These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / net / phy / teranetics.c

diff --git a/kernel/drivers/net/phy/teranetics.c b/kernel/drivers/net/phy/teranetics.c
new file mode 100644 (file)
index 0000000..07463fc
--- /dev/null
+++ b/kernel/drivers/net/phy/teranetics.c
@@ -0,0 +1,122 @@
+/*
+ * Driver for Teranetics PHY
+ *
+ * Author: Shaohui Xie <Shaohui.Xie@freescale.com>
+ *
+ * Copyright 2015 Freescale Semiconductor, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#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_config_init(struct phy_device *phydev)
+{
+       phydev->supported = SUPPORTED_10000baseT_Full;
+       phydev->advertising = SUPPORTED_10000baseT_Full;
+
+       return 0;
+}
+
+static int teranetics_soft_reset(struct phy_device *phydev)
+{
+       return 0;
+}
+
+static int teranetics_aneg_done(struct phy_device *phydev)
+{
+       int reg;
+
+       /* 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)) {
+               reg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
+               return (reg < 0) ? reg : (reg & BMSR_ANEGCOMPLETE);
+       }
+
+       return 1;
+}
+
+static int teranetics_config_aneg(struct phy_device *phydev)
+{
+       return 0;
+}
+
+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",
+       .soft_reset     = teranetics_soft_reset,
+       .aneg_done      = teranetics_aneg_done,
+       .config_init    = teranetics_config_init,
+       .config_aneg    = teranetics_config_aneg,
+       .read_status    = teranetics_read_status,
+       .match_phy_device = teranetics_match_phy_device,
+       .driver         = { .owner = THIS_MODULE,},
+},
+};
+
+module_phy_driver(teranetics_driver);
+
+static struct mdio_device_id __maybe_unused teranetics_tbl[] = {
+       { PHY_ID_TN2020, 0xffffffff },
+       { }
+};
+
+MODULE_DEVICE_TABLE(mdio, teranetics_tbl);