ste10Xp.c

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/*
 * drivers/net/phy/ste10Xp.c
 *
 * Driver for STMicroelectronics STe10Xp PHYs
 *
 * Author: Giuseppe Cavallaro <[email protected]>
 *
 * Copyright (c) 2008 STMicroelectronics Limited
 *
 * 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/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/phy.h>

#define MII_XCIIS       0x11    /* Configuration Info IRQ & Status Reg */
#define MII_XIE         0x12    /* Interrupt Enable Register */
#define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */

#define STE101P_PHY_ID      0x00061c50
#define STE100P_PHY_ID          0x1c040011

static int ste10Xp_config_init(struct phy_device *phydev)
{
    int value, err;

    /* Software Reset PHY */
    value = phy_read(phydev, MII_BMCR);
    if (value < 0)
        return value;

    value |= BMCR_RESET;
    err = phy_write(phydev, MII_BMCR, value);
    if (err < 0)
        return err;

    do {
        value = phy_read(phydev, MII_BMCR);
    } while (value & BMCR_RESET);

    return 0;
}

static int ste10Xp_config_intr(struct phy_device *phydev)
{
    int err, value;

    if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
        /* Enable all STe101P interrupts (PR12) */
        err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);
        /* clear any pending interrupts */
        if (err == 0) {
            value = phy_read(phydev, MII_XCIIS);
            if (value < 0)
                err = value;
        }
    } else
        err = phy_write(phydev, MII_XIE, 0);

    return err;
}

static int ste10Xp_ack_interrupt(struct phy_device *phydev)
{
    int err = phy_read(phydev, MII_XCIIS);
    if (err < 0)
        return err;

    return 0;
}

static struct phy_driver ste10xp_pdriver[] = {
{
    .phy_id = STE101P_PHY_ID,
    .phy_id_mask = 0xfffffff0,
    .name = "STe101p",
    .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
    .flags = PHY_HAS_INTERRUPT,
    .config_init = ste10Xp_config_init,
    .config_aneg = genphy_config_aneg,
    .read_status = genphy_read_status,
    .ack_interrupt = ste10Xp_ack_interrupt,
    .config_intr = ste10Xp_config_intr,
    .suspend = genphy_suspend,
    .resume = genphy_resume,
    .driver = {.owner = THIS_MODULE,}
}, {
    .phy_id = STE100P_PHY_ID,
    .phy_id_mask = 0xffffffff,
    .name = "STe100p",
    .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
    .flags = PHY_HAS_INTERRUPT,
    .config_init = ste10Xp_config_init,
    .config_aneg = genphy_config_aneg,
    .read_status = genphy_read_status,
    .ack_interrupt = ste10Xp_ack_interrupt,
    .config_intr = ste10Xp_config_intr,
    .suspend = genphy_suspend,
    .resume = genphy_resume,
    .driver = {.owner = THIS_MODULE,}
} };

static int __init ste10Xp_init(void)
{
    return phy_drivers_register(ste10xp_pdriver,
        ARRAY_SIZE(ste10xp_pdriver));
}

static void __exit ste10Xp_exit(void)
{
    phy_drivers_unregister(ste10xp_pdriver,
        ARRAY_SIZE(ste10xp_pdriver));
}

module_init(ste10Xp_init);
module_exit(ste10Xp_exit);

static struct mdio_device_id __maybe_unused ste10Xp_tbl[] = {
    { STE101P_PHY_ID, 0xfffffff0 },
    { STE100P_PHY_ID, 0xffffffff },
    { }
};

MODULE_DEVICE_TABLE(mdio, ste10Xp_tbl);

MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
MODULE_AUTHOR("Giuseppe Cavallaro <[email protected]>");
MODULE_LICENSE("GPL");