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/*
* Marvell 88E6xxx SERDES manipulation, via SMI bus
*
* Copyright (c) 2008 Marvell Semiconductor
*
* Copyright (c) 2017 Andrew Lunn <andrew@lunn.ch>
*
* 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/mii.h>
#include "mv88e6xxx.h"
#include "phy.h"
#include "port.h"
#include "serdes.h"
static int mv88e6352_serdes_read(struct mv88e6xxx_chip *chip, int reg,
u16 *val)
{
return mv88e6xxx_phy_page_read(chip, MV88E6352_ADDR_SERDES,
MV88E6352_SERDES_PAGE_FIBER,
reg, val);
}
static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg,
u16 val)
{
return mv88e6xxx_phy_page_write(chip, MV88E6352_ADDR_SERDES,
MV88E6352_SERDES_PAGE_FIBER,
reg, val);
}
static int mv88e6352_serdes_power_set(struct mv88e6xxx_chip *chip, bool on)
{
u16 val, new_val;
int err;
err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
if (err)
return err;
if (on)
new_val = val & ~BMCR_PDOWN;
else
new_val = val | BMCR_PDOWN;
if (val != new_val)
err = mv88e6352_serdes_write(chip, MII_BMCR, new_val);
return err;
}
int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
{
int err;
u8 cmode;
err = mv88e6xxx_port_get_cmode(chip, port, &cmode);
if (err)
return err;
if ((cmode == PORT_STATUS_CMODE_100BASE_X) ||
(cmode == PORT_STATUS_CMODE_1000BASE_X) ||
(cmode == PORT_STATUS_CMODE_SGMII)) {
err = mv88e6352_serdes_power_set(chip, on);
if (err < 0)
return err;
}
return 0;
}
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