[PATCH v2] lan743x: add virtual PHY for PHY-less devices
From: Sergej Bauer
Date: Fri Jan 22 2021 - 16:56:31 EST
From: sbauer@xxxxxxxxxxx
v1->v2:
switch to using of fixed_phy as was suggested by Andrew and Florian
also features-related parts are removed
Previous versions can be found at:
v1:
initial version
https://lkml.org/lkml/2020/9/17/1272
Signed-off-by: Sergej Bauer <sbauer@xxxxxxxxxxx>
diff --git a/MAINTAINERS b/MAINTAINERS
index 650deb973913..86304efd7691 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11699,6 +11699,12 @@ L: netdev@xxxxxxxxxxxxxxx
S: Maintained
F: drivers/net/ethernet/microchip/lan743x_*
+MICROCHIP LAN743X VIRTUAL PHY
+M: Sergej Bauer <sbauer@xxxxxxxxxxx>
+L: netdev@xxxxxxxxxxxxxxx
+S: Maintained
+F: drivers/net/ethernet/microchip/lan743x_virtual_phy.*
+
MICROCHIP LCDFB DRIVER
M: Nicolas Ferre <nicolas.ferre@xxxxxxxxxxxxx>
L: linux-fbdev@xxxxxxxxxxxxxxx
diff --git a/drivers/net/ethernet/microchip/Kconfig b/drivers/net/ethernet/microchip/Kconfig
index d0f6dfe0dcf3..fbc94cf115bd 100644
--- a/drivers/net/ethernet/microchip/Kconfig
+++ b/drivers/net/ethernet/microchip/Kconfig
@@ -48,6 +48,7 @@ config LAN743X
select PHYLIB
select CRC16
select CRC32
+ select FIXED_PHY
help
Support for the Microchip LAN743x PCI Express Gigabit Ethernet chip
diff --git a/drivers/net/ethernet/microchip/Makefile b/drivers/net/ethernet/microchip/Makefile
index da603540ca57..dc3a2d66c286 100644
--- a/drivers/net/ethernet/microchip/Makefile
+++ b/drivers/net/ethernet/microchip/Makefile
@@ -7,4 +7,4 @@ obj-$(CONFIG_ENC28J60) += enc28j60.o
obj-$(CONFIG_ENCX24J600) += encx24j600.o encx24j600-regmap.o
obj-$(CONFIG_LAN743X) += lan743x.o
-lan743x-objs := lan743x_main.o lan743x_ethtool.o lan743x_ptp.o
+lan743x-objs := lan743x_main.o lan743x_ethtool.o lan743x_ptp.o lan743x_virtual_phy.o
diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
index c5de8f46cdd3..22636366d0db 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
@@ -816,6 +816,17 @@ static int lan743x_ethtool_set_wol(struct net_device *netdev,
}
#endif /* CONFIG_PM */
+int lan743x_set_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ if (!netdev->phydev)
+ return -ENETDOWN;
+
+ return phy_is_pseudo_fixed_link(netdev->phydev) ?
+ lan743x_set_virtual_link_ksettings(netdev, cmd)
+ : phy_ethtool_set_link_ksettings(netdev, cmd);
+}
+
const struct ethtool_ops lan743x_ethtool_ops = {
.get_drvinfo = lan743x_ethtool_get_drvinfo,
.get_msglevel = lan743x_ethtool_get_msglevel,
@@ -839,7 +850,7 @@ const struct ethtool_ops lan743x_ethtool_ops = {
.get_eee = lan743x_ethtool_get_eee,
.set_eee = lan743x_ethtool_set_eee,
.get_link_ksettings = phy_ethtool_get_link_ksettings,
- .set_link_ksettings = phy_ethtool_set_link_ksettings,
+ .set_link_ksettings = lan743x_set_link_ksettings,
#ifdef CONFIG_PM
.get_wol = lan743x_ethtool_get_wol,
.set_wol = lan743x_ethtool_set_wol,
diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.h b/drivers/net/ethernet/microchip/lan743x_ethtool.h
index d0d11a777a58..7287474d4a5c 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.h
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.h
@@ -8,4 +8,7 @@
extern const struct ethtool_ops lan743x_ethtool_ops;
+int lan743x_set_virtual_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd);
+
#endif /* _LAN743X_ETHTOOL_H */
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c
index 3804310c853a..d8c00fa298d0 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.c
+++ b/drivers/net/ethernet/microchip/lan743x_main.c
@@ -17,6 +17,11 @@
#include <linux/crc16.h>
#include "lan743x_main.h"
#include "lan743x_ethtool.h"
+#include "lan743x_virtual_phy.h"
+
+static char *mii_regs[32];
+static int mii_regs_count;
+module_param_array(mii_regs, charp, &mii_regs_count, 0644);
static void lan743x_pci_cleanup(struct lan743x_adapter *adapter)
{
@@ -821,7 +826,7 @@ static int lan743x_mac_init(struct lan743x_adapter *adapter)
return 0;
}
-static int lan743x_mac_open(struct lan743x_adapter *adapter)
+int lan743x_mac_open(struct lan743x_adapter *adapter)
{
u32 temp;
@@ -832,7 +837,7 @@ static int lan743x_mac_open(struct lan743x_adapter *adapter)
return 0;
}
-static void lan743x_mac_close(struct lan743x_adapter *adapter)
+void lan743x_mac_close(struct lan743x_adapter *adapter)
{
u32 temp;
@@ -1000,8 +1005,10 @@ static void lan743x_phy_close(struct lan743x_adapter *adapter)
struct net_device *netdev = adapter->netdev;
phy_stop(netdev->phydev);
- phy_disconnect(netdev->phydev);
- netdev->phydev = NULL;
+ if (phy_is_pseudo_fixed_link(netdev->phydev))
+ lan743x_virtual_phy_disconnect(netdev->phydev);
+ else
+ phy_disconnect(netdev->phydev);
}
static int lan743x_phy_open(struct lan743x_adapter *adapter)
@@ -1019,11 +1026,22 @@ static int lan743x_phy_open(struct lan743x_adapter *adapter)
/* try internal phy */
phydev = phy_find_first(adapter->mdiobus);
if (!phydev)
+ phydev = lan743x_virtual_phy(adapter, mii_regs,
+ mii_regs_count);
+
+ if (!phydev || IS_ERR(phydev))
goto return_error;
- ret = phy_connect_direct(netdev, phydev,
- lan743x_phy_link_status_change,
- PHY_INTERFACE_MODE_GMII);
+ if (phy_is_pseudo_fixed_link(phydev)) {
+ ret = phy_connect_direct(netdev, phydev,
+ lan743x_virtual_phy_status_change,
+ PHY_INTERFACE_MODE_MII);
+ } else {
+ ret = phy_connect_direct(netdev, phydev,
+ lan743x_phy_link_status_change,
+ PHY_INTERFACE_MODE_GMII);
+ }
+
if (ret)
goto return_error;
}
@@ -1031,6 +1049,15 @@ static int lan743x_phy_open(struct lan743x_adapter *adapter)
/* MAC doesn't support 1000T Half */
phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_1000baseT_Half_BIT);
+ if (phy_is_pseudo_fixed_link(phydev)) {
+ phy_remove_link_mode(phydev, ETHTOOL_LINK_MODE_TP_BIT);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+ phydev->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+ phydev->supported);
+ phy_advertise_supported(phydev);
+ }
+
/* support both flow controls */
phy_support_asym_pause(phydev);
phy->fc_request_control = (FLOW_CTRL_RX | FLOW_CTRL_TX);
@@ -2580,11 +2607,20 @@ static netdev_tx_t lan743x_netdev_xmit_frame(struct sk_buff *skb,
static int lan743x_netdev_ioctl(struct net_device *netdev,
struct ifreq *ifr, int cmd)
{
+ int ret;
+
if (!netif_running(netdev))
return -EINVAL;
+
if (cmd == SIOCSHWTSTAMP)
return lan743x_ptp_ioctl(netdev, ifr, cmd);
- return phy_mii_ioctl(netdev->phydev, ifr, cmd);
+
+ if (phy_is_pseudo_fixed_link(netdev->phydev))
+ ret = lan743x_virtual_phy_mii_ioctl(netdev->phydev, ifr, cmd);
+ else
+ ret = phy_mii_ioctl(netdev->phydev, ifr, cmd);
+
+ return ret;
}
static void lan743x_netdev_set_multicast(struct net_device *netdev)
diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h
index 404af3f4635e..8e16fd0f166a 100644
--- a/drivers/net/ethernet/microchip/lan743x_main.h
+++ b/drivers/net/ethernet/microchip/lan743x_main.h
@@ -109,6 +109,7 @@
#define MAC_CR_EEE_EN_ BIT(17)
#define MAC_CR_ADD_ BIT(12)
#define MAC_CR_ASD_ BIT(11)
+#define MAC_CR_INT_LOOPBACK_ BIT(10)
#define MAC_CR_CNTR_RST_ BIT(5)
#define MAC_CR_DPX_ BIT(3)
#define MAC_CR_CFG_H_ BIT(2)
diff --git a/drivers/net/ethernet/microchip/lan743x_virtual_phy.c b/drivers/net/ethernet/microchip/lan743x_virtual_phy.c
new file mode 100644
index 000000000000..b6bf7c016448
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan743x_virtual_phy.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (C) 2021 Sergej Bauer
+#include <linux/netdevice.h>
+#include <linux/phy.h>
+#include <linux/phy_fixed.h>
+#include <linux/ethtool.h>
+#include <linux/rtnetlink.h>
+#include "lan743x_main.h"
+#include "lan743x_ethtool.h"
+#include "lan743x_virtual_phy.h"
+
+static u16 regs802p3[32];
+
+int lan743x_virtual_phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr,
+ int cmd)
+{
+ struct ethtool_link_ksettings ksettings;
+ struct net_device *netdev = phydev->attached_dev;
+ struct mii_ioctl_data *mii_data = if_mii(ifr);
+ int ret = 0;
+ u16 val = mii_data->val_in;
+ u16 reg_num = mii_data->reg_num;
+
+ if (reg_num > 0x1f)
+ return -ERANGE;
+
+ memset(&ksettings, 0, sizeof(ksettings));
+ phy_ethtool_get_link_ksettings(netdev, &ksettings);
+ ksettings.base.autoneg = AUTONEG_ENABLE;
+
+ switch (cmd) {
+ case SIOCGMIIPHY:
+ break;
+ case SIOCGMIIREG:
+ mii_data->val_out = regs802p3[reg_num];
+ break;
+ case SIOCSMIIREG:
+ switch (reg_num) {
+ case MII_BMCR:
+ val &= ~BMCR_RESET;
+ if (!(val & BMCR_FULLDPLX))
+ val |= BMCR_FULLDPLX;
+ val &= ~0x1f;
+
+ if (val & BMCR_ANRESTART)
+ val &= ~BMCR_ANRESTART;
+
+ if ((val & BMCR_SPEED1000) && (val & BMCR_SPEED100)) {
+ ret = -EINVAL;
+ netdev_err(netdev, "invalid bits 0.6 and 0.13");
+ break;
+ }
+
+ ksettings.base.duplex = DUPLEX_FULL;
+
+ if (val & BMCR_SPEED1000)
+ ksettings.base.speed = SPEED_1000;
+ else if (val & BMCR_SPEED100)
+ ksettings.base.speed = SPEED_100;
+ else
+ ksettings.base.speed = SPEED_10;
+
+ break;
+
+ case 1:
+ case 2:
+ case 3:
+ case 15:
+ default:
+ regs802p3[reg_num] = val;
+ break;
+ }
+ ret = lan743x_set_virtual_link_ksettings(netdev, &ksettings);
+ if (ret == 0)
+ regs802p3[reg_num] = val;
+
+ break;
+ default:
+ netdev_err(netdev, "not supported ioctl %X\n", cmd);
+ ret = -EOPNOTSUPP;
+ };
+
+ return ret;
+}
+
+void lan743x_virtual_phy_disconnect(struct phy_device *phydev)
+{
+ struct net_device *attached_dev = phydev->attached_dev;
+
+ if (phydev->sysfs_links) {
+ if (phydev->attached_dev)
+ sysfs_remove_link(&attached_dev->dev.kobj,
+ "phydev");
+ sysfs_remove_link(&phydev->mdio.dev.kobj,
+ "attached_dev");
+ }
+
+ fixed_phy_unregister(phydev);
+}
+
+void lan743x_virtual_phy_status_change(struct net_device *netdev)
+{
+ struct lan743x_adapter *adapter = netdev_priv(netdev);
+ struct phy_device *phydev = netdev->phydev;
+ u32 data;
+
+ if (!netdev->phydev)
+ return;
+
+ if (phydev->state == PHY_RUNNING) {
+ data = lan743x_csr_read(adapter, MAC_CR);
+ data |= MAC_CR_INT_LOOPBACK_;
+ data &= ~MAC_CR_MII_EN_;
+ data |= MAC_CR_DPX_;
+
+ switch (phydev->speed) {
+ case SPEED_10:
+ data &= ~MAC_CR_CFG_H_;
+ data &= ~MAC_CR_CFG_L_;
+ break;
+ case SPEED_100:
+ data &= ~MAC_CR_CFG_H_;
+ data |= MAC_CR_CFG_L_;
+ break;
+ case SPEED_1000:
+ data |= MAC_CR_CFG_H_;
+ data &= ~MAC_CR_CFG_L_;
+ break;
+ }
+ lan743x_csr_write(adapter, MAC_CR, data);
+ }
+ phy_print_status(phydev);
+}
+
+struct phy_device *lan743x_virtual_phy(struct lan743x_adapter *adapter,
+ char *mii_regs[], int mii_regs_count)
+{
+ struct phy_device *phydev = NULL;
+ struct net_device *netdev = adapter->netdev;
+ struct mii_ioctl_data mii_data;
+ struct ifreq ifr;
+ long res;
+ int ret, i;
+
+ struct fixed_phy_status status = {
+ .link = 1,
+ .speed = SPEED_1000,
+ .duplex = DUPLEX_FULL,
+ .asym_pause = 1,
+ };
+
+ phydev = fixed_phy_register(PHY_POLL, &status, NULL);
+ if (!phydev || IS_ERR(phydev)) {
+ netif_err(adapter, ifup, adapter->netdev,
+ "failed to regiter fixed_phy\n");
+ goto out;
+ }
+ phydev->attached_dev = netdev;
+ netdev->phydev = phydev;
+
+ linkmode_clear_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
+ phydev->supported);
+ linkmode_clear_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
+ phydev->supported);
+ linkmode_clear_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+ phydev->supported);
+
+ if (mii_regs_count > 0) {
+ for (i = 0; i < mii_regs_count; i++) {
+ mii_data.reg_num = i;
+ ret = kstrtol(mii_regs[i], 16, &res);
+
+ if (ret == 0)
+ mii_data.val_in = res;
+ else
+ mii_data.val_in = 0xffff;
+
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data,
+ sizeof(mii_data));
+ ret = lan743x_virtual_phy_mii_ioctl(phydev, &ifr,
+ SIOCSMIIREG);
+ if (ret < 0)
+ return NULL;
+ }
+ } else {
+ mii_data.reg_num = MII_BMSR;
+ mii_data.val_in = BMSR_100FULL | BMSR_10FULL | BMSR_ESTATEN |
+ BMSR_ANEGCOMPLETE | BMSR_ANEGCAPABLE | BMSR_LSTATUS |
+ BMSR_ERCAP;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_PHYSID1;
+ mii_data.val_in = (adapter->csr.id_rev & ID_REV_ID_MASK_) >> 16;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_PHYSID2;
+ mii_data.val_in = adapter->csr.id_rev & ID_REV_CHIP_REV_MASK_;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_ADVERTISE;
+ mii_data.val_in = ADVERTISE_100FULL | ADVERTISE_10FULL |
+ ADVERTISE_LPACK;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_LPA;
+ mii_data.val_in = ADVERTISE_100FULL | ADVERTISE_10FULL |
+ ADVERTISE_LPACK;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_EXPANSION;
+ mii_data.val_in = EXPANSION_NWAY | EXPANSION_ENABLENPAGE |
+ EXPANSION_NPCAPABLE;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_CTRL1000;
+ mii_data.val_in = ADVERTISE_1000FULL;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_STAT1000;
+ mii_data.val_in = LPA_1000FULL | LPA_1000REMRXOK |
+ LPA_1000LOCALRXOK | LPA_1000MSRES;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_ESTATUS;
+ mii_data.val_in = ESTATUS_1000_TFULL;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+
+ mii_data.reg_num = MII_BMCR;
+ mii_data.val_in = BMCR_SPEED1000 | BMCR_FULLDPLX |
+ BMCR_LOOPBACK | BMCR_ANENABLE;
+ memcpy(&ifr.ifr_ifru.ifru_data, &mii_data, sizeof(mii_data));
+ lan743x_virtual_phy_mii_ioctl(phydev, &ifr, SIOCSMIIREG);
+ }
+
+ phydev->attached_dev = NULL;
+out:
+ return phydev;
+}
+
+int lan743x_set_virtual_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd)
+{
+ struct ethtool_link_ksettings *cmd_ref =
+ (struct ethtool_link_ksettings *)cmd;
+ struct lan743x_adapter *adapter = netdev_priv(netdev);
+ u32 speed = cmd->base.speed;
+ u8 duplex = cmd->base.duplex;
+ u16 v = 0;
+ u32 data;
+
+ if (!netdev->phydev)
+ return -ENETDOWN;
+ if (speed &&
+ speed != SPEED_10 && speed != SPEED_100 && speed != SPEED_1000) {
+ netdev_err(netdev, "%s: unknown speed %d\n", netdev->name,
+ speed);
+ return -EINVAL;
+ }
+
+ v = regs802p3[0];
+ v &= ~(BMCR_SPEED1000 | BMCR_SPEED100);
+ data = lan743x_csr_read(adapter, MAC_CR);
+ duplex = DUPLEX_FULL;
+
+ if (speed != adapter->netdev->phydev->speed) {
+ lan743x_mac_close(adapter);
+ switch (speed) {
+ case 0:
+ break;
+ case SPEED_10:
+ data &= ~(MAC_CR_CFG_H_ | MAC_CR_CFG_L_);
+ lan743x_csr_write(adapter, MAC_CR, data);
+
+ regs802p3[MII_ADVERTISE] = ADVERTISE_10FULL |
+ ADVERTISE_100FULL |
+ ADVERTISE_LPACK;
+ regs802p3[MII_LPA] = LPA_10FULL | LPA_LPACK;
+ regs802p3[MII_EXPANSION] = ESTATUS_1000_TFULL;
+ regs802p3[MII_CTRL1000] = ADVERTISE_1000FULL;
+ regs802p3[MII_STAT1000] = 0;
+ break;
+ case SPEED_100:
+ v |= BMCR_SPEED100;
+ data &= ~MAC_CR_CFG_H_;
+ data |= MAC_CR_CFG_L_;
+ lan743x_csr_write(adapter, MAC_CR, data);
+
+ regs802p3[MII_ADVERTISE] = ADVERTISE_10FULL |
+ ADVERTISE_100FULL |
+ ADVERTISE_LPACK;
+ regs802p3[MII_LPA] = LPA_10FULL | LPA_100FULL |
+ LPA_LPACK;
+ regs802p3[MII_EXPANSION] = ESTATUS_1000_TFULL;
+ regs802p3[MII_CTRL1000] = ADVERTISE_1000FULL;
+ regs802p3[MII_STAT1000] = 0;
+ break;
+ case SPEED_1000:
+ v |= BMCR_SPEED1000;
+ data |= MAC_CR_CFG_H_;
+ data &= ~MAC_CR_CFG_L_;
+ lan743x_csr_write(adapter, MAC_CR, data);
+
+ regs802p3[MII_ADVERTISE] = ADVERTISE_10FULL |
+ ADVERTISE_100FULL |
+ ADVERTISE_LPACK;
+ regs802p3[MII_LPA] = LPA_10FULL | LPA_100FULL |
+ LPA_LPACK;
+ regs802p3[MII_EXPANSION] = ESTATUS_1000_TFULL;
+ regs802p3[MII_CTRL1000] = ADVERTISE_1000FULL;
+ regs802p3[MII_STAT1000] = LPA_1000FULL |
+ LPA_1000REMRXOK | LPA_1000LOCALRXOK |
+ LPA_1000MSRES;
+ break;
+ };
+ lan743x_mac_open(adapter);
+
+ v |= BMCR_LOOPBACK | BMCR_FULLDPLX | BMCR_ANENABLE;
+ regs802p3[0] = v;
+ }
+
+ cmd_ref->base.duplex = duplex;
+ cmd_ref->base.autoneg = AUTONEG_ENABLE;
+
+ return phy_ethtool_set_link_ksettings(netdev, cmd_ref);
+}
+
diff --git a/drivers/net/ethernet/microchip/lan743x_virtual_phy.h b/drivers/net/ethernet/microchip/lan743x_virtual_phy.h
new file mode 100644
index 000000000000..caef07d73d74
--- /dev/null
+++ b/drivers/net/ethernet/microchip/lan743x_virtual_phy.h
@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/* Copyright (C) 2021 Sergej Bauer */
+#ifndef LAN743X_FAKE_PHY_H
+#define LAN743X_FAKE_PHY_H
+
+#include "lan743x_main.h"
+
+struct phy_device *lan743x_virtual_phy(struct lan743x_adapter *adapter,
+ char *mii_regs[], int mii_regs_count);
+void lan743x_virtual_phy_disconnect(struct phy_device *phydev);
+int lan743x_virtual_phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr,
+ int cmd);
+void lan743x_virtual_phy_status_change(struct net_device *netdev);
+int lan743x_set_virtual_link_ksettings(struct net_device *netdev,
+ const struct ethtool_link_ksettings *cmd);
+
+int lan743x_mac_open(struct lan743x_adapter *adapter);
+void lan743x_mac_close(struct lan743x_adapter *adapter);
+
+#endif