drivers/net/phy/realtek.c

   1 /*
   2  * RealTek PHY drivers
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  *
   6  * Copyright 2010-2011, 2015 Freescale Semiconductor, Inc.
   7  * author Andy Fleming
   8  */
   9 #include <config.h>
  10 #include <common.h>
  11 #include <phy.h>
  12
  13 #define PHY_AUTONEGOTIATE_TIMEOUT 5000
  14
  15 /* RTL8211x PHY Status Register */
  16 #define MIIM_RTL8211x_PHY_STATUS       0x11
  17 #define MIIM_RTL8211x_PHYSTAT_SPEED    0xc000
  18 #define MIIM_RTL8211x_PHYSTAT_GBIT     0x8000
  19 #define MIIM_RTL8211x_PHYSTAT_100      0x4000
  20 #define MIIM_RTL8211x_PHYSTAT_DUPLEX   0x2000
  21 #define MIIM_RTL8211x_PHYSTAT_SPDDONE  0x0800
  22 #define MIIM_RTL8211x_PHYSTAT_LINK     0x0400
  23
  24 /* RTL8211x PHY Interrupt Enable Register */
  25 #define MIIM_RTL8211x_PHY_INER         0x12
  26 #define MIIM_RTL8211x_PHY_INTR_ENA     0x9f01
  27 #define MIIM_RTL8211x_PHY_INTR_DIS     0x0000
  28
  29 /* RTL8211x PHY Interrupt Status Register */
  30 #define MIIM_RTL8211x_PHY_INSR         0x13
  31
  32 /* RealTek RTL8211x */
  33 static int rtl8211x_config(struct phy_device *phydev)
  34 {
  35         phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, BMCR_RESET);
  36
  37         /* mask interrupt at init; if the interrupt is
  38          * needed indeed, it should be explicitly enabled
  39          */
  40         phy_write(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER,
  41                   MIIM_RTL8211x_PHY_INTR_DIS);
  42
  43         /* read interrupt status just to clear it */
  44         phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_INER);
  45
  46         genphy_config_aneg(phydev);
  47
  48         return 0;
  49 }
  50
  51 static int rtl8211x_parse_status(struct phy_device *phydev)
  52 {
  53         unsigned int speed;
  54         unsigned int mii_reg;
  55
  56         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_RTL8211x_PHY_STATUS);
  57
  58         if (!(mii_reg & MIIM_RTL8211x_PHYSTAT_SPDDONE)) {
  59                 int i = 0;
  60
  61                 /* in case of timeout ->link is cleared */
  62                 phydev->link = 1;
  63                 puts("Waiting for PHY realtime link");
  64                 while (!(mii_reg & MIIM_RTL8211x_PHYSTAT_SPDDONE)) {
  65                         /* Timeout reached ? */
  66                         if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
  67                                 puts(" TIMEOUT !\n");
  68                                 phydev->link = 0;
  69                                 break;
  70                         }
  71
  72                         if ((i++ % 1000) == 0)
  73                                 putc('.');
  74                         udelay(1000);   /* 1 ms */
  75                         mii_reg = phy_read(phydev, MDIO_DEVAD_NONE,
  76                                         MIIM_RTL8211x_PHY_STATUS);
  77                 }
  78                 puts(" done\n");
  79                 udelay(500000); /* another 500 ms (results in faster booting) */
  80         } else {
  81                 if (mii_reg & MIIM_RTL8211x_PHYSTAT_LINK)
  82                         phydev->link = 1;
  83                 else
  84                         phydev->link = 0;
  85         }
  86
  87         if (mii_reg & MIIM_RTL8211x_PHYSTAT_DUPLEX)
  88                 phydev->duplex = DUPLEX_FULL;
  89         else
  90                 phydev->duplex = DUPLEX_HALF;
  91
  92         speed = (mii_reg & MIIM_RTL8211x_PHYSTAT_SPEED);
  93
  94         switch (speed) {
  95         case MIIM_RTL8211x_PHYSTAT_GBIT:
  96                 phydev->speed = SPEED_1000;
  97                 break;
  98         case MIIM_RTL8211x_PHYSTAT_100:
  99                 phydev->speed = SPEED_100;
 100                 break;
 101         default:
 102                 phydev->speed = SPEED_10;
 103         }
 104
 105         return 0;
 106 }
 107
 108 static int rtl8211x_startup(struct phy_device *phydev)
 109 {
 110         /* Read the Status (2x to make sure link is right) */
 111         genphy_update_link(phydev);
 112         rtl8211x_parse_status(phydev);
 113
 114         return 0;
 115 }
 116
 117 /* Support for RTL8211B PHY */
 118 static struct phy_driver RTL8211B_driver = {
 119         .name = "RealTek RTL8211B",
 120         .uid = 0x1cc910,
 121         .mask = 0xffffff,
 122         .features = PHY_GBIT_FEATURES,
 123         .config = &rtl8211x_config,
 124         .startup = &rtl8211x_startup,
 125         .shutdown = &genphy_shutdown,
 126 };
 127
 128 /* Support for RTL8211E-VB-CG, RTL8211E-VL-CG and RTL8211EG-VB-CG PHYs */
 129 static struct phy_driver RTL8211E_driver = {
 130         .name = "RealTek RTL8211E",
 131         .uid = 0x1cc915,
 132         .mask = 0xffffff,
 133         .features = PHY_GBIT_FEATURES,
 134         .config = &rtl8211x_config,
 135         .startup = &rtl8211x_startup,
 136         .shutdown = &genphy_shutdown,
 137 };
 138
 139 /* Support for RTL8211DN PHY */
 140 static struct phy_driver RTL8211DN_driver = {
 141         .name = "RealTek RTL8211DN",
 142         .uid = 0x1cc914,
 143         .mask = 0xffffff,
 144         .features = PHY_GBIT_FEATURES,
 145         .config = &rtl8211x_config,
 146         .startup = &rtl8211x_startup,
 147         .shutdown = &genphy_shutdown,
 148 };
 149
 150 int phy_realtek_init(void)
 151 {
 152         phy_register(&RTL8211B_driver);
 153         phy_register(&RTL8211E_driver);
 154         phy_register(&RTL8211DN_driver);
 155
 156         return 0;
 157 }