drivers/net/phy/realtek.c

   1 /*
   2  * drivers/net/phy/realtek.c
   3  *
   4  * Driver for Realtek PHYs
   5  *
   6  * Author: Johnson Leung <r58129@freescale.com>
   7  *
   8  * Copyright (c) 2004 Freescale Semiconductor, Inc.
   9  *
  10  * This program is free software; you can redistribute  it and/or modify it
  11  * under  the terms of  the GNU General  Public License as published by the
  12  * Free Software Foundation;  either version 2 of the  License, or (at your
  13  * option) any later version.
  14  *
  15  */
  16 #include <linux/phy.h>
  17 #include <linux/module.h>
  18
  19 #define RTL821x_PHYSR           0x11
  20 #define RTL821x_PHYSR_DUPLEX    0x2000
  21 #define RTL821x_PHYSR_SPEED     0xc000
  22 #define RTL821x_INER            0x12
  23 #define RTL821x_INER_INIT       0x6400
  24 #define RTL821x_INSR            0x13
  25 #define RTL8211E_INER_LINK_STATUS 0x400
  26
  27 #define RTL8211F_INER_LINK_STATUS 0x0010
  28 #define RTL8211F_INSR           0x1d
  29 #define RTL8211F_PAGE_SELECT    0x1f
  30 #define RTL8211F_TX_DELAY       0x100
  31
  32 MODULE_DESCRIPTION("Realtek PHY driver");
  33 MODULE_AUTHOR("Johnson Leung");
  34 MODULE_LICENSE("GPL");
  35
  36 static int rtl821x_ack_interrupt(struct phy_device *phydev)
  37 {
  38         int err;
  39
  40         err = phy_read(phydev, RTL821x_INSR);
  41
  42         return (err < 0) ? err : 0;
  43 }
  44
  45 static int rtl8211f_ack_interrupt(struct phy_device *phydev)
  46 {
  47         int err;
  48
  49         phy_write(phydev, RTL8211F_PAGE_SELECT, 0xa43);
  50         err = phy_read(phydev, RTL8211F_INSR);
  51         /* restore to default page 0 */
  52         phy_write(phydev, RTL8211F_PAGE_SELECT, 0x0);
  53
  54         return (err < 0) ? err : 0;
  55 }
  56
  57 static int rtl8211b_config_intr(struct phy_device *phydev)
  58 {
  59         int err;
  60
  61         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  62                 err = phy_write(phydev, RTL821x_INER,
  63                                 RTL821x_INER_INIT);
  64         else
  65                 err = phy_write(phydev, RTL821x_INER, 0);
  66
  67         return err;
  68 }
  69
  70 static int rtl8211e_config_intr(struct phy_device *phydev)
  71 {
  72         int err;
  73
  74         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  75                 err = phy_write(phydev, RTL821x_INER,
  76                                 RTL8211E_INER_LINK_STATUS);
  77         else
  78                 err = phy_write(phydev, RTL821x_INER, 0);
  79
  80         return err;
  81 }
  82
  83 static int rtl8211f_config_intr(struct phy_device *phydev)
  84 {
  85         int err;
  86
  87         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  88                 err = phy_write(phydev, RTL821x_INER,
  89                                 RTL8211F_INER_LINK_STATUS);
  90         else
  91                 err = phy_write(phydev, RTL821x_INER, 0);
  92
  93         return err;
  94 }
  95
  96 static int rtl8211f_config_init(struct phy_device *phydev)
  97 {
  98         int ret;
  99         u16 reg;
 100
 101         ret = genphy_config_init(phydev);
 102         if (ret < 0)
 103                 return ret;
 104
 105         phy_write(phydev, RTL8211F_PAGE_SELECT, 0xd08);
 106         reg = phy_read(phydev, 0x11);
 107
 108         /* enable TX-delay for rgmii-id and rgmii-txid, otherwise disable it */
 109         if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 110             phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
 111                 reg |= RTL8211F_TX_DELAY;
 112         else
 113                 reg &= ~RTL8211F_TX_DELAY;
 114
 115         phy_write(phydev, 0x11, reg);
 116         /* restore to default page 0 */
 117         phy_write(phydev, RTL8211F_PAGE_SELECT, 0x0);
 118
 119         return 0;
 120 }
 121
 122 static struct phy_driver realtek_drvs[] = {
 123         {
 124                 .phy_id         = 0x00008201,
 125                 .name           = "RTL8201CP Ethernet",
 126                 .phy_id_mask    = 0x0000ffff,
 127                 .features       = PHY_BASIC_FEATURES,
 128                 .flags          = PHY_HAS_INTERRUPT,
 129                 .config_aneg    = &genphy_config_aneg,
 130                 .read_status    = &genphy_read_status,
 131         }, {
 132                 .phy_id         = 0x001cc912,
 133                 .name           = "RTL8211B Gigabit Ethernet",
 134                 .phy_id_mask    = 0x001fffff,
 135                 .features       = PHY_GBIT_FEATURES,
 136                 .flags          = PHY_HAS_INTERRUPT,
 137                 .config_aneg    = &genphy_config_aneg,
 138                 .read_status    = &genphy_read_status,
 139                 .ack_interrupt  = &rtl821x_ack_interrupt,
 140                 .config_intr    = &rtl8211b_config_intr,
 141         }, {
 142                 .phy_id         = 0x001cc914,
 143                 .name           = "RTL8211DN Gigabit Ethernet",
 144                 .phy_id_mask    = 0x001fffff,
 145                 .features       = PHY_GBIT_FEATURES,
 146                 .flags          = PHY_HAS_INTERRUPT,
 147                 .config_aneg    = genphy_config_aneg,
 148                 .read_status    = genphy_read_status,
 149                 .ack_interrupt  = rtl821x_ack_interrupt,
 150                 .config_intr    = rtl8211e_config_intr,
 151                 .suspend        = genphy_suspend,
 152                 .resume         = genphy_resume,
 153         }, {
 154                 .phy_id         = 0x001cc915,
 155                 .name           = "RTL8211E Gigabit Ethernet",
 156                 .phy_id_mask    = 0x001fffff,
 157                 .features       = PHY_GBIT_FEATURES,
 158                 .flags          = PHY_HAS_INTERRUPT,
 159                 .config_aneg    = &genphy_config_aneg,
 160                 .read_status    = &genphy_read_status,
 161                 .ack_interrupt  = &rtl821x_ack_interrupt,
 162                 .config_intr    = &rtl8211e_config_intr,
 163                 .suspend        = genphy_suspend,
 164                 .resume         = genphy_resume,
 165         }, {
 166                 .phy_id         = 0x001cc916,
 167                 .name           = "RTL8211F Gigabit Ethernet",
 168                 .phy_id_mask    = 0x001fffff,
 169                 .features       = PHY_GBIT_FEATURES,
 170                 .flags          = PHY_HAS_INTERRUPT,
 171                 .config_aneg    = &genphy_config_aneg,
 172                 .config_init    = &rtl8211f_config_init,
 173                 .read_status    = &genphy_read_status,
 174                 .ack_interrupt  = &rtl8211f_ack_interrupt,
 175                 .config_intr    = &rtl8211f_config_intr,
 176                 .suspend        = genphy_suspend,
 177                 .resume         = genphy_resume,
 178         },
 179 };
 180
 181 module_phy_driver(realtek_drvs);
 182
 183 static struct mdio_device_id __maybe_unused realtek_tbl[] = {
 184         { 0x001cc912, 0x001fffff },
 185         { 0x001cc914, 0x001fffff },
 186         { 0x001cc915, 0x001fffff },
 187         { 0x001cc916, 0x001fffff },
 188         { }
 189 };
 190
 191 MODULE_DEVICE_TABLE(mdio, realtek_tbl);