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