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// SPDX-License-Identifier: GPL-2.0+
/*
* Driver for Broadcom 89xxx 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.
*
* Copyright 2015 Freescale Semiconductor, Inc.
*
*/
#include <linux/module.h>
#include <linux/phy.h>
#define MII_BCM89XXX_IR 0x1b /* interrupt register */
#define MII_BCM89XXX_IR_DUPLEX 0x0003 /* duplex changed */
#define MII_BCM89XXX_IR_SPEED 0x0002 /* speed changed */
#define MII_BCM89XXX_IR_LINK 0x0001 /* link changed */
MODULE_DESCRIPTION("Broadcom 89xxx internal PHY driver");
MODULE_AUTHOR("Stoica Cosmin-Stefan <cosminstefan.stoica@freescale.com>");
MODULE_LICENSE("GPL");
static int bcm89xxx_config_init(struct phy_device *phydev)
{
int reg;
reg = phy_read(phydev, MII_BCM89XXX_IR);
if (reg < 0)
return reg;
/* Unmask events we are interested in */
reg = ~(MII_BCM89XXX_IR_DUPLEX |
MII_BCM89XXX_IR_SPEED |
MII_BCM89XXX_IR_LINK);
return phy_write(phydev, MII_BCM89XXX_IR, reg);
}
static int bcm89xxx_ack_interrupt(struct phy_device *phydev)
{
int reg;
/* Clear pending interrupts. */
reg = phy_read(phydev, MII_BCM89XXX_IR);
if (reg < 0)
return reg;
return 0;
}
static int bcm89xxx_config_intr(struct phy_device *phydev)
{
int reg, err;
reg = phy_read(phydev, MII_BCM89XXX_IR);
if (reg < 0)
return reg;
if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
reg &= ~0xFFFF;
err = phy_write(phydev, MII_BCM89XXX_IR, reg);
return err;
}
static struct phy_driver bcm89xxx_driver[] = {
{
.phy_id = 0x03625cde,
.phy_id_mask = 0xfffffff0,
.name = "Broadcom BCM89XXX (1)",
/* ASYM_PAUSE bit is marked RO in datasheet, so don't cheat */
.features = PHY_GBIT_FEATURES,
.flags = PHY_IS_INTERNAL,
.config_init = bcm89xxx_config_init,
.config_aneg = genphy_config_aneg,
.read_status = genphy_read_status,
.ack_interrupt = bcm89xxx_ack_interrupt,
.config_intr = bcm89xxx_config_intr,
}
};
static int __init bcm89xxx_phy_init(void)
{
return phy_drivers_register(bcm89xxx_driver,
ARRAY_SIZE(bcm89xxx_driver),
THIS_MODULE);
}
static void __exit bcm89xxx_phy_exit(void)
{
phy_drivers_unregister(bcm89xxx_driver,
ARRAY_SIZE(bcm89xxx_driver));
}
module_init(bcm89xxx_phy_init);
module_exit(bcm89xxx_phy_exit);
static struct mdio_device_id __maybe_unused bcm89xxx_tbl[] = {
{ 0x03625cde, 0xfffffff0 },
{ }
};
MODULE_DEVICE_TABLE(mdio, bcm89xxx_tbl);
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