[PATCH net-next 3/3] net: enetc: add port MDIO support for ENETC v4

[Wei Fang <wei.fang@nxp.com>]

The NETC IP provides two ways for ENETC to access the external PHY, one
is the external MDIO interface is controlled by EMDIO module, and EMDIO
provides a way for different ENETCs to share a set of MDIO signals to
access their PHYs. And this EMDIO support has been added in the commit
a52201fb9caa ("net: enetc: add i.MX95 EMDIO support"). The other way
is that each ENETC has its set of MDIO registers to access and control
its PHY.

In addition, each ENETC has one internal MDIO interface for managing
on-die PHY (PCS). So add port internal and external MDIO support for
ENETC v4.

Signed-off-by: Wei Fang <wei.fang@nxp.com>
---
 drivers/net/ethernet/freescale/enetc/enetc4_hw.h   |  6 ++++++
 .../net/ethernet/freescale/enetc/enetc_pf_common.c | 14 ++++++++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc4_hw.h b/drivers/net/ethernet/freescale/enetc/enetc4_hw.h
index ebea4298791c..3ed0f7a02767 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc4_hw.h
+++ b/drivers/net/ethernet/freescale/enetc/enetc4_hw.h
@@ -170,6 +170,9 @@
 /* Port MAC 0/1 Maximum Frame Length Register */
 #define ENETC4_PM_MAXFRM(mac)		(0x5014 + (mac) * 0x400)
 
+/* Port internal MDIO base address, use to access PCS */
+#define ENETC4_PM_IMDIO_BASE		0x5030
+
 /* Port MAC 0/1 Pause Quanta Register */
 #define ENETC4_PM_PAUSE_QUANTA(mac)	(0x5054 + (mac) * 0x400)
 
@@ -198,6 +201,9 @@
 #define   SSP_1G			2
 #define  PM_IF_MODE_ENA			BIT(15)
 
+/* Port external MDIO Base address, use to access off-chip PHY */
+#define ENETC4_EMDIO_BASE		0x5c00
+
 /**********************ENETC Pseudo MAC port registers************************/
 /* Port pseudo MAC receive octets counter (64-bit) */
 #define ENETC4_PPMROCR			0x5080
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
index 9c634205e2a7..76263b8566bb 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_pf_common.c
@@ -176,7 +176,12 @@ static int enetc_mdio_probe(struct enetc_pf *pf, struct device_node *np)
 	bus->parent = dev;
 	mdio_priv = bus->priv;
 	mdio_priv->hw = &pf->si->hw;
-	mdio_priv->mdio_base = ENETC_EMDIO_BASE;
+
+	if (is_enetc_rev1(pf->si))
+		mdio_priv->mdio_base = ENETC_EMDIO_BASE;
+	else
+		mdio_priv->mdio_base = ENETC4_EMDIO_BASE;
+
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(dev));
 
 	err = of_mdiobus_register(bus, np);
@@ -221,7 +226,12 @@ static int enetc_imdio_create(struct enetc_pf *pf)
 	bus->phy_mask = ~0;
 	mdio_priv = bus->priv;
 	mdio_priv->hw = &pf->si->hw;
-	mdio_priv->mdio_base = ENETC_PM_IMDIO_BASE;
+
+	if (is_enetc_rev1(pf->si))
+		mdio_priv->mdio_base = ENETC_PM_IMDIO_BASE;
+	else
+		mdio_priv->mdio_base = ENETC4_PM_IMDIO_BASE;
+
 	snprintf(bus->id, MII_BUS_ID_SIZE, "%s-imdio", dev_name(dev));
 
 	err = mdiobus_register(bus);
-- 
2.34.1