76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
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/*
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* Marvell 88E6xxx SERDES manipulation, via SMI bus
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*
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* Copyright (c) 2008 Marvell Semiconductor
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*
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* Copyright (c) 2017 Andrew Lunn <andrew@lunn.ch>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/mii.h>
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#include "mv88e6xxx.h"
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#include "phy.h"
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#include "port.h"
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#include "serdes.h"
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static int mv88e6352_serdes_read(struct mv88e6xxx_chip *chip, int reg,
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u16 *val)
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{
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return mv88e6xxx_phy_page_read(chip, MV88E6352_ADDR_SERDES,
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MV88E6352_SERDES_PAGE_FIBER,
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reg, val);
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}
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static int mv88e6352_serdes_write(struct mv88e6xxx_chip *chip, int reg,
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u16 val)
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{
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return mv88e6xxx_phy_page_write(chip, MV88E6352_ADDR_SERDES,
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MV88E6352_SERDES_PAGE_FIBER,
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reg, val);
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}
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static int mv88e6352_serdes_power_set(struct mv88e6xxx_chip *chip, bool on)
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{
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u16 val, new_val;
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int err;
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err = mv88e6352_serdes_read(chip, MII_BMCR, &val);
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if (err)
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return err;
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if (on)
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new_val = val & ~BMCR_PDOWN;
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else
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new_val = val | BMCR_PDOWN;
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if (val != new_val)
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err = mv88e6352_serdes_write(chip, MII_BMCR, new_val);
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return err;
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}
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int mv88e6352_serdes_power(struct mv88e6xxx_chip *chip, int port, bool on)
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{
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int err;
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u8 cmode;
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err = mv88e6xxx_port_get_cmode(chip, port, &cmode);
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if (err)
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return err;
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if ((cmode == PORT_STATUS_CMODE_100BASE_X) ||
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(cmode == PORT_STATUS_CMODE_1000BASE_X) ||
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(cmode == PORT_STATUS_CMODE_SGMII)) {
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err = mv88e6352_serdes_power_set(chip, on);
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if (err < 0)
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return err;
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}
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return 0;
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}
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