bcm63xx.c

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/*
 *  Driver for Broadcom 63xx SOCs integrated PHYs
 *
 *  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/phy.h>

#define MII_BCM63XX_IR      0x1a    /* interrupt register */
#define MII_BCM63XX_IR_EN   0x4000  /* global interrupt enable */
#define MII_BCM63XX_IR_DUPLEX   0x0800  /* duplex changed */
#define MII_BCM63XX_IR_SPEED    0x0400  /* speed changed */
#define MII_BCM63XX_IR_LINK 0x0200  /* link changed */
#define MII_BCM63XX_IR_GMASK    0x0100  /* global interrupt mask */

MODULE_DESCRIPTION("Broadcom 63xx internal PHY driver");
MODULE_AUTHOR("Maxime Bizon <[email protected]>");
MODULE_LICENSE("GPL");

static int bcm63xx_config_init(struct phy_device *phydev)
{
    int reg, err;

    reg = phy_read(phydev, MII_BCM63XX_IR);
    if (reg < 0)
        return reg;

    /* Mask interrupts globally.  */
    reg |= MII_BCM63XX_IR_GMASK;
    err = phy_write(phydev, MII_BCM63XX_IR, reg);
    if (err < 0)
        return err;

    /* Unmask events we are interested in  */
    reg = ~(MII_BCM63XX_IR_DUPLEX |
        MII_BCM63XX_IR_SPEED |
        MII_BCM63XX_IR_LINK) |
        MII_BCM63XX_IR_EN;
    return phy_write(phydev, MII_BCM63XX_IR, reg);
}

static int bcm63xx_ack_interrupt(struct phy_device *phydev)
{
    int reg;

    /* Clear pending interrupts.  */
    reg = phy_read(phydev, MII_BCM63XX_IR);
    if (reg < 0)
        return reg;

    return 0;
}

static int bcm63xx_config_intr(struct phy_device *phydev)
{
    int reg, err;

    reg = phy_read(phydev, MII_BCM63XX_IR);
    if (reg < 0)
        return reg;

    if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
        reg &= ~MII_BCM63XX_IR_GMASK;
    else
        reg |= MII_BCM63XX_IR_GMASK;

    err = phy_write(phydev, MII_BCM63XX_IR, reg);
    return err;
}

static struct phy_driver bcm63xx_driver[] = {
{
    .phy_id     = 0x00406000,
    .phy_id_mask    = 0xfffffc00,
    .name       = "Broadcom BCM63XX (1)",
    /* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
    .flags      = PHY_HAS_INTERRUPT,
    .config_init    = bcm63xx_config_init,
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .ack_interrupt  = bcm63xx_ack_interrupt,
    .config_intr    = bcm63xx_config_intr,
    .driver     = { .owner = THIS_MODULE },
}, {
    /* same phy as above, with just a different OUI */
    .phy_id     = 0x002bdc00,
    .phy_id_mask    = 0xfffffc00,
    .name       = "Broadcom BCM63XX (2)",
    .features   = (PHY_BASIC_FEATURES | SUPPORTED_Pause),
    .flags      = PHY_HAS_INTERRUPT,
    .config_init    = bcm63xx_config_init,
    .config_aneg    = genphy_config_aneg,
    .read_status    = genphy_read_status,
    .ack_interrupt  = bcm63xx_ack_interrupt,
    .config_intr    = bcm63xx_config_intr,
    .driver     = { .owner = THIS_MODULE },
} };

static int __init bcm63xx_phy_init(void)
{
    return phy_drivers_register(bcm63xx_driver,
        ARRAY_SIZE(bcm63xx_driver));
}

static void __exit bcm63xx_phy_exit(void)
{
    phy_drivers_unregister(bcm63xx_driver,
        ARRAY_SIZE(bcm63xx_driver));
}

module_init(bcm63xx_phy_init);
module_exit(bcm63xx_phy_exit);

static struct mdio_device_id __maybe_unused bcm63xx_tbl[] = {
    { 0x00406000, 0xfffffc00 },
    { 0x002bdc00, 0xfffffc00 },
    { }
};

MODULE_DEVICE_TABLE(mdio, bcm63xx_tbl);