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/*
* Driver for Teranetics PHY
*
* Author: Shaohui Xie <Shaohui.Xie@freescale.com>
*
* Copyright 2015 Freescale Semiconductor, Inc.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mii.h>
#include <linux/ethtool.h>
#include <linux/mdio.h>
#include <linux/phy.h>
MODULE_DESCRIPTION("Teranetics PHY driver");
MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
MODULE_LICENSE("GPL v2");
#define PHY_ID_TN2020 0x00a19410
#define MDIO_PHYXS_LNSTAT_SYNC0 0x0001
#define MDIO_PHYXS_LNSTAT_SYNC1 0x0002
#define MDIO_PHYXS_LNSTAT_SYNC2 0x0004
#define MDIO_PHYXS_LNSTAT_SYNC3 0x0008
#define MDIO_PHYXS_LNSTAT_ALIGN 0x1000
#define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
MDIO_PHYXS_LNSTAT_SYNC1 | \
MDIO_PHYXS_LNSTAT_SYNC2 | \
MDIO_PHYXS_LNSTAT_SYNC3 | \
MDIO_PHYXS_LNSTAT_ALIGN)
static int teranetics_config_init(struct phy_device *phydev)
{
phydev->supported = SUPPORTED_10000baseT_Full;
phydev->advertising = SUPPORTED_10000baseT_Full;
return 0;
}
static int teranetics_soft_reset(struct phy_device *phydev)
{
return 0;
}
static int teranetics_aneg_done(struct phy_device *phydev)
{
int reg;
/* auto negotiation state can only be checked when using copper
* port, if using fiber port, just lie it's done.
*/
if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
}
return 1;
}
static int teranetics_config_aneg(struct phy_device *phydev)
{
return 0;
}
static int teranetics_read_status(struct phy_device *phydev)
{
int reg;
phydev->link = 1;
phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL;
if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
if (reg < 0 ||
!((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) {
phydev->link = 0;
return 0;
}
reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
phydev->link = 0;
}
return 0;
}
static int teranetics_match_phy_device(struct phy_device *phydev)
{
return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;
}
static struct phy_driver teranetics_driver[] = {
{
.phy_id = PHY_ID_TN2020,
.phy_id_mask = 0xffffffff,
.name = "Teranetics TN2020",
.soft_reset = teranetics_soft_reset,
.aneg_done = teranetics_aneg_done,
.config_init = teranetics_config_init,
.config_aneg = teranetics_config_aneg,
.read_status = teranetics_read_status,
.match_phy_device = teranetics_match_phy_device,
},
};
module_phy_driver(teranetics_driver);
static struct mdio_device_id __maybe_unused teranetics_tbl[] = {
{ PHY_ID_TN2020, 0xffffffff },
{ }
};
MODULE_DEVICE_TABLE(mdio, teranetics_tbl);
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