cicada.c

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/*
 * drivers/net/phy/cicada.c
 *
 * Driver for Cicada PHYs
 *
 * Author: Andy Fleming
 *
 * Copyright (c) 2004 Freescale Semiconductor, Inc.
 *
 * 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 <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>

/* Cicada Extended Control Register 1 */
#define MII_CIS8201_EXT_CON1           0x17
#define MII_CIS8201_EXTCON1_INIT       0x0000

/* Cicada Interrupt Mask Register */
#define MII_CIS8201_IMASK       0x19
#define MII_CIS8201_IMASK_IEN       0x8000
#define MII_CIS8201_IMASK_SPEED 0x4000
#define MII_CIS8201_IMASK_LINK      0x2000
#define MII_CIS8201_IMASK_DUPLEX    0x1000
#define MII_CIS8201_IMASK_MASK      0xf000

/* Cicada Interrupt Status Register */
#define MII_CIS8201_ISTAT       0x1a
#define MII_CIS8201_ISTAT_STATUS    0x8000
#define MII_CIS8201_ISTAT_SPEED 0x4000
#define MII_CIS8201_ISTAT_LINK      0x2000
#define MII_CIS8201_ISTAT_DUPLEX    0x1000

/* Cicada Auxiliary Control/Status Register */
#define MII_CIS8201_AUX_CONSTAT        0x1c
#define MII_CIS8201_AUXCONSTAT_INIT    0x0004
#define MII_CIS8201_AUXCONSTAT_DUPLEX  0x0020
#define MII_CIS8201_AUXCONSTAT_SPEED   0x0018
#define MII_CIS8201_AUXCONSTAT_GBIT    0x0010
#define MII_CIS8201_AUXCONSTAT_100     0x0008

MODULE_DESCRIPTION("Cicadia PHY driver");
MODULE_AUTHOR("Andy Fleming");
MODULE_LICENSE("GPL");

static int cis820x_config_init(struct phy_device *phydev)
{
    int err;

    err = phy_write(phydev, MII_CIS8201_AUX_CONSTAT,
            MII_CIS8201_AUXCONSTAT_INIT);

    if (err < 0)
        return err;

    err = phy_write(phydev, MII_CIS8201_EXT_CON1,
            MII_CIS8201_EXTCON1_INIT);

    return err;
}

static int cis820x_ack_interrupt(struct phy_device *phydev)
{
    int err = phy_read(phydev, MII_CIS8201_ISTAT);

    return (err < 0) ? err : 0;
}

static int cis820x_config_intr(struct phy_device *phydev)
{
    int err;

    if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
        err = phy_write(phydev, MII_CIS8201_IMASK, 
                MII_CIS8201_IMASK_MASK);
    else
        err = phy_write(phydev, MII_CIS8201_IMASK, 0);

    return err;
}

/* Cicada 8201, a.k.a Vitesse VSC8201 */
static struct phy_driver cis820x_driver[] = {
{
    .phy_id     = 0x000fc410,
    .name       = "Cicada Cis8201",
    .phy_id_mask    = 0x000ffff0,
    .features   = PHY_GBIT_FEATURES,
    .flags      = PHY_HAS_INTERRUPT,
    .config_init    = &cis820x_config_init,
    .config_aneg    = &genphy_config_aneg,
    .read_status    = &genphy_read_status,
    .ack_interrupt  = &cis820x_ack_interrupt,
    .config_intr    = &cis820x_config_intr,
    .driver     = { .owner = THIS_MODULE,},
}, {
    .phy_id     = 0x000fc440,
    .name       = "Cicada Cis8204",
    .phy_id_mask    = 0x000fffc0,
    .features   = PHY_GBIT_FEATURES,
    .flags      = PHY_HAS_INTERRUPT,
    .config_init    = &cis820x_config_init,
    .config_aneg    = &genphy_config_aneg,
    .read_status    = &genphy_read_status,
    .ack_interrupt  = &cis820x_ack_interrupt,
    .config_intr    = &cis820x_config_intr,
    .driver     = { .owner = THIS_MODULE,},
} };

static int __init cicada_init(void)
{
    return phy_drivers_register(cis820x_driver,
        ARRAY_SIZE(cis820x_driver));
}

static void __exit cicada_exit(void)
{
    phy_drivers_unregister(cis820x_driver,
        ARRAY_SIZE(cis820x_driver));
}

module_init(cicada_init);
module_exit(cicada_exit);

static struct mdio_device_id __maybe_unused cicada_tbl[] = {
    { 0x000fc410, 0x000ffff0 },
    { 0x000fc440, 0x000fffc0 },
    { }
};

MODULE_DEVICE_TABLE(mdio, cicada_tbl);