The VSC8502 is a Microchip (formerly Microsemi, formerly Vitesse)
dual port, gigabit Ethernet copper PHY which supports the MII, GMII and
RGMII MAC-side interfaces.
Of these, I could only test RGMII, and my board needed RGMII delays to
be applied by software, so I am able to confirm that this patch handles
that properly.
Signed-off-by: Vladimir Oltean <vladimir.olt...@nxp.com>
---
drivers/net/phy/mscc.c | 56 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c
index d1a643cf5a0c..f9482b21a010 100644
--- a/drivers/net/phy/mscc.c
+++ b/drivers/net/phy/mscc.c
@@ -19,6 +19,7 @@
/* Microsemi PHY ID's */
#define PHY_ID_VSC8530 0x00070560
#define PHY_ID_VSC8531 0x00070570
+#define PHY_ID_VSC8502 0x00070630
#define PHY_ID_VSC8540 0x00070760
#define PHY_ID_VSC8541 0x00070770
#define PHY_ID_VSC8574 0x000704a0
@@ -1513,6 +1514,50 @@ static int vsc8584_config(struct phy_device *phydev)
return vsc8584_config_init(phydev);
}
+static int vsc8502_config(struct phy_device *phydev)
+{
+ bool rgmii_rx_delay = false, rgmii_tx_delay = false;
+ u16 reg = 0;
+ int ret;
+
+ /* Assume nothing needs to be done for the default GMII/MII mode */
+ if (!phy_interface_is_rgmii(phydev))
+ return 0;
+
+ /* Set Extended PHY Control 1 register to RGMII */
+ phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_EXT_PHY_CNTL_1_REG,
+ BIT(13) | BIT(12));
+
+ /* Soft reset required after changing PHY mode from the default
+ * of GMII/MII
+ */
+ ret = mscc_phy_soft_reset(phydev);
+ if (ret)
+ return ret;
+
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID ||
+ phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
+ rgmii_rx_delay = true;
+ if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID ||
+ phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
+ rgmii_tx_delay = true;
+
+ phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+ MSCC_PHY_PAGE_EXT2);
+
+ if (rgmii_rx_delay)
+ reg |= VSC_PHY_RGMII_DELAY_2000_PS << RGMII_RX_CLK_DELAY_POS;
+ if (rgmii_tx_delay)
+ reg |= VSC_PHY_RGMII_DELAY_2000_PS << RGMII_TX_CLK_DELAY_POS;
+
+ phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_RGMII_CNTL_REG, reg);
+
+ phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+ MSCC_PHY_PAGE_STD);
+
+ return 0;
+}
+
static struct phy_driver VSC8530_driver = {
.name = "Microsemi VSC8530",
.uid = PHY_ID_VSC8530,
@@ -1533,6 +1578,16 @@ static struct phy_driver VSC8531_driver = {
.shutdown = &genphy_shutdown,
};
+static struct phy_driver VSC8502_driver = {
+ .name = "Microsemi VSC8502",
+ .uid = PHY_ID_VSC8502,
+ .mask = 0x000ffff0,
+ .features = PHY_GBIT_FEATURES,
+ .config = &vsc8502_config,
+ .startup = &mscc_startup,
+ .shutdown = &genphy_shutdown,
+};
+
static struct phy_driver VSC8540_driver = {
.name = "Microsemi VSC8540",
.uid = PHY_ID_VSC8540,
@@ -1577,6 +1632,7 @@ int phy_mscc_init(void)
{
phy_register(&VSC8530_driver);
phy_register(&VSC8531_driver);
+ phy_register(&VSC8502_driver);
phy_register(&VSC8540_driver);
phy_register(&VSC8541_driver);
phy_register(&VSC8574_driver);
--
2.25.1
