95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
/*
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* Generic PHY Management code
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*
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* SPDX-License-Identifier: GPL-2.0+
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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 <miiphy.h>
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#include <phy.h>
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int gen10g_shutdown(struct phy_device *phydev)
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{
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return 0;
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}
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int gen10g_startup(struct phy_device *phydev)
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{
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int devad, reg;
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u32 mmd_mask = phydev->mmds & MDIO_DEVS_LINK;
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phydev->link = 1;
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/* For now just lie and say it's 10G all the time */
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phydev->speed = SPEED_10000;
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phydev->duplex = DUPLEX_FULL;
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/*
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* Go through all the link-reporting devices, and make sure
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* they're all up and happy
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*/
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for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) {
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if (!(mmd_mask & 1))
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continue;
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/* Read twice because link state is latched and a
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* read moves the current state into the register */
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phy_read(phydev, devad, MDIO_STAT1);
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reg = phy_read(phydev, devad, MDIO_STAT1);
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if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
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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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int gen10g_discover_mmds(struct phy_device *phydev)
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{
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int mmd, stat2, devs1, devs2;
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/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
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* XS or DTE XS; give up if none is present. */
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for (mmd = 1; mmd <= 5; mmd++) {
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/* Is this MMD present? */
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stat2 = phy_read(phydev, mmd, MDIO_STAT2);
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if (stat2 < 0 ||
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(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
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continue;
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/* It should tell us about all the other MMDs */
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devs1 = phy_read(phydev, mmd, MDIO_DEVS1);
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devs2 = phy_read(phydev, mmd, MDIO_DEVS2);
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if (devs1 < 0 || devs2 < 0)
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continue;
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phydev->mmds = devs1 | (devs2 << 16);
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return 0;
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}
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return 0;
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}
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int gen10g_config(struct phy_device *phydev)
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{
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/* For now, assume 10000baseT. Fill in later */
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phydev->supported = phydev->advertising = SUPPORTED_10000baseT_Full;
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return gen10g_discover_mmds(phydev);
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}
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struct phy_driver gen10g_driver = {
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.uid = 0xffffffff,
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.mask = 0xffffffff,
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.name = "Generic 10G PHY",
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.features = 0,
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.config = gen10g_config,
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.startup = gen10g_startup,
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.shutdown = gen10g_shutdown,
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};
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