phy: Add phy driver support for xilinx PCS/PMA core

Add phy driver support for xilinx PCS/PMA core

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Kedareswara rao Appana <appanad@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

drivers/net/phy/Makefile

@@ -25,4 +25,5 @@ obj-$(CONFIG_PHY_REALTEK) += realtek.o
 obj-$(CONFIG_PHY_SMSC) += smsc.o
 obj-$(CONFIG_PHY_TERANETICS) += teranetics.o
 obj-$(CONFIG_PHY_TI) += ti.o
+obj-$(CONFIG_PHY_XILINX) += xilinx_phy.o
 obj-$(CONFIG_PHY_VITESSE) += vitesse.o

drivers/net/phy/phy.c

@@ -503,6 +503,9 @@ int phy_init(void)
 #ifdef CONFIG_PHY_VITESSE
 	phy_vitesse_init();
 #endif
+#ifdef CONFIG_PHY_XILINX
+	phy_xilinx_init();
+#endif
 
 	return 0;
 }

drivers/net/phy/xilinx_phy.c

@@ -0,0 +1,144 @@
+/*
+ * Xilinx PCS/PMA Core phy driver
+ *
+ * Copyright (C) 2015 - 2016 Xilinx, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <phy.h>
+#include <dm.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define MII_PHY_STATUS_SPD_MASK		0x0C00
+#define MII_PHY_STATUS_FULLDUPLEX	0x1000
+#define MII_PHY_STATUS_1000		0x0800
+#define MII_PHY_STATUS_100		0x0400
+#define XPCSPMA_PHY_CTRL_ISOLATE_DISABLE 0xFBFF
+
+/* Mask used for ID comparisons */
+#define XILINX_PHY_ID_MASK		0xfffffff0
+
+/* Known PHY IDs */
+#define XILINX_PHY_ID			0x01740c00
+
+/* struct phy_device dev_flags definitions */
+#define XAE_PHY_TYPE_MII		0
+#define XAE_PHY_TYPE_GMII		1
+#define XAE_PHY_TYPE_RGMII_1_3		2
+#define XAE_PHY_TYPE_RGMII_2_0		3
+#define XAE_PHY_TYPE_SGMII		4
+#define XAE_PHY_TYPE_1000BASE_X		5
+
+static int xilinxphy_startup(struct phy_device *phydev)
+{
+	int err;
+	int status = 0;
+
+	debug("%s\n", __func__);
+	/* Update the link, but return if there
+	 * was an error
+	 */
+	err = genphy_update_link(phydev);
+	if (err)
+		return err;
+
+	if (AUTONEG_ENABLE == phydev->autoneg) {
+		status = phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
+		status = status & MII_PHY_STATUS_SPD_MASK;
+
+		if (status & MII_PHY_STATUS_FULLDUPLEX)
+			phydev->duplex = DUPLEX_FULL;
+		else
+			phydev->duplex = DUPLEX_HALF;
+
+		switch (status) {
+		case MII_PHY_STATUS_1000:
+			phydev->speed = SPEED_1000;
+			break;
+
+		case MII_PHY_STATUS_100:
+			phydev->speed = SPEED_100;
+			break;
+
+		default:
+			phydev->speed = SPEED_10;
+			break;
+		}
+	} else {
+		int bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+
+		if (bmcr < 0)
+			return bmcr;
+
+		if (bmcr & BMCR_FULLDPLX)
+			phydev->duplex = DUPLEX_FULL;
+		else
+			phydev->duplex = DUPLEX_HALF;
+
+		if (bmcr & BMCR_SPEED1000)
+			phydev->speed = SPEED_1000;
+		else if (bmcr & BMCR_SPEED100)
+			phydev->speed = SPEED_100;
+		else
+			phydev->speed = SPEED_10;
+	}
+
+	/*
+	 * For 1000BASE-X Phy Mode the speed/duplex will always be
+	 * 1000Mbps/fullduplex
+	 */
+	if (phydev->flags == XAE_PHY_TYPE_1000BASE_X) {
+		phydev->duplex = DUPLEX_FULL;
+		phydev->speed = SPEED_1000;
+	}
+
+	return 0;
+}
+
+static int xilinxphy_of_init(struct phy_device *phydev)
+{
+	struct udevice *dev = (struct udevice *)&phydev->dev;
+	u32 phytype;
+
+	debug("%s\n", __func__);
+	phytype = fdtdec_get_int(gd->fdt_blob, dev->of_offset, "phy-type", -1);
+	if (phytype == XAE_PHY_TYPE_1000BASE_X)
+		phydev->flags |= XAE_PHY_TYPE_1000BASE_X;
+
+	return 0;
+}
+
+static int xilinxphy_config(struct phy_device *phydev)
+{
+	int temp;
+
+	debug("%s\n", __func__);
+	xilinxphy_of_init(phydev);
+	temp = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+	temp &= XPCSPMA_PHY_CTRL_ISOLATE_DISABLE;
+	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, temp);
+
+	return 0;
+}
+
+static struct phy_driver xilinxphy_driver = {
+	.uid = XILINX_PHY_ID,
+	.mask = XILINX_PHY_ID_MASK,
+	.name = "Xilinx PCS/PMA PHY",
+	.features = PHY_GBIT_FEATURES,
+	.config = &xilinxphy_config,
+	.startup = &xilinxphy_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+int phy_xilinx_init(void)
+{
+	debug("%s\n", __func__);
+	phy_register(&xilinxphy_driver);
+
+	return 0;
+}

include/phy.h

@@ -264,6 +264,7 @@ int phy_smsc_init(void);
 int phy_teranetics_init(void);
 int phy_ti_init(void);
 int phy_vitesse_init(void);
+int phy_xilinx_init(void);
 
 int board_phy_config(struct phy_device *phydev);
 int get_phy_id(struct mii_dev *bus, int addr, int devad, u32 *phy_id);