drivers/net/keystone_net.c - platform/external/u-boot - Gitiles

 /*
  * 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);
 }
	/*
	* 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 + x4 /
	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);
	}