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/*
* RealTek PHY drivers
*
* SPDX-License-Identifier: GPL-2.0+
*
* Copyright 2010-2011 Freescale Semiconductor, Inc.
* author Andy Fleming
*/
#include <config.h>
#include <common.h>
#include <phy.h>
#define PHY_AUTONEGOTIATE_TIMEOUT 5000
/* RTL8211B PHY Status Register */
#define MIIM_RTL8211B_PHY_STATUS 0x11
#define MIIM_RTL8211B_PHYSTAT_SPEED 0xc000
#define MIIM_RTL8211B_PHYSTAT_GBIT 0x8000
#define MIIM_RTL8211B_PHYSTAT_100 0x4000
#define MIIM_RTL8211B_PHYSTAT_DUPLEX 0x2000
#define MIIM_RTL8211B_PHYSTAT_SPDDONE 0x0800
#define MIIM_RTL8211B_PHYSTAT_LINK 0x0400
/* RealTek RTL8211B */
static int rtl8211b_config(struct phy_device *phydev)
{
phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);
genphy_config_aneg(phydev);
return 0;
}
static int rtl8211b_parse_status(struct phy_device *phydev)
{
unsigned int speed;
unsigned int mii_reg;
mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211B_PHY_STATUS);
if (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
int i = 0;
/* in case of timeout ->link is cleared */
phydev->link = 1;
puts("Waiting for PHY realtime link");
while (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
/* Timeout reached ? */
if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
puts(" TIMEOUT !\n");
phydev->link = 0;
break;
}
if ((i++ % 1000) == 0)
putc('.');
udelay(1000); /* 1 ms */
mii_reg = phy_read(phydev, MDIO_DEVAD_NONE,
MIIM_RTL8211B_PHY_STATUS);
}
puts(" done\n");
udelay(500000); /* another 500 ms (results in faster booting) */
} else {
if (mii_reg & MIIM_RTL8211B_PHYSTAT_LINK)
phydev->link = 1;
else
phydev->link = 0;
}
if (mii_reg & MIIM_RTL8211B_PHYSTAT_DUPLEX)
phydev->duplex = DUPLEX_FULL;
else
phydev->duplex = DUPLEX_HALF;
speed = (mii_reg & MIIM_RTL8211B_PHYSTAT_SPEED);
switch (speed) {
case MIIM_RTL8211B_PHYSTAT_GBIT:
phydev->speed = SPEED_1000;
break;
case MIIM_RTL8211B_PHYSTAT_100:
phydev->speed = SPEED_100;
break;
default:
phydev->speed = SPEED_10;
}
return 0;
}
static int rtl8211b_startup(struct phy_device *phydev)
{
/* Read the Status (2x to make sure link is right) */
genphy_update_link(phydev);
rtl8211b_parse_status(phydev);
return 0;
}
static struct phy_driver RTL8211B_driver = {
.name = "RealTek RTL8211B",
.uid = 0x1cc910,
.mask = 0xfffff0,
.features = PHY_GBIT_FEATURES,
.config = &rtl8211b_config,
.startup = &rtl8211b_startup,
.shutdown = &genphy_shutdown,
};
int phy_realtek_init(void)
{
phy_register(&RTL8211B_driver);
return 0;
}
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