smsc.c

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/*
 * drivers/net/phy/smsc.c
 *
 * Driver for SMSC PHYs
 *
 * Author: Herbert Valerio Riedel
 *
 * Copyright (c) 2006 Herbert Valerio Riedel <[email protected]>
 *
 * 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.
 *
 * Support added for SMSC LAN8187 and LAN8700 by [email protected]
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
#include <linux/smscphy.h>

static int smsc_phy_config_intr(struct phy_device *phydev)
{
    int rc = phy_write (phydev, MII_LAN83C185_IM,
            ((PHY_INTERRUPT_ENABLED == phydev->interrupts)
            ? MII_LAN83C185_ISF_INT_PHYLIB_EVENTS
            : 0));

    return rc < 0 ? rc : 0;
}

static int smsc_phy_ack_interrupt(struct phy_device *phydev)
{
    int rc = phy_read (phydev, MII_LAN83C185_ISF);

    return rc < 0 ? rc : 0;
}

static int smsc_phy_config_init(struct phy_device *phydev)
{
    int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
    if (rc < 0)
        return rc;

    /* Enable energy detect mode for this SMSC Transceivers */
    rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS,
               rc | MII_LAN83C185_EDPWRDOWN);
    if (rc < 0)
        return rc;

    return smsc_phy_ack_interrupt (phydev);
}

static int lan87xx_config_init(struct phy_device *phydev)
{
    /*
     * Make sure the EDPWRDOWN bit is NOT set. Setting this bit on
     * LAN8710/LAN8720 PHY causes the PHY to misbehave, likely due
     * to a bug on the chip.
     *
     * When the system is powered on with the network cable being
     * disconnected all the way until after ifconfig ethX up is
     * issued for the LAN port with this PHY, connecting the cable
     * afterwards does not cause LINK change detection, while the
     * expected behavior is the Link UP being detected.
     */
    int rc = phy_read(phydev, MII_LAN83C185_CTRL_STATUS);
    if (rc < 0)
        return rc;

    rc &= ~MII_LAN83C185_EDPWRDOWN;

    rc = phy_write(phydev, MII_LAN83C185_CTRL_STATUS, rc);
    if (rc < 0)
        return rc;

    return smsc_phy_ack_interrupt(phydev);
}

static int lan911x_config_init(struct phy_device *phydev)
{
    return smsc_phy_ack_interrupt(phydev);
}

static struct phy_driver smsc_phy_driver[] = {
{
    .phy_id     = 0x0007c0a0, /* OUI=0x00800f, Model#=0x0a */
    .phy_id_mask    = 0xfffffff0,
    .name       = "SMSC LAN83C185",

    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause
                | SUPPORTED_Asym_Pause),
    .flags      = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,

    /* basic functions */
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .config_init    = smsc_phy_config_init,

    /* IRQ related */
    .ack_interrupt  = smsc_phy_ack_interrupt,
    .config_intr    = smsc_phy_config_intr,

    .suspend    = genphy_suspend,
    .resume     = genphy_resume,

    .driver     = { .owner = THIS_MODULE, }
}, {
    .phy_id     = 0x0007c0b0, /* OUI=0x00800f, Model#=0x0b */
    .phy_id_mask    = 0xfffffff0,
    .name       = "SMSC LAN8187",

    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause
                | SUPPORTED_Asym_Pause),
    .flags      = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,

    /* basic functions */
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .config_init    = smsc_phy_config_init,

    /* IRQ related */
    .ack_interrupt  = smsc_phy_ack_interrupt,
    .config_intr    = smsc_phy_config_intr,

    .suspend    = genphy_suspend,
    .resume     = genphy_resume,

    .driver     = { .owner = THIS_MODULE, }
}, {
    .phy_id     = 0x0007c0c0, /* OUI=0x00800f, Model#=0x0c */
    .phy_id_mask    = 0xfffffff0,
    .name       = "SMSC LAN8700",

    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause
                | SUPPORTED_Asym_Pause),
    .flags      = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,

    /* basic functions */
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .config_init    = smsc_phy_config_init,

    /* IRQ related */
    .ack_interrupt  = smsc_phy_ack_interrupt,
    .config_intr    = smsc_phy_config_intr,

    .suspend    = genphy_suspend,
    .resume     = genphy_resume,

    .driver     = { .owner = THIS_MODULE, }
}, {
    .phy_id     = 0x0007c0d0, /* OUI=0x00800f, Model#=0x0d */
    .phy_id_mask    = 0xfffffff0,
    .name       = "SMSC LAN911x Internal PHY",

    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause
                | SUPPORTED_Asym_Pause),
    .flags      = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,

    /* basic functions */
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .config_init    = lan911x_config_init,

    /* IRQ related */
    .ack_interrupt  = smsc_phy_ack_interrupt,
    .config_intr    = smsc_phy_config_intr,

    .suspend    = genphy_suspend,
    .resume     = genphy_resume,

    .driver     = { .owner = THIS_MODULE, }
}, {
    .phy_id     = 0x0007c0f0, /* OUI=0x00800f, Model#=0x0f */
    .phy_id_mask    = 0xfffffff0,
    .name       = "SMSC LAN8710/LAN8720",

    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause
                | SUPPORTED_Asym_Pause),
    .flags      = PHY_HAS_INTERRUPT | PHY_HAS_MAGICANEG,

    /* basic functions */
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .config_init    = lan87xx_config_init,

    /* IRQ related */
    .ack_interrupt  = smsc_phy_ack_interrupt,
    .config_intr    = smsc_phy_config_intr,

    .suspend    = genphy_suspend,
    .resume     = genphy_resume,

    .driver     = { .owner = THIS_MODULE, }
} };

static int __init smsc_init(void)
{
    return phy_drivers_register(smsc_phy_driver,
        ARRAY_SIZE(smsc_phy_driver));
}

static void __exit smsc_exit(void)
{
    return phy_drivers_unregister(smsc_phy_driver,
        ARRAY_SIZE(smsc_phy_driver));
}

MODULE_DESCRIPTION("SMSC PHY driver");
MODULE_AUTHOR("Herbert Valerio Riedel");
MODULE_LICENSE("GPL");

module_init(smsc_init);
module_exit(smsc_exit);

static struct mdio_device_id __maybe_unused smsc_tbl[] = {
    { 0x0007c0a0, 0xfffffff0 },
    { 0x0007c0b0, 0xfffffff0 },
    { 0x0007c0c0, 0xfffffff0 },
    { 0x0007c0d0, 0xfffffff0 },
    { 0x0007c0f0, 0xfffffff0 },
    { }
};

MODULE_DEVICE_TABLE(mdio, smsc_tbl);