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
  26 MODULE_DESCRIPTION("Realtek PHY driver");
  27 MODULE_AUTHOR("Johnson Leung");
  28 MODULE_LICENSE("GPL");
  29
  30 static int rtl821x_ack_interrupt(struct phy_device *phydev)
  31 {
  32         int err;
  33
  34         err = phy_read(phydev, RTL821x_INSR);
  35
  36         return (err < 0) ? err : 0;
  37 }
  38
  39 static int rtl821x_config_intr(struct phy_device *phydev)
  40 {
  41         int err;
  42
  43         if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
  44                 err = phy_write(phydev, RTL821x_INER,
  45                                 RTL821x_INER_INIT);
  46         else
  47                 err = phy_write(phydev, RTL821x_INER, 0);
  48
  49         return err;
  50 }
  51
  52 /* RTL8211B */
  53 static struct phy_driver rtl821x_driver = {
  54         .phy_id         = 0x001cc912,
  55         .name           = "RTL821x Gigabit Ethernet",
  56         .phy_id_mask    = 0x001fffff,
  57         .features       = PHY_GBIT_FEATURES,
  58         .flags          = PHY_HAS_INTERRUPT,
  59         .config_aneg    = &genphy_config_aneg,
  60         .read_status    = &genphy_read_status,
  61         .ack_interrupt  = &rtl821x_ack_interrupt,
  62         .config_intr    = &rtl821x_config_intr,
  63         .driver         = { .owner = THIS_MODULE,},
  64 };
  65
  66 static int __init realtek_init(void)
  67 {
  68         int ret;
  69
  70         ret = phy_driver_register(&rtl821x_driver);
  71
  72         return ret;
  73 }
  74
  75 static void __exit realtek_exit(void)
  76 {
  77         phy_driver_unregister(&rtl821x_driver);
  78 }
  79
  80 module_init(realtek_init);
  81 module_exit(realtek_exit);
  82
  83 static struct mdio_device_id __maybe_unused realtek_tbl[] = {
  84         { 0x001cc912, 0x001fffff },
  85         { }
  86 };
  87
  88 MODULE_DEVICE_TABLE(mdio, realtek_tbl);