keystone2: net: add keystone ethernet driver

Ethernet driver configures the CPSW, SGMI and Phy and uses
the the Navigator APIs. The driver supports 4 Ethernet ports and
can work with only one port at a time.

Port configurations are defined in board.c.

Signed-off-by: Vitaly Andrianov <vitalya@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: WingMan Kwok <w-kwok2@ti.com>

1 files changed, 716 insertions, 0 deletions

diff --git a/drivers/net/keystone_net.c b/drivers/net/keystone_net.c
new file mode 100644
index 0000000000..f95c928076
--- /dev/null
+++ b/drivers/net/keystone_net.c
@@ -0,0 +1,716 @@
+/*
+ * Ethernet driver for TI K2HK EVM.
+ *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+#include <common.h>
+#include <command.h>
+
+#include <net.h>
+#include <miiphy.h>
+#include <malloc.h>
+#include <asm/arch/emac_defs.h>
+#include <asm/arch/psc_defs.h>
+#include <asm/arch/keystone_nav.h>
+
+unsigned int emac_dbg;
+
+unsigned int emac_open;
+static unsigned int sys_has_mdio = 1;
+
+#ifdef KEYSTONE2_EMAC_GIG_ENABLE
+#define emac_gigabit_enable(x)	keystone2_eth_gigabit_enable(x)
+#else
+#define emac_gigabit_enable(x)	/* no gigabit to enable */
+#endif
+
+#define RX_BUFF_NUMS	24
+#define RX_BUFF_LEN	1520
+#define MAX_SIZE_STREAM_BUFFER RX_BUFF_LEN
+
+static u8 rx_buffs[RX_BUFF_NUMS * RX_BUFF_LEN] __aligned(16);
+
+struct rx_buff_desc net_rx_buffs = {
+	.buff_ptr	= rx_buffs,
+	.num_buffs	= RX_BUFF_NUMS,
+	.buff_len	= RX_BUFF_LEN,
+	.rx_flow	= 22,
+};
+
+static void keystone2_eth_mdio_enable(void);
+
+static int gen_get_link_speed(int phy_addr);
+
+/* EMAC Addresses */
+static volatile struct emac_regs	*adap_emac =
+	(struct emac_regs *)EMAC_EMACSL_BASE_ADDR;
+static volatile struct mdio_regs	*adap_mdio =
+	(struct mdio_regs *)EMAC_MDIO_BASE_ADDR;
+
+int keystone2_eth_read_mac_addr(struct eth_device *dev)
+{
+	struct eth_priv_t *eth_priv;
+	u32 maca = 0;
+	u32 macb = 0;
+
+	eth_priv = (struct eth_priv_t *)dev->priv;
+
+	/* Read the e-fuse mac address */
+	if (eth_priv->slave_port == 1) {
+		maca = __raw_readl(MAC_ID_BASE_ADDR);
+		macb = __raw_readl(MAC_ID_BASE_ADDR + 4);
+	}
+
+	dev->enetaddr[0] = (macb >>  8) & 0xff;
+	dev->enetaddr[1] = (macb >>  0) & 0xff;
+	dev->enetaddr[2] = (maca >> 24) & 0xff;
+	dev->enetaddr[3] = (maca >> 16) & 0xff;
+	dev->enetaddr[4] = (maca >>  8) & 0xff;
+	dev->enetaddr[5] = (maca >>  0) & 0xff;
+
+	return 0;
+}
+
+static void keystone2_eth_mdio_enable(void)
+{
+	u_int32_t	clkdiv;
+
+	clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
+
+	writel((clkdiv & 0xffff) |
+	       MDIO_CONTROL_ENABLE |
+	       MDIO_CONTROL_FAULT |
+	       MDIO_CONTROL_FAULT_ENABLE,
+	       &adap_mdio->control);
+
+	while (readl(&adap_mdio->control) & MDIO_CONTROL_IDLE)
+		;
+}
+
+/* Read a PHY register via MDIO inteface. Returns 1 on success, 0 otherwise */
+int keystone2_eth_phy_read(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t *data)
+{
+	int	tmp;
+
+	while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
+		;
+
+	writel(MDIO_USERACCESS0_GO |
+	       MDIO_USERACCESS0_WRITE_READ |
+	       ((reg_num & 0x1f) << 21) |
+	       ((phy_addr & 0x1f) << 16),
+	       &adap_mdio->useraccess0);
+
+	/* Wait for command to complete */
+	while ((tmp = readl(&adap_mdio->useraccess0)) & MDIO_USERACCESS0_GO)
+		;
+
+	if (tmp & MDIO_USERACCESS0_ACK) {
+		*data = tmp & 0xffff;
+		return 0;
+	}
+
+	*data = -1;
+	return -1;
+}
+
+/*
+ * Write to a PHY register via MDIO inteface.
+ * Blocks until operation is complete.
+ */
+int keystone2_eth_phy_write(u_int8_t phy_addr, u_int8_t reg_num, u_int16_t data)
+{
+	while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
+		;
+
+	writel(MDIO_USERACCESS0_GO |
+	       MDIO_USERACCESS0_WRITE_WRITE |
+	       ((reg_num & 0x1f) << 21) |
+	       ((phy_addr & 0x1f) << 16) |
+	       (data & 0xffff),
+	       &adap_mdio->useraccess0);
+
+	/* Wait for command to complete */
+	while (readl(&adap_mdio->useraccess0) & MDIO_USERACCESS0_GO)
+		;
+
+	return 0;
+}
+
+/* PHY functions for a generic PHY */
+static int gen_get_link_speed(int phy_addr)
+{
+	u_int16_t	tmp;
+
+	if ((!keystone2_eth_phy_read(phy_addr, MII_STATUS_REG, &tmp)) &&
+	    (tmp & 0x04)) {
+		return 0;
+	}
+
+	return -1;
+}
+
+static void  __attribute__((unused))
+	keystone2_eth_gigabit_enable(struct eth_device *dev)
+{
+	u_int16_t data;
+	struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
+
+	if (sys_has_mdio) {
+		if (keystone2_eth_phy_read(eth_priv->phy_addr, 0, &data) ||
+		    !(data & (1 << 6))) /* speed selection MSB */
+			return;
+	}
+
+	/*
+	 * Check if link detected is giga-bit
+	 * If Gigabit mode detected, enable gigbit in MAC
+	 */
+	writel(readl(&(adap_emac[eth_priv->slave_port - 1].maccontrol)) |
+	       EMAC_MACCONTROL_GIGFORCE | EMAC_MACCONTROL_GIGABIT_ENABLE,
+	       &(adap_emac[eth_priv->slave_port - 1].maccontrol))
+		;
+}
+
+int keystone_sgmii_link_status(int port)
+{
+	u32 status = 0;
+
+	status = __raw_readl(SGMII_STATUS_REG(port));
+
+	return status & SGMII_REG_STATUS_LINK;
+}
+
+
+int keystone_get_link_status(struct eth_device *dev)
+{
+	struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
+	int sgmii_link;
+	int link_state = 0;
+#if CONFIG_GET_LINK_STATUS_ATTEMPTS > 1
+	int j;
+
+	for (j = 0; (j < CONFIG_GET_LINK_STATUS_ATTEMPTS) && (link_state == 0);
+	     j++) {
+#endif
+		sgmii_link =
+			keystone_sgmii_link_status(eth_priv->slave_port - 1);
+
+		if (sgmii_link) {
+			link_state = 1;
+
+			if (eth_priv->sgmii_link_type == SGMII_LINK_MAC_PHY)
+				if (gen_get_link_speed(eth_priv->phy_addr))
+					link_state = 0;
+		}
+#if CONFIG_GET_LINK_STATUS_ATTEMPTS > 1
+	}
+#endif
+	return link_state;
+}
+
+int keystone_sgmii_config(int port, int interface)
+{
+	unsigned int i, status, mask;
+	unsigned int mr_adv_ability, control;
+
+	switch (interface) {
+	case SGMII_LINK_MAC_MAC_AUTONEG:
+		mr_adv_ability	= (SGMII_REG_MR_ADV_ENABLE |
+				   SGMII_REG_MR_ADV_LINK |
+				   SGMII_REG_MR_ADV_FULL_DUPLEX |
+				   SGMII_REG_MR_ADV_GIG_MODE);
+		control		= (SGMII_REG_CONTROL_MASTER |
+				   SGMII_REG_CONTROL_AUTONEG);
+
+		break;
+	case SGMII_LINK_MAC_PHY:
+	case SGMII_LINK_MAC_PHY_FORCED:
+		mr_adv_ability	= SGMII_REG_MR_ADV_ENABLE;
+		control		= SGMII_REG_CONTROL_AUTONEG;
+
+		break;
+	case SGMII_LINK_MAC_MAC_FORCED:
+		mr_adv_ability	= (SGMII_REG_MR_ADV_ENABLE |
+				   SGMII_REG_MR_ADV_LINK |
+				   SGMII_REG_MR_ADV_FULL_DUPLEX |
+				   SGMII_REG_MR_ADV_GIG_MODE);
+		control		= SGMII_REG_CONTROL_MASTER;
+
+		break;
+	case SGMII_LINK_MAC_FIBER:
+		mr_adv_ability	= 0x20;
+		control		= SGMII_REG_CONTROL_AUTONEG;
+
+		break;
+	default:
+		mr_adv_ability	= SGMII_REG_MR_ADV_ENABLE;
+		control		= SGMII_REG_CONTROL_AUTONEG;
+	}
+
+	__raw_writel(0, SGMII_CTL_REG(port));
+
+	/*
+	 * Wait for the SerDes pll to lock,
+	 * but don't trap if lock is never read
+	 */
+	for (i = 0; i < 1000; i++)  {
+		udelay(2000);
+		status = __raw_readl(SGMII_STATUS_REG(port));
+		if ((status & SGMII_REG_STATUS_LOCK) != 0)
+			break;
+	}
+
+	__raw_writel(mr_adv_ability, SGMII_MRADV_REG(port));
+	__raw_writel(control, SGMII_CTL_REG(port));
+
+
+	mask = SGMII_REG_STATUS_LINK;
+
+	if (control & SGMII_REG_CONTROL_AUTONEG)
+		mask |= SGMII_REG_STATUS_AUTONEG;
+
+	for (i = 0; i < 1000; i++) {
+		status = __raw_readl(SGMII_STATUS_REG(port));
+		if ((status & mask) == mask)
+			break;
+	}
+
+	return 0;
+}
+
+int mac_sl_reset(u32 port)
+{
+	u32 i, v;
+
+	if (port >= DEVICE_N_GMACSL_PORTS)
+		return GMACSL_RET_INVALID_PORT;
+
+	/* Set the soft reset bit */
+	DEVICE_REG32_W(DEVICE_EMACSL_BASE(port) +
+		       CPGMACSL_REG_RESET, CPGMAC_REG_RESET_VAL_RESET);
+
+	/* Wait for the bit to clear */
+	for (i = 0; i < DEVICE_EMACSL_RESET_POLL_COUNT; i++) {
+		v = DEVICE_REG32_R(DEVICE_EMACSL_BASE(port) +
+				   CPGMACSL_REG_RESET);
+		if ((v & CPGMAC_REG_RESET_VAL_RESET_MASK) !=
+		    CPGMAC_REG_RESET_VAL_RESET)
+			return GMACSL_RET_OK;
+	}
+
+	/* Timeout on the reset */
+	return GMACSL_RET_WARN_RESET_INCOMPLETE;
+}
+
+int mac_sl_config(u_int16_t port, struct mac_sl_cfg *cfg)
+{
+	u32 v, i;
+	int ret = GMACSL_RET_OK;
+
+	if (port >= DEVICE_N_GMACSL_PORTS)
+		return GMACSL_RET_INVALID_PORT;
+
+	if (cfg->max_rx_len > CPGMAC_REG_MAXLEN_LEN) {
+		cfg->max_rx_len = CPGMAC_REG_MAXLEN_LEN;
+		ret = GMACSL_RET_WARN_MAXLEN_TOO_BIG;
+	}
+
+	/* Must wait if the device is undergoing reset */
+	for (i = 0; i < DEVICE_EMACSL_RESET_POLL_COUNT; i++) {
+		v = DEVICE_REG32_R(DEVICE_EMACSL_BASE(port) +
+				   CPGMACSL_REG_RESET);
+		if ((v & CPGMAC_REG_RESET_VAL_RESET_MASK) !=
+		    CPGMAC_REG_RESET_VAL_RESET)
+			break;
+	}
+
+	if (i == DEVICE_EMACSL_RESET_POLL_COUNT)
+		return GMACSL_RET_CONFIG_FAIL_RESET_ACTIVE;
+
+	DEVICE_REG32_W(DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_MAXLEN,
+		       cfg->max_rx_len);
+
+	DEVICE_REG32_W(DEVICE_EMACSL_BASE(port) + CPGMACSL_REG_CTL,
+		       cfg->ctl);
+
+	return ret;
+}
+
+int ethss_config(u32 ctl, u32 max_pkt_size)
+{
+	u32 i;
+
+	/* Max length register */
+	DEVICE_REG32_W(DEVICE_CPSW_BASE + CPSW_REG_MAXLEN, max_pkt_size);
+
+	/* Control register */
+	DEVICE_REG32_W(DEVICE_CPSW_BASE + CPSW_REG_CTL, ctl);
+
+	/* All statistics enabled by default */
+	DEVICE_REG32_W(DEVICE_CPSW_BASE + CPSW_REG_STAT_PORT_EN,
+		       CPSW_REG_VAL_STAT_ENABLE_ALL);
+
+	/* Reset and enable the ALE */
+	DEVICE_REG32_W(DEVICE_CPSW_BASE + CPSW_REG_ALE_CONTROL,
+		       CPSW_REG_VAL_ALE_CTL_RESET_AND_ENABLE |
+		       CPSW_REG_VAL_ALE_CTL_BYPASS);
+
+	/* All ports put into forward mode */
+	for (i = 0; i < DEVICE_CPSW_NUM_PORTS; i++)
+		DEVICE_REG32_W(DEVICE_CPSW_BASE + CPSW_REG_ALE_PORTCTL(i),
+			       CPSW_REG_VAL_PORTCTL_FORWARD_MODE);
+
+	return 0;
+}
+
+int ethss_start(void)
+{
+	int i;
+	struct mac_sl_cfg cfg;
+
+	cfg.max_rx_len	= MAX_SIZE_STREAM_BUFFER;
+	cfg.ctl		= GMACSL_ENABLE | GMACSL_RX_ENABLE_EXT_CTL;
+
+	for (i = 0; i < DEVICE_N_GMACSL_PORTS; i++) {
+		mac_sl_reset(i);
+		mac_sl_config(i, &cfg);
+	}
+
+	return 0;
+}
+
+int ethss_stop(void)
+{
+	int i;
+
+	for (i = 0; i < DEVICE_N_GMACSL_PORTS; i++)
+		mac_sl_reset(i);
+
+	return 0;
+}
+
+int32_t cpmac_drv_send(u32 *buffer, int num_bytes, int slave_port_num)
+{
+	if (num_bytes < EMAC_MIN_ETHERNET_PKT_SIZE)
+		num_bytes = EMAC_MIN_ETHERNET_PKT_SIZE;
+
+	return netcp_send(buffer, num_bytes, (slave_port_num) << 16);
+}
+
+/* Eth device open */
+static int keystone2_eth_open(struct eth_device *dev, bd_t *bis)
+{
+	u_int32_t clkdiv;
+	int link;
+	struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
+
+	debug("+ emac_open\n");
+
+	net_rx_buffs.rx_flow	= eth_priv->rx_flow;
+
+	sys_has_mdio =
+		(eth_priv->sgmii_link_type == SGMII_LINK_MAC_PHY) ? 1 : 0;
+
+	psc_enable_module(KS2_LPSC_PA);
+	psc_enable_module(KS2_LPSC_CPGMAC);
+
+	sgmii_serdes_setup_156p25mhz();
+
+	if (sys_has_mdio)
+		keystone2_eth_mdio_enable();
+
+	keystone_sgmii_config(eth_priv->slave_port - 1,
+			      eth_priv->sgmii_link_type);
+
+	udelay(10000);
+
+	/* On chip switch configuration */
+	ethss_config(target_get_switch_ctl(), SWITCH_MAX_PKT_SIZE);
+
+	/* TODO: add error handling code */
+	if (qm_init()) {
+		printf("ERROR: qm_init()\n");
+		return -1;
+	}
+	if (netcp_init(&net_rx_buffs)) {
+		qm_close();
+		printf("ERROR: netcp_init()\n");
+		return -1;
+	}
+
+	/*
+	 * Streaming switch configuration. If not present this
+	 * statement is defined to void in target.h.
+	 * If present this is usually defined to a series of register writes
+	 */
+	hw_config_streaming_switch();
+
+	if (sys_has_mdio) {
+		/* Init MDIO & get link state */
+		clkdiv = (EMAC_MDIO_BUS_FREQ / EMAC_MDIO_CLOCK_FREQ) - 1;
+		writel((clkdiv & 0xff) | MDIO_CONTROL_ENABLE |
+		       MDIO_CONTROL_FAULT, &adap_mdio->control)
+			;
+
+		/* We need to wait for MDIO to start */
+		udelay(1000);
+
+		link = keystone_get_link_status(dev);
+		if (link == 0) {
+			netcp_close();
+			qm_close();
+			return -1;
+		}
+	}
+
+	emac_gigabit_enable(dev);
+
+	ethss_start();
+
+	debug("- emac_open\n");
+
+	emac_open = 1;
+
+	return 0;
+}
+
+/* Eth device close */
+void keystone2_eth_close(struct eth_device *dev)
+{
+	debug("+ emac_close\n");
+
+	if (!emac_open)
+		return;
+
+	ethss_stop();
+
+	netcp_close();
+	qm_close();
+
+	emac_open = 0;
+
+	debug("- emac_close\n");
+}
+
+static int tx_send_loop;
+
+/*
+ * This function sends a single packet on the network and returns
+ * positive number (number of bytes transmitted) or negative for error
+ */
+static int keystone2_eth_send_packet(struct eth_device *dev,
+					void *packet, int length)
+{
+	int ret_status = -1;
+	struct eth_priv_t *eth_priv = (struct eth_priv_t *)dev->priv;
+
+	tx_send_loop = 0;
+
+	if (keystone_get_link_status(dev) == 0)
+		return -1;
+
+	emac_gigabit_enable(dev);
+
+	if (cpmac_drv_send((u32 *)packet, length, eth_priv->slave_port) != 0)
+		return ret_status;
+
+	if (keystone_get_link_status(dev) == 0)
+		return -1;
+
+	emac_gigabit_enable(dev);
+
+	return length;
+}
+
+/*
+ * This function handles receipt of a packet from the network
+ */
+static int keystone2_eth_rcv_packet(struct eth_device *dev)
+{
+	void *hd;
+	int  pkt_size;
+	u32  *pkt;
+
+	hd = netcp_recv(&pkt, &pkt_size);
+	if (hd == NULL)
+		return 0;
+
+	NetReceive((uchar *)pkt, pkt_size);
+
+	netcp_release_rxhd(hd);
+
+	return pkt_size;
+}
+
+/*
+ * This function initializes the EMAC hardware.
+ */
+int keystone2_emac_initialize(struct eth_priv_t *eth_priv)
+{
+	struct eth_device *dev;
+
+	dev = malloc(sizeof(struct eth_device));
+	if (dev == NULL)
+		return -1;
+
+	memset(dev, 0, sizeof(struct eth_device));
+
+	strcpy(dev->name, eth_priv->int_name);
+	dev->priv = eth_priv;
+
+	keystone2_eth_read_mac_addr(dev);
+
+	dev->iobase		= 0;
+	dev->init		= keystone2_eth_open;
+	dev->halt		= keystone2_eth_close;
+	dev->send		= keystone2_eth_send_packet;
+	dev->recv		= keystone2_eth_rcv_packet;
+
+	eth_register(dev);
+
+	return 0;
+}
+
+void sgmii_serdes_setup_156p25mhz(void)
+{
+	unsigned int cnt;
+
+	/*
+	 * configure Serializer/Deserializer (SerDes) hardware. SerDes IP
+	 * hardware vendor published only register addresses and their values
+	 * to be used for configuring SerDes. So had to use hardcoded values
+	 * below.
+	 */
+	clrsetbits_le32(0x0232a000, 0xffff0000, 0x00800000);
+	clrsetbits_le32(0x0232a014, 0x0000ffff, 0x00008282);
+	clrsetbits_le32(0x0232a060, 0x00ffffff, 0x00142438);
+	clrsetbits_le32(0x0232a064, 0x00ffff00, 0x00c3c700);
+	clrsetbits_le32(0x0232a078, 0x0000ff00, 0x0000c000);
+
+	clrsetbits_le32(0x0232a204, 0xff0000ff, 0x38000080);
+	clrsetbits_le32(0x0232a208, 0x000000ff, 0x00000000);
+	clrsetbits_le32(0x0232a20c, 0xff000000, 0x02000000);
+	clrsetbits_le32(0x0232a210, 0xff000000, 0x1b000000);
+	clrsetbits_le32(0x0232a214, 0x0000ffff, 0x00006fb8);
+	clrsetbits_le32(0x0232a218, 0xffff00ff, 0x758000e4);
+	clrsetbits_le32(0x0232a2ac, 0x0000ff00, 0x00004400);
+	clrsetbits_le32(0x0232a22c, 0x00ffff00, 0x00200800);
+	clrsetbits_le32(0x0232a280, 0x00ff00ff, 0x00820082);
+	clrsetbits_le32(0x0232a284, 0xffffffff, 0x1d0f0385);
+
+	clrsetbits_le32(0x0232a404, 0xff0000ff, 0x38000080);
+	clrsetbits_le32(0x0232a408, 0x000000ff, 0x00000000);
+	clrsetbits_le32(0x0232a40c, 0xff000000, 0x02000000);
+	clrsetbits_le32(0x0232a410, 0xff000000, 0x1b000000);
+	clrsetbits_le32(0x0232a414, 0x0000ffff, 0x00006fb8);
+	clrsetbits_le32(0x0232a418, 0xffff00ff, 0x758000e4);
+	clrsetbits_le32(0x0232a4ac, 0x0000ff00, 0x00004400);
+	clrsetbits_le32(0x0232a42c, 0x00ffff00, 0x00200800);
+	clrsetbits_le32(0x0232a480, 0x00ff00ff, 0x00820082);
+	clrsetbits_le32(0x0232a484, 0xffffffff, 0x1d0f0385);
+
+	clrsetbits_le32(0x0232a604, 0xff0000ff, 0x38000080);
+	clrsetbits_le32(0x0232a608, 0x000000ff, 0x00000000);
+	clrsetbits_le32(0x0232a60c, 0xff000000, 0x02000000);
+	clrsetbits_le32(0x0232a610, 0xff000000, 0x1b000000);
+	clrsetbits_le32(0x0232a614, 0x0000ffff, 0x00006fb8);
+	clrsetbits_le32(0x0232a618, 0xffff00ff, 0x758000e4);
+	clrsetbits_le32(0x0232a6ac, 0x0000ff00, 0x00004400);
+	clrsetbits_le32(0x0232a62c, 0x00ffff00, 0x00200800);
+	clrsetbits_le32(0x0232a680, 0x00ff00ff, 0x00820082);
+	clrsetbits_le32(0x0232a684, 0xffffffff, 0x1d0f0385);
+
+	clrsetbits_le32(0x0232a804, 0xff0000ff, 0x38000080);
+	clrsetbits_le32(0x0232a808, 0x000000ff, 0x00000000);
+	clrsetbits_le32(0x0232a80c, 0xff000000, 0x02000000);
+	clrsetbits_le32(0x0232a810, 0xff000000, 0x1b000000);
+	clrsetbits_le32(0x0232a814, 0x0000ffff, 0x00006fb8);
+	clrsetbits_le32(0x0232a818, 0xffff00ff, 0x758000e4);
+	clrsetbits_le32(0x0232a8ac, 0x0000ff00, 0x00004400);
+	clrsetbits_le32(0x0232a82c, 0x00ffff00, 0x00200800);
+	clrsetbits_le32(0x0232a880, 0x00ff00ff, 0x00820082);
+	clrsetbits_le32(0x0232a884, 0xffffffff, 0x1d0f0385);
+
+	clrsetbits_le32(0x0232aa00, 0x0000ff00, 0x00000800);
+	clrsetbits_le32(0x0232aa08, 0xffff0000, 0x38a20000);
+	clrsetbits_le32(0x0232aa30, 0x00ffff00, 0x008a8a00);
+	clrsetbits_le32(0x0232aa84, 0x0000ff00, 0x00000600);
+	clrsetbits_le32(0x0232aa94, 0xff000000, 0x10000000);
+	clrsetbits_le32(0x0232aaa0, 0xff000000, 0x81000000);
+	clrsetbits_le32(0x0232aabc, 0xff000000, 0xff000000);
+	clrsetbits_le32(0x0232aac0, 0x000000ff, 0x0000008b);
+	clrsetbits_le32(0x0232ab08, 0xffff0000, 0x583f0000);
+	clrsetbits_le32(0x0232ab0c, 0x000000ff, 0x0000004e);
+	clrsetbits_le32(0x0232a000, 0x000000ff, 0x00000003);
+	clrsetbits_le32(0x0232aa00, 0x000000ff, 0x0000005f);
+
+	clrsetbits_le32(0x0232aa48, 0x00ffff00, 0x00fd8c00);
+	clrsetbits_le32(0x0232aa54, 0x00ffffff, 0x002fec72);
+	clrsetbits_le32(0x0232aa58, 0xffffff00, 0x00f92100);
+	clrsetbits_le32(0x0232aa5c, 0xffffffff, 0x00040060);
+	clrsetbits_le32(0x0232aa60, 0xffffffff, 0x00008000);
+	clrsetbits_le32(0x0232aa64, 0xffffffff, 0x0c581220);
+	clrsetbits_le32(0x0232aa68, 0xffffffff, 0xe13b0602);
+	clrsetbits_le32(0x0232aa6c, 0xffffffff, 0xb8074cc1);
+	clrsetbits_le32(0x0232aa70, 0xffffffff, 0x3f02e989);
+	clrsetbits_le32(0x0232aa74, 0x000000ff, 0x00000001);
+	clrsetbits_le32(0x0232ab20, 0x00ff0000, 0x00370000);
+	clrsetbits_le32(0x0232ab1c, 0xff000000, 0x37000000);
+	clrsetbits_le32(0x0232ab20, 0x000000ff, 0x0000005d);
+
+	/*Bring SerDes out of Reset if SerDes is Shutdown & is in Reset Mode*/
+	clrbits_le32(0x0232a010, 1 << 28);
+
+	/* Enable TX and RX via the LANExCTL_STS 0x0000 + x*4 */
+	clrbits_le32(0x0232a228, 1 << 29);
+	writel(0xF800F8C0, 0x0232bfe0);
+	clrbits_le32(0x0232a428, 1 << 29);
+	writel(0xF800F8C0, 0x0232bfe4);
+	clrbits_le32(0x0232a628, 1 << 29);
+	writel(0xF800F8C0, 0x0232bfe8);
+	clrbits_le32(0x0232a828, 1 << 29);
+	writel(0xF800F8C0, 0x0232bfec);
+
+	/*Enable pll via the pll_ctrl 0x0014*/
+	writel(0xe0000000, 0x0232bff4)
+		;
+
+	/*Waiting for SGMII Serdes PLL lock.*/
+	for (cnt = 10000; cnt > 0 && ((readl(0x02090114) & 0x10) == 0); cnt--)
+		;
+
+	for (cnt = 10000; cnt > 0 && ((readl(0x02090214) & 0x10) == 0); cnt--)
+		;
+
+	for (cnt = 10000; cnt > 0 && ((readl(0x02090414) & 0x10) == 0); cnt--)
+		;
+
+	for (cnt = 10000; cnt > 0 && ((readl(0x02090514) & 0x10) == 0); cnt--)
+		;
+
+	udelay(45000);
+}
+
+void sgmii_serdes_shutdown(void)
+{
+	/*
+	 * shutdown SerDes hardware. SerDes hardware vendor published only
+	 * register addresses and their values. So had to use hardcoded
+	 * values below.
+	 */
+	clrbits_le32(0x0232bfe0, 3 << 29 | 3 << 13);
+	setbits_le32(0x02320228, 1 << 29);
+	clrbits_le32(0x0232bfe4, 3 << 29 | 3 << 13);
+	setbits_le32(0x02320428, 1 << 29);
+	clrbits_le32(0x0232bfe8, 3 << 29 | 3 << 13);
+	setbits_le32(0x02320628, 1 << 29);
+	clrbits_le32(0x0232bfec, 3 << 29 | 3 << 13);
+	setbits_le32(0x02320828, 1 << 29);
+
+	clrbits_le32(0x02320034, 3 << 29);
+	setbits_le32(0x02320010, 1 << 28);
+}