4 * SPDX-License-Identifier: GPL-2.0+
6 * Copyright 2010-2011 Freescale Semiconductor, Inc.
13 #define PHY_AUTONEGOTIATE_TIMEOUT 5000
15 /* RTL8211B PHY Status Register */
16 #define MIIM_RTL8211B_PHY_STATUS 0x11
17 #define MIIM_RTL8211B_PHYSTAT_SPEED 0xc000
18 #define MIIM_RTL8211B_PHYSTAT_GBIT 0x8000
19 #define MIIM_RTL8211B_PHYSTAT_100 0x4000
20 #define MIIM_RTL8211B_PHYSTAT_DUPLEX 0x2000
21 #define MIIM_RTL8211B_PHYSTAT_SPDDONE 0x0800
22 #define MIIM_RTL8211B_PHYSTAT_LINK 0x0400
25 /* RealTek RTL8211B */
26 static int rtl8211b_config(struct phy_device *phydev)
28 phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);
30 genphy_config_aneg(phydev);
35 static int rtl8211b_parse_status(struct phy_device *phydev)
40 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211B_PHY_STATUS);
42 if (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
45 /* in case of timeout ->link is cleared */
47 puts("Waiting for PHY realtime link");
48 while (!(mii_reg & MIIM_RTL8211B_PHYSTAT_SPDDONE)) {
49 /* Timeout reached ? */
50 if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
56 if ((i++ % 1000) == 0)
58 udelay(1000); /* 1 ms */
59 mii_reg = phy_read(phydev, MDIO_DEVAD_NONE,
60 MIIM_RTL8211B_PHY_STATUS);
63 udelay(500000); /* another 500 ms (results in faster booting) */
65 if (mii_reg & MIIM_RTL8211B_PHYSTAT_LINK)
71 if (mii_reg & MIIM_RTL8211B_PHYSTAT_DUPLEX)
72 phydev->duplex = DUPLEX_FULL;
74 phydev->duplex = DUPLEX_HALF;
76 speed = (mii_reg & MIIM_RTL8211B_PHYSTAT_SPEED);
79 case MIIM_RTL8211B_PHYSTAT_GBIT:
80 phydev->speed = SPEED_1000;
82 case MIIM_RTL8211B_PHYSTAT_100:
83 phydev->speed = SPEED_100;
86 phydev->speed = SPEED_10;
92 static int rtl8211b_startup(struct phy_device *phydev)
94 /* Read the Status (2x to make sure link is right) */
95 genphy_update_link(phydev);
96 rtl8211b_parse_status(phydev);
101 static struct phy_driver RTL8211B_driver = {
102 .name = "RealTek RTL8211B",
105 .features = PHY_GBIT_FEATURES,
106 .config = &rtl8211b_config,
107 .startup = &rtl8211b_startup,
108 .shutdown = &genphy_shutdown,
111 int phy_realtek_init(void)
113 phy_register(&RTL8211B_driver);