[U-Boot] [PATCH v2] net:phy:MSCC Add Support for VSC8530-VSC8531-VSC8540-VSC8541

9 Dec 2016

net:phy:MSCC Add Support for VSC8530-VSC8531-VSC8540-VSC8541
Signed-off-by: John Haechten john.haechten@microsemi.com
---
drivers/net/phy/Makefile            |   1 +
 drivers/net/phy/mscc.c              | 509 ++++++++++++++++++++++++++++++++++++
 drivers/net/phy/phy.c               |   3 +
 include/config_phylib_all_drivers.h |   1 +
 include/configs/am335x_evm.h        |   3 +
 include/phy.h                       |   1 +
 6 files changed, 518 insertions(+)
 create mode 100644 drivers/net/phy/mscc.c

diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile index 1e299b9..d372971 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -27,3 +27,4 @@ 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
+obj-$(CONFIG_PHY_MSCC) += mscc.o
diff --git a/drivers/net/phy/mscc.c b/drivers/net/phy/mscc.c new file mode 100644 index 0000000..e665b50
--- /dev/null
+++ b/drivers/net/phy/mscc.c
@@ -0,0 +1,509 @@
+/*
+ * Microsemi PHY drivers
+ *
+ * SPDX-License-Identifier: The MIT License (MIT)
+ *
+ * Copyright (c) 2016 Microsemi Corporation
+ *
+ * Author: John Haechten
+ *
+ */
+
+#include <miiphy.h>
+#include <bitfield.h>
+
+/* Microsemi PHY ID's */
+#define PHY_ID_VSC8530                  0x00070560
+#define PHY_ID_VSC8531                  0x00070570
+#define PHY_ID_VSC8540                  0x00070760
+#define PHY_ID_VSC8541                  0x00070770
+
+/* Microsemi VSC85xx PHY Register Pages */
+#define MSCC_EXT_PAGE_ACCESS            31     /* Page Access Register */
+#define MSCC_PHY_PAGE_STD		0x0000 /* Standard registers */
+#define MSCC_PHY_PAGE_EXT1		0x0001 /* Extended registers - page 1 */
+#define MSCC_PHY_PAGE_EXT2		0x0002 /* Extended registers - page 2 */
+#define MSCC_PHY_PAGE_EXT3		0x0003 /* Extended registers - page 3 */
+#define MSCC_PHY_PAGE_EXT4		0x0004 /* Extended registers - page 4 */
+#define MSCC_PHY_PAGE_GPIO		0x0010 /* GPIO registers */
+#define MSCC_PHY_PAGE_TEST		0x2A30 /* TEST Page registers */
+#define MSCC_PHY_PAGE_TR		0x52B5 /* Token Ring Page registers */
+
+/* Std Page Register 28 - PHY AUX Control/Status */
+#define MIIM_AUX_CNTRL_STAT_REG		28
+#define MIIM_AUX_CNTRL_STAT_ACTIPHY_TO	(0x0004)
+#define MIIM_AUX_CNTRL_STAT_F_DUPLEX	(0x0020)
+#define MIIM_AUX_CNTRL_STAT_SPEED_MASK	(0x0018)
+#define MIIM_AUX_CNTRL_STAT_SPEED_POS	(3)
+#define MIIM_AUX_CNTRL_STAT_SPEED_10M	(0x0)
+#define MIIM_AUX_CNTRL_STAT_SPEED_100M	(0x1)
+#define MIIM_AUX_CNTRL_STAT_SPEED_1000M	(0x2)
+
+/* Std Page Register 23 - Extended PHY CTRL_1 */
+#define MSCC_PHY_EXT_PHY_CNTL_1_REG	23
+#define MAC_IF_SELECTION_MASK		(0x1800)
+#define MAC_IF_SELECTION_GMII		(0)
+#define MAC_IF_SELECTION_RMII		(1)
+#define MAC_IF_SELECTION_RGMII		(2)
+#define MAC_IF_SELECTION_POS		(11)
+#define MAC_IF_SELECTION_WIDTH		(2)
+
+/* Extended Page 2 Register 20E2 */
+#define MSCC_PHY_RGMII_CNTL_REG		20
+#define VSC_FAST_LINK_FAIL2_ENA_MASK	(0x8000)
+#define RX_CLK_OUT_MASK			(0x0800)
+#define RX_CLK_OUT_POS			(11)
+#define RX_CLK_OUT_WIDTH		(1)
+#define RX_CLK_OUT_NORMAL		(0)
+#define RX_CLK_OUT_DISABLE		(1)
+#define RGMII_RX_CLK_DELAY_POS		(4)
+#define RGMII_RX_CLK_DELAY_WIDTH	(3)
+#define RGMII_RX_CLK_DELAY_MASK		(0x0070)
+#define RGMII_TX_CLK_DELAY_POS		(0)
+#define RGMII_TX_CLK_DELAY_WIDTH	(3)
+#define RGMII_TX_CLK_DELAY_MASK		(0x0007)
+
+/* Extended Page 2 Register 27E2 */
+#define MSCC_PHY_WOL_MAC_CONTROL	27
+#define EDGE_RATE_CNTL_POS		(5)
+#define EDGE_RATE_CNTL_WIDTH		(3)
+#define EDGE_RATE_CNTL_MASK		(0x00E0)
+#define RMII_CLK_OUT_ENABLE_POS		(4)
+#define RMII_CLK_OUT_ENABLE_WIDTH	(1)
+#define RMII_CLK_OUT_ENABLE_MASK	(0x10)
+
+/* Token Ring Page 0x52B5 Registers */
+#define MSCC_PHY_REG_TR_ADDR_16		16
+#define MSCC_PHY_REG_TR_DATA_17		17
+#define MSCC_PHY_REG_TR_DATA_18		18
+
+/* Token Ring - Read Value in */
+#define MSCC_PHY_TR_16_READ		(0xA000)
+/* Token Ring - Write Value out */
+#define MSCC_PHY_TR_16_WRITE		(0x8000)
+
+/* Token Ring Registers */
+#define MSCC_PHY_TR_LINKDETCTRL_POS	(3)
+#define MSCC_PHY_TR_LINKDETCTRL_WIDTH	(2)
+#define MSCC_PHY_TR_LINKDETCTRL_VAL	(3)
+#define MSCC_PHY_TR_LINKDETCTRL_MASK	(0x0018)
+#define MSCC_PHY_TR_LINKDETCTRL_ADDR	(0x07F8)
+
+#define MSCC_PHY_TR_VGATHRESH100_POS	(0)
+#define MSCC_PHY_TR_VGATHRESH100_WIDTH	(7)
+#define MSCC_PHY_TR_VGATHRESH100_VAL	(0x0018)
+#define MSCC_PHY_TR_VGATHRESH100_MASK	(0x007f)
+#define MSCC_PHY_TR_VGATHRESH100_ADDR	(0x0FA4)
+
+#define MSCC_PHY_TR_VGAGAIN10_U_POS	(0)
+#define MSCC_PHY_TR_VGAGAIN10_U_WIDTH	(1)
+#define MSCC_PHY_TR_VGAGAIN10_U_MASK	(0x0001)
+#define MSCC_PHY_TR_VGAGAIN10_U_VAL	(0)
+
+#define MSCC_PHY_TR_VGAGAIN10_L_POS	(12)
+#define MSCC_PHY_TR_VGAGAIN10_L_WIDTH	(4)
+#define MSCC_PHY_TR_VGAGAIN10_L_MASK	(0xf000)
+#define MSCC_PHY_TR_VGAGAIN10_L_VAL	(0x0001)
+#define MSCC_PHY_TR_VGAGAIN10_ADDR	(0x0F92)
+
+/* General Timeout Values */
+#define MSCC_PHY_RESET_TIMEOUT		(100)
+#define MSCC_PHY_MICRO_TIMEOUT		(500)
+
+/* RGMII/GMII Clock Delay (Skew) Options */ enum vsc_phy_rgmii_skew {
+	VSC_PHY_RGMII_DELAY_200_PS,
+	VSC_PHY_RGMII_DELAY_800_PS,
+	VSC_PHY_RGMII_DELAY_1100_PS,
+	VSC_PHY_RGMII_DELAY_1700_PS,
+	VSC_PHY_RGMII_DELAY_2000_PS,
+	VSC_PHY_RGMII_DELAY_2300_PS,
+	VSC_PHY_RGMII_DELAY_2600_PS,
+	VSC_PHY_RGMII_DELAY_3400_PS,
+};
+
+/* MAC i/f Clock Edge Rage Control (Slew), See Reg27E2  */ enum 
+vsc_phy_clk_slew {
+	VSC_PHY_CLK_SLEW_RATE_0,
+	VSC_PHY_CLK_SLEW_RATE_1,
+	VSC_PHY_CLK_SLEW_RATE_2,
+	VSC_PHY_CLK_SLEW_RATE_3,
+	VSC_PHY_CLK_SLEW_RATE_4,
+	VSC_PHY_CLK_SLEW_RATE_5,
+	VSC_PHY_CLK_SLEW_RATE_6,
+	VSC_PHY_CLK_SLEW_RATE_7,
+};
+
+
+static int mscc_vsc8531_vsc8541_init_scripts(struct phy_device *phydev) 
+{
+	u16	reg_val;
+
+	/* Set to Access Token Ring Registers */
+	phy_write(phydev, MDIO_DEVAD_NONE,
+		  MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_TR);
+
+	/* Update LinkDetectCtrl default to optimized values */
+	/* Determined during Silicon Validation Testing */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_ADDR_16,
+		  (MSCC_PHY_TR_LINKDETCTRL_ADDR | MSCC_PHY_TR_16_READ));
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_17);
+	reg_val = bitfield_replace(reg_val, MSCC_PHY_TR_LINKDETCTRL_POS,
+				   MSCC_PHY_TR_LINKDETCTRL_WIDTH,
+				   MSCC_PHY_TR_LINKDETCTRL_VAL);
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_17, reg_val);
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_ADDR_16,
+		  (MSCC_PHY_TR_LINKDETCTRL_ADDR | MSCC_PHY_TR_16_WRITE));
+
+	/* Update VgaThresh100 defaults to optimized values */
+	/* Determined during Silicon Validation Testing */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_ADDR_16,
+		  (MSCC_PHY_TR_VGATHRESH100_ADDR | MSCC_PHY_TR_16_READ));
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_18);
+	reg_val = bitfield_replace(reg_val, MSCC_PHY_TR_VGATHRESH100_POS,
+				   MSCC_PHY_TR_VGATHRESH100_WIDTH,
+				   MSCC_PHY_TR_VGATHRESH100_VAL);
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_18, reg_val);
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_ADDR_16,
+		  (MSCC_PHY_TR_VGATHRESH100_ADDR | MSCC_PHY_TR_16_WRITE));
+
+	/* Update VgaGain10 defaults to optimized values */
+	/* Determined during Silicon Validation Testing */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_ADDR_16,
+		  (MSCC_PHY_TR_VGAGAIN10_ADDR | MSCC_PHY_TR_16_READ));
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_18);
+	reg_val = bitfield_replace(reg_val, MSCC_PHY_TR_VGAGAIN10_U_POS,
+				   MSCC_PHY_TR_VGAGAIN10_U_WIDTH,
+				   MSCC_PHY_TR_VGAGAIN10_U_VAL);
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_18, reg_val);
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_17);
+	reg_val = bitfield_replace(reg_val, MSCC_PHY_TR_VGAGAIN10_L_POS,
+				   MSCC_PHY_TR_VGAGAIN10_L_WIDTH,
+				   MSCC_PHY_TR_VGAGAIN10_L_VAL);
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_DATA_17, reg_val);
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_REG_TR_ADDR_16,
+		  (MSCC_PHY_TR_VGAGAIN10_ADDR | MSCC_PHY_TR_16_WRITE));
+
+	/* Set back to Access Standard Page Registers */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_STD);
+
+	return 0;
+}
+
+static int mscc_parse_status(struct phy_device *phydev) {
+	u16 speed;
+	u16 mii_reg;
+
+	mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MIIM_AUX_CNTRL_STAT_REG);
+
+	if (mii_reg & MIIM_AUX_CNTRL_STAT_F_DUPLEX)
+		phydev->duplex = DUPLEX_FULL;
+	else
+		phydev->duplex = DUPLEX_HALF;
+
+	speed = mii_reg & MIIM_AUX_CNTRL_STAT_SPEED_MASK;
+	speed = speed >> MIIM_AUX_CNTRL_STAT_SPEED_POS;
+
+	switch (speed) {
+	case MIIM_AUX_CNTRL_STAT_SPEED_1000M:
+		phydev->speed = SPEED_1000;
+		break;
+	case MIIM_AUX_CNTRL_STAT_SPEED_100M:
+		phydev->speed = SPEED_100;
+		break;
+	case MIIM_AUX_CNTRL_STAT_SPEED_10M:
+		phydev->speed = SPEED_10;
+		break;
+	default:
+		phydev->speed = SPEED_10;
+		break;
+	}
+
+	return 0;
+}
+
+static int mscc_startup(struct phy_device *phydev) {
+	int retval;
+
+	retval = genphy_update_link(phydev);
+
+	if (retval)
+		return retval;
+
+	return mscc_parse_status(phydev);
+}
+
+static int mscc_phy_soft_reset(struct phy_device *phydev) {
+	int     retval = 0;
+	u16     timeout = MSCC_PHY_RESET_TIMEOUT;
+	u16     reg_val = 0;
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_STD);
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+	phy_write(phydev, MDIO_DEVAD_NONE, MII_BMCR, (reg_val | BMCR_RESET));
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+
+	while ((reg_val & BMCR_RESET) && (timeout > 0)) {
+		reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+		timeout--;
+		udelay(1000);   /* 1 ms */
+	}
+
+	if (timeout == 0) {
+		printf("MSCC PHY Soft_Reset Error: mac i/f = 0x%x\n",
+		       phydev->interface);
+		retval = -ETIME;
+	}
+
+	return retval;
+}
+
+static int vsc8531_vsc8541_mac_config(struct phy_device *phydev) {
+	u16	reg_val = 0;
+	u16	mac_if = 0;
+	u16	rx_clk_out = 0;
+
+	/* For VSC8530/31 the only MAC modes are RMII/RGMII. */
+	/* For VSC8540/41 the only MAC modes are (G)MII and RMII/RGMII. */
+	/* Setup MAC Configuration */
+	switch (phydev->interface) {
+	case PHY_INTERFACE_MODE_MII:
+	case PHY_INTERFACE_MODE_GMII:
+		/* Set Reg23.12:11=0 */
+		mac_if = MAC_IF_SELECTION_GMII;
+		/* Set Reg20E2.11=1 */
+		rx_clk_out = RX_CLK_OUT_DISABLE;
+		break;
+
+	case PHY_INTERFACE_MODE_RMII:
+		/* Set Reg23.12:11=1 */
+		mac_if = MAC_IF_SELECTION_RMII;
+		/* Set Reg20E2.11=0 */
+		rx_clk_out = RX_CLK_OUT_NORMAL;
+		break;
+
+	case PHY_INTERFACE_MODE_RGMII:
+		/* Set Reg23.12:11=2 */
+		mac_if = MAC_IF_SELECTION_RGMII;
+		/* Set Reg20E2.11=0 */
+		rx_clk_out = RX_CLK_OUT_NORMAL;
+		break;
+
+	default:
+		printf("MSCC PHY - INVALID MAC i/f Config: mac i/f = 0x%x\n",
+		       phydev->interface);
+		return -EINVAL;
+	}
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_STD);
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE,
+			   MSCC_PHY_EXT_PHY_CNTL_1_REG);
+	/* Set MAC i/f bits Reg23.12:11 */
+	reg_val = bitfield_replace(reg_val, MAC_IF_SELECTION_POS,
+				   MAC_IF_SELECTION_WIDTH, mac_if);
+	/* Update Reg23.12:11 */
+	phy_write(phydev, MDIO_DEVAD_NONE,
+		  MSCC_PHY_EXT_PHY_CNTL_1_REG, reg_val);
+	/* Setup ExtPg_2 Register Access */
+	phy_write(phydev, MDIO_DEVAD_NONE,
+		  MSCC_EXT_PAGE_ACCESS, MSCC_PHY_PAGE_EXT2);
+	/* Read Reg20E2 */
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE,
+			   MSCC_PHY_RGMII_CNTL_REG);
+	reg_val = bitfield_replace(reg_val, RX_CLK_OUT_POS,
+				   RX_CLK_OUT_WIDTH, rx_clk_out);
+	/* Update Reg20E2.11 */
+	phy_write(phydev, MDIO_DEVAD_NONE,
+		  MSCC_PHY_RGMII_CNTL_REG, reg_val);
+	/* Before leaving - Change back to Std Page Register Access */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_STD);
+
+	return 0;
+}
+
+static int vsc8531_config(struct phy_device *phydev) {
+	int  retval = -EINVAL;
+	u16  reg_val;
+	u16  rmii_clk_out;
+	enum vsc_phy_rgmii_skew  rx_clk_skew = VSC_PHY_RGMII_DELAY_1700_PS;
+	enum vsc_phy_rgmii_skew  tx_clk_skew = VSC_PHY_RGMII_DELAY_800_PS;
+	enum vsc_phy_clk_slew    edge_rate = VSC_PHY_CLK_SLEW_RATE_4;
+
+	/* For VSC8530/31 and VSC8540/41 the init scripts are the same */
+	mscc_vsc8531_vsc8541_init_scripts(phydev);
+
+	/* For VSC8530/31 the only MAC modes are RMII/RGMII. */
+	switch (phydev->interface) {
+	case PHY_INTERFACE_MODE_RMII:
+	case PHY_INTERFACE_MODE_RGMII:
+		retval = vsc8531_vsc8541_mac_config(phydev);
+		if (retval != 0)
+			return retval;
+
+		retval = mscc_phy_soft_reset(phydev);
+		if (retval != 0)
+			return retval;
+		break;
+	default:
+		printf("PHY 8530/31 MAC i/f Config Error: mac i/f = 0x%x\n",
+		       phydev->interface);
+		return -EINVAL;
+	}
+	/* Default RMII Clk Output to 0=OFF/1=ON  */
+	rmii_clk_out = 0;
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_EXT2);
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_RGMII_CNTL_REG);
+
+	/* Reg20E2 - Update RGMII RX_Clk Skews. */
+	reg_val = bitfield_replace(reg_val, RGMII_RX_CLK_DELAY_POS,
+				   RGMII_RX_CLK_DELAY_WIDTH, rx_clk_skew);
+	/* Reg20E2 - Update RGMII TX_Clk Skews. */
+	reg_val = bitfield_replace(reg_val, RGMII_TX_CLK_DELAY_POS,
+				   RGMII_TX_CLK_DELAY_WIDTH, tx_clk_skew);
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_RGMII_CNTL_REG, reg_val);
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_WOL_MAC_CONTROL);
+	/* Reg27E2 - Update Clk Slew Rate. */
+	reg_val = bitfield_replace(reg_val, EDGE_RATE_CNTL_POS,
+				   EDGE_RATE_CNTL_WIDTH, edge_rate);
+	/* Reg27E2 - Update RMII Clk Out. */
+	reg_val = bitfield_replace(reg_val, RMII_CLK_OUT_ENABLE_POS,
+				   RMII_CLK_OUT_ENABLE_WIDTH, rmii_clk_out);
+	/* Update Reg27E2 */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_WOL_MAC_CONTROL, reg_val);
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_STD);
+
+	return genphy_config_aneg(phydev);
+}
+
+static int vsc8541_config(struct phy_device *phydev) {
+	int  retval = -EINVAL;
+	u16  reg_val;
+	u16  rmii_clk_out;
+	enum vsc_phy_rgmii_skew  rx_clk_skew = VSC_PHY_RGMII_DELAY_1700_PS;
+	enum vsc_phy_rgmii_skew  tx_clk_skew = VSC_PHY_RGMII_DELAY_800_PS;
+	enum vsc_phy_clk_slew    edge_rate = VSC_PHY_CLK_SLEW_RATE_4;
+
+	/* For VSC8530/31 and VSC8540/41 the init scripts are the same */
+	mscc_vsc8531_vsc8541_init_scripts(phydev);
+
+	/* For VSC8540/41 the only MAC modes are (G)MII and RMII/RGMII. */
+	switch (phydev->interface) {
+	case PHY_INTERFACE_MODE_MII:
+	case PHY_INTERFACE_MODE_GMII:
+	case PHY_INTERFACE_MODE_RMII:
+	case PHY_INTERFACE_MODE_RGMII:
+		retval = vsc8531_vsc8541_mac_config(phydev);
+		if (retval != 0)
+			return retval;
+
+		retval = mscc_phy_soft_reset(phydev);
+		if (retval != 0)
+			return retval;
+		break;
+	default:
+		printf("PHY 8541 MAC i/f config Error: mac i/f = 0x%x\n",
+		       phydev->interface);
+		return -EINVAL;
+	}
+	/* Default RMII Clk Output to 0=OFF/1=ON  */
+	rmii_clk_out = 0;
+
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_EXT2);
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_RGMII_CNTL_REG);
+	/* Reg20E2 - Update RGMII RX_Clk Skews. */
+	reg_val = bitfield_replace(reg_val, RGMII_RX_CLK_DELAY_POS,
+				   RGMII_RX_CLK_DELAY_WIDTH, rx_clk_skew);
+	/* Reg20E2 - Update RGMII TX_Clk Skews. */
+	reg_val = bitfield_replace(reg_val, RGMII_TX_CLK_DELAY_POS,
+				   RGMII_TX_CLK_DELAY_WIDTH, tx_clk_skew);
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_RGMII_CNTL_REG, reg_val);
+
+	reg_val = phy_read(phydev, MDIO_DEVAD_NONE, MSCC_PHY_WOL_MAC_CONTROL);
+	/* Reg27E2 - Update Clk Slew Rate. */
+	reg_val = bitfield_replace(reg_val, EDGE_RATE_CNTL_POS,
+				   EDGE_RATE_CNTL_WIDTH, edge_rate);
+	/* Reg27E2 - Update RMII Clk Out. */
+	reg_val = bitfield_replace(reg_val, RMII_CLK_OUT_ENABLE_POS,
+				   RMII_CLK_OUT_ENABLE_WIDTH, rmii_clk_out);
+	/* Update Reg27E2 */
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_PHY_WOL_MAC_CONTROL, reg_val);
+	phy_write(phydev, MDIO_DEVAD_NONE, MSCC_EXT_PAGE_ACCESS,
+		  MSCC_PHY_PAGE_STD);
+
+	return genphy_config_aneg(phydev);
+}
+
+static struct phy_driver VSC8530_driver = {
+	.name = "Microsemi VSC8530",
+	.uid = PHY_ID_VSC8530,
+	.mask = 0x000ffff0,
+	.features = PHY_BASIC_FEATURES,
+	.config = &vsc8531_config,
+	.startup = &mscc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver VSC8531_driver = {
+	.name = "Microsemi VSC8531",
+	.uid = PHY_ID_VSC8531,
+	.mask = 0x000ffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &vsc8531_config,
+	.startup = &mscc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver VSC8540_driver = {
+	.name = "Microsemi VSC8540",
+	.uid = PHY_ID_VSC8540,
+	.mask = 0x000ffff0,
+	.features = PHY_BASIC_FEATURES,
+	.config = &vsc8541_config,
+	.startup = &mscc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+static struct phy_driver VSC8541_driver = {
+	.name = "Microsemi VSC8541",
+	.uid = PHY_ID_VSC8541,
+	.mask = 0x000ffff0,
+	.features = PHY_GBIT_FEATURES,
+	.config = &vsc8541_config,
+	.startup = &mscc_startup,
+	.shutdown = &genphy_shutdown,
+};
+
+int phy_mscc_init(void)
+{
+	phy_register(&VSC8530_driver);
+	phy_register(&VSC8531_driver);
+	phy_register(&VSC8540_driver);
+	phy_register(&VSC8541_driver);
+
+	return 0;
+}
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 80bdfb6..8db6574 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -512,6 +512,9 @@ int phy_init(void)
 #ifdef CONFIG_PHY_XILINX
    phy_xilinx_init();
 #endif
+#ifdef CONFIG_PHY_MSCC
+	phy_mscc_init();
+#endif
return 0;
 }
diff --git a/include/config_phylib_all_drivers.h b/include/config_phylib_all_drivers.h
index 12828c6..d2965ed 100644
--- a/include/config_phylib_all_drivers.h
+++ b/include/config_phylib_all_drivers.h
@@ -14,6 +14,7 @@
#ifdef CONFIG_PHYLIB
+#define CONFIG_PHY_MSCC
 #define CONFIG_PHY_VITESSE
 #define CONFIG_PHY_MARVELL
 #define CONFIG_PHY_MICREL
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h index ec70b72..694e249 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -433,6 +433,9 @@
 #define CONFIG_PHY_SMSC
 /* Enable Atheros phy driver */
 #define CONFIG_PHY_ATHEROS
+/* Enable MSCC phy driver */
+#define CONFIG_PHY_MSCC
+
/*
  * NOR Size = 16 MiB
diff --git a/include/phy.h b/include/phy.h index 268d9a1..5477496 100644
--- a/include/phy.h
+++ b/include/phy.h
@@ -266,6 +266,7 @@ int phy_teranetics_init(void);  int phy_ti_init(void);  int phy_vitesse_init(void);  int phy_xilinx_init(void);
+int phy_mscc_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);
--
1.9.1

    