117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
/*
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* drivers/net/phy/realtek.c
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*
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* Driver for Realtek PHYs
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*
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* Author: Johnson Leung <r58129@freescale.com>
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*
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* Copyright (c) 2004 Freescale Semiconductor, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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*/
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#include <linux/phy.h>
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#define RTL821x_PHYSR 0x11
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#define RTL821x_PHYSR_DUPLEX 0x2000
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#define RTL821x_PHYSR_SPEED 0xc000
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#define RTL821x_INER 0x12
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#define RTL821x_INER_INIT 0x0400
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#define RTL821x_INSR 0x13
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#define RTL821x_PHYCR 0x10
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MODULE_DESCRIPTION("Realtek PHY driver");
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MODULE_AUTHOR("Johnson Leung");
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MODULE_LICENSE("GPL");
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static int rtl821x_ack_interrupt(struct phy_device *phydev)
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{
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int err;
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err = phy_read(phydev, RTL821x_INSR);
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return (err < 0) ? err : 0;
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}
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static int rtl821x_config_intr(struct phy_device *phydev)
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{
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int err;
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if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
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err = phy_write(phydev, RTL821x_INER,
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RTL821x_INER_INIT);
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else
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err = phy_write(phydev, RTL821x_INER, 0);
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return err;
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}
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int rtl821x_read_status(struct phy_device *phydev)
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{
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int result = genphy_read_status(phydev);
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if (!result)
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{
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int value;
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value = phy_read(phydev, RTL821x_INSR);
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if (value&(1<<8))
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{
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/* false carrier detected - restarting auto negotiation */
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genphy_restart_aneg(phydev);
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}
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value = phy_read(phydev, RTL821x_PHYCR);
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if (phydev->speed == SPEED_1000)
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{
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if (value&(1<<4))
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{
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// switch on the clock
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value &= ~(1<<4);
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phy_write(phydev, RTL821x_PHYCR, value);
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}
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}
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else if ((value&(1<<4)) == 0)
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{
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// switch on the clock
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value |= (1<<4);
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phy_write(phydev, RTL821x_PHYCR, value);
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}
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}
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return result;
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}
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/* RTL8211B */
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static struct phy_driver rtl821x_driver = {
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.phy_id = 0x001cc910,
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.name = "RTL821x Gigabit Ethernet",
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.phy_id_mask = 0x001ffff0,
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.features = PHY_GBIT_FEATURES,
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.flags = PHY_HAS_INTERRUPT,
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.config_aneg = &genphy_config_aneg,
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.read_status = &rtl821x_read_status,
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.ack_interrupt = &rtl821x_ack_interrupt,
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.config_intr = &rtl821x_config_intr,
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.driver = { .owner = THIS_MODULE,},
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};
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static int __init realtek_init(void)
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{
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int ret;
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ret = phy_driver_register(&rtl821x_driver);
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return ret;
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}
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static void __exit realtek_exit(void)
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{
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phy_driver_unregister(&rtl821x_driver);
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}
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module_init(realtek_init);
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module_exit(realtek_exit);
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