fec_mxc: driver for FEC ethernet controller on i.MX27

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

5 files changed, 1058 insertions, 0 deletions

diff --git a/cpu/arm926ejs/mx27/generic.c b/cpu/arm926ejs/mx27/generic.c
index bcf7899..47fa4b4 100644
--- a/cpu/arm926ejs/mx27/generic.c
+++ b/cpu/arm926ejs/mx27/generic.c
@@ -20,6 +20,7 @@
 
 #include <common.h>
 #include <div64.h>
+#include <netdev.h>
 #include <asm/io.h>
 #include <asm/arch/imx-regs.h>
 
@@ -159,6 +160,15 @@ int print_cpuinfo (void)
 }
 #endif
 
+int cpu_eth_init(bd_t *bis)
+{
+#if defined(CONFIG_FEC_MXC)
+	return fecmxc_initialize(bis);
+#else
+	return 0;
+#endif
+}
+
 void imx_gpio_mode(int gpio_mode)
 {
 	struct gpio_regs *regs = (struct gpio_regs *)IMX_GPIO_BASE;
diff --git a/drivers/net/Makefile b/drivers/net/Makefile
index 1ce2936..34b56d8 100644
--- a/drivers/net/Makefile
+++ b/drivers/net/Makefile
@@ -37,6 +37,7 @@ COBJS-$(CONFIG_DNET) += dnet.o
 COBJS-$(CONFIG_E1000) += e1000.o
 COBJS-$(CONFIG_EEPRO100) += eepro100.o
 COBJS-$(CONFIG_ENC28J60) += enc28j60.o
+COBJS-$(CONFIG_FEC_MXC) += fec_mxc.o
 COBJS-$(CONFIG_FSLDMAFEC) += fsl_mcdmafec.o mcfmii.o
 COBJS-$(CONFIG_GRETH) += greth.o
 COBJS-$(CONFIG_INCA_IP_SWITCH) += inca-ip_sw.o
diff --git a/drivers/net/fec_mxc.c b/drivers/net/fec_mxc.c
new file mode 100644
index 0000000..faf008c
--- /dev/null
+++ b/drivers/net/fec_mxc.c
@@ -0,0 +1,742 @@
+/*
+ * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok@emcraft.com>
+ * (C) Copyright 2008,2009 Eric Jarrige <eric.jarrige@armadeus.org>
+ * (C) Copyright 2008 Armadeus Systems nc
+ * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
+ * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert@pengutronix.de>
+ *
+ * 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 <common.h>
+#include <malloc.h>
+#include <net.h>
+#include <miiphy.h>
+#include "fec_mxc.h"
+
+#include <asm/arch/clock.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/io.h>
+#include <asm/errno.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#ifndef CONFIG_MII
+#error "CONFIG_MII has to be defined!"
+#endif
+
+#undef DEBUG
+
+struct nbuf {
+	uint8_t data[1500];	/**< actual data */
+	int length;		/**< actual length */
+	int used;		/**< buffer in use or not */
+	uint8_t head[16];	/**< MAC header(6 + 6 + 2) + 2(aligned) */
+};
+
+struct fec_priv gfec = {
+	.eth       = (struct ethernet_regs *)IMX_FEC_BASE,
+	.xcv_type  = MII100,
+	.rbd_base  = NULL,
+	.rbd_index = 0,
+	.tbd_base  = NULL,
+	.tbd_index = 0,
+	.bd        = NULL,
+};
+
+/*
+ * MII-interface related functions
+ */
+static int fec_miiphy_read(char *dev, uint8_t phyAddr, uint8_t regAddr,
+		uint16_t *retVal)
+{
+	struct eth_device *edev = eth_get_dev_by_name(dev);
+	struct fec_priv *fec = (struct fec_priv *)edev->priv;
+
+	uint32_t reg;		/* convenient holder for the PHY register */
+	uint32_t phy;		/* convenient holder for the PHY */
+	uint32_t start;
+
+	/*
+	 * reading from any PHY's register is done by properly
+	 * programming the FEC's MII data register.
+	 */
+	writel(FEC_IEVENT_MII, &fec->eth->ievent);
+	reg = regAddr << FEC_MII_DATA_RA_SHIFT;
+	phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
+
+	writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_RD | FEC_MII_DATA_TA |
+			phy | reg, &fec->eth->mii_data);
+
+	/*
+	 * wait for the related interrupt
+	 */
+	start = get_timer_masked();
+	while (!(readl(&fec->eth->ievent) & FEC_IEVENT_MII)) {
+		if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
+			printf("Read MDIO failed...\n");
+			return -1;
+		}
+	}
+
+	/*
+	 * clear mii interrupt bit
+	 */
+	writel(FEC_IEVENT_MII, &fec->eth->ievent);
+
+	/*
+	 * it's now safe to read the PHY's register
+	 */
+	*retVal = readl(&fec->eth->mii_data);
+	debug("fec_miiphy_read: phy: %02x reg:%02x val:%#x\n", phyAddr,
+			regAddr, *retVal);
+	return 0;
+}
+
+static int fec_miiphy_write(char *dev, uint8_t phyAddr, uint8_t regAddr,
+		uint16_t data)
+{
+	struct eth_device *edev = eth_get_dev_by_name(dev);
+	struct fec_priv *fec = (struct fec_priv *)edev->priv;
+
+	uint32_t reg;		/* convenient holder for the PHY register */
+	uint32_t phy;		/* convenient holder for the PHY */
+	uint32_t start;
+
+	reg = regAddr << FEC_MII_DATA_RA_SHIFT;
+	phy = phyAddr << FEC_MII_DATA_PA_SHIFT;
+
+	writel(FEC_MII_DATA_ST | FEC_MII_DATA_OP_WR |
+		FEC_MII_DATA_TA | phy | reg | data, &fec->eth->mii_data);
+
+	/*
+	 * wait for the MII interrupt
+	 */
+	start = get_timer_masked();
+	while (!(readl(&fec->eth->ievent) & FEC_IEVENT_MII)) {
+		if (get_timer(start) > (CONFIG_SYS_HZ / 1000)) {
+			printf("Write MDIO failed...\n");
+			return -1;
+		}
+	}
+
+	/*
+	 * clear MII interrupt bit
+	 */
+	writel(FEC_IEVENT_MII, &fec->eth->ievent);
+	debug("fec_miiphy_write: phy: %02x reg:%02x val:%#x\n", phyAddr,
+			regAddr, data);
+
+	return 0;
+}
+
+static int miiphy_restart_aneg(struct eth_device *dev)
+{
+	/*
+	 * Wake up from sleep if necessary
+	 * Reset PHY, then delay 300ns
+	 */
+	miiphy_write(dev->name, CONFIG_FEC_MXC_PHYADDR, PHY_MIPGSR, 0x00FF);
+	miiphy_write(dev->name, CONFIG_FEC_MXC_PHYADDR, PHY_BMCR,
+			PHY_BMCR_RESET);
+	udelay(1000);
+
+	/*
+	 * Set the auto-negotiation advertisement register bits
+	 */
+	miiphy_write(dev->name, CONFIG_FEC_MXC_PHYADDR, PHY_ANAR, 0x1e0);
+	miiphy_write(dev->name, CONFIG_FEC_MXC_PHYADDR, PHY_BMCR,
+			PHY_BMCR_AUTON | PHY_BMCR_RST_NEG);
+
+	return 0;
+}
+
+static int miiphy_wait_aneg(struct eth_device *dev)
+{
+	uint32_t start;
+	uint16_t status;
+
+	/*
+	 * Wait for AN completion
+	 */
+	start = get_timer_masked();
+	do {
+		if (get_timer(start) > (CONFIG_SYS_HZ * 5)) {
+			printf("%s: Autonegotiation timeout\n", dev->name);
+			return -1;
+		}
+
+		if (miiphy_read(dev->name, CONFIG_FEC_MXC_PHYADDR,
+					PHY_BMSR, &status)) {
+			printf("%s: Autonegotiation failed. status: 0x%04x\n",
+					dev->name, status);
+			return -1;
+		}
+	} while (!(status & PHY_BMSR_LS));
+
+	return 0;
+}
+static int fec_rx_task_enable(struct fec_priv *fec)
+{
+	writel(1 << 24, &fec->eth->r_des_active);
+	return 0;
+}
+
+static int fec_rx_task_disable(struct fec_priv *fec)
+{
+	return 0;
+}
+
+static int fec_tx_task_enable(struct fec_priv *fec)
+{
+	writel(1 << 24, &fec->eth->x_des_active);
+	return 0;
+}
+
+static int fec_tx_task_disable(struct fec_priv *fec)
+{
+	return 0;
+}
+
+/**
+ * Initialize receive task's buffer descriptors
+ * @param[in] fec all we know about the device yet
+ * @param[in] count receive buffer count to be allocated
+ * @param[in] size size of each receive buffer
+ * @return 0 on success
+ *
+ * For this task we need additional memory for the data buffers. And each
+ * data buffer requires some alignment. Thy must be aligned to a specific
+ * boundary each (DB_DATA_ALIGNMENT).
+ */
+static int fec_rbd_init(struct fec_priv *fec, int count, int size)
+{
+	int ix;
+	uint32_t p = 0;
+
+	/* reserve data memory and consider alignment */
+	fec->rdb_ptr = malloc(size * count + DB_DATA_ALIGNMENT);
+	p = (uint32_t)fec->rdb_ptr;
+	if (!p) {
+		puts("fec_imx27: not enough malloc memory!\n");
+		return -ENOMEM;
+	}
+	memset((void *)p, 0, size * count + DB_DATA_ALIGNMENT);
+	p += DB_DATA_ALIGNMENT-1;
+	p &= ~(DB_DATA_ALIGNMENT-1);
+
+	for (ix = 0; ix < count; ix++) {
+		writel(p, &fec->rbd_base[ix].data_pointer);
+		p += size;
+		writew(FEC_RBD_EMPTY, &fec->rbd_base[ix].status);
+		writew(0, &fec->rbd_base[ix].data_length);
+	}
+	/*
+	 * mark the last RBD to close the ring
+	 */
+	writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &fec->rbd_base[ix - 1].status);
+	fec->rbd_index = 0;
+
+	return 0;
+}
+
+/**
+ * Initialize transmit task's buffer descriptors
+ * @param[in] fec all we know about the device yet
+ *
+ * Transmit buffers are created externally. We only have to init the BDs here.\n
+ * Note: There is a race condition in the hardware. When only one BD is in
+ * use it must be marked with the WRAP bit to use it for every transmitt.
+ * This bit in combination with the READY bit results into double transmit
+ * of each data buffer. It seems the state machine checks READY earlier then
+ * resetting it after the first transfer.
+ * Using two BDs solves this issue.
+ */
+static void fec_tbd_init(struct fec_priv *fec)
+{
+	writew(0x0000, &fec->tbd_base[0].status);
+	writew(FEC_TBD_WRAP, &fec->tbd_base[1].status);
+	fec->tbd_index = 0;
+}
+
+/**
+ * Mark the given read buffer descriptor as free
+ * @param[in] last 1 if this is the last buffer descriptor in the chain, else 0
+ * @param[in] pRbd buffer descriptor to mark free again
+ */
+static void fec_rbd_clean(int last, struct fec_bd *pRbd)
+{
+	/*
+	 * Reset buffer descriptor as empty
+	 */
+	if (last)
+		writew(FEC_RBD_WRAP | FEC_RBD_EMPTY, &pRbd->status);
+	else
+		writew(FEC_RBD_EMPTY, &pRbd->status);
+	/*
+	 * no data in it
+	 */
+	writew(0, &pRbd->data_length);
+}
+
+static int fec_get_hwaddr(struct eth_device *dev, unsigned char *mac)
+{
+	struct iim_regs *iim = (struct iim_regs *)IMX_IIM_BASE;
+	int i;
+
+	for (i = 0; i < 6; i++)
+		mac[6-1-i] = readl(&iim->iim_bank_area0[IIM0_MAC + i]);
+
+	return is_valid_ether_addr(mac);
+}
+
+static int fec_set_hwaddr(struct eth_device *dev, unsigned char *mac)
+{
+	struct fec_priv *fec = (struct fec_priv *)dev->priv;
+
+	writel(0, &fec->eth->iaddr1);
+	writel(0, &fec->eth->iaddr2);
+	writel(0, &fec->eth->gaddr1);
+	writel(0, &fec->eth->gaddr2);
+
+	/*
+	 * Set physical address
+	 */
+	writel((mac[0] << 24) + (mac[1] << 16) + (mac[2] << 8) + mac[3],
+			&fec->eth->paddr1);
+	writel((mac[4] << 24) + (mac[5] << 16) + 0x8808, &fec->eth->paddr2);
+
+	return 0;
+}
+
+/**
+ * Start the FEC engine
+ * @param[in] dev Our device to handle
+ */
+static int fec_open(struct eth_device *edev)
+{
+	struct fec_priv *fec = (struct fec_priv *)edev->priv;
+
+	debug("fec_open: fec_open(dev)\n");
+	/* full-duplex, heartbeat disabled */
+	writel(1 << 2, &fec->eth->x_cntrl);
+	fec->rbd_index = 0;
+
+	/*
+	 * Enable FEC-Lite controller
+	 */
+	writel(FEC_ECNTRL_ETHER_EN, &fec->eth->ecntrl);
+
+	miiphy_wait_aneg(edev);
+	miiphy_speed(edev->name, 0);
+	miiphy_duplex(edev->name, 0);
+
+	/*
+	 * Enable SmartDMA receive task
+	 */
+	fec_rx_task_enable(fec);
+
+	udelay(100000);
+	return 0;
+}
+
+static int fec_init(struct eth_device *dev, bd_t* bd)
+{
+	uint32_t base;
+	struct fec_priv *fec = (struct fec_priv *)dev->priv;
+
+	/*
+	 * reserve memory for both buffer descriptor chains at once
+	 * Datasheet forces the startaddress of each chain is 16 byte
+	 * aligned
+	 */
+	fec->base_ptr = malloc((2 + FEC_RBD_NUM) *
+			sizeof(struct fec_bd) + DB_ALIGNMENT);
+	base = (uint32_t)fec->base_ptr;
+	if (!base) {
+		puts("fec_imx27: not enough malloc memory!\n");
+		return -ENOMEM;
+	}
+	memset((void *)base, 0, (2 + FEC_RBD_NUM) *
+			sizeof(struct fec_bd) + DB_ALIGNMENT);
+	base += (DB_ALIGNMENT-1);
+	base &= ~(DB_ALIGNMENT-1);
+
+	fec->rbd_base = (struct fec_bd *)base;
+
+	base += FEC_RBD_NUM * sizeof(struct fec_bd);
+
+	fec->tbd_base = (struct fec_bd *)base;
+
+	/*
+	 * Set interrupt mask register
+	 */
+	writel(0x00000000, &fec->eth->imask);
+
+	/*
+	 * Clear FEC-Lite interrupt event register(IEVENT)
+	 */
+	writel(0xffffffff, &fec->eth->ievent);
+
+
+	/*
+	 * Set FEC-Lite receive control register(R_CNTRL):
+	 */
+	if (fec->xcv_type == SEVENWIRE) {
+		/*
+		 * Frame length=1518; 7-wire mode
+		 */
+		writel(0x05ee0020, &fec->eth->r_cntrl);	/* FIXME 0x05ee0000 */
+	} else {
+		/*
+		 * Frame length=1518; MII mode;
+		 */
+		writel(0x05ee0024, &fec->eth->r_cntrl);	/* FIXME 0x05ee0004 */
+		/*
+		 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
+		 * and do not drop the Preamble.
+		 */
+		writel((((imx_get_ahbclk() / 1000000) + 2) / 5) << 1,
+				&fec->eth->mii_speed);
+		debug("fec_init: mii_speed %#lx\n",
+				(((imx_get_ahbclk() / 1000000) + 2) / 5) << 1);
+	}
+	/*
+	 * Set Opcode/Pause Duration Register
+	 */
+	writel(0x00010020, &fec->eth->op_pause);	/* FIXME 0xffff0020; */
+	writel(0x2, &fec->eth->x_wmrk);
+	/*
+	 * Set multicast address filter
+	 */
+	writel(0x00000000, &fec->eth->gaddr1);
+	writel(0x00000000, &fec->eth->gaddr2);
+
+
+	/* clear MIB RAM */
+	long *mib_ptr = (long *)(IMX_FEC_BASE + 0x200);
+	while (mib_ptr <= (long *)(IMX_FEC_BASE + 0x2FC))
+		*mib_ptr++ = 0;
+
+	/* FIFO receive start register */
+	writel(0x520, &fec->eth->r_fstart);
+
+	/* size and address of each buffer */
+	writel(FEC_MAX_PKT_SIZE, &fec->eth->emrbr);
+	writel((uint32_t)fec->tbd_base, &fec->eth->etdsr);
+	writel((uint32_t)fec->rbd_base, &fec->eth->erdsr);
+
+	/*
+	 * Initialize RxBD/TxBD rings
+	 */
+	if (fec_rbd_init(fec, FEC_RBD_NUM, FEC_MAX_PKT_SIZE) < 0) {
+		free(fec->base_ptr);
+		return -ENOMEM;
+	}
+	fec_tbd_init(fec);
+
+
+	if (fec->xcv_type != SEVENWIRE)
+		miiphy_restart_aneg(dev);
+
+	fec_open(dev);
+	return 0;
+}
+
+/**
+ * Halt the FEC engine
+ * @param[in] dev Our device to handle
+ */
+static void fec_halt(struct eth_device *dev)
+{
+	struct fec_priv *fec = &gfec;
+	int counter = 0xffff;
+
+	/*
+	 * issue graceful stop command to the FEC transmitter if necessary
+	 */
+	writel(FEC_ECNTRL_RESET | readl(&fec->eth->x_cntrl),
+			&fec->eth->x_cntrl);
+
+	debug("eth_halt: wait for stop regs\n");
+	/*
+	 * wait for graceful stop to register
+	 */
+	while ((counter--) && (!(readl(&fec->eth->ievent) & FEC_IEVENT_GRA)))
+		;	/* FIXME ensure time */
+
+	/*
+	 * Disable SmartDMA tasks
+	 */
+	fec_tx_task_disable(fec);
+	fec_rx_task_disable(fec);
+
+	/*
+	 * Disable the Ethernet Controller
+	 * Note: this will also reset the BD index counter!
+	 */
+	writel(0, &fec->eth->ecntrl);
+	fec->rbd_index = 0;
+	fec->tbd_index = 0;
+	free(fec->rdb_ptr);
+	free(fec->base_ptr);
+	debug("eth_halt: done\n");
+}
+
+/**
+ * Transmit one frame
+ * @param[in] dev Our ethernet device to handle
+ * @param[in] packet Pointer to the data to be transmitted
+ * @param[in] length Data count in bytes
+ * @return 0 on success
+ */
+static int fec_send(struct eth_device *dev, volatile void* packet, int length)
+{
+	unsigned int status;
+
+	/*
+	 * This routine transmits one frame.  This routine only accepts
+	 * 6-byte Ethernet addresses.
+	 */
+	struct fec_priv *fec = (struct fec_priv *)dev->priv;
+
+	/*
+	 * Check for valid length of data.
+	 */
+	if ((length > 1500) || (length <= 0)) {
+		printf("Payload (%d) to large!\n", length);
+		return -1;
+	}
+
+	/*
+	 * Setup the transmit buffer
+	 * Note: We are always using the first buffer for transmission,
+	 * the second will be empty and only used to stop the DMA engine
+	 */
+	writew(length, &fec->tbd_base[fec->tbd_index].data_length);
+	writel((uint32_t)packet, &fec->tbd_base[fec->tbd_index].data_pointer);
+	/*
+	 * update BD's status now
+	 * This block:
+	 * - is always the last in a chain (means no chain)
+	 * - should transmitt the CRC
+	 * - might be the last BD in the list, so the address counter should
+	 *   wrap (-> keep the WRAP flag)
+	 */
+	status = readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_WRAP;
+	status |= FEC_TBD_LAST | FEC_TBD_TC | FEC_TBD_READY;
+	writew(status, &fec->tbd_base[fec->tbd_index].status);
+
+	/*
+	 * Enable SmartDMA transmit task
+	 */
+	fec_tx_task_enable(fec);
+
+	/*
+	 * wait until frame is sent .
+	 */
+	while (readw(&fec->tbd_base[fec->tbd_index].status) & FEC_TBD_READY) {
+		/* FIXME: Timeout */
+	}
+	debug("fec_send: status 0x%x index %d\n",
+			readw(&fec->tbd_base[fec->tbd_index].status),
+			fec->tbd_index);
+	/* for next transmission use the other buffer */
+	if (fec->tbd_index)
+		fec->tbd_index = 0;
+	else
+		fec->tbd_index = 1;
+
+	return 0;
+}
+
+/**
+ * Pull one frame from the card
+ * @param[in] dev Our ethernet device to handle
+ * @return Length of packet read
+ */
+static int fec_recv(struct eth_device *dev)
+{
+	struct fec_priv *fec = (struct fec_priv *)dev->priv;
+	struct fec_bd *rbd = &fec->rbd_base[fec->rbd_index];
+	unsigned long ievent;
+	int frame_length, len = 0;
+	struct nbuf *frame;
+	uint16_t bd_status;
+	uchar buff[FEC_MAX_PKT_SIZE];
+
+	/*
+	 * Check if any critical events have happened
+	 */
+	ievent = readl(&fec->eth->ievent);
+	writel(ievent, &fec->eth->ievent);
+	debug("fec_recv: ievent 0x%x\n", ievent);
+	if (ievent & FEC_IEVENT_BABR) {
+		fec_halt(dev);
+		fec_init(dev, fec->bd);
+		printf("some error: 0x%08lx\n", ievent);
+		return 0;
+	}
+	if (ievent & FEC_IEVENT_HBERR) {
+		/* Heartbeat error */
+		writel(0x00000001 | readl(&fec->eth->x_cntrl),
+				&fec->eth->x_cntrl);
+	}
+	if (ievent & FEC_IEVENT_GRA) {
+		/* Graceful stop complete */
+		if (readl(&fec->eth->x_cntrl) & 0x00000001) {
+			fec_halt(dev);
+			writel(~0x00000001 & readl(&fec->eth->x_cntrl),
+					&fec->eth->x_cntrl);
+			fec_init(dev, fec->bd);
+		}
+	}
+
+	/*
+	 * ensure reading the right buffer status
+	 */
+	bd_status = readw(&rbd->status);
+	debug("fec_recv: status 0x%x\n", bd_status);
+
+	if (!(bd_status & FEC_RBD_EMPTY)) {
+		if ((bd_status & FEC_RBD_LAST) && !(bd_status & FEC_RBD_ERR) &&
+			((readw(&rbd->data_length) - 4) > 14)) {
+			/*
+			 * Get buffer address and size
+			 */
+			frame = (struct nbuf *)readl(&rbd->data_pointer);
+			frame_length = readw(&rbd->data_length) - 4;
+			/*
+			 *  Fill the buffer and pass it to upper layers
+			 */
+			memcpy(buff, frame->data, frame_length);
+			NetReceive(buff, frame_length);
+			len = frame_length;
+		} else {
+			if (bd_status & FEC_RBD_ERR)
+				printf("error frame: 0x%08lx 0x%08x\n",
+						(ulong)rbd->data_pointer,
+						bd_status);
+		}
+		/*
+		 * free the current buffer, restart the engine
+		 * and move forward to the next buffer
+		 */
+		fec_rbd_clean(fec->rbd_index == (FEC_RBD_NUM - 1) ? 1 : 0, rbd);
+		fec_rx_task_enable(fec);
+		fec->rbd_index = (fec->rbd_index + 1) % FEC_RBD_NUM;
+	}
+	debug("fec_recv: stop\n");
+
+	return len;
+}
+
+static int fec_probe(bd_t *bd)
+{
+	struct pll_regs *pll = (struct pll_regs *)IMX_PLL_BASE;
+	struct eth_device *edev;
+	struct fec_priv *fec = &gfec;
+	unsigned char ethaddr_str[20];
+	unsigned char ethaddr[6];
+	char *tmp = getenv("ethaddr");
+	char *end;
+
+	/* enable FEC clock */
+	writel(readl(&pll->pccr1) | PCCR1_HCLK_FEC, &pll->pccr1);
+	writel(readl(&pll->pccr0) | PCCR0_FEC_EN, &pll->pccr0);
+
+	/* create and fill edev struct */
+	edev = (struct eth_device *)malloc(sizeof(struct eth_device));
+	if (!edev) {
+		puts("fec_imx27: not enough malloc memory!\n");
+		return -ENOMEM;
+	}
+	edev->priv = fec;
+	edev->init = fec_init;
+	edev->send = fec_send;
+	edev->recv = fec_recv;
+	edev->halt = fec_halt;
+
+	fec->eth = (struct ethernet_regs *)IMX_FEC_BASE;
+	fec->bd = bd;
+
+	fec->xcv_type = MII100;
+
+	/* Reset chip. */
+	writel(FEC_ECNTRL_RESET, &fec->eth->ecntrl);
+	while (readl(&fec->eth->ecntrl) & 1)
+		udelay(10);
+
+	/*
+	 * Set interrupt mask register
+	 */
+	writel(0x00000000, &fec->eth->imask);
+
+	/*
+	 * Clear FEC-Lite interrupt event register(IEVENT)
+	 */
+	writel(0xffffffff, &fec->eth->ievent);
+
+	/*
+	 * Set FEC-Lite receive control register(R_CNTRL):
+	 */
+	/*
+	 * Frame length=1518; MII mode;
+	 */
+	writel(0x05ee0024, &fec->eth->r_cntrl);	/* FIXME 0x05ee0004 */
+	/*
+	 * Set MII_SPEED = (1/(mii_speed * 2)) * System Clock
+	 * and do not drop the Preamble.
+	 */
+	writel((((imx_get_ahbclk() / 1000000) + 2) / 5) << 1,
+			&fec->eth->mii_speed);
+	debug("fec_init: mii_speed %#lx\n",
+			(((imx_get_ahbclk() / 1000000) + 2) / 5) << 1);
+
+	sprintf(edev->name, "FEC_MXC");
+
+	miiphy_register(edev->name, fec_miiphy_read, fec_miiphy_write);
+
+	eth_register(edev);
+
+	if ((NULL != tmp) && (12 <= strlen(tmp))) {
+		int i;
+		/* convert MAC from string to int */
+		for (i = 0; i < 6; i++) {
+			ethaddr[i] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
+			if (tmp)
+				tmp = (*end) ? end + 1 : end;
+		}
+	} else if (fec_get_hwaddr(edev, ethaddr) == 0) {
+		printf("got MAC address from EEPROM: %pM\n", ethaddr);
+		setenv("ethaddr", (char *)ethaddr_str);
+	}
+	memcpy(edev->enetaddr, ethaddr, 6);
+	fec_set_hwaddr(edev, ethaddr);
+
+	return 0;
+}
+
+int fecmxc_initialize(bd_t *bd)
+{
+	int lout = 1;
+
+	debug("eth_init: fec_probe(bd)\n");
+	lout = fec_probe(bd);
+
+	return lout;
+}
+
diff --git a/drivers/net/fec_mxc.h b/drivers/net/fec_mxc.h
new file mode 100644
index 0000000..6cb1bfc
--- /dev/null
+++ b/drivers/net/fec_mxc.h
@@ -0,0 +1,304 @@
+/*
+ * (C) Copyright 2009 Ilya Yanok, Emcraft Systems Ltd <yanok@emcraft.com>
+ * (C) Copyright 2008 Armadeus Systems, nc
+ * (C) Copyright 2008 Eric Jarrige <eric.jarrige@armadeus.org>
+ * (C) Copyright 2007 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
+ * (C) Copyright 2007 Pengutronix, Juergen Beisert <j.beisert@pengutronix.de>
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * This file is based on mpc4200fec.h
+ * (C) Copyright Motorola, Inc., 2000
+ *
+ * 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
+ *
+ */
+
+
+#ifndef __FEC_MXC_H
+#define __FEC_MXC_H
+
+/**
+ * Layout description of the FEC
+ */
+struct ethernet_regs {
+
+/* [10:2]addr = 00 */
+
+/*  Control and status Registers (offset 000-1FF) */
+
+	uint32_t res0[1];		/* MBAR_ETH + 0x000 */
+	uint32_t ievent;		/* MBAR_ETH + 0x004 */
+	uint32_t imask;			/* MBAR_ETH + 0x008 */
+
+	uint32_t res1[1];		/* MBAR_ETH + 0x00C */
+	uint32_t r_des_active;		/* MBAR_ETH + 0x010 */
+	uint32_t x_des_active;		/* MBAR_ETH + 0x014 */
+	uint32_t res2[3];		/* MBAR_ETH + 0x018-20 */
+	uint32_t ecntrl;		/* MBAR_ETH + 0x024 */
+
+	uint32_t res3[6];		/* MBAR_ETH + 0x028-03C */
+	uint32_t mii_data;		/* MBAR_ETH + 0x040 */
+	uint32_t mii_speed;		/* MBAR_ETH + 0x044 */
+	uint32_t res4[7];		/* MBAR_ETH + 0x048-60 */
+	uint32_t mib_control;		/* MBAR_ETH + 0x064 */
+
+	uint32_t res5[7];		/* MBAR_ETH + 0x068-80 */
+	uint32_t r_cntrl;		/* MBAR_ETH + 0x084 */
+	uint32_t res6[15];		/* MBAR_ETH + 0x088-C0 */
+	uint32_t x_cntrl;		/* MBAR_ETH + 0x0C4 */
+	uint32_t res7[7];		/* MBAR_ETH + 0x0C8-E0 */
+	uint32_t paddr1;		/* MBAR_ETH + 0x0E4 */
+	uint32_t paddr2;		/* MBAR_ETH + 0x0E8 */
+	uint32_t op_pause;		/* MBAR_ETH + 0x0EC */
+
+	uint32_t res8[10];		/* MBAR_ETH + 0x0F0-114 */
+	uint32_t iaddr1;		/* MBAR_ETH + 0x118 */
+	uint32_t iaddr2;		/* MBAR_ETH + 0x11C */
+	uint32_t gaddr1;		/* MBAR_ETH + 0x120 */
+	uint32_t gaddr2;		/* MBAR_ETH + 0x124 */
+	uint32_t res9[7];		/* MBAR_ETH + 0x128-140 */
+
+	uint32_t x_wmrk;		/* MBAR_ETH + 0x144 */
+	uint32_t res10[1];		/* MBAR_ETH + 0x148 */
+	uint32_t r_bound;		/* MBAR_ETH + 0x14C */
+	uint32_t r_fstart;		/* MBAR_ETH + 0x150 */
+	uint32_t res11[11];		/* MBAR_ETH + 0x154-17C */
+	uint32_t erdsr;			/* MBAR_ETH + 0x180 */
+	uint32_t etdsr;			/* MBAR_ETH + 0x184 */
+	uint32_t emrbr;			/* MBAR_ETH + 0x188 */
+	uint32_t res12[29];		/* MBAR_ETH + 0x18C-1FC */
+
+/*  MIB COUNTERS (Offset 200-2FF) */
+
+	uint32_t rmon_t_drop;		/* MBAR_ETH + 0x200 */
+	uint32_t rmon_t_packets;	/* MBAR_ETH + 0x204 */
+	uint32_t rmon_t_bc_pkt;		/* MBAR_ETH + 0x208 */
+	uint32_t rmon_t_mc_pkt;		/* MBAR_ETH + 0x20C */
+	uint32_t rmon_t_crc_align;	/* MBAR_ETH + 0x210 */
+	uint32_t rmon_t_undersize;	/* MBAR_ETH + 0x214 */
+	uint32_t rmon_t_oversize;	/* MBAR_ETH + 0x218 */
+	uint32_t rmon_t_frag;		/* MBAR_ETH + 0x21C */
+	uint32_t rmon_t_jab;		/* MBAR_ETH + 0x220 */
+	uint32_t rmon_t_col;		/* MBAR_ETH + 0x224 */
+	uint32_t rmon_t_p64;		/* MBAR_ETH + 0x228 */
+	uint32_t rmon_t_p65to127;	/* MBAR_ETH + 0x22C */
+	uint32_t rmon_t_p128to255;	/* MBAR_ETH + 0x230 */
+	uint32_t rmon_t_p256to511;	/* MBAR_ETH + 0x234 */
+	uint32_t rmon_t_p512to1023;	/* MBAR_ETH + 0x238 */
+	uint32_t rmon_t_p1024to2047;	/* MBAR_ETH + 0x23C */
+	uint32_t rmon_t_p_gte2048;	/* MBAR_ETH + 0x240 */
+	uint32_t rmon_t_octets;		/* MBAR_ETH + 0x244 */
+	uint32_t ieee_t_drop;		/* MBAR_ETH + 0x248 */
+	uint32_t ieee_t_frame_ok;	/* MBAR_ETH + 0x24C */
+	uint32_t ieee_t_1col;		/* MBAR_ETH + 0x250 */
+	uint32_t ieee_t_mcol;		/* MBAR_ETH + 0x254 */
+	uint32_t ieee_t_def;		/* MBAR_ETH + 0x258 */
+	uint32_t ieee_t_lcol;		/* MBAR_ETH + 0x25C */
+	uint32_t ieee_t_excol;		/* MBAR_ETH + 0x260 */
+	uint32_t ieee_t_macerr;		/* MBAR_ETH + 0x264 */
+	uint32_t ieee_t_cserr;		/* MBAR_ETH + 0x268 */
+	uint32_t ieee_t_sqe;		/* MBAR_ETH + 0x26C */
+	uint32_t t_fdxfc;		/* MBAR_ETH + 0x270 */
+	uint32_t ieee_t_octets_ok;	/* MBAR_ETH + 0x274 */
+
+	uint32_t res13[2];		/* MBAR_ETH + 0x278-27C */
+	uint32_t rmon_r_drop;		/* MBAR_ETH + 0x280 */
+	uint32_t rmon_r_packets;	/* MBAR_ETH + 0x284 */
+	uint32_t rmon_r_bc_pkt;		/* MBAR_ETH + 0x288 */
+	uint32_t rmon_r_mc_pkt;		/* MBAR_ETH + 0x28C */
+	uint32_t rmon_r_crc_align;	/* MBAR_ETH + 0x290 */
+	uint32_t rmon_r_undersize;	/* MBAR_ETH + 0x294 */
+	uint32_t rmon_r_oversize;	/* MBAR_ETH + 0x298 */
+	uint32_t rmon_r_frag;		/* MBAR_ETH + 0x29C */
+	uint32_t rmon_r_jab;		/* MBAR_ETH + 0x2A0 */
+
+	uint32_t rmon_r_resvd_0;	/* MBAR_ETH + 0x2A4 */
+
+	uint32_t rmon_r_p64;		/* MBAR_ETH + 0x2A8 */
+	uint32_t rmon_r_p65to127;	/* MBAR_ETH + 0x2AC */
+	uint32_t rmon_r_p128to255;	/* MBAR_ETH + 0x2B0 */
+	uint32_t rmon_r_p256to511;	/* MBAR_ETH + 0x2B4 */
+	uint32_t rmon_r_p512to1023;	/* MBAR_ETH + 0x2B8 */
+	uint32_t rmon_r_p1024to2047;	/* MBAR_ETH + 0x2BC */
+	uint32_t rmon_r_p_gte2048;	/* MBAR_ETH + 0x2C0 */
+	uint32_t rmon_r_octets;		/* MBAR_ETH + 0x2C4 */
+	uint32_t ieee_r_drop;		/* MBAR_ETH + 0x2C8 */
+	uint32_t ieee_r_frame_ok;	/* MBAR_ETH + 0x2CC */
+	uint32_t ieee_r_crc;		/* MBAR_ETH + 0x2D0 */
+	uint32_t ieee_r_align;		/* MBAR_ETH + 0x2D4 */
+	uint32_t r_macerr;		/* MBAR_ETH + 0x2D8 */
+	uint32_t r_fdxfc;		/* MBAR_ETH + 0x2DC */
+	uint32_t ieee_r_octets_ok;	/* MBAR_ETH + 0x2E0 */
+
+	uint32_t res14[6];		/* MBAR_ETH + 0x2E4-2FC */
+
+	uint32_t res15[64];		/* MBAR_ETH + 0x300-3FF */
+};
+
+#define FEC_IEVENT_HBERR		0x80000000
+#define FEC_IEVENT_BABR			0x40000000
+#define FEC_IEVENT_BABT			0x20000000
+#define FEC_IEVENT_GRA			0x10000000
+#define FEC_IEVENT_TXF			0x08000000
+#define FEC_IEVENT_TXB			0x04000000
+#define FEC_IEVENT_RXF			0x02000000
+#define FEC_IEVENT_RXB			0x01000000
+#define FEC_IEVENT_MII			0x00800000
+#define FEC_IEVENT_EBERR		0x00400000
+#define FEC_IEVENT_LC			0x00200000
+#define FEC_IEVENT_RL			0x00100000
+#define FEC_IEVENT_UN			0x00080000
+
+#define FEC_IMASK_HBERR			0x80000000
+#define FEC_IMASK_BABR			0x40000000
+#define FEC_IMASKT_BABT			0x20000000
+#define FEC_IMASK_GRA			0x10000000
+#define FEC_IMASKT_TXF			0x08000000
+#define FEC_IMASK_TXB			0x04000000
+#define FEC_IMASKT_RXF			0x02000000
+#define FEC_IMASK_RXB			0x01000000
+#define FEC_IMASK_MII			0x00800000
+#define FEC_IMASK_EBERR			0x00400000
+#define FEC_IMASK_LC			0x00200000
+#define FEC_IMASKT_RL			0x00100000
+#define FEC_IMASK_UN			0x00080000
+
+
+#define FEC_RCNTRL_MAX_FL_SHIFT		16
+#define FEC_RCNTRL_LOOP			0x00000001
+#define FEC_RCNTRL_DRT			0x00000002
+#define FEC_RCNTRL_MII_MODE		0x00000004
+#define FEC_RCNTRL_PROM			0x00000008
+#define FEC_RCNTRL_BC_REJ		0x00000010
+#define FEC_RCNTRL_FCE			0x00000020
+
+#define FEC_TCNTRL_GTS			0x00000001
+#define FEC_TCNTRL_HBC			0x00000002
+#define FEC_TCNTRL_FDEN			0x00000004
+#define FEC_TCNTRL_TFC_PAUSE		0x00000008
+#define FEC_TCNTRL_RFC_PAUSE		0x00000010
+
+#define FEC_ECNTRL_RESET		0x00000001	/* reset the FEC */
+#define FEC_ECNTRL_ETHER_EN		0x00000002	/* enable the FEC */
+
+/**
+ * @brief Descriptor buffer alignment
+ *
+ * i.MX27 requires a 16 byte alignment (but for the first element only)
+ */
+#define DB_ALIGNMENT		16
+
+/**
+ * @brief Data buffer alignment
+ *
+ * i.MX27 requires a four byte alignment for transmit and 16 bits
+ * alignment for receive so take 16
+ * Note: Valid for member data_pointer in struct buffer_descriptor
+ */
+#define DB_DATA_ALIGNMENT	16
+
+/**
+ * @brief Receive & Transmit Buffer Descriptor definitions
+ *
+ * Note: The first BD must be aligned (see DB_ALIGNMENT)
+ */
+struct fec_bd {
+	uint16_t data_length;		/* payload's length in bytes */
+	uint16_t status;		/* BD's staus (see datasheet) */
+	uint32_t data_pointer;		/* payload's buffer address */
+};
+
+/**
+ * Supported phy types on this platform
+ */
+enum xceiver_type {
+	SEVENWIRE,	/* 7-wire       */
+	MII10,		/* MII 10Mbps   */
+	MII100		/* MII 100Mbps  */
+};
+
+/**
+ * @brief i.MX27-FEC private structure
+ */
+struct fec_priv {
+	struct ethernet_regs *eth;	/* pointer to register'S base */
+	enum xceiver_type xcv_type;	/* transceiver type */
+	struct fec_bd *rbd_base;	/* RBD ring */
+	int rbd_index;			/* next receive BD to read */
+	struct fec_bd *tbd_base;	/* TBD ring */
+	int tbd_index;			/* next transmit BD to write */
+	bd_t *bd;
+	void *rdb_ptr;
+	void *base_ptr;
+};
+
+/**
+ * @brief Numbers of buffer descriptors for receiving
+ *
+ * The number defines the stocked memory buffers for the receiving task.
+ * Larger values makes no sense in this limited environment.
+ */
+#define FEC_RBD_NUM		64
+
+/**
+ * @brief Define the ethernet packet size limit in memory
+ *
+ * Note: Do not shrink this number. This will force the FEC to spread larger
+ * frames in more than one BD. This is nothing to worry about, but the current
+ * driver can't handle it.
+ */
+#define FEC_MAX_PKT_SIZE	1536
+
+/* Receive BD status bits */
+#define FEC_RBD_EMPTY	0x8000	/* Receive BD status: Buffer is empty */
+#define FEC_RBD_WRAP	0x2000	/* Receive BD status: Last BD in ring */
+/* Receive BD status: Buffer is last in frame (useless here!) */
+#define FEC_RBD_LAST	0x0800
+#define FEC_RBD_MISS	0x0100	/* Receive BD status: Miss bit for prom mode */
+/* Receive BD status: The received frame is broadcast frame */
+#define FEC_RBD_BC	0x0080
+/* Receive BD status: The received frame is multicast frame */
+#define FEC_RBD_MC	0x0040
+#define FEC_RBD_LG	0x0020	/* Receive BD status: Frame length violation */
+#define FEC_RBD_NO	0x0010	/* Receive BD status: Nonoctet align frame */
+#define FEC_RBD_CR	0x0004	/* Receive BD status: CRC error */
+#define FEC_RBD_OV	0x0002	/* Receive BD status: Receive FIFO overrun */
+#define FEC_RBD_TR	0x0001	/* Receive BD status: Frame is truncated */
+#define FEC_RBD_ERR	(FEC_RBD_LG | FEC_RBD_NO | FEC_RBD_CR | \
+			FEC_RBD_OV | FEC_RBD_TR)
+
+/* Transmit BD status bits */
+#define FEC_TBD_READY	0x8000	/* Tansmit BD status: Buffer is ready */
+#define FEC_TBD_WRAP	0x2000	/* Tansmit BD status: Mark as last BD in ring */
+#define FEC_TBD_LAST	0x0800	/* Tansmit BD status: Buffer is last in frame */
+#define FEC_TBD_TC	0x0400	/* Tansmit BD status: Transmit the CRC */
+#define FEC_TBD_ABC	0x0200	/* Tansmit BD status: Append bad CRC */
+
+/* MII-related definitios */
+#define FEC_MII_DATA_ST		0x40000000	/* Start of frame delimiter */
+#define FEC_MII_DATA_OP_RD	0x20000000	/* Perform a read operation */
+#define FEC_MII_DATA_OP_WR	0x10000000	/* Perform a write operation */
+#define FEC_MII_DATA_PA_MSK	0x0f800000	/* PHY Address field mask */
+#define FEC_MII_DATA_RA_MSK	0x007c0000	/* PHY Register field mask */
+#define FEC_MII_DATA_TA		0x00020000	/* Turnaround */
+#define FEC_MII_DATA_DATAMSK	0x0000ffff	/* PHY data field */
+
+#define FEC_MII_DATA_RA_SHIFT	18	/* MII Register address bits */
+#define FEC_MII_DATA_PA_SHIFT	23	/* MII PHY address bits */
+
+#endif	/* __FEC_MXC_H */
diff --git a/include/netdev.h b/include/netdev.h
index d8056ab..3e66586 100644
--- a/include/netdev.h
+++ b/include/netdev.h
@@ -50,6 +50,7 @@ int e1000_initialize(bd_t *bis);
 int eepro100_initialize(bd_t *bis);
 int eth_3com_initialize (bd_t * bis);
 int fec_initialize (bd_t *bis);
+int fecmxc_initialize (bd_t *bis);
 int greth_initialize(bd_t *bis);
 void gt6426x_eth_initialize(bd_t *bis);
 int inca_switch_initialize(bd_t *bis);