126 lines
3.2 KiB
C
Executable file
126 lines
3.2 KiB
C
Executable file
/* Xilinx GMII2RGMII Converter driver
|
|
*
|
|
* Copyright (C) 2016 Xilinx, Inc.
|
|
* Copyright (C) 2016 Andrew Lunn <andrew@lunn.ch>
|
|
*
|
|
* Author: Andrew Lunn <andrew@lunn.ch>
|
|
* Author: Kedareswara rao Appana <appanad@xilinx.com>
|
|
*
|
|
* Description:
|
|
* This driver is developed for Xilinx GMII2RGMII Converter
|
|
*
|
|
* 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/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mii.h>
|
|
#include <linux/mdio.h>
|
|
#include <linux/phy.h>
|
|
#include <linux/of_mdio.h>
|
|
|
|
#define XILINX_GMII2RGMII_REG 0x10
|
|
#define XILINX_GMII2RGMII_SPEED_MASK (BMCR_SPEED1000 | BMCR_SPEED100)
|
|
|
|
struct gmii2rgmii {
|
|
struct phy_device *phy_dev;
|
|
struct phy_driver *phy_drv;
|
|
struct phy_driver conv_phy_drv;
|
|
struct mdio_device *mdio;
|
|
};
|
|
|
|
static int xgmiitorgmii_read_status(struct phy_device *phydev)
|
|
{
|
|
struct gmii2rgmii *priv = phydev->priv;
|
|
struct mii_bus *bus = priv->mdio->bus;
|
|
int addr = priv->mdio->addr;
|
|
u16 val = 0;
|
|
int err;
|
|
|
|
if (priv->phy_drv->read_status)
|
|
err = priv->phy_drv->read_status(phydev);
|
|
else
|
|
err = genphy_read_status(phydev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
val = mdiobus_read(bus, addr, XILINX_GMII2RGMII_REG);
|
|
val &= ~XILINX_GMII2RGMII_SPEED_MASK;
|
|
|
|
if (phydev->speed == SPEED_1000)
|
|
val |= BMCR_SPEED1000;
|
|
else if (phydev->speed == SPEED_100)
|
|
val |= BMCR_SPEED100;
|
|
else
|
|
val |= BMCR_SPEED10;
|
|
|
|
mdiobus_write(bus, addr, XILINX_GMII2RGMII_REG, val);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xgmiitorgmii_probe(struct mdio_device *mdiodev)
|
|
{
|
|
struct device *dev = &mdiodev->dev;
|
|
struct device_node *np = dev->of_node, *phy_node;
|
|
struct gmii2rgmii *priv;
|
|
|
|
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
phy_node = of_parse_phandle(np, "phy-handle", 0);
|
|
if (!phy_node) {
|
|
dev_err(dev, "Couldn't parse phy-handle\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
priv->phy_dev = of_phy_find_device(phy_node);
|
|
of_node_put(phy_node);
|
|
if (!priv->phy_dev) {
|
|
dev_info(dev, "Couldn't find phydev\n");
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
if (!priv->phy_dev->drv) {
|
|
dev_info(dev, "Attached phy not ready\n");
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
priv->mdio = mdiodev;
|
|
priv->phy_drv = priv->phy_dev->drv;
|
|
memcpy(&priv->conv_phy_drv, priv->phy_dev->drv,
|
|
sizeof(struct phy_driver));
|
|
priv->conv_phy_drv.read_status = xgmiitorgmii_read_status;
|
|
priv->phy_dev->priv = priv;
|
|
priv->phy_dev->drv = &priv->conv_phy_drv;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id xgmiitorgmii_of_match[] = {
|
|
{ .compatible = "xlnx,gmii-to-rgmii-1.0" },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, xgmiitorgmii_of_match);
|
|
|
|
static struct mdio_driver xgmiitorgmii_driver = {
|
|
.probe = xgmiitorgmii_probe,
|
|
.mdiodrv.driver = {
|
|
.name = "xgmiitorgmii",
|
|
.of_match_table = xgmiitorgmii_of_match,
|
|
},
|
|
};
|
|
|
|
mdio_module_driver(xgmiitorgmii_driver);
|
|
|
|
MODULE_DESCRIPTION("Xilinx GMII2RGMII converter driver");
|
|
MODULE_LICENSE("GPL");
|