et1011c.c

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/*
 * drivers/net/phy/et1011c.c
 *
 * Driver for LSI ET1011C PHYs
 *
 * Author: Chaithrika U S
 *
 * Copyright (c) 2008 Texas Instruments
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/unistd.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/irq.h>

#define ET1011C_STATUS_REG  (0x1A)
#define ET1011C_CONFIG_REG  (0x16)
#define ET1011C_SPEED_MASK      (0x0300)
#define ET1011C_GIGABIT_SPEED       (0x0200)
#define ET1011C_TX_FIFO_MASK        (0x3000)
#define ET1011C_TX_FIFO_DEPTH_8     (0x0000)
#define ET1011C_TX_FIFO_DEPTH_16    (0x1000)
#define ET1011C_INTERFACE_MASK      (0x0007)
#define ET1011C_GMII_INTERFACE      (0x0002)
#define ET1011C_SYS_CLK_EN      (0x01 << 4)


MODULE_DESCRIPTION("LSI ET1011C PHY driver");
MODULE_AUTHOR("Chaithrika U S");
MODULE_LICENSE("GPL");

static int et1011c_config_aneg(struct phy_device *phydev)
{
    int ctl = 0;
    ctl = phy_read(phydev, MII_BMCR);
    if (ctl < 0)
        return ctl;
    ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 |
         BMCR_ANENABLE);
    /* First clear the PHY */
    phy_write(phydev, MII_BMCR, ctl | BMCR_RESET);

    return genphy_config_aneg(phydev);
}

static int et1011c_read_status(struct phy_device *phydev)
{
    int ret;
    u32 val;
    static int speed;
    ret = genphy_read_status(phydev);

    if (speed != phydev->speed) {
        speed = phydev->speed;
        val = phy_read(phydev, ET1011C_STATUS_REG);
        if ((val & ET1011C_SPEED_MASK) ==
                    ET1011C_GIGABIT_SPEED) {
            val = phy_read(phydev, ET1011C_CONFIG_REG);
            val &= ~ET1011C_TX_FIFO_MASK;
            phy_write(phydev, ET1011C_CONFIG_REG, val\
                    | ET1011C_GMII_INTERFACE\
                    | ET1011C_SYS_CLK_EN\
                    | ET1011C_TX_FIFO_DEPTH_16);

        }
    }
    return ret;
}

static struct phy_driver et1011c_driver = {
    .phy_id     = 0x0282f014,
    .name       = "ET1011C",
    .phy_id_mask    = 0xfffffff0,
    .features   = (PHY_BASIC_FEATURES | SUPPORTED_1000baseT_Full),
    .flags      = PHY_POLL,
    .config_aneg    = et1011c_config_aneg,
    .read_status    = et1011c_read_status,
    .driver     = { .owner = THIS_MODULE,},
};

static int __init et1011c_init(void)
{
    return phy_driver_register(&et1011c_driver);
}

static void __exit et1011c_exit(void)
{
    phy_driver_unregister(&et1011c_driver);
}

module_init(et1011c_init);
module_exit(et1011c_exit);

static struct mdio_device_id __maybe_unused et1011c_tbl[] = {
    { 0x0282f014, 0xfffffff0 },
    { }
};

MODULE_DEVICE_TABLE(mdio, et1011c_tbl);