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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.
*
* CORTINA is a registered trademark of Cortina Systems, Inc.
*
*/
#include <linux/module.h>
#include <linux/phy.h>
#define PHY_ID_CS4340 0x13e51002
#define VILLA_GLOBAL_CHIP_ID_LSB 0x0
#define VILLA_GLOBAL_CHIP_ID_MSB 0x1
#define VILLA_GLOBAL_GPIO_1_INTS 0x017
static int cortina_read_reg(struct phy_device *phydev, u16 regnum)
{
return mdiobus_read(phydev->mdio.bus, phydev->mdio.addr,
MII_ADDR_C45 | regnum);
}
static int cortina_config_aneg(struct phy_device *phydev)
{
phydev->supported = SUPPORTED_10000baseT_Full;
phydev->advertising = SUPPORTED_10000baseT_Full;
return 0;
}
static int cortina_read_status(struct phy_device *phydev)
{
int gpio_int_status, ret = 0;
gpio_int_status = cortina_read_reg(phydev, VILLA_GLOBAL_GPIO_1_INTS);
if (gpio_int_status < 0) {
ret = gpio_int_status;
goto err;
}
if (gpio_int_status & 0x8) {
/* up when edc_convergedS set */
phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL;
phydev->link = 1;
} else {
phydev->link = 0;
}
err:
return ret;
}
static int cortina_soft_reset(struct phy_device *phydev)
{
return 0;
}
static int cortina_probe(struct phy_device *phydev)
{
u32 phy_id = 0;
int id_lsb = 0, id_msb = 0;
/* Read device id from phy registers. */
id_lsb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_LSB);
if (id_lsb < 0)
return -ENXIO;
phy_id = id_lsb << 16;
id_msb = cortina_read_reg(phydev, VILLA_GLOBAL_CHIP_ID_MSB);
if (id_msb < 0)
return -ENXIO;
phy_id |= id_msb;
/* Make sure the device tree binding matched the driver with the
* right device.
*/
if (phy_id != phydev->drv->phy_id) {
phydev_err(phydev, "Error matching phy with %s driver\n",
phydev->drv->name);
return -ENODEV;
}
return 0;
}
static struct phy_driver cortina_driver[] = {
{
.phy_id = PHY_ID_CS4340,
.phy_id_mask = 0xffffffff,
.name = "Cortina CS4340",
.config_aneg = cortina_config_aneg,
.read_status = cortina_read_status,
.soft_reset = cortina_soft_reset,
.probe = cortina_probe,
},
};
module_phy_driver(cortina_driver);
static struct mdio_device_id __maybe_unused cortina_tbl[] = {
{ PHY_ID_CS4340, 0xffffffff},
{},
};
MODULE_DEVICE_TABLE(mdio, cortina_tbl);
MODULE_DESCRIPTION("Cortina EDC CDR 10G Ethernet PHY driver");
MODULE_AUTHOR("NXP");
MODULE_LICENSE("GPL");
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