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/*
* Copyright 2017 NXP
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/netdevice.h>
#include <linux/phy.h>
#include "fec.h"
#define PHY_ID_AR8031 0x004dd074
static int ar8031_phy_fixup(struct phy_device *dev)
{
u16 val;
/* Set RGMII IO voltage to 1.8V */
phy_write(dev, 0x1d, 0x1f);
phy_write(dev, 0x1e, 0x8);
/* Disable phy AR8031 SmartEEE function */
phy_write(dev, 0xd, 0x3);
phy_write(dev, 0xe, 0x805d);
phy_write(dev, 0xd, 0x4003);
val = phy_read(dev, 0xe);
val &= ~(0x1 << 8);
phy_write(dev, 0xe, val);
/* Introduce tx clock delay */
phy_write(dev, 0x1d, 0x5);
phy_write(dev, 0x1e, 0x100);
return 0;
}
void fec_enet_register_fixup(struct net_device *ndev)
{
struct fec_enet_private *fep = netdev_priv(ndev);
static int registered = 0;
int err;
if (!IS_BUILTIN(CONFIG_PHYLIB))
return;
if (fep->fixups & FEC_QUIRK_AR8031_FIXUP) {
static int ar8031_registered = 0;
if (ar8031_registered)
return;
err = phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffef,
ar8031_phy_fixup);
if (err)
netdev_info(ndev, "Cannot register PHY board fixup\n");
registered = 1;
}
}
int of_fec_enet_parse_fixup(struct device_node *np)
{
int fixups = 0;
if (of_get_property(np, "fsl,ar8031-phy-fixup", NULL))
fixups |= FEC_QUIRK_AR8031_FIXUP;
return fixups;
}
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