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-rw-r--r--drivers/net/phy/teranetics.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/net/phy/teranetics.c b/drivers/net/phy/teranetics.c
new file mode 100644
index 000000000..8057ea8db
--- /dev/null
+++ b/drivers/net/phy/teranetics.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Driver for Teranetics PHY
+ *
+ * Author: Shaohui Xie <Shaohui.Xie@freescale.com>
+ *
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/mdio.h>
+#include <linux/phy.h>
+
+MODULE_DESCRIPTION("Teranetics PHY driver");
+MODULE_AUTHOR("Shaohui Xie <Shaohui.Xie@freescale.com>");
+MODULE_LICENSE("GPL v2");
+
+#define PHY_ID_TN2020 0x00a19410
+#define MDIO_PHYXS_LNSTAT_SYNC0 0x0001
+#define MDIO_PHYXS_LNSTAT_SYNC1 0x0002
+#define MDIO_PHYXS_LNSTAT_SYNC2 0x0004
+#define MDIO_PHYXS_LNSTAT_SYNC3 0x0008
+#define MDIO_PHYXS_LNSTAT_ALIGN 0x1000
+
+#define MDIO_PHYXS_LANE_READY (MDIO_PHYXS_LNSTAT_SYNC0 | \
+ MDIO_PHYXS_LNSTAT_SYNC1 | \
+ MDIO_PHYXS_LNSTAT_SYNC2 | \
+ MDIO_PHYXS_LNSTAT_SYNC3 | \
+ MDIO_PHYXS_LNSTAT_ALIGN)
+
+static int teranetics_aneg_done(struct phy_device *phydev)
+{
+ /* auto negotiation state can only be checked when using copper
+ * port, if using fiber port, just lie it's done.
+ */
+ if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93))
+ return genphy_c45_aneg_done(phydev);
+
+ return 1;
+}
+
+static int teranetics_read_status(struct phy_device *phydev)
+{
+ int reg;
+
+ phydev->link = 1;
+
+ phydev->speed = SPEED_10000;
+ phydev->duplex = DUPLEX_FULL;
+
+ if (!phy_read_mmd(phydev, MDIO_MMD_VEND1, 93)) {
+ reg = phy_read_mmd(phydev, MDIO_MMD_PHYXS, MDIO_PHYXS_LNSTAT);
+ if (reg < 0 ||
+ !((reg & MDIO_PHYXS_LANE_READY) == MDIO_PHYXS_LANE_READY)) {
+ phydev->link = 0;
+ return 0;
+ }
+
+ reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
+ if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
+ phydev->link = 0;
+ }
+
+ return 0;
+}
+
+static int teranetics_match_phy_device(struct phy_device *phydev)
+{
+ return phydev->c45_ids.device_ids[3] == PHY_ID_TN2020;
+}
+
+static struct phy_driver teranetics_driver[] = {
+{
+ .phy_id = PHY_ID_TN2020,
+ .phy_id_mask = 0xffffffff,
+ .name = "Teranetics TN2020",
+ .features = PHY_10GBIT_FEATURES,
+ .aneg_done = teranetics_aneg_done,
+ .config_aneg = gen10g_config_aneg,
+ .read_status = teranetics_read_status,
+ .match_phy_device = teranetics_match_phy_device,
+},
+};
+
+module_phy_driver(teranetics_driver);
+
+static struct mdio_device_id __maybe_unused teranetics_tbl[] = {
+ { PHY_ID_TN2020, 0xffffffff },
+ { }
+};
+
+MODULE_DEVICE_TABLE(mdio, teranetics_tbl);