net: axi_ethernet: Add driver to u-boot

Add axi_ethernet driver for little-endian Microblaze.

RX/TX BDs and rxframe buffer are shared among all axi_ethernet MACs.
Only one MAC can work in one time.

Signed-off-by: Michal Simek <monstr@monstr.eu>
Acked-by: Mike Frysinger <vapier@gentoo.org>

3 files changed, 667 insertions, 0 deletions

diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 3f845d6237..3f4f9749dd 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -78,6 +78,7 @@ COBJS-$(CONFIG_FMAN_ENET) += fsl_mdio.o
 COBJS-$(CONFIG_TSI108_ETH) += tsi108_eth.o
 COBJS-$(CONFIG_ULI526X) += uli526x.o
 COBJS-$(CONFIG_VSC7385_ENET) += vsc7385.o
+COBJS-$(CONFIG_XILINX_AXIEMAC) += xilinx_axi_emac.o
 COBJS-$(CONFIG_XILINX_EMACLITE) += xilinx_emaclite.o
 
 COBJS	:= $(sort $(COBJS-y))
diff --git a/drivers/net/xilinx_axi_emac.c b/drivers/net/xilinx_axi_emac.c
new file mode 100644
index 0000000000..82e254b529
--- /dev/null
+++ b/drivers/net/xilinx_axi_emac.c
@@ -0,0 +1,664 @@
+/*
+ * Copyright (C) 2011 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2011 PetaLogix
+ * Copyright (C) 2010 Xilinx, Inc. All rights reserved.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that 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
+ */
+
+#include <config.h>
+#include <common.h>
+#include <net.h>
+#include <malloc.h>
+#include <asm/io.h>
+#include <phy.h>
+#include <miiphy.h>
+
+#if !defined(CONFIG_PHYLIB)
+# error AXI_ETHERNET requires PHYLIB
+#endif
+
+/* Link setup */
+#define XAE_EMMC_LINKSPEED_MASK	0xC0000000 /* Link speed */
+#define XAE_EMMC_LINKSPD_10	0x00000000 /* Link Speed mask for 10 Mbit */
+#define XAE_EMMC_LINKSPD_100	0x40000000 /* Link Speed mask for 100 Mbit */
+#define XAE_EMMC_LINKSPD_1000	0x80000000 /* Link Speed mask for 1000 Mbit */
+
+/* Interrupt Status/Enable/Mask Registers bit definitions */
+#define XAE_INT_RXRJECT_MASK	0x00000008 /* Rx frame rejected */
+#define XAE_INT_MGTRDY_MASK	0x00000080 /* MGT clock Lock */
+
+/* Receive Configuration Word 1 (RCW1) Register bit definitions */
+#define XAE_RCW1_RX_MASK	0x10000000 /* Receiver enable */
+
+/* Transmitter Configuration (TC) Register bit definitions */
+#define XAE_TC_TX_MASK		0x10000000 /* Transmitter enable */
+
+#define XAE_UAW1_UNICASTADDR_MASK	0x0000FFFF
+
+/* MDIO Management Configuration (MC) Register bit definitions */
+#define XAE_MDIO_MC_MDIOEN_MASK		0x00000040 /* MII management enable*/
+
+/* MDIO Management Control Register (MCR) Register bit definitions */
+#define XAE_MDIO_MCR_PHYAD_MASK		0x1F000000 /* Phy Address Mask */
+#define XAE_MDIO_MCR_PHYAD_SHIFT	24	   /* Phy Address Shift */
+#define XAE_MDIO_MCR_REGAD_MASK		0x001F0000 /* Reg Address Mask */
+#define XAE_MDIO_MCR_REGAD_SHIFT	16	   /* Reg Address Shift */
+#define XAE_MDIO_MCR_OP_READ_MASK	0x00008000 /* Op Code Read Mask */
+#define XAE_MDIO_MCR_OP_WRITE_MASK	0x00004000 /* Op Code Write Mask */
+#define XAE_MDIO_MCR_INITIATE_MASK	0x00000800 /* Ready Mask */
+#define XAE_MDIO_MCR_READY_MASK		0x00000080 /* Ready Mask */
+
+#define XAE_MDIO_DIV_DFT	29	/* Default MDIO clock divisor */
+
+/* DMA macros */
+/* Bitmasks of XAXIDMA_CR_OFFSET register */
+#define XAXIDMA_CR_RUNSTOP_MASK	0x00000001 /* Start/stop DMA channel */
+#define XAXIDMA_CR_RESET_MASK	0x00000004 /* Reset DMA engine */
+
+/* Bitmasks of XAXIDMA_SR_OFFSET register */
+#define XAXIDMA_HALTED_MASK	0x00000001  /* DMA channel halted */
+
+/* Bitmask for interrupts */
+#define XAXIDMA_IRQ_IOC_MASK	0x00001000 /* Completion intr */
+#define XAXIDMA_IRQ_DELAY_MASK	0x00002000 /* Delay interrupt */
+#define XAXIDMA_IRQ_ALL_MASK	0x00007000 /* All interrupts */
+
+/* Bitmasks of XAXIDMA_BD_CTRL_OFFSET register */
+#define XAXIDMA_BD_CTRL_TXSOF_MASK	0x08000000 /* First tx packet */
+#define XAXIDMA_BD_CTRL_TXEOF_MASK	0x04000000 /* Last tx packet */
+
+#define DMAALIGN	128
+
+static u8 rxframe[PKTSIZE_ALIGN] __attribute((aligned(DMAALIGN)));
+
+/* Reflect dma offsets */
+struct axidma_reg {
+	u32 control; /* DMACR */
+	u32 status; /* DMASR */
+	u32 current; /* CURDESC */
+	u32 reserved;
+	u32 tail; /* TAILDESC */
+};
+
+/* Private driver structures */
+struct axidma_priv {
+	struct axidma_reg *dmatx;
+	struct axidma_reg *dmarx;
+	int phyaddr;
+
+	struct phy_device *phydev;
+	struct mii_dev *bus;
+};
+
+/* BD descriptors */
+struct axidma_bd {
+	u32 next;	/* Next descriptor pointer */
+	u32 reserved1;
+	u32 phys;	/* Buffer address */
+	u32 reserved2;
+	u32 reserved3;
+	u32 reserved4;
+	u32 cntrl;	/* Control */
+	u32 status;	/* Status */
+	u32 app0;
+	u32 app1;	/* TX start << 16 | insert */
+	u32 app2;	/* TX csum seed */
+	u32 app3;
+	u32 app4;
+	u32 sw_id_offset;
+	u32 reserved5;
+	u32 reserved6;
+};
+
+/* Static BDs - driver uses only one BD */
+static struct axidma_bd tx_bd __attribute((aligned(DMAALIGN)));
+static struct axidma_bd rx_bd __attribute((aligned(DMAALIGN)));
+
+struct axi_regs {
+	u32 reserved[3];
+	u32 is; /* 0xC: Interrupt status */
+	u32 reserved2;
+	u32 ie; /* 0x14: Interrupt enable */
+	u32 reserved3[251];
+	u32 rcw1; /* 0x404: Rx Configuration Word 1 */
+	u32 tc; /* 0x408: Tx Configuration */
+	u32 reserved4;
+	u32 emmc; /* 0x410: EMAC mode configuration */
+	u32 reserved5[59];
+	u32 mdio_mc; /* 0x500: MII Management Config */
+	u32 mdio_mcr; /* 0x504: MII Management Control */
+	u32 mdio_mwd; /* 0x508: MII Management Write Data */
+	u32 mdio_mrd; /* 0x50C: MII Management Read Data */
+	u32 reserved6[124];
+	u32 uaw0; /* 0x700: Unicast address word 0 */
+	u32 uaw1; /* 0x704: Unicast address word 1 */
+};
+
+/* Use MII register 1 (MII status register) to detect PHY */
+#define PHY_DETECT_REG  1
+
+/*
+ * Mask used to verify certain PHY features (or register contents)
+ * in the register above:
+ *  0x1000: 10Mbps full duplex support
+ *  0x0800: 10Mbps half duplex support
+ *  0x0008: Auto-negotiation support
+ */
+#define PHY_DETECT_MASK 0x1808
+
+static inline int mdio_wait(struct eth_device *dev)
+{
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+	u32 timeout = 200;
+
+	/* Wait till MDIO interface is ready to accept a new transaction. */
+	while (timeout && (!(in_be32(&regs->mdio_mcr)
+						& XAE_MDIO_MCR_READY_MASK))) {
+		timeout--;
+		udelay(1);
+	}
+	if (!timeout) {
+		printf("%s: Timeout\n", __func__);
+		return 1;
+	}
+	return 0;
+}
+
+static u32 phyread(struct eth_device *dev, u32 phyaddress, u32 registernum,
+								u16 *val)
+{
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+	u32 mdioctrlreg = 0;
+
+	if (mdio_wait(dev))
+		return 1;
+
+	mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) &
+			XAE_MDIO_MCR_PHYAD_MASK) |
+			((registernum << XAE_MDIO_MCR_REGAD_SHIFT)
+			& XAE_MDIO_MCR_REGAD_MASK) |
+			XAE_MDIO_MCR_INITIATE_MASK |
+			XAE_MDIO_MCR_OP_READ_MASK;
+
+	out_be32(&regs->mdio_mcr, mdioctrlreg);
+
+	if (mdio_wait(dev))
+		return 1;
+
+	/* Read data */
+	*val = in_be32(&regs->mdio_mrd);
+	return 0;
+}
+
+static u32 phywrite(struct eth_device *dev, u32 phyaddress, u32 registernum,
+								u32 data)
+{
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+	u32 mdioctrlreg = 0;
+
+	if (mdio_wait(dev))
+		return 1;
+
+	mdioctrlreg = ((phyaddress << XAE_MDIO_MCR_PHYAD_SHIFT) &
+			XAE_MDIO_MCR_PHYAD_MASK) |
+			((registernum << XAE_MDIO_MCR_REGAD_SHIFT)
+			& XAE_MDIO_MCR_REGAD_MASK) |
+			XAE_MDIO_MCR_INITIATE_MASK |
+			XAE_MDIO_MCR_OP_WRITE_MASK;
+
+	/* Write data */
+	out_be32(&regs->mdio_mwd, data);
+
+	out_be32(&regs->mdio_mcr, mdioctrlreg);
+
+	if (mdio_wait(dev))
+		return 1;
+
+	return 0;
+}
+
+/* Setting axi emac and phy to proper setting */
+static int setup_phy(struct eth_device *dev)
+{
+	u16 phyreg;
+	u32 i, speed, emmc_reg, ret;
+	struct axidma_priv *priv = dev->priv;
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+	struct phy_device *phydev;
+
+	u32 supported = SUPPORTED_10baseT_Half |
+			SUPPORTED_10baseT_Full |
+			SUPPORTED_100baseT_Half |
+			SUPPORTED_100baseT_Full |
+			SUPPORTED_1000baseT_Half |
+			SUPPORTED_1000baseT_Full;
+
+	if (priv->phyaddr == -1) {
+		/* Detect the PHY address */
+		for (i = 31; i >= 0; i--) {
+			ret = phyread(dev, i, PHY_DETECT_REG, &phyreg);
+			if (!ret && (phyreg != 0xFFFF) &&
+			((phyreg & PHY_DETECT_MASK) == PHY_DETECT_MASK)) {
+				/* Found a valid PHY address */
+				priv->phyaddr = i;
+				debug("axiemac: Found valid phy address, %x\n",
+									phyreg);
+				break;
+			}
+		}
+	}
+
+	/* Interface - look at tsec */
+	phydev = phy_connect(priv->bus, priv->phyaddr, dev, 0);
+
+	phydev->supported &= supported;
+	phydev->advertising = phydev->supported;
+	priv->phydev = phydev;
+	phy_config(phydev);
+	phy_startup(phydev);
+
+	switch (phydev->speed) {
+	case 1000:
+		speed = XAE_EMMC_LINKSPD_1000;
+		break;
+	case 100:
+		speed = XAE_EMMC_LINKSPD_100;
+		break;
+	case 10:
+		speed = XAE_EMMC_LINKSPD_10;
+		break;
+	default:
+		return 0;
+	}
+
+	/* Setup the emac for the phy speed */
+	emmc_reg = in_be32(&regs->emmc);
+	emmc_reg &= ~XAE_EMMC_LINKSPEED_MASK;
+	emmc_reg |= speed;
+
+	/* Write new speed setting out to Axi Ethernet */
+	out_be32(&regs->emmc, emmc_reg);
+
+	/*
+	* Setting the operating speed of the MAC needs a delay. There
+	* doesn't seem to be register to poll, so please consider this
+	* during your application design.
+	*/
+	udelay(1);
+
+	return 1;
+}
+
+/* STOP DMA transfers */
+static void axiemac_halt(struct eth_device *dev)
+{
+	struct axidma_priv *priv = dev->priv;
+	u32 temp;
+
+	/* Stop the hardware */
+	temp = in_be32(&priv->dmatx->control);
+	temp &= ~XAXIDMA_CR_RUNSTOP_MASK;
+	out_be32(&priv->dmatx->control, temp);
+
+	temp = in_be32(&priv->dmarx->control);
+	temp &= ~XAXIDMA_CR_RUNSTOP_MASK;
+	out_be32(&priv->dmarx->control, temp);
+
+	debug("axiemac: Halted\n");
+}
+
+static int axi_ethernet_init(struct eth_device *dev)
+{
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+	u32 timeout = 200;
+
+	/*
+	 * Check the status of the MgtRdy bit in the interrupt status
+	 * registers. This must be done to allow the MGT clock to become stable
+	 * for the Sgmii and 1000BaseX PHY interfaces. No other register reads
+	 * will be valid until this bit is valid.
+	 * The bit is always a 1 for all other PHY interfaces.
+	 */
+	while (timeout && (!(in_be32(&regs->is) & XAE_INT_MGTRDY_MASK))) {
+		timeout--;
+		udelay(1);
+	}
+	if (!timeout) {
+		printf("%s: Timeout\n", __func__);
+		return 1;
+	}
+
+	/* Stop the device and reset HW */
+	/* Disable interrupts */
+	out_be32(&regs->ie, 0);
+
+	/* Disable the receiver */
+	out_be32(&regs->rcw1, in_be32(&regs->rcw1) & ~XAE_RCW1_RX_MASK);
+
+	/*
+	 * Stopping the receiver in mid-packet causes a dropped packet
+	 * indication from HW. Clear it.
+	 */
+	/* Set the interrupt status register to clear the interrupt */
+	out_be32(&regs->is, XAE_INT_RXRJECT_MASK);
+
+	/* Setup HW */
+	/* Set default MDIO divisor */
+	out_be32(&regs->mdio_mc, XAE_MDIO_DIV_DFT | XAE_MDIO_MC_MDIOEN_MASK);
+
+	debug("axiemac: InitHw done\n");
+	return 0;
+}
+
+static int axiemac_setup_mac(struct eth_device *dev)
+{
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+
+	/* Set the MAC address */
+	int val = ((dev->enetaddr[3] << 24) | (dev->enetaddr[2] << 16) |
+		(dev->enetaddr[1] << 8) | (dev->enetaddr[0]));
+	out_be32(&regs->uaw0, val);
+
+	val = (dev->enetaddr[5] << 8) | dev->enetaddr[4] ;
+	val |= in_be32(&regs->uaw1) & ~XAE_UAW1_UNICASTADDR_MASK;
+	out_be32(&regs->uaw1, val);
+	return 0;
+}
+
+/* Reset DMA engine */
+static void axi_dma_init(struct eth_device *dev)
+{
+	struct axidma_priv *priv = dev->priv;
+	u32 timeout = 500;
+
+	/* Reset the engine so the hardware starts from a known state */
+	out_be32(&priv->dmatx->control, XAXIDMA_CR_RESET_MASK);
+	out_be32(&priv->dmarx->control, XAXIDMA_CR_RESET_MASK);
+
+	/* At the initialization time, hardware should finish reset quickly */
+	while (timeout--) {
+		/* Check transmit/receive channel */
+		/* Reset is done when the reset bit is low */
+		if (!(in_be32(&priv->dmatx->control) |
+				in_be32(&priv->dmarx->control))
+						& XAXIDMA_CR_RESET_MASK) {
+			break;
+		}
+	}
+	if (!timeout)
+		printf("%s: Timeout\n", __func__);
+}
+
+static int axiemac_init(struct eth_device *dev, bd_t * bis)
+{
+	struct axidma_priv *priv = dev->priv;
+	struct axi_regs *regs = (struct axi_regs *)dev->iobase;
+	u32 temp;
+
+	debug("axiemac: Init started\n");
+	/*
+	 * Initialize AXIDMA engine. AXIDMA engine must be initialized before
+	 * AxiEthernet. During AXIDMA engine initialization, AXIDMA hardware is
+	 * reset, and since AXIDMA reset line is connected to AxiEthernet, this
+	 * would ensure a reset of AxiEthernet.
+	 */
+	axi_dma_init(dev);
+
+	/* Initialize AxiEthernet hardware. */
+	if (axi_ethernet_init(dev))
+		return -1;
+
+	/* Disable all RX interrupts before RxBD space setup */
+	temp = in_be32(&priv->dmarx->control);
+	temp &= ~XAXIDMA_IRQ_ALL_MASK;
+	out_be32(&priv->dmarx->control, temp);
+
+	/* Start DMA RX channel. Now it's ready to receive data.*/
+	out_be32(&priv->dmarx->current, (u32)&rx_bd);
+
+	/* Setup the BD. */
+	memset(&rx_bd, 0, sizeof(rx_bd));
+	rx_bd.next = (u32)&rx_bd;
+	rx_bd.phys = (u32)&rxframe;
+	rx_bd.cntrl = sizeof(rxframe);
+	/* Flush the last BD so DMA core could see the updates */
+	flush_cache((u32)&rx_bd, sizeof(rx_bd));
+
+	/* It is necessary to flush rxframe because if you don't do it
+	 * then cache can contain uninitialized data */
+	flush_cache((u32)&rxframe, sizeof(rxframe));
+
+	/* Start the hardware */
+	temp = in_be32(&priv->dmarx->control);
+	temp |= XAXIDMA_CR_RUNSTOP_MASK;
+	out_be32(&priv->dmarx->control, temp);
+
+	/* Rx BD is ready - start */
+	out_be32(&priv->dmarx->tail, (u32)&rx_bd);
+
+	/* Enable TX */
+	out_be32(&regs->tc, XAE_TC_TX_MASK);
+	/* Enable RX */
+	out_be32(&regs->rcw1, XAE_RCW1_RX_MASK);
+
+	/* PHY setup */
+	if (!setup_phy(dev)) {
+		axiemac_halt(dev);
+		return -1;
+	}
+
+	debug("axiemac: Init complete\n");
+	return 0;
+}
+
+static int axiemac_send(struct eth_device *dev, volatile void *ptr, int len)
+{
+	struct axidma_priv *priv = dev->priv;
+	u32 timeout;
+
+	if (len > PKTSIZE_ALIGN)
+		len = PKTSIZE_ALIGN;
+
+	/* Flush packet to main memory to be trasfered by DMA */
+	flush_cache((u32)ptr, len);
+
+	/* Setup Tx BD */
+	memset(&tx_bd, 0, sizeof(tx_bd));
+	/* At the end of the ring, link the last BD back to the top */
+	tx_bd.next = (u32)&tx_bd;
+	tx_bd.phys = (u32)ptr;
+	/* Save len */
+	tx_bd.cntrl = len | XAXIDMA_BD_CTRL_TXSOF_MASK |
+						XAXIDMA_BD_CTRL_TXEOF_MASK;
+
+	/* Flush the last BD so DMA core could see the updates */
+	flush_cache((u32)&tx_bd, sizeof(tx_bd));
+
+	if (in_be32(&priv->dmatx->status) & XAXIDMA_HALTED_MASK) {
+		u32 temp;
+		out_be32(&priv->dmatx->current, (u32)&tx_bd);
+		/* Start the hardware */
+		temp = in_be32(&priv->dmatx->control);
+		temp |= XAXIDMA_CR_RUNSTOP_MASK;
+		out_be32(&priv->dmatx->control, temp);
+	}
+
+	/* Start transfer */
+	out_be32(&priv->dmatx->tail, (u32)&tx_bd);
+
+	/* Wait for transmission to complete */
+	debug("axiemac: Waiting for tx to be done\n");
+	timeout = 200;
+	while (timeout && (!in_be32(&priv->dmatx->status) &
+			(XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK))) {
+		timeout--;
+		udelay(1);
+	}
+	if (!timeout) {
+		printf("%s: Timeout\n", __func__);
+		return 1;
+	}
+
+	debug("axiemac: Sending complete\n");
+	return 0;
+}
+
+static int isrxready(struct eth_device *dev)
+{
+	u32 status;
+	struct axidma_priv *priv = dev->priv;
+
+	/* Read pending interrupts */
+	status = in_be32(&priv->dmarx->status);
+
+	/* Acknowledge pending interrupts */
+	out_be32(&priv->dmarx->status, status & XAXIDMA_IRQ_ALL_MASK);
+
+	/*
+	 * If Reception done interrupt is asserted, call RX call back function
+	 * to handle the processed BDs and then raise the according flag.
+	 */
+	if ((status & (XAXIDMA_IRQ_DELAY_MASK | XAXIDMA_IRQ_IOC_MASK)))
+		return 1;
+
+	return 0;
+}
+
+static int axiemac_recv(struct eth_device *dev)
+{
+	u32 length;
+	struct axidma_priv *priv = dev->priv;
+	u32 temp;
+
+	/* Wait for an incoming packet */
+	if (!isrxready(dev))
+		return 0;
+
+	debug("axiemac: RX data ready\n");
+
+	/* Disable IRQ for a moment till packet is handled */
+	temp = in_be32(&priv->dmarx->control);
+	temp &= ~XAXIDMA_IRQ_ALL_MASK;
+	out_be32(&priv->dmarx->control, temp);
+
+	length = rx_bd.app4 & 0xFFFF; /* max length mask */
+#ifdef DEBUG
+	print_buffer(&rxframe, &rxframe[0], 1, length, 16);
+#endif
+	/* Pass the received frame up for processing */
+	if (length)
+		NetReceive(rxframe, length);
+
+#ifdef DEBUG
+	/* It is useful to clear buffer to be sure that it is consistent */
+	memset(rxframe, 0, sizeof(rxframe));
+#endif
+	/* Setup RxBD */
+	/* Clear the whole buffer and setup it again - all flags are cleared */
+	memset(&rx_bd, 0, sizeof(rx_bd));
+	rx_bd.next = (u32)&rx_bd;
+	rx_bd.phys = (u32)&rxframe;
+	rx_bd.cntrl = sizeof(rxframe);
+
+	/* Write bd to HW */
+	flush_cache((u32)&rx_bd, sizeof(rx_bd));
+
+	/* It is necessary to flush rxframe because if you don't do it
+	 * then cache will contain previous packet */
+	flush_cache((u32)&rxframe, sizeof(rxframe));
+
+	/* Rx BD is ready - start again */
+	out_be32(&priv->dmarx->tail, (u32)&rx_bd);
+
+	debug("axiemac: RX completed, framelength = %d\n", length);
+
+	return length;
+}
+
+static int axiemac_miiphy_read(const char *devname, uchar addr,
+							uchar reg, ushort *val)
+{
+	struct eth_device *dev = eth_get_dev();
+	u32 ret;
+
+	ret = phyread(dev, addr, reg, val);
+	debug("axiemac: Read MII 0x%x, 0x%x, 0x%x\n", addr, reg, *val);
+	return ret;
+}
+
+static int axiemac_miiphy_write(const char *devname, uchar addr,
+							uchar reg, ushort val)
+{
+	struct eth_device *dev = eth_get_dev();
+
+	debug("axiemac: Write MII 0x%x, 0x%x, 0x%x\n", addr, reg, val);
+	return phywrite(dev, addr, reg, val);
+}
+
+static int axiemac_bus_reset(struct mii_dev *bus)
+{
+	debug("axiemac: Bus reset\n");
+	return 0;
+}
+
+int xilinx_axiemac_initialize(bd_t *bis, unsigned long base_addr,
+							unsigned long dma_addr)
+{
+	struct eth_device *dev;
+	struct axidma_priv *priv;
+
+	dev = calloc(1, sizeof(struct eth_device));
+	if (dev == NULL)
+		return -1;
+
+	dev->priv = calloc(1, sizeof(struct axidma_priv));
+	if (dev->priv == NULL) {
+		free(dev);
+		return -1;
+	}
+	priv = dev->priv;
+
+	sprintf(dev->name, "aximac.%lx", base_addr);
+
+	dev->iobase = base_addr;
+	priv->dmatx = (struct axidma_reg *)dma_addr;
+	/* RX channel offset is 0x30 */
+	priv->dmarx = (struct axidma_reg *)(dma_addr + 0x30);
+	dev->init = axiemac_init;
+	dev->halt = axiemac_halt;
+	dev->send = axiemac_send;
+	dev->recv = axiemac_recv;
+	dev->write_hwaddr = axiemac_setup_mac;
+
+#ifdef CONFIG_PHY_ADDR
+	priv->phyaddr = CONFIG_PHY_ADDR;
+#else
+	priv->phyaddr = -1;
+#endif
+
+	eth_register(dev);
+
+#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) || defined(CONFIG_PHYLIB)
+	miiphy_register(dev->name, axiemac_miiphy_read, axiemac_miiphy_write);
+	priv->bus = miiphy_get_dev_by_name(dev->name);
+	priv->bus->reset = axiemac_bus_reset;
+#endif
+	return 1;
+}
diff --git a/include/netdev.h b/include/netdev.h
index 480453e51d..669f60b7e4 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -95,6 +95,8 @@ int tsi108_eth_initialize(bd_t *bis);
 int uec_standard_init(bd_t *bis);
 int uli526x_initialize(bd_t *bis);
 int armada100_fec_register(unsigned long base_addr);
+int xilinx_axiemac_initialize(bd_t *bis, unsigned long base_addr,
+							unsigned long dma_addr);
 int xilinx_emaclite_initialize (bd_t *bis, int base_addr);
 
 /* Boards with PCI network controllers can call this from their board_eth_init()