic to setup
       * some voltage stuffs.
       */
      phy_write(phy, 0x1c, 0x8c23);
      phy_write(phy, 0x1c, 0x8ca3);
      phy_write(phy, 0x1c, 0x8c23);

      /* Here, Apple seems to want to reset it, do
       * it as well
       */
      phy_write(phy, MII_BMCR, BMCR_RESET);
      phy_write(phy, MII_BMCR, 0x1340);

      data = phy_read(phy, MII_BCM5400_GB_CONTROL);
      data |= MII_BCM5400_GB_CONTROL_FULLDUPLEXCAP;
      phy_write(phy, MII_BCM5400_GB_CONTROL, data);

      udelay(10);

      /* Reset and configure cascaded 10/100 PHY */
      (void)reset_one_mii_phy(phy, 0x1f);

      return 0;
}

static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
{
      u16 ctl, adv;

      phy->autoneg = 1;
      phy->speed = SPEED_10;
      phy->duplex = DUPLEX_HALF;
      phy->pause = 0;
      phy->advertising = advertise;

      /* Setup standard advertise */
      adv = phy_read(phy, MII_ADVERTISE);
      adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
      if (advertise & ADVERTISED_10baseT_Half)
            adv |= ADVERTISE_10HALF;
      if (advertise & ADVERTISED_10baseT_Full)
            adv |= ADVERTISE_10FULL;
      if (advertise & ADVERTISED_100baseT_Half)
            adv |= ADVERTISE_100HALF;
      if (advertise & ADVERTISED_100baseT_Full)
            adv |= ADVERTISE_100FULL;
      phy_write(phy, MII_ADVERTISE, adv);

      /* Start/Restart aneg */
      ctl = phy_read(phy, MII_BMCR);
      ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
      phy_write(phy, MII_BMCR, ctl);

      return 0;
}

static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
{
      u16 ctl;

      phy->autoneg = 0;
      phy->speed = speed;
      phy->duplex = fd;
      phy->pause = 0;

      ctl = phy_read(phy, MII_BMCR);
      ctl &= ~(BMCR_FULLDPLX|BMCR_SPEED100|BMCR_ANENABLE);

      /* First reset the PHY */
      phy_write(phy, MII_BMCR, ctl | BMCR_RESET);

      /* Select speed & duplex */
      switch(speed) {
      case SPEED_10:
            break;
      case SPEED_100:
            ctl |= BMCR_SPEED100;
            break;
      case SPEED_1000:
      default:
            return -EINVAL;
      }
      if (fd == DUPLEX_FULL)
            ctl |= BMCR_FULLDPLX;
      phy_write(phy, MII_BMCR, ctl);

      return 0;
}

static int genmii_poll_link(struct mii_phy *phy)
{
      u16 status;

      (void)phy_read(phy, MII_BMSR);
      status = phy_read(phy, MII_BMSR);
      if ((status & BMSR_LSTATUS) == 0)
            return 0;
      if (phy->autoneg && !(status & BMSR_ANEGCOMPLETE))
            return 0;
      return 1;
}

static int genmii_read_link(struct mii_phy *phy)
{
      u16 lpa;

      if (phy->autoneg) {
            lpa = phy_read(phy, MII_LPA);

            if (lpa & (LPA_10FULL | LPA_100FULL))
                  phy->duplex = DUPLEX_FULL;
            else
                  phy->duplex = DUPLEX_HALF;
            if (lpa & (LPA_100FULL | LPA_100HALF))
                  phy->speed = SPEED_100;
            else
                  phy->speed = SPEED_10;
            phy->pause = 0;
      }
      /* On non-aneg, we assume what we put in BMCR is the speed,
       * though magic-aneg shouldn't prevent this case from occurring
       */

       return 0;
}

static int generic_suspend(struct mii_phy* phy)
{
      phy_write(phy, MII_BMCR, BMCR_PDOWN);

      return 0;
}

static int bcm5421_init(struct mii_phy* phy)
{
      u16 data;
      unsigned int id;

      id = (phy_read(phy, MII_PHYSID1) << 16 | phy_read(phy, MII_PHYSID2));

      /* Revision 0 of 5421 needs some fixups */
      if (id == 0x002060e0) {
            /* This is borrowed from MacOS
             */
            phy_write(phy, 0x18, 0x1007);
            data = phy_read(phy, 0x18);
            phy_write(phy, 0x18, data | 0x0400);
            phy_write(phy, 0x18, 0x0007);
            data = phy_read(phy, 0x18);
            phy_write(phy, 0x18, data | 0x0800);
            phy_write(phy, 0x17, 0x000a);
            data = phy_read(phy, 0x15);
            phy_write(phy, 0x15, data | 0x0200);
      }

      /* Pick up some init code from OF for K2 version */
      if ((id & 0xfffffff0) == 0x002062e0) {
            phy_write(phy, 4, 0x01e1);
            phy_write(phy, 9, 0x0300);
      }

      /* Check if we can enable automatic low power */
#ifdef CONFIG_PPC_PMAC
      if (phy->platform_data) {
            struct device_node *np = of_get_parent(phy->platform_data);
            int can_low_power = 1;
            if (np == NULL || of_get_property(np, "no-autolowpower", NULL))
                  can_low_power = 0;
            if (can_low_power) {
                  /* Enable automatic low-power */
                  phy_write(phy, 0x1c, 0x9002);
                  phy_write(phy, 0x1c, 0xa821);
                  phy_write(phy, 0x1c, 0x941d);
            }
      }
#endif /* CONFIG_PPC_PMAC */

      return 0;
}

static int bcm54xx_setup_aneg(struct mii_phy *phy, u32 advertise)
{
      u16 ctl, adv;

      phy->autoneg = 1;
      phy->speed = SPEED_10;
      phy->duplex = DUPLEX_HALF;
      phy->pause = 0;
      phy->advertising = advertise;

      /* Setup standard advertise */
      adv = phy_read(phy, MII_ADVERTISE);
      adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
      if (advertise & ADVERTISED_10baseT_Half)
            adv |= ADVERTISE_10HALF;
      if (advertise & ADVERTISED_10baseT_Full)
            adv |= ADVERTISE_10FULL;
      if (advertise & ADVERTISED_100baseT_Half)
            adv |= ADVERTISE_100HALF;
      if (advertise & ADVERTISED_100baseT_Full)
            adv |= ADVERTISE_100FULL;
      if (advertise & ADVERTISED_Pause)
            adv |= ADVERTISE_PAUSE_CAP;
      if (advertise & ADVERTISED_Asym_Pause)
            adv |= ADVERTISE_PAUSE_ASYM;
      phy_write(phy, MII_ADVERTISE, adv);

      /* Setup 1000BT advertise */
      adv = phy_read(phy, MII_1000BASETCONTROL);
      adv &= ~(MII_1000BASETCONTROL_FULLDUPLEXCAP|MII_1000BASETCONTROL_HALFDUPLEXCAP);
      if (advertise & SUPPORTED_1000baseT_Half)
            adv |= MII_1000BASETCONTROL_HALFDUPLEXCAP;
      if (advertise & SUPPORTED_1000baseT_Full)
            adv |= MII_1000BASETCONTROL_FULLDUPLEXCAP;
      phy_write(phy, MII_1000BASETCONTROL, adv);

      /* Start/Restart aneg */
      ctl = phy_read(phy, MII_BMCR);
      ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
      phy_write(phy, MII_BMCR, ctl);

      return 0;
}

static int bcm54xx_setup_forced(struct mii_phy *phy, int speed, int fd)
{
      u16 ctl;

      phy->autoneg = 0;
      phy->speed = speed;
      phy->duplex = fd;
      phy->pause = 0;

      ctl = phy_read(phy, MII_BMCR);
      ctl &= ~(BMCR_FULLDPLX|BMCR_SPEED100|BMCR_SPD2|BMCR_ANENABLE);

      /* First reset the PHY */
      phy_write(phy, MII_BMCR, ctl | BMCR_RESET);

      /* Select speed & duplex */
      switch(speed) {
      case SPEED_10:
            break;
      case SPEED_100:
            ctl |= BMCR_SPEED100;
            break;
      case SPEED_1000:
            ctl |= BMCR_SPD2;
      }
      if (fd == DUPLEX_FULL)
            ctl |= BMCR_FULLDPLX;

      // XXX Should we set the sungem to GII now on 1000BT ?

      phy_write(phy, MII_BMCR, ctl);

      return 0;
}

static int bcm54xx_read_link(struct mii_phy *phy)
{
      int link_mode;
      u16 val;

      if (phy->autoneg) {
            val = phy_read(phy, MII_BCM5400_AUXSTATUS);
            link_mode = ((val & MII_BCM5400_AUXSTATUS_LINKMODE_MASK) >>
                       MII_BCM5400_AUXSTATUS_LINKMODE_SHIFT);
            phy->duplex = phy_BCM5400_link_table[link_mode][0] ?
                  DUPLEX_FULL : DUPLEX_HALF;
            phy->speed = phy_BCM5400_link_table[link_mode][2] ?
                        SPEED_1000 :
                        (phy_BCM5400_link_table[link_mode][1] ?
                         SPEED_100 : SPEED_10);
            val = phy_read(phy, MII_LPA);
            phy->pause = (phy->duplex == DUPLEX_FULL) &&
                  ((val & LPA_PAUSE) != 0);
      }
      /* On non-aneg, we assume what we put in BMCR is the speed,
       * though magic-aneg shouldn't prevent this case from occurring
       */

      return 0;
}

static int marvell88e1111_init(struct mii_phy* phy)
{
      u16 rev;

      /* magic init sequence for rev 0 */
      rev = phy_read(phy, MII_PHYSID2) & 0x000f;
      if (rev == 0) {
            phy_write(phy, 0x1d, 0x000a);
            phy_write(phy, 0x1e, 0x0821);

            phy_write(phy, 0x1d, 0x0006);
            phy_write(phy, 0x1e, 0x8600);

            phy_write(phy, 0x1d, 0x000b);
            phy_write(phy, 0x1e, 0x0100);

            phy_write(phy, 0x1d, 0x0004);
            phy_write(phy, 0x1e, 0x4850);
      }
      return 0;
}

#define BCM5421_MODE_MASK     (1 << 5)

static int bcm5421_poll_link(struct mii_phy* phy)
{
      u32 phy_reg;
      int mode;

      /* find out in what mode we are */
      phy_write(phy, MII_NCONFIG, 0x1000);
      phy_reg = phy_read(phy, MII_NCONFIG);

      mode = (phy_reg & BCM5421_MODE_MASK) >> 5;

      if ( mode == BCM54XX_COPPER)
            return genmii_poll_link(phy);

      /* try to find out wether we have a link */
      phy_write(phy, MII_NCONFIG, 0x2000);
      phy_reg = phy_read(phy, MII_NCONFIG);

      if (phy_reg & 0x0020)
            return 0;
      else
            return 1;
}

static int bcm5421_read_link(struct mii_phy* phy)
{
      u32 phy_reg;
      int mode;

      /* find out in what mode we are */
      phy_write(phy, MII_NCONFIG, 0x1000);
      phy_reg = phy_read(phy, MII_NCONFIG);

      mode = (phy_reg & BCM5421_MODE_MASK ) >> 5;

      if ( mode == BCM54XX_COPPER)
            return bcm54xx_read_link(phy);

      phy->speed = SPEED_1000;

      /* find out wether we are running half- or full duplex */
      phy_write(phy, MII_NCONFIG, 0x2000);
      phy_reg = phy_read(phy, MII_NCONFIG);

      if ( (phy_reg & 0x0080) >> 7)
            phy->duplex |=  DUPLEX_HALF;
      else
            phy->duplex |=  DUPLEX_FULL;

      return 0;
}

static int bcm5421_enable_fiber(struct mii_phy* phy, int autoneg)
{
      /* enable fiber mode */
      phy_write(phy, MII_NCONFIG, 0x9020);
      /* LEDs active in both modes, autosense prio = fiber */
      phy_write(phy, MII_NCONFIG, 0x945f);

      if (!autoneg) {
            /* switch off fibre autoneg */
            phy_write(phy, MII_NCONFIG, 0xfc01);
            phy_write(phy, 0x0b, 0x0004);
      }

      phy->autoneg = autoneg;

      return 0;
}

#define BCM5461_FIBER_LINK    (1 << 2)
#define BCM5461_MODE_MASK     (3 << 1)

static int bcm5461_poll_link(struct mii_phy* phy)
{
      u32 phy_reg;
      int mode;

      /* find out in what mode we are */
      phy_write(phy, MII_NCONFIG, 0x7c00);
      phy_reg = phy_read(phy, MII_NCONFIG);

      mode = (phy_reg & BCM5461_MODE_MASK ) >> 1;

      if ( mode == BCM54XX_COPPER)
            return genmii_poll_link(phy);

      /* find out wether we have a link */
      phy_write(phy, MII_NCONFIG, 0x7000);
      phy_reg = phy_read(phy, MII_NCONFIG);

      if (phy_reg & BCM5461_FIBER_LINK)
            return 1;
      else
            return 0;
}

#define BCM5461_FIBER_DUPLEX  (1 << 3)

static int bcm5461_read_link(struct mii_phy* phy)
{
      u32 phy_reg;
      int mode;

      /* find out in what mode we are */
      phy_write(phy, MII_NCONFIG, 0x7c00);
      phy_reg = phy_read(phy, MII_NCONFIG);

      mode = (phy_reg & BCM5461_MODE_MASK ) >> 1;

      if ( mode == BCM54XX_COPPER) {
            return bcm54xx_read_link(phy);
      }

      phy->speed = SPEED_1000;

      /* find out wether we are running half- or full duplex */
      phy_write(phy, MII_NCONFIG, 0x7000);
      phy_reg = phy_read(phy, MII_NCONFIG);

      if (phy_reg & BCM5461_FIBER_DUPLEX)
            phy->duplex |=  DUPLEX_FULL;
      else
            phy->duplex |=  DUPLEX_HALF;

      return 0;
}

static int bcm5461_enable_fiber(struct mii_phy* phy, int autoneg)
{
      /* select fiber mode, enable 1000 base-X registers */
      phy_write(phy, MII_NCONFIG, 0xfc0b);

      if (autoneg) {
            /* enable fiber with no autonegotiation */
            phy_write(phy, MII_ADVERTISE, 0x01e0);
            phy_write(phy, MII_BMCR, 0x1140);
      } else {
            /* enable fiber with autonegotiation */
            phy_write(phy, MII_BMCR, 0x0140);
      }

      phy->autoneg = autoneg;

      return 0;
}

static int marvell_setup_aneg(struct mii_phy *phy, u32 advertise)
{
      u16 ctl, adv;

      phy->autoneg = 1;
      phy->speed = SPEED_10;
      phy->duplex = DUPLEX_HALF;
      phy->pause = 0;
      phy->advertising = advertise;

      /* Setup standard advertise */
      adv = phy_read(phy, MII_ADVERTISE);
      adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4);
      if (advertise & ADVERTISED_10baseT_Half)
            adv |= ADVERTISE_10HALF;
      if (advertise & ADVERTISED_10baseT_Full)
            adv |= ADVERTISE_10FULL;
      if (advertise & ADVERTISED_100baseT_Half)
            adv |= ADVERTISE_100HALF;
      if (advertise & ADVERTISED_100baseT_Full)
            adv |= ADVERTISE_100FULL;
      if (advertise & ADVERTISED_Pause)
            adv |= ADVERTISE_PAUSE_CAP;
      if (advertise & ADVERTISED_Asym_Pause)
            adv |= ADVERTISE_PAUSE_ASYM;
      phy_write(phy, MII_ADVERTISE, adv);

      /* Setup 1000BT advertise & enable crossover detect
       * XXX How do we advertise 1000BT ? Darwin source is
       * confusing here, they read from specific control and
       * write to control... Someone has specs for those
       * beasts ?
       */
      adv = phy_read(phy, MII_M1011_PHY_SPEC_CONTROL);
      adv |= MII_M1011_PHY_SPEC_CONTROL_AUTO_MDIX;
      adv &= ~(MII_1000BASETCONTROL_FULLDUPLEXCAP |
                  MII_1000BASETCONTROL_HALFDUPLEXCAP);
      if (advertise & SUPPORTED_1000baseT_Half)
            adv |= MII_1000BASETCONTROL_HALFDUPLEXCAP;
      if (advertise & SUPPORTED_1000baseT_Full)
            adv |= MII_1000BASETCONTROL_FULLDUPLEXCAP;
      phy_write(phy, MII_1000BASETCONTROL, adv);

      /* Start/Restart aneg */
      ctl = phy_read(phy, MII_BMCR);
      ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
      phy_write(phy, MII_BMCR, ctl);

      return 0;
}

static int marvell_setup_forced(struct mii_phy *phy, int speed, int fd)
{
      u16 ctl, ctl2;

      phy->autoneg = 0;
      phy->speed = speed;
      phy->duplex = fd;
      phy->pause = 0;

      ctl = phy_read(phy, MII_BMCR);
      ctl &= ~(BMCR_FULLDPLX|BMCR_SPEED100|BMCR_SPD2|BMCR_ANENABLE);
      ctl |= BMCR_RESET;

      /* Select speed & duplex */
      switch(speed) {
      case SPEED_10:
            break;
      case SPEED_100:
            ctl |= BMCR_SPEED100;
            break;
      /* I'm not sure about the one below, again, Darwin source is
       * quite confusing and I lack chip specs
       */
      case SPEED_1000:
            ctl |= BMCR_SPD2;
      }
      if (fd == DUPLEX_FULL)
            ctl |= BMCR_FULLDPLX;

      /* Disable crossover. Again, the way Apple does it is strange,
       * though I don't assume they are wrong ;)
       */
      ctl2 = phy_read(phy, MII_M1011_PHY_SPEC_CONTROL);
      ctl2 &= ~(MII_M1011_PHY_SPEC_CONTROL_MANUAL_MDIX |
            MII_M1011_PHY_SPEC_CONTROL_AUTO_MDIX |
            MII_1000BASETCONTROL_FULLDUPLEXCAP |
            MII_1000BASETCONTROL_HALFDUPLEXCAP);
      if (speed == SPEED_1000)
            ctl2 |= (fd == DUPLEX_FULL) ?
                  MII_1000BASETCONTROL_FULLDUPLEXCAP :
                  MII_1000BASETCONTROL_HALFDUPLEXCAP;
      phy_write(phy, MII_1000BASETCONTROL, ctl2);

      // XXX Should we set the sungem to GII now on 1000BT ?

      phy_write(phy, MII_BMCR, ctl);

      return 0;
}

static int marvell_read_link(struct mii_phy *phy)
{
      u16 status, pmask;

      if (phy->autoneg) {
            status = phy_read(phy, MII_M1011_PHY_SPEC_STATUS);
            if ((status & MII_M1011_PHY_SPEC_STATUS_RESOLVED) == 0)
                  return -EAGAIN;
            if (status & MII_M1011_PHY_SPEC_STATUS_1000)
                  phy->speed = SPEED_1000;
            else if (status & MII_M1011_PHY_SPEC_STATUS_100)
                  phy->speed = SPEED_100;
            else
                  phy->speed = SPEED_10;
            if (status & MII_M1011_PHY_SPEC_STATUS_FULLDUPLEX)
                  phy->duplex = DUPLEX_FULL;
            else
                  phy->duplex = DUPLEX_HALF;
            pmask = MII_M1011_PHY_SPEC_STATUS_TX_PAUSE |
                  MII_M1011_PHY_SPEC_STATUS_RX_PAUSE;
            phy->pause = (status & pmask) == pmask;
      }
      /* On non-aneg, we assume what we put in BMCR is the speed,
       * though magic-aneg shouldn't prevent this case from occurring
       */

      return 0;
}

#define MII_BASIC_FEATURES \
      (SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |    \
       SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |  \
       SUPPORTED_Autoneg | SUPPORTED_TP | SUPPORTED_MII |   \
       SUPPORTED_Pause)

/* On gigabit capable PHYs, we advertise Pause support but not asym pause
 * support for now as I'm not sure it's supported and Darwin doesn't do
 * it neither. --BenH.
 */
#define MII_GBIT_FEATURES \
      (MII_BASIC_FEATURES |   \
       SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full)

/* Broadcom BCM 5201 */
static struct mii_phy_ops bcm5201_phy_ops = {
      .init       = bcm5201_init,
      .suspend    = bcm5201_suspend,
      .setup_aneg = genmii_setup_aneg,
      .setup_forced     = genmii_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = genmii_read_link,
};

static struct mii_phy_def bcm5201_phy_def = {
      .phy_id           = 0x00406210,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5201",
      .features   = MII_BASIC_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5201_phy_ops
};

/* Broadcom BCM 5221 */
static struct mii_phy_ops bcm5221_phy_ops = {
      .suspend    = bcm5221_suspend,
      .init       = bcm5221_init,
      .setup_aneg = genmii_setup_aneg,
      .setup_forced     = genmii_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = genmii_read_link,
};

static struct mii_phy_def bcm5221_phy_def = {
      .phy_id           = 0x004061e0,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5221",
      .features   = MII_BASIC_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5221_phy_ops
};

/* Broadcom BCM 5241 */
static struct mii_phy_ops bcm5241_phy_ops = {
      .suspend    = bcm5241_suspend,
      .init       = bcm5241_init,
      .setup_aneg = genmii_setup_aneg,
      .setup_forced     = genmii_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = genmii_read_link,
};
static struct mii_phy_def bcm5241_phy_def = {
      .phy_id           = 0x0143bc30,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5241",
      .features   = MII_BASIC_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5241_phy_ops
};

/* Broadcom BCM 5400 */
static struct mii_phy_ops bcm5400_phy_ops = {
      .init       = bcm5400_init,
      .suspend    = bcm5400_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = bcm54xx_read_link,
};

static struct mii_phy_def bcm5400_phy_def = {
      .phy_id           = 0x00206040,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5400",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5400_phy_ops
};

/* Broadcom BCM 5401 */
static struct mii_phy_ops bcm5401_phy_ops = {
      .init       = bcm5401_init,
      .suspend    = bcm5401_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = bcm54xx_read_link,
};

static struct mii_phy_def bcm5401_phy_def = {
      .phy_id           = 0x00206050,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5401",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5401_phy_ops
};

/* Broadcom BCM 5411 */
static struct mii_phy_ops bcm5411_phy_ops = {
      .init       = bcm5411_init,
      .suspend    = generic_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = bcm54xx_read_link,
};

static struct mii_phy_def bcm5411_phy_def = {
      .phy_id           = 0x00206070,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5411",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5411_phy_ops
};

/* Broadcom BCM 5421 */
static struct mii_phy_ops bcm5421_phy_ops = {
      .init       = bcm5421_init,
      .suspend    = generic_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = bcm5421_poll_link,
      .read_link  = bcm5421_read_link,
      .enable_fiber   = bcm5421_enable_fiber,
};

static struct mii_phy_def bcm5421_phy_def = {
      .phy_id           = 0x002060e0,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5421",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5421_phy_ops
};

/* Broadcom BCM 5421 built-in K2 */
static struct mii_phy_ops bcm5421k2_phy_ops = {
      .init       = bcm5421_init,
      .suspend    = generic_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = bcm54xx_read_link,
};

static struct mii_phy_def bcm5421k2_phy_def = {
      .phy_id           = 0x002062e0,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5421-K2",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5421k2_phy_ops
};

static struct mii_phy_ops bcm5461_phy_ops = {
      .init       = bcm5421_init,
      .suspend    = generic_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = bcm5461_poll_link,
      .read_link  = bcm5461_read_link,
      .enable_fiber   = bcm5461_enable_fiber,
};

static struct mii_phy_def bcm5461_phy_def = {
      .phy_id           = 0x002060c0,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5461",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5461_phy_ops
};

/* Broadcom BCM 5462 built-in Vesta */
static struct mii_phy_ops bcm5462V_phy_ops = {
      .init       = bcm5421_init,
      .suspend    = generic_suspend,
      .setup_aneg = bcm54xx_setup_aneg,
      .setup_forced     = bcm54xx_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = bcm54xx_read_link,
};

static struct mii_phy_def bcm5462V_phy_def = {
      .phy_id           = 0x002060d0,
      .phy_id_mask      = 0xfffffff0,
      .name       = "BCM5462-Vesta",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &bcm5462V_phy_ops
};

/* Marvell 88E1101 amd 88E1111 */
static struct mii_phy_ops marvell88e1101_phy_ops = {
      .suspend    = generic_suspend,
      .setup_aneg = marvell_setup_aneg,
      .setup_forced     = marvell_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = marvell_read_link
};

static struct mii_phy_ops marvell88e1111_phy_ops = {
      .init       = marvell88e1111_init,
      .suspend    = generic_suspend,
      .setup_aneg = marvell_setup_aneg,
      .setup_forced     = marvell_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = marvell_read_link
};

/* two revs in darwin for the 88e1101 ... I could use a datasheet
 * to get the proper names...
 */
static struct mii_phy_def marvell88e1101v1_phy_def = {
      .phy_id           = 0x01410c20,
      .phy_id_mask      = 0xfffffff0,
      .name       = "Marvell 88E1101v1",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &marvell88e1101_phy_ops
};
static struct mii_phy_def marvell88e1101v2_phy_def = {
      .phy_id           = 0x01410c60,
      .phy_id_mask      = 0xfffffff0,
      .name       = "Marvell 88E1101v2",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &marvell88e1101_phy_ops
};
static struct mii_phy_def marvell88e1111_phy_def = {
      .phy_id           = 0x01410cc0,
      .phy_id_mask      = 0xfffffff0,
      .name       = "Marvell 88E1111",
      .features   = MII_GBIT_FEATURES,
      .magic_aneg = 1,
      .ops        = &marvell88e1111_phy_ops
};

/* Generic implementation for most 10/100 PHYs */
static struct mii_phy_ops generic_phy_ops = {
      .setup_aneg = genmii_setup_aneg,
      .setup_forced     = genmii_setup_forced,
      .poll_link  = genmii_poll_link,
      .read_link  = genmii_read_link
};

static struct mii_phy_def genmii_phy_def = {
      .phy_id           = 0x00000000,
      .phy_id_mask      = 0x00000000,
      .name       = "Generic MII",
      .features   = MII_BASIC_FEATURES,
      .magic_aneg = 0,
      .ops        = &generic_phy_ops
};

static struct mii_phy_def* mii_phy_table[] = {
      &bcm5201_phy_def,
      &bcm5221_phy_def,
      &bcm5241_phy_def,
      &bcm5400_phy_def,
      &bcm5401_phy_def,
      &bcm5411_phy_def,
      &bcm5421_phy_def,
      &bcm5421k2_phy_def,
      &bcm5461_phy_def,
      &bcm5462V_phy_def,
      &marvell88e1101v1_phy_def,
      &marvell88e1101v2_phy_def,
      &marvell88e1111_phy_def,
      &genmii_phy_def,
      NULL
};

int mii_phy_probe(struct mii_phy *phy, int mii_id)
{
      int rc;
      u32 id;
      struct mii_phy_def* def;
      int i;

      /* We do not reset the mii_phy structure as the driver
       * may re-probe the PHY regulary
       */
      phy->mii_id = mii_id;

      /* Take PHY out of isloate mode and reset it. */
      rc = reset_one_mii_phy(phy, mii_id);
      if (rc)
            goto fail;

      /* Read ID and find matching entry */
      id = (phy_read(phy, MII_PHYSID1) << 16 | phy_read(phy, MII_PHYSID2));
      printk(KERN_DEBUG "PHY ID: %x, addr: %x\n", id, mii_id);
      for (i=0; (def = mii_phy_table[i]) != NULL; i++)
            if ((id & def->phy_id_mask) == def->phy_id)
                  break;
      /* Should never be NULL (we have a generic entry), but... */
      if (def == NULL)
            goto fail;

      phy->def = def;

      return 0;
fail:
      phy->speed = 0;
      phy->duplex = 0;
      phy->pause = 0;
      phy->advertising = 0;
      return -ENODEV;
}

EXPORT_SYMBOL(mii_phy_probe);
MODULE_LICENSE("GPL");


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