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// SPDX-License-Identifier: GPL-2.0+
/*
* Generic PHY Management code
*
* Copyright 2011 Freescale Semiconductor, Inc.
* author Andy Fleming
*
* Based loosely off of Linux's PHY Lib
*/
#include <common.h>
#include <miiphy.h>
#include <phy.h>
int gen10g_shutdown(struct phy_device *phydev)
{
return 0;
}
int gen10g_startup(struct phy_device *phydev)
{
int devad, reg;
u32 mmd_mask = phydev->mmds & MDIO_DEVS_LINK;
phydev->link = 1;
/* For now just lie and say it's 10G all the time */
phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL;
/*
* Go through all the link-reporting devices, and make sure
* they're all up and happy
*/
for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) {
if (!(mmd_mask & 1))
continue;
/* Read twice because link state is latched and a
* read moves the current state into the register */
phy_read(phydev, devad, MDIO_STAT1);
reg = phy_read(phydev, devad, MDIO_STAT1);
if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
phydev->link = 0;
}
return 0;
}
int gen10g_discover_mmds(struct phy_device *phydev)
{
int mmd, stat2, devs1, devs2;
/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
* XS or DTE XS; give up if none is present. */
for (mmd = 1; mmd <= 5; mmd++) {
/* Is this MMD present? */
stat2 = phy_read(phydev, mmd, MDIO_STAT2);
if (stat2 < 0 ||
(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
continue;
/* It should tell us about all the other MMDs */
devs1 = phy_read(phydev, mmd, MDIO_DEVS1);
devs2 = phy_read(phydev, mmd, MDIO_DEVS2);
if (devs1 < 0 || devs2 < 0)
continue;
phydev->mmds = devs1 | (devs2 << 16);
return 0;
}
return 0;
}
int gen10g_config(struct phy_device *phydev)
{
/* For now, assume 10000baseT. Fill in later */
phydev->supported = phydev->advertising = SUPPORTED_10000baseT_Full;
return gen10g_discover_mmds(phydev);
}
struct phy_driver gen10g_driver = {
.uid = 0xffffffff,
.mask = 0xffffffff,
.name = "Generic 10G PHY",
.features = 0,
.config = gen10g_config,
.startup = gen10g_startup,
.shutdown = gen10g_shutdown,
};
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