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3cee138892
Some Realtek Ethernet PHYs, like RTL8211D(G/N) and RTL8211E(G), have interrupts enabled by default. If the interrupt is not treated later by the OS and the PHY's interrupt line is enabled and shared with other interrupts, the system will get an interrupt storm. This patch disables the interrupt for PHY devices that use one of the current Realtek Ethernet PHY drivers. Some of Realtek Ethernet PHYs, such as RTL8211B(L) have the interrupt masked. In this case, the functionality of the PHY should not be afected since this patch brings INER and INSR registers to their default values. Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@freescale.com> Acked-by: Joe Hershberger <joe.hershberger@ni.com>
157 lines
3.7 KiB
C
157 lines
3.7 KiB
C
/*
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* RealTek PHY drivers
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* Copyright 2010-2011, 2015 Freescale Semiconductor, Inc.
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* author Andy Fleming
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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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/* RTL8211x PHY Status Register */
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#define MIIM_RTL8211x_PHY_STATUS 0x11
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#define MIIM_RTL8211x_PHYSTAT_SPEED 0xc000
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#define MIIM_RTL8211x_PHYSTAT_GBIT 0x8000
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#define MIIM_RTL8211x_PHYSTAT_100 0x4000
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#define MIIM_RTL8211x_PHYSTAT_DUPLEX 0x2000
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#define MIIM_RTL8211x_PHYSTAT_SPDDONE 0x0800
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#define MIIM_RTL8211x_PHYSTAT_LINK 0x0400
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/* RTL8211x PHY Interrupt Enable Register */
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#define MIIM_RTL8211x_PHY_INER 0x12
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#define MIIM_RTL8211x_PHY_INTR_ENA 0x9f01
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#define MIIM_RTL8211x_PHY_INTR_DIS 0x0000
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/* RTL8211x PHY Interrupt Status Register */
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#define MIIM_RTL8211x_PHY_INSR 0x13
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/* RealTek RTL8211x */
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static int rtl8211x_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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/* mask interrupt at init; if the interrupt is
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* needed indeed, it should be explicitly enabled
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*/
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phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER,
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MIIM_RTL8211x_PHY_INTR_DIS);
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/* read interrupt status just to clear it */
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phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER);
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genphy_config_aneg(phydev);
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return 0;
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}
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static int rtl8211x_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_RTL8211x_PHY_STATUS);
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if (!(mii_reg & MIIM_RTL8211x_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_RTL8211x_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_RTL8211x_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_RTL8211x_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_RTL8211x_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_RTL8211x_PHYSTAT_SPEED);
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switch (speed) {
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case MIIM_RTL8211x_PHYSTAT_GBIT:
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phydev->speed = SPEED_1000;
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break;
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case MIIM_RTL8211x_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 rtl8211x_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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rtl8211x_parse_status(phydev);
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return 0;
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}
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/* Support for RTL8211B PHY */
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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 = 0xffffff,
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.features = PHY_GBIT_FEATURES,
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.config = &rtl8211x_config,
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.startup = &rtl8211x_startup,
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.shutdown = &genphy_shutdown,
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};
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/* Support for RTL8211E-VB-CG, RTL8211E-VL-CG and RTL8211EG-VB-CG PHYs */
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static struct phy_driver RTL8211E_driver = {
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.name = "RealTek RTL8211E",
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.uid = 0x1cc915,
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.mask = 0xffffff,
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.features = PHY_GBIT_FEATURES,
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.config = &rtl8211x_config,
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.startup = &rtl8211x_startup,
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.shutdown = &genphy_shutdown,
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};
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/* Support for RTL8211DN PHY */
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static struct phy_driver RTL8211DN_driver = {
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.name = "RealTek RTL8211DN",
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.uid = 0x1cc914,
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.mask = 0xffffff,
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.features = PHY_GBIT_FEATURES,
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.config = &rtl8211x_config,
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.startup = &rtl8211x_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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phy_register(&RTL8211E_driver);
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phy_register(&RTL8211DN_driver);
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return 0;
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}
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