AX88180: new gigabit network driver

Signed-off-by: Louis Su <louis@asix.com.tw>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

1 files changed, 727 insertions, 0 deletions

diff --git a/drivers/net/ax88180.c b/drivers/net/ax88180.c
new file mode 100644
index 0000000000..d843397f34
--- /dev/null
+++ b/drivers/net/ax88180.c
@@ -0,0 +1,727 @@
+/*
+ * ax88180: ASIX AX88180 Non-PCI Gigabit Ethernet u-boot driver
+ *
+ * This program is free software; you can distribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ * This program is distributed in the hope it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ */
+
+/*
+ * ========================================================================
+ * ASIX AX88180 Non-PCI 16/32-bit Gigabit Ethernet Linux Driver
+ *
+ * The AX88180 Ethernet controller is a high performance and highly
+ * integrated local CPU bus Ethernet controller with embedded 40K bytes
+ * SRAM and supports both 16-bit and 32-bit SRAM-Like interfaces for any
+ * embedded systems.
+ * The AX88180 is a single chip 10/100/1000Mbps Gigabit Ethernet
+ * controller that supports both MII and RGMII interfaces and is
+ * compliant to IEEE 802.3, IEEE 802.3u and IEEE 802.3z standards.
+ *
+ * Please visit ASIX's web site (http://www.asix.com.tw) for more
+ * details.
+ *
+ * Module Name	: ax88180.c
+ * Date		: 2008-07-07
+ * History
+ * 09/06/2006	: New release for AX88180 US2 chip.
+ * 07/07/2008	: Fix up the coding style and using inline functions
+ *		  instead of macros
+ * ========================================================================
+ */
+#include <common.h>
+#include <command.h>
+#include <net.h>
+#include <malloc.h>
+#include "ax88180.h"
+
+/*
+ * ===========================================================================
+ * Local SubProgram Declaration
+ * ===========================================================================
+ */
+static void ax88180_rx_handler (struct eth_device *dev);
+static int ax88180_phy_initial (struct eth_device *dev);
+static void ax88180_meidia_config (struct eth_device *dev);
+static unsigned long get_CicadaPHY_meida_mode (struct eth_device *dev);
+static unsigned long get_MarvellPHY_meida_mode (struct eth_device *dev);
+static unsigned short ax88180_mdio_read (struct eth_device *dev,
+					 unsigned long regaddr);
+static void ax88180_mdio_write (struct eth_device *dev,
+				unsigned long regaddr, unsigned short regdata);
+
+/*
+ * ===========================================================================
+ * Local SubProgram Bodies
+ * ===========================================================================
+ */
+static int ax88180_mdio_check_complete (struct eth_device *dev)
+{
+	int us_cnt = 10000;
+	unsigned short tmpval;
+
+	/* MDIO read/write should not take more than 10 ms */
+	while (--us_cnt) {
+		tmpval = INW (dev, MDIOCTRL);
+		if (((tmpval & READ_PHY) == 0) && ((tmpval & WRITE_PHY) == 0))
+			break;
+	}
+
+	return us_cnt;
+}
+
+static unsigned short
+ax88180_mdio_read (struct eth_device *dev, unsigned long regaddr)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned long tmpval = 0;
+
+	OUTW (dev, (READ_PHY | (regaddr << 8) | priv->PhyAddr), MDIOCTRL);
+
+	if (ax88180_mdio_check_complete (dev))
+		tmpval = INW (dev, MDIODP);
+	else
+		printf ("Failed to read PHY register!\n");
+
+	return (unsigned short)(tmpval & 0xFFFF);
+}
+
+static void
+ax88180_mdio_write (struct eth_device *dev, unsigned long regaddr,
+		    unsigned short regdata)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+
+	OUTW (dev, regdata, MDIODP);
+
+	OUTW (dev, (WRITE_PHY | (regaddr << 8) | priv->PhyAddr), MDIOCTRL);
+
+	if (!ax88180_mdio_check_complete (dev))
+		printf ("Failed to write PHY register!\n");
+}
+
+static int ax88180_phy_reset (struct eth_device *dev)
+{
+	unsigned short delay_cnt = 500;
+
+	ax88180_mdio_write (dev, BMCR, (PHY_RESET | AUTONEG_EN));
+
+	/* Wait for the reset to complete, or time out (500 ms) */
+	while (ax88180_mdio_read (dev, BMCR) & PHY_RESET) {
+		udelay (1000);
+		if (--delay_cnt == 0) {
+			printf ("Failed to reset PHY!\n");
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+static void ax88180_mac_reset (struct eth_device *dev)
+{
+	unsigned long tmpval;
+	unsigned char i;
+
+	struct {
+		unsigned short offset, value;
+	} program_seq[] = {
+		{
+		MISC, MISC_NORMAL}, {
+		RXINDICATOR, DEFAULT_RXINDICATOR}, {
+		TXCMD, DEFAULT_TXCMD}, {
+		TXBS, DEFAULT_TXBS}, {
+		TXDES0, DEFAULT_TXDES0}, {
+		TXDES1, DEFAULT_TXDES1}, {
+		TXDES2, DEFAULT_TXDES2}, {
+		TXDES3, DEFAULT_TXDES3}, {
+		TXCFG, DEFAULT_TXCFG}, {
+		MACCFG2, DEFAULT_MACCFG2}, {
+		MACCFG3, DEFAULT_MACCFG3}, {
+		TXLEN, DEFAULT_TXLEN}, {
+		RXBTHD0, DEFAULT_RXBTHD0}, {
+		RXBTHD1, DEFAULT_RXBTHD1}, {
+		RXFULTHD, DEFAULT_RXFULTHD}, {
+		DOGTHD0, DEFAULT_DOGTHD0}, {
+	DOGTHD1, DEFAULT_DOGTHD1},};
+
+	OUTW (dev, MISC_RESET_MAC, MISC);
+	tmpval = INW (dev, MISC);
+
+	for (i = 0; i < (sizeof (program_seq) / sizeof (program_seq[0])); i++)
+		OUTW (dev, program_seq[i].value, program_seq[i].offset);
+}
+
+static int ax88180_poll_tx_complete (struct eth_device *dev)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned long tmpval, txbs_txdp;
+	int TimeOutCnt = 10000;
+
+	txbs_txdp = 1 << priv->NextTxDesc;
+
+	while (TimeOutCnt--) {
+
+		tmpval = INW (dev, TXBS);
+
+		if ((tmpval & txbs_txdp) == 0)
+			break;
+
+		udelay (100);
+	}
+
+	if (TimeOutCnt)
+		return 0;
+	else
+		return -TimeOutCnt;
+}
+
+static void ax88180_rx_handler (struct eth_device *dev)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned long data_size;
+	unsigned short rxcurt_ptr, rxbound_ptr, next_ptr;
+	int i;
+#if defined (CONFIG_DRIVER_AX88180_16BIT)
+	unsigned short *rxdata = (unsigned short *)NetRxPackets[0];
+#else
+	unsigned long *rxdata = (unsigned long *)NetRxPackets[0];
+#endif
+	unsigned short count;
+
+	rxcurt_ptr = INW (dev, RXCURT);
+	rxbound_ptr = INW (dev, RXBOUND);
+	next_ptr = (rxbound_ptr + 1) & RX_PAGE_NUM_MASK;
+
+	debug ("ax88180: RX original RXBOUND=0x%04x,"
+	       " RXCURT=0x%04x\n", rxbound_ptr, rxcurt_ptr);
+
+	while (next_ptr != rxcurt_ptr) {
+
+		OUTW (dev, RX_START_READ, RXINDICATOR);
+
+		data_size = READ_RXBUF (dev) & 0xFFFF;
+
+		if ((data_size == 0) || (data_size > MAX_RX_SIZE)) {
+
+			OUTW (dev, RX_STOP_READ, RXINDICATOR);
+
+			ax88180_mac_reset (dev);
+			printf ("ax88180: Invalid Rx packet length!"
+				" (len=0x%04lx)\n", data_size);
+
+			debug ("ax88180: RX RXBOUND=0x%04x,"
+			       "RXCURT=0x%04x\n", rxbound_ptr, rxcurt_ptr);
+			return;
+		}
+
+		rxbound_ptr += (((data_size + 0xF) & 0xFFF0) >> 4) + 1;
+		rxbound_ptr &= RX_PAGE_NUM_MASK;
+
+		/* Comput access times */
+		count = (data_size + priv->PadSize) >> priv->BusWidth;
+
+		for (i = 0; i < count; i++) {
+			*(rxdata + i) = READ_RXBUF (dev);
+		}
+
+		OUTW (dev, RX_STOP_READ, RXINDICATOR);
+
+		/* Pass the packet up to the protocol layers. */
+		NetReceive (NetRxPackets[0], data_size);
+
+		OUTW (dev, rxbound_ptr, RXBOUND);
+
+		rxcurt_ptr = INW (dev, RXCURT);
+		rxbound_ptr = INW (dev, RXBOUND);
+		next_ptr = (rxbound_ptr + 1) & RX_PAGE_NUM_MASK;
+
+		debug ("ax88180: RX updated RXBOUND=0x%04x,"
+		       "RXCURT=0x%04x\n", rxbound_ptr, rxcurt_ptr);
+	}
+
+	return;
+}
+
+static int ax88180_phy_initial (struct eth_device *dev)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned long tmp_regval;
+
+	/* Check avaliable PHY chipset  */
+	priv->PhyAddr = MARVELL_88E1111_PHYADDR;
+	priv->PhyID0 = ax88180_mdio_read (dev, PHYIDR0);
+
+	if (priv->PhyID0 == MARVELL_88E1111_PHYIDR0) {
+
+		debug ("ax88180: Found Marvell 88E1111 PHY."
+		       " (PHY Addr=0x%x)\n", priv->PhyAddr);
+
+		tmp_regval = ax88180_mdio_read (dev, M88_EXT_SSR);
+		if ((tmp_regval & HWCFG_MODE_MASK) == RGMII_COPPER_MODE) {
+
+			ax88180_mdio_write (dev, M88_EXT_SCR, DEFAULT_EXT_SCR);
+			if (ax88180_phy_reset (dev) < 0)
+				return 0;
+			ax88180_mdio_write (dev, M88_IER, LINK_CHANGE_INT);
+		}
+	} else {
+
+		priv->PhyAddr = CICADA_CIS8201_PHYADDR;
+		priv->PhyID0 = ax88180_mdio_read (dev, PHYIDR0);
+
+		if (priv->PhyID0 == CICADA_CIS8201_PHYIDR0) {
+
+			debug ("ax88180: Found CICADA CIS8201 PHY"
+			       " chipset. (PHY Addr=0x%x)\n", priv->PhyAddr);
+			ax88180_mdio_write (dev, CIS_IMR,
+					    (CIS_INT_ENABLE | LINK_CHANGE_INT));
+
+			/* Set CIS_SMI_PRIORITY bit before force the media mode */
+			tmp_regval =
+			    ax88180_mdio_read (dev, CIS_AUX_CTRL_STATUS);
+			tmp_regval &= ~CIS_SMI_PRIORITY;
+			ax88180_mdio_write (dev, CIS_AUX_CTRL_STATUS,
+					    tmp_regval);
+		} else {
+			printf ("ax88180: Unknown PHY chipset!!\n");
+			return 0;
+		}
+	}
+
+	return 1;
+}
+
+static void ax88180_meidia_config (struct eth_device *dev)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned long bmcr_val, bmsr_val;
+	unsigned long rxcfg_val, maccfg0_val, maccfg1_val;
+	unsigned long RealMediaMode;
+	int i;
+
+	/* Waiting 2 seconds for PHY link stable */
+	for (i = 0; i < 20000; i++) {
+		bmsr_val = ax88180_mdio_read (dev, BMSR);
+		if (bmsr_val & LINKOK) {
+			break;
+		}
+		udelay (100);
+	}
+
+	bmsr_val = ax88180_mdio_read (dev, BMSR);
+	debug ("ax88180: BMSR=0x%04x\n", (unsigned int)bmsr_val);
+
+	if (bmsr_val & LINKOK) {
+		bmcr_val = ax88180_mdio_read (dev, BMCR);
+
+		if (bmcr_val & AUTONEG_EN) {
+
+			/*
+			 * Waiting for Auto-negotiation completion, this may
+			 * take up to 5 seconds.
+			 */
+			debug ("ax88180: Auto-negotiation is "
+			       "enabled. Waiting for NWay completion..\n");
+			for (i = 0; i < 50000; i++) {
+				bmsr_val = ax88180_mdio_read (dev, BMSR);
+				if (bmsr_val & AUTONEG_COMPLETE) {
+					break;
+				}
+				udelay (100);
+			}
+		} else
+			debug ("ax88180: Auto-negotiation is disabled.\n");
+
+		debug ("ax88180: BMCR=0x%04x, BMSR=0x%04x\n",
+		       (unsigned int)bmcr_val, (unsigned int)bmsr_val);
+
+		/* Get real media mode here */
+		if (priv->PhyID0 == MARVELL_88E1111_PHYIDR0) {
+			RealMediaMode = get_MarvellPHY_meida_mode (dev);
+		} else if (priv->PhyID0 == CICADA_CIS8201_PHYIDR0) {
+			RealMediaMode = get_CicadaPHY_meida_mode (dev);
+		} else {
+			RealMediaMode = MEDIA_1000FULL;
+		}
+
+		priv->LinkState = INS_LINK_UP;
+
+		switch (RealMediaMode) {
+		case MEDIA_1000FULL:
+			debug ("ax88180: 1000Mbps Full-duplex mode.\n");
+			rxcfg_val = RXFLOW_ENABLE | DEFAULT_RXCFG;
+			maccfg0_val = TXFLOW_ENABLE | DEFAULT_MACCFG0;
+			maccfg1_val = GIGA_MODE_EN | RXFLOW_EN |
+			    FULLDUPLEX | DEFAULT_MACCFG1;
+			break;
+
+		case MEDIA_1000HALF:
+			debug ("ax88180: 1000Mbps Half-duplex mode.\n");
+			rxcfg_val = DEFAULT_RXCFG;
+			maccfg0_val = DEFAULT_MACCFG0;
+			maccfg1_val = GIGA_MODE_EN | DEFAULT_MACCFG1;
+			break;
+
+		case MEDIA_100FULL:
+			debug ("ax88180: 100Mbps Full-duplex mode.\n");
+			rxcfg_val = RXFLOW_ENABLE | DEFAULT_RXCFG;
+			maccfg0_val = SPEED100 | TXFLOW_ENABLE
+			    | DEFAULT_MACCFG0;
+			maccfg1_val = RXFLOW_EN | FULLDUPLEX | DEFAULT_MACCFG1;
+			break;
+
+		case MEDIA_100HALF:
+			debug ("ax88180: 100Mbps Half-duplex mode.\n");
+			rxcfg_val = DEFAULT_RXCFG;
+			maccfg0_val = SPEED100 | DEFAULT_MACCFG0;
+			maccfg1_val = DEFAULT_MACCFG1;
+			break;
+
+		case MEDIA_10FULL:
+			debug ("ax88180: 10Mbps Full-duplex mode.\n");
+			rxcfg_val = RXFLOW_ENABLE | DEFAULT_RXCFG;
+			maccfg0_val = TXFLOW_ENABLE | DEFAULT_MACCFG0;
+			maccfg1_val = RXFLOW_EN | FULLDUPLEX | DEFAULT_MACCFG1;
+			break;
+
+		case MEDIA_10HALF:
+			debug ("ax88180: 10Mbps Half-duplex mode.\n");
+			rxcfg_val = DEFAULT_RXCFG;
+			maccfg0_val = DEFAULT_MACCFG0;
+			maccfg1_val = DEFAULT_MACCFG1;
+			break;
+		default:
+			debug ("ax88180: Unknow media mode.\n");
+			rxcfg_val = DEFAULT_RXCFG;
+			maccfg0_val = DEFAULT_MACCFG0;
+			maccfg1_val = DEFAULT_MACCFG1;
+
+			priv->LinkState = INS_LINK_DOWN;
+			break;
+		}
+
+	} else {
+		rxcfg_val = DEFAULT_RXCFG;
+		maccfg0_val = DEFAULT_MACCFG0;
+		maccfg1_val = DEFAULT_MACCFG1;
+
+		priv->LinkState = INS_LINK_DOWN;
+	}
+
+	OUTW (dev, rxcfg_val, RXCFG);
+	OUTW (dev, maccfg0_val, MACCFG0);
+	OUTW (dev, maccfg1_val, MACCFG1);
+
+	return;
+}
+
+static unsigned long get_MarvellPHY_meida_mode (struct eth_device *dev)
+{
+	unsigned long m88_ssr;
+	unsigned long MediaMode;
+
+	m88_ssr = ax88180_mdio_read (dev, M88_SSR);
+	switch (m88_ssr & SSR_MEDIA_MASK) {
+	case SSR_1000FULL:
+		MediaMode = MEDIA_1000FULL;
+		break;
+	case SSR_1000HALF:
+		MediaMode = MEDIA_1000HALF;
+		break;
+	case SSR_100FULL:
+		MediaMode = MEDIA_100FULL;
+		break;
+	case SSR_100HALF:
+		MediaMode = MEDIA_100HALF;
+		break;
+	case SSR_10FULL:
+		MediaMode = MEDIA_10FULL;
+		break;
+	case SSR_10HALF:
+		MediaMode = MEDIA_10HALF;
+		break;
+	default:
+		MediaMode = MEDIA_UNKNOWN;
+		break;
+	}
+
+	return MediaMode;
+}
+
+static unsigned long get_CicadaPHY_meida_mode (struct eth_device *dev)
+{
+	unsigned long tmp_regval;
+	unsigned long MediaMode;
+
+	tmp_regval = ax88180_mdio_read (dev, CIS_AUX_CTRL_STATUS);
+	switch (tmp_regval & CIS_MEDIA_MASK) {
+	case CIS_1000FULL:
+		MediaMode = MEDIA_1000FULL;
+		break;
+	case CIS_1000HALF:
+		MediaMode = MEDIA_1000HALF;
+		break;
+	case CIS_100FULL:
+		MediaMode = MEDIA_100FULL;
+		break;
+	case CIS_100HALF:
+		MediaMode = MEDIA_100HALF;
+		break;
+	case CIS_10FULL:
+		MediaMode = MEDIA_10FULL;
+		break;
+	case CIS_10HALF:
+		MediaMode = MEDIA_10HALF;
+		break;
+	default:
+		MediaMode = MEDIA_UNKNOWN;
+		break;
+	}
+
+	return MediaMode;
+}
+
+static void ax88180_halt (struct eth_device *dev)
+{
+	/* Disable AX88180 TX/RX functions */
+	OUTW (dev, WAKEMOD, CMD);
+}
+
+static int ax88180_init (struct eth_device *dev, bd_t * bd)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned short tmp_regval;
+
+	ax88180_mac_reset (dev);
+
+	/* Disable interrupt */
+	OUTW (dev, CLEAR_IMR, IMR);
+
+	/* Disable AX88180 TX/RX functions */
+	OUTW (dev, WAKEMOD, CMD);
+
+	/* Fill the MAC address */
+	tmp_regval =
+	    dev->enetaddr[0] | (((unsigned short)dev->enetaddr[1]) << 8);
+	OUTW (dev, tmp_regval, MACID0);
+
+	tmp_regval =
+	    dev->enetaddr[2] | (((unsigned short)dev->enetaddr[3]) << 8);
+	OUTW (dev, tmp_regval, MACID1);
+
+	tmp_regval =
+	    dev->enetaddr[4] | (((unsigned short)dev->enetaddr[5]) << 8);
+	OUTW (dev, tmp_regval, MACID2);
+
+	ax88180_meidia_config (dev);
+
+	OUTW (dev, DEFAULT_RXFILTER, RXFILTER);
+
+	/* Initial variables here */
+	priv->FirstTxDesc = TXDP0;
+	priv->NextTxDesc = TXDP0;
+
+	/* Check if there is any invalid interrupt status and clear it. */
+	OUTW (dev, INW (dev, ISR), ISR);
+
+	/* Start AX88180 TX/RX functions */
+	OUTW (dev, (RXEN | TXEN | WAKEMOD), CMD);
+
+	return 0;
+}
+
+/* Get a data block via Ethernet */
+static int ax88180_recv (struct eth_device *dev)
+{
+	unsigned short ISR_Status;
+	unsigned short tmp_regval;
+
+	/* Read and check interrupt status here. */
+	ISR_Status = INW (dev, ISR);
+
+	while (ISR_Status) {
+		/* Clear the interrupt status */
+		OUTW (dev, ISR_Status, ISR);
+
+		debug ("\nax88180: The interrupt status = 0x%04x\n",
+		       ISR_Status);
+
+		if (ISR_Status & ISR_PHY) {
+			/* Read ISR register once to clear PHY interrupt bit */
+			tmp_regval = ax88180_mdio_read (dev, M88_ISR);
+			ax88180_meidia_config (dev);
+		}
+
+		if ((ISR_Status & ISR_RX) || (ISR_Status & ISR_RXBUFFOVR)) {
+			ax88180_rx_handler (dev);
+		}
+
+		/* Read and check interrupt status again */
+		ISR_Status = INW (dev, ISR);
+	}
+
+	return 0;
+}
+
+/* Send a data block via Ethernet. */
+static int
+ax88180_send (struct eth_device *dev, volatile void *packet, int length)
+{
+	struct ax88180_private *priv = (struct ax88180_private *)dev->priv;
+	unsigned short TXDES_addr;
+	unsigned short txcmd_txdp, txbs_txdp;
+	unsigned short tmp_data;
+	int i;
+#if defined (CONFIG_DRIVER_AX88180_16BIT)
+	volatile unsigned short *txdata = (volatile unsigned short *)packet;
+#else
+	volatile unsigned long *txdata = (volatile unsigned long *)packet;
+#endif
+	unsigned short count;
+
+	if (priv->LinkState != INS_LINK_UP) {
+		return 0;
+	}
+
+	priv->FirstTxDesc = priv->NextTxDesc;
+	txbs_txdp = 1 << priv->FirstTxDesc;
+
+	debug ("ax88180: TXDP%d is available\n", priv->FirstTxDesc);
+
+	txcmd_txdp = priv->FirstTxDesc << 13;
+	TXDES_addr = TXDES0 + (priv->FirstTxDesc << 2);
+
+	OUTW (dev, (txcmd_txdp | length | TX_START_WRITE), TXCMD);
+
+	/* Comput access times */
+	count = (length + priv->PadSize) >> priv->BusWidth;
+
+	for (i = 0; i < count; i++) {
+		WRITE_TXBUF (dev, *(txdata + i));
+	}
+
+	OUTW (dev, txcmd_txdp | length, TXCMD);
+	OUTW (dev, txbs_txdp, TXBS);
+	OUTW (dev, (TXDPx_ENABLE | length), TXDES_addr);
+
+	priv->NextTxDesc = (priv->NextTxDesc + 1) & TXDP_MASK;
+
+	/*
+	 * Check the available transmit descriptor, if we had exhausted all
+	 * transmit descriptor ,then we have to wait for at least one free
+	 * descriptor
+	 */
+	txbs_txdp = 1 << priv->NextTxDesc;
+	tmp_data = INW (dev, TXBS);
+
+	if (tmp_data & txbs_txdp) {
+		if (ax88180_poll_tx_complete (dev) < 0) {
+			ax88180_mac_reset (dev);
+			priv->FirstTxDesc = TXDP0;
+			priv->NextTxDesc = TXDP0;
+			printf ("ax88180: Transmit time out occurred!\n");
+		}
+	}
+
+	return 0;
+}
+
+static void ax88180_read_mac_addr (struct eth_device *dev)
+{
+	unsigned short macid0_val, macid1_val, macid2_val;
+	unsigned short tmp_regval;
+	unsigned short i;
+
+	/* Reload MAC address from EEPROM */
+	OUTW (dev, RELOAD_EEPROM, PROMCTRL);
+
+	/* Waiting for reload eeprom completion */
+	for (i = 0; i < 500; i++) {
+		tmp_regval = INW (dev, PROMCTRL);
+		if ((tmp_regval & RELOAD_EEPROM) == 0)
+			break;
+		udelay (1000);
+	}
+
+	/* Get MAC addresses */
+	macid0_val = INW (dev, MACID0);
+	macid1_val = INW (dev, MACID1);
+	macid2_val = INW (dev, MACID2);
+
+	if (((macid0_val | macid1_val | macid2_val) != 0) &&
+	    ((macid0_val & 0x01) == 0)) {
+		dev->enetaddr[0] = (unsigned char)macid0_val;
+		dev->enetaddr[1] = (unsigned char)(macid0_val >> 8);
+		dev->enetaddr[2] = (unsigned char)macid1_val;
+		dev->enetaddr[3] = (unsigned char)(macid1_val >> 8);
+		dev->enetaddr[4] = (unsigned char)macid2_val;
+		dev->enetaddr[5] = (unsigned char)(macid2_val >> 8);
+	}
+}
+
+/*
+===========================================================================
+<<<<<<			Exported SubProgram Bodies		>>>>>>
+===========================================================================
+*/
+int ax88180_initialize (bd_t * bis)
+{
+	struct eth_device *dev;
+	struct ax88180_private *priv;
+
+	dev = (struct eth_device *)malloc (sizeof *dev);
+
+	if (NULL == dev)
+		return 0;
+
+	memset (dev, 0, sizeof *dev);
+
+	priv = (struct ax88180_private *)malloc (sizeof (*priv));
+
+	if (NULL == priv)
+		return 0;
+
+	memset (priv, 0, sizeof *priv);
+
+	sprintf (dev->name, "ax88180");
+	dev->iobase = AX88180_BASE;
+	dev->priv = priv;
+	dev->init = ax88180_init;
+	dev->halt = ax88180_halt;
+	dev->send = ax88180_send;
+	dev->recv = ax88180_recv;
+
+	priv->BusWidth = BUS_WIDTH_32;
+	priv->PadSize = 3;
+#if defined (CONFIG_DRIVER_AX88180_16BIT)
+	OUTW (dev, (START_BASE >> 8), BASE);
+	OUTW (dev, DECODE_EN, DECODE);
+
+	priv->BusWidth = BUS_WIDTH_16;
+	priv->PadSize = 1;
+#endif
+
+	ax88180_mac_reset (dev);
+
+	/* Disable interrupt */
+	OUTW (dev, CLEAR_IMR, IMR);
+
+	/* Disable AX88180 TX/RX functions */
+	OUTW (dev, WAKEMOD, CMD);
+
+	ax88180_read_mac_addr (dev);
+
+	eth_register (dev);
+
+	return ax88180_phy_initial (dev);
+
+}