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// SPDX-License-Identifier: GPL-2.0
/*
* Xilinx GMII2RGMII phy driver
*
* Copyright (C) 2018 Xilinx, Inc.
*/
#include <dm.h>
#include <phy.h>
#include <config.h>
#include <common.h>
DECLARE_GLOBAL_DATA_PTR;
#define ZYNQ_GMII2RGMII_REG 0x10
#define ZYNQ_GMII2RGMII_SPEED_MASK (BMCR_SPEED1000 | BMCR_SPEED100)
static int xilinxgmiitorgmii_config(struct phy_device *phydev)
{
struct phy_device *ext_phydev = phydev->priv;
debug("%s\n", __func__);
if (ext_phydev->drv->config)
ext_phydev->drv->config(ext_phydev);
return 0;
}
static int xilinxgmiitorgmii_extread(struct phy_device *phydev, int addr,
int devaddr, int regnum)
{
struct phy_device *ext_phydev = phydev->priv;
debug("%s\n", __func__);
if (ext_phydev->drv->readext)
ext_phydev->drv->readext(ext_phydev, addr, devaddr, regnum);
return 0;
}
static int xilinxgmiitorgmii_extwrite(struct phy_device *phydev, int addr,
int devaddr, int regnum, u16 val)
{
struct phy_device *ext_phydev = phydev->priv;
debug("%s\n", __func__);
if (ext_phydev->drv->writeext)
ext_phydev->drv->writeext(ext_phydev, addr, devaddr, regnum,
val);
return 0;
}
static int xilinxgmiitorgmii_startup(struct phy_device *phydev)
{
u16 val = 0;
struct phy_device *ext_phydev = phydev->priv;
debug("%s\n", __func__);
ext_phydev->dev = phydev->dev;
if (ext_phydev->drv->startup)
ext_phydev->drv->startup(ext_phydev);
val = phy_read(phydev, phydev->addr, ZYNQ_GMII2RGMII_REG);
val &= ~ZYNQ_GMII2RGMII_SPEED_MASK;
if (ext_phydev->speed == SPEED_1000)
val |= BMCR_SPEED1000;
else if (ext_phydev->speed == SPEED_100)
val |= BMCR_SPEED100;
phy_write(phydev, phydev->addr, ZYNQ_GMII2RGMII_REG, val |
BMCR_FULLDPLX);
phydev->duplex = ext_phydev->duplex;
phydev->speed = ext_phydev->speed;
phydev->link = ext_phydev->link;
return 0;
}
static int xilinxgmiitorgmii_probe(struct phy_device *phydev)
{
int ofnode = phydev->addr;
u32 phy_of_handle;
int ext_phyaddr = -1;
struct phy_device *ext_phydev;
debug("%s\n", __func__);
if (phydev->interface != PHY_INTERFACE_MODE_GMII) {
printf("Incorrect interface type\n");
return -EINVAL;
}
/*
* Read the phy address again as the one we read in ethernet driver
* was overwritten for the purpose of storing the ofnode
*/
phydev->addr = fdtdec_get_int(gd->fdt_blob, ofnode, "reg", -1);
phy_of_handle = fdtdec_lookup_phandle(gd->fdt_blob, ofnode,
"phy-handle");
if (phy_of_handle > 0)
ext_phyaddr = fdtdec_get_int(gd->fdt_blob,
phy_of_handle,
"reg", -1);
ext_phydev = phy_find_by_mask(phydev->bus,
1 << ext_phyaddr,
PHY_INTERFACE_MODE_RGMII);
if (!ext_phydev) {
printf("%s, No external phy device found\n", __func__);
return -EINVAL;
}
ext_phydev->node = offset_to_ofnode(phy_of_handle);
phydev->priv = ext_phydev;
debug("%s, gmii2rgmmi:0x%x, extphy:0x%x\n", __func__, phydev->addr,
ext_phyaddr);
phydev->flags |= PHY_FLAG_BROKEN_RESET;
return 0;
}
static struct phy_driver gmii2rgmii_driver = {
.name = "XILINX GMII2RGMII",
.uid = PHY_GMII2RGMII_ID,
.mask = 0xffffffff,
.features = PHY_GBIT_FEATURES,
.probe = xilinxgmiitorgmii_probe,
.config = xilinxgmiitorgmii_config,
.startup = xilinxgmiitorgmii_startup,
.writeext = xilinxgmiitorgmii_extwrite,
.readext = xilinxgmiitorgmii_extread,
};
int phy_xilinx_gmii2rgmii_init(void)
{
phy_register(&gmii2rgmii_driver);
return 0;
}
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