freescale: Move the Freescale drivers

Move the Freescale drivers into drivers/net/ethernet/freescale/ and
make the necessary Kconfig and Makefile changes.

CC: Sandeep Gopalpet <sandeep.kumar@freescale.com>
CC: Andy Fleming <afleming@freescale.com>
CC: Shlomi Gridish <gridish@freescale.com>
CC: Li Yang <leoli@freescale.com>
CC: Pantelis Antoniou <pantelis.antoniou@gmail.com>
CC: Vitaly Bordug <vbordug@ru.mvista.com>
CC: Dan Malek <dmalek@jlc.net>
CC: Sylvain Munaut <tnt@246tNt.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 1663 deletions

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
deleted file mode 100644
index e8266ccf818a..000000000000
--- a/drivers/net/fec.c
+++ /dev/null
@@ -1,1663 +0,0 @@
-/*
- * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
- * Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
- *
- * Right now, I am very wasteful with the buffers.  I allocate memory
- * pages and then divide them into 2K frame buffers.  This way I know I
- * have buffers large enough to hold one frame within one buffer descriptor.
- * Once I get this working, I will use 64 or 128 byte CPM buffers, which
- * will be much more memory efficient and will easily handle lots of
- * small packets.
- *
- * Much better multiple PHY support by Magnus Damm.
- * Copyright (c) 2000 Ericsson Radio Systems AB.
- *
- * Support for FEC controller of ColdFire processors.
- * Copyright (c) 2001-2005 Greg Ungerer (gerg@snapgear.com)
- *
- * Bug fixes and cleanup by Philippe De Muyter (phdm@macqel.be)
- * Copyright (c) 2004-2006 Macq Electronique SA.
- *
- * Copyright (C) 2010 Freescale Semiconductor, Inc.
- */
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/string.h>
-#include <linux/ptrace.h>
-#include <linux/errno.h>
-#include <linux/ioport.h>
-#include <linux/slab.h>
-#include <linux/interrupt.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.h>
-#include <linux/bitops.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/clk.h>
-#include <linux/platform_device.h>
-#include <linux/phy.h>
-#include <linux/fec.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
-#include <linux/of_net.h>
-
-#include <asm/cacheflush.h>
-
-#ifndef CONFIG_ARM
-#include <asm/coldfire.h>
-#include <asm/mcfsim.h>
-#endif
-
-#include "fec.h"
-
-#if defined(CONFIG_ARM)
-#define FEC_ALIGNMENT	0xf
-#else
-#define FEC_ALIGNMENT	0x3
-#endif
-
-#define DRIVER_NAME	"fec"
-
-/* Controller is ENET-MAC */
-#define FEC_QUIRK_ENET_MAC		(1 << 0)
-/* Controller needs driver to swap frame */
-#define FEC_QUIRK_SWAP_FRAME		(1 << 1)
-/* Controller uses gasket */
-#define FEC_QUIRK_USE_GASKET		(1 << 2)
-
-static struct platform_device_id fec_devtype[] = {
-	{
-		/* keep it for coldfire */
-		.name = DRIVER_NAME,
-		.driver_data = 0,
-	}, {
-		.name = "imx25-fec",
-		.driver_data = FEC_QUIRK_USE_GASKET,
-	}, {
-		.name = "imx27-fec",
-		.driver_data = 0,
-	}, {
-		.name = "imx28-fec",
-		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_SWAP_FRAME,
-	}, {
-		/* sentinel */
-	}
-};
-MODULE_DEVICE_TABLE(platform, fec_devtype);
-
-enum imx_fec_type {
-	IMX25_FEC = 1, 	/* runs on i.mx25/50/53 */
-	IMX27_FEC,	/* runs on i.mx27/35/51 */
-	IMX28_FEC,
-};
-
-static const struct of_device_id fec_dt_ids[] = {
-	{ .compatible = "fsl,imx25-fec", .data = &fec_devtype[IMX25_FEC], },
-	{ .compatible = "fsl,imx27-fec", .data = &fec_devtype[IMX27_FEC], },
-	{ .compatible = "fsl,imx28-fec", .data = &fec_devtype[IMX28_FEC], },
-	{ /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, fec_dt_ids);
-
-static unsigned char macaddr[ETH_ALEN];
-module_param_array(macaddr, byte, NULL, 0);
-MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
-
-#if defined(CONFIG_M5272)
-/*
- * Some hardware gets it MAC address out of local flash memory.
- * if this is non-zero then assume it is the address to get MAC from.
- */
-#if defined(CONFIG_NETtel)
-#define	FEC_FLASHMAC	0xf0006006
-#elif defined(CONFIG_GILBARCONAP) || defined(CONFIG_SCALES)
-#define	FEC_FLASHMAC	0xf0006000
-#elif defined(CONFIG_CANCam)
-#define	FEC_FLASHMAC	0xf0020000
-#elif defined (CONFIG_M5272C3)
-#define	FEC_FLASHMAC	(0xffe04000 + 4)
-#elif defined(CONFIG_MOD5272)
-#define FEC_FLASHMAC 	0xffc0406b
-#else
-#define	FEC_FLASHMAC	0
-#endif
-#endif /* CONFIG_M5272 */
-
-/* The number of Tx and Rx buffers.  These are allocated from the page
- * pool.  The code may assume these are power of two, so it it best
- * to keep them that size.
- * We don't need to allocate pages for the transmitter.  We just use
- * the skbuffer directly.
- */
-#define FEC_ENET_RX_PAGES	8
-#define FEC_ENET_RX_FRSIZE	2048
-#define FEC_ENET_RX_FRPPG	(PAGE_SIZE / FEC_ENET_RX_FRSIZE)
-#define RX_RING_SIZE		(FEC_ENET_RX_FRPPG * FEC_ENET_RX_PAGES)
-#define FEC_ENET_TX_FRSIZE	2048
-#define FEC_ENET_TX_FRPPG	(PAGE_SIZE / FEC_ENET_TX_FRSIZE)
-#define TX_RING_SIZE		16	/* Must be power of two */
-#define TX_RING_MOD_MASK	15	/*   for this to work */
-
-#if (((RX_RING_SIZE + TX_RING_SIZE) * 8) > PAGE_SIZE)
-#error "FEC: descriptor ring size constants too large"
-#endif
-
-/* Interrupt events/masks. */
-#define FEC_ENET_HBERR	((uint)0x80000000)	/* Heartbeat error */
-#define FEC_ENET_BABR	((uint)0x40000000)	/* Babbling receiver */
-#define FEC_ENET_BABT	((uint)0x20000000)	/* Babbling transmitter */
-#define FEC_ENET_GRA	((uint)0x10000000)	/* Graceful stop complete */
-#define FEC_ENET_TXF	((uint)0x08000000)	/* Full frame transmitted */
-#define FEC_ENET_TXB	((uint)0x04000000)	/* A buffer was transmitted */
-#define FEC_ENET_RXF	((uint)0x02000000)	/* Full frame received */
-#define FEC_ENET_RXB	((uint)0x01000000)	/* A buffer was received */
-#define FEC_ENET_MII	((uint)0x00800000)	/* MII interrupt */
-#define FEC_ENET_EBERR	((uint)0x00400000)	/* SDMA bus error */
-
-#define FEC_DEFAULT_IMASK (FEC_ENET_TXF | FEC_ENET_RXF | FEC_ENET_MII)
-
-/* The FEC stores dest/src/type, data, and checksum for receive packets.
- */
-#define PKT_MAXBUF_SIZE		1518
-#define PKT_MINBUF_SIZE		64
-#define PKT_MAXBLR_SIZE		1520
-
-
-/*
- * The 5270/5271/5280/5282/532x RX control register also contains maximum frame
- * size bits. Other FEC hardware does not, so we need to take that into
- * account when setting it.
- */
-#if defined(CONFIG_M523x) || defined(CONFIG_M527x) || defined(CONFIG_M528x) || \
-    defined(CONFIG_M520x) || defined(CONFIG_M532x) || defined(CONFIG_ARM)
-#define	OPT_FRAME_SIZE	(PKT_MAXBUF_SIZE << 16)
-#else
-#define	OPT_FRAME_SIZE	0
-#endif
-
-/* The FEC buffer descriptors track the ring buffers.  The rx_bd_base and
- * tx_bd_base always point to the base of the buffer descriptors.  The
- * cur_rx and cur_tx point to the currently available buffer.
- * The dirty_tx tracks the current buffer that is being sent by the
- * controller.  The cur_tx and dirty_tx are equal under both completely
- * empty and completely full conditions.  The empty/ready indicator in
- * the buffer descriptor determines the actual condition.
- */
-struct fec_enet_private {
-	/* Hardware registers of the FEC device */
-	void __iomem *hwp;
-
-	struct net_device *netdev;
-
-	struct clk *clk;
-
-	/* The saved address of a sent-in-place packet/buffer, for skfree(). */
-	unsigned char *tx_bounce[TX_RING_SIZE];
-	struct	sk_buff* tx_skbuff[TX_RING_SIZE];
-	struct	sk_buff* rx_skbuff[RX_RING_SIZE];
-	ushort	skb_cur;
-	ushort	skb_dirty;
-
-	/* CPM dual port RAM relative addresses */
-	dma_addr_t	bd_dma;
-	/* Address of Rx and Tx buffers */
-	struct bufdesc	*rx_bd_base;
-	struct bufdesc	*tx_bd_base;
-	/* The next free ring entry */
-	struct bufdesc	*cur_rx, *cur_tx;
-	/* The ring entries to be free()ed */
-	struct bufdesc	*dirty_tx;
-
-	uint	tx_full;
-	/* hold while accessing the HW like ringbuffer for tx/rx but not MAC */
-	spinlock_t hw_lock;
-
-	struct	platform_device *pdev;
-
-	int	opened;
-
-	/* Phylib and MDIO interface */
-	struct	mii_bus *mii_bus;
-	struct	phy_device *phy_dev;
-	int	mii_timeout;
-	uint	phy_speed;
-	phy_interface_t	phy_interface;
-	int	link;
-	int	full_duplex;
-	struct	completion mdio_done;
-};
-
-/* FEC MII MMFR bits definition */
-#define FEC_MMFR_ST		(1 << 30)
-#define FEC_MMFR_OP_READ	(2 << 28)
-#define FEC_MMFR_OP_WRITE	(1 << 28)
-#define FEC_MMFR_PA(v)		((v & 0x1f) << 23)
-#define FEC_MMFR_RA(v)		((v & 0x1f) << 18)
-#define FEC_MMFR_TA		(2 << 16)
-#define FEC_MMFR_DATA(v)	(v & 0xffff)
-
-#define FEC_MII_TIMEOUT		1000 /* us */
-
-/* Transmitter timeout */
-#define TX_TIMEOUT (2 * HZ)
-
-static void *swap_buffer(void *bufaddr, int len)
-{
-	int i;
-	unsigned int *buf = bufaddr;
-
-	for (i = 0; i < (len + 3) / 4; i++, buf++)
-		*buf = cpu_to_be32(*buf);
-
-	return bufaddr;
-}
-
-static netdev_tx_t
-fec_enet_start_xmit(struct sk_buff *skb, struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	const struct platform_device_id *id_entry =
-				platform_get_device_id(fep->pdev);
-	struct bufdesc *bdp;
-	void *bufaddr;
-	unsigned short	status;
-	unsigned long flags;
-
-	if (!fep->link) {
-		/* Link is down or autonegotiation is in progress. */
-		return NETDEV_TX_BUSY;
-	}
-
-	spin_lock_irqsave(&fep->hw_lock, flags);
-	/* Fill in a Tx ring entry */
-	bdp = fep->cur_tx;
-
-	status = bdp->cbd_sc;
-
-	if (status & BD_ENET_TX_READY) {
-		/* Ooops.  All transmit buffers are full.  Bail out.
-		 * This should not happen, since ndev->tbusy should be set.
-		 */
-		printk("%s: tx queue full!.\n", ndev->name);
-		spin_unlock_irqrestore(&fep->hw_lock, flags);
-		return NETDEV_TX_BUSY;
-	}
-
-	/* Clear all of the status flags */
-	status &= ~BD_ENET_TX_STATS;
-
-	/* Set buffer length and buffer pointer */
-	bufaddr = skb->data;
-	bdp->cbd_datlen = skb->len;
-
-	/*
-	 * On some FEC implementations data must be aligned on
-	 * 4-byte boundaries. Use bounce buffers to copy data
-	 * and get it aligned. Ugh.
-	 */
-	if (((unsigned long) bufaddr) & FEC_ALIGNMENT) {
-		unsigned int index;
-		index = bdp - fep->tx_bd_base;
-		memcpy(fep->tx_bounce[index], skb->data, skb->len);
-		bufaddr = fep->tx_bounce[index];
-	}
-
-	/*
-	 * Some design made an incorrect assumption on endian mode of
-	 * the system that it's running on. As the result, driver has to
-	 * swap every frame going to and coming from the controller.
-	 */
-	if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME)
-		swap_buffer(bufaddr, skb->len);
-
-	/* Save skb pointer */
-	fep->tx_skbuff[fep->skb_cur] = skb;
-
-	ndev->stats.tx_bytes += skb->len;
-	fep->skb_cur = (fep->skb_cur+1) & TX_RING_MOD_MASK;
-
-	/* Push the data cache so the CPM does not get stale memory
-	 * data.
-	 */
-	bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, bufaddr,
-			FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
-
-	/* Send it on its way.  Tell FEC it's ready, interrupt when done,
-	 * it's the last BD of the frame, and to put the CRC on the end.
-	 */
-	status |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
-			| BD_ENET_TX_LAST | BD_ENET_TX_TC);
-	bdp->cbd_sc = status;
-
-	/* Trigger transmission start */
-	writel(0, fep->hwp + FEC_X_DES_ACTIVE);
-
-	/* If this was the last BD in the ring, start at the beginning again. */
-	if (status & BD_ENET_TX_WRAP)
-		bdp = fep->tx_bd_base;
-	else
-		bdp++;
-
-	if (bdp == fep->dirty_tx) {
-		fep->tx_full = 1;
-		netif_stop_queue(ndev);
-	}
-
-	fep->cur_tx = bdp;
-
-	skb_tx_timestamp(skb);
-
-	spin_unlock_irqrestore(&fep->hw_lock, flags);
-
-	return NETDEV_TX_OK;
-}
-
-/* This function is called to start or restart the FEC during a link
- * change.  This only happens when switching between half and full
- * duplex.
- */
-static void
-fec_restart(struct net_device *ndev, int duplex)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	const struct platform_device_id *id_entry =
-				platform_get_device_id(fep->pdev);
-	int i;
-	u32 temp_mac[2];
-	u32 rcntl = OPT_FRAME_SIZE | 0x04;
-
-	/* Whack a reset.  We should wait for this. */
-	writel(1, fep->hwp + FEC_ECNTRL);
-	udelay(10);
-
-	/*
-	 * enet-mac reset will reset mac address registers too,
-	 * so need to reconfigure it.
-	 */
-	if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) {
-		memcpy(&temp_mac, ndev->dev_addr, ETH_ALEN);
-		writel(cpu_to_be32(temp_mac[0]), fep->hwp + FEC_ADDR_LOW);
-		writel(cpu_to_be32(temp_mac[1]), fep->hwp + FEC_ADDR_HIGH);
-	}
-
-	/* Clear any outstanding interrupt. */
-	writel(0xffc00000, fep->hwp + FEC_IEVENT);
-
-	/* Reset all multicast.	*/
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-#ifndef CONFIG_M5272
-	writel(0, fep->hwp + FEC_HASH_TABLE_HIGH);
-	writel(0, fep->hwp + FEC_HASH_TABLE_LOW);
-#endif
-
-	/* Set maximum receive buffer size. */
-	writel(PKT_MAXBLR_SIZE, fep->hwp + FEC_R_BUFF_SIZE);
-
-	/* Set receive and transmit descriptor base. */
-	writel(fep->bd_dma, fep->hwp + FEC_R_DES_START);
-	writel((unsigned long)fep->bd_dma + sizeof(struct bufdesc) * RX_RING_SIZE,
-			fep->hwp + FEC_X_DES_START);
-
-	fep->dirty_tx = fep->cur_tx = fep->tx_bd_base;
-	fep->cur_rx = fep->rx_bd_base;
-
-	/* Reset SKB transmit buffers. */
-	fep->skb_cur = fep->skb_dirty = 0;
-	for (i = 0; i <= TX_RING_MOD_MASK; i++) {
-		if (fep->tx_skbuff[i]) {
-			dev_kfree_skb_any(fep->tx_skbuff[i]);
-			fep->tx_skbuff[i] = NULL;
-		}
-	}
-
-	/* Enable MII mode */
-	if (duplex) {
-		/* FD enable */
-		writel(0x04, fep->hwp + FEC_X_CNTRL);
-	} else {
-		/* No Rcv on Xmit */
-		rcntl |= 0x02;
-		writel(0x0, fep->hwp + FEC_X_CNTRL);
-	}
-
-	fep->full_duplex = duplex;
-
-	/* Set MII speed */
-	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
-
-	/*
-	 * The phy interface and speed need to get configured
-	 * differently on enet-mac.
-	 */
-	if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) {
-		/* Enable flow control and length check */
-		rcntl |= 0x40000000 | 0x00000020;
-
-		/* MII or RMII */
-		if (fep->phy_interface == PHY_INTERFACE_MODE_RMII)
-			rcntl |= (1 << 8);
-		else
-			rcntl &= ~(1 << 8);
-
-		/* 10M or 100M */
-		if (fep->phy_dev && fep->phy_dev->speed == SPEED_100)
-			rcntl &= ~(1 << 9);
-		else
-			rcntl |= (1 << 9);
-
-	} else {
-#ifdef FEC_MIIGSK_ENR
-		if (id_entry->driver_data & FEC_QUIRK_USE_GASKET) {
-			/* disable the gasket and wait */
-			writel(0, fep->hwp + FEC_MIIGSK_ENR);
-			while (readl(fep->hwp + FEC_MIIGSK_ENR) & 4)
-				udelay(1);
-
-			/*
-			 * configure the gasket:
-			 *   RMII, 50 MHz, no loopback, no echo
-			 *   MII, 25 MHz, no loopback, no echo
-			 */
-			writel((fep->phy_interface == PHY_INTERFACE_MODE_RMII) ?
-					1 : 0, fep->hwp + FEC_MIIGSK_CFGR);
-
-
-			/* re-enable the gasket */
-			writel(2, fep->hwp + FEC_MIIGSK_ENR);
-		}
-#endif
-	}
-	writel(rcntl, fep->hwp + FEC_R_CNTRL);
-
-	/* And last, enable the transmit and receive processing */
-	writel(2, fep->hwp + FEC_ECNTRL);
-	writel(0, fep->hwp + FEC_R_DES_ACTIVE);
-
-	/* Enable interrupts we wish to service */
-	writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
-}
-
-static void
-fec_stop(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	/* We cannot expect a graceful transmit stop without link !!! */
-	if (fep->link) {
-		writel(1, fep->hwp + FEC_X_CNTRL); /* Graceful transmit stop */
-		udelay(10);
-		if (!(readl(fep->hwp + FEC_IEVENT) & FEC_ENET_GRA))
-			printk("fec_stop : Graceful transmit stop did not complete !\n");
-	}
-
-	/* Whack a reset.  We should wait for this. */
-	writel(1, fep->hwp + FEC_ECNTRL);
-	udelay(10);
-	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
-	writel(FEC_DEFAULT_IMASK, fep->hwp + FEC_IMASK);
-}
-
-
-static void
-fec_timeout(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	ndev->stats.tx_errors++;
-
-	fec_restart(ndev, fep->full_duplex);
-	netif_wake_queue(ndev);
-}
-
-static void
-fec_enet_tx(struct net_device *ndev)
-{
-	struct	fec_enet_private *fep;
-	struct bufdesc *bdp;
-	unsigned short status;
-	struct	sk_buff	*skb;
-
-	fep = netdev_priv(ndev);
-	spin_lock(&fep->hw_lock);
-	bdp = fep->dirty_tx;
-
-	while (((status = bdp->cbd_sc) & BD_ENET_TX_READY) == 0) {
-		if (bdp == fep->cur_tx && fep->tx_full == 0)
-			break;
-
-		dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
-				FEC_ENET_TX_FRSIZE, DMA_TO_DEVICE);
-		bdp->cbd_bufaddr = 0;
-
-		skb = fep->tx_skbuff[fep->skb_dirty];
-		/* Check for errors. */
-		if (status & (BD_ENET_TX_HB | BD_ENET_TX_LC |
-				   BD_ENET_TX_RL | BD_ENET_TX_UN |
-				   BD_ENET_TX_CSL)) {
-			ndev->stats.tx_errors++;
-			if (status & BD_ENET_TX_HB)  /* No heartbeat */
-				ndev->stats.tx_heartbeat_errors++;
-			if (status & BD_ENET_TX_LC)  /* Late collision */
-				ndev->stats.tx_window_errors++;
-			if (status & BD_ENET_TX_RL)  /* Retrans limit */
-				ndev->stats.tx_aborted_errors++;
-			if (status & BD_ENET_TX_UN)  /* Underrun */
-				ndev->stats.tx_fifo_errors++;
-			if (status & BD_ENET_TX_CSL) /* Carrier lost */
-				ndev->stats.tx_carrier_errors++;
-		} else {
-			ndev->stats.tx_packets++;
-		}
-
-		if (status & BD_ENET_TX_READY)
-			printk("HEY! Enet xmit interrupt and TX_READY.\n");
-
-		/* Deferred means some collisions occurred during transmit,
-		 * but we eventually sent the packet OK.
-		 */
-		if (status & BD_ENET_TX_DEF)
-			ndev->stats.collisions++;
-
-		/* Free the sk buffer associated with this last transmit */
-		dev_kfree_skb_any(skb);
-		fep->tx_skbuff[fep->skb_dirty] = NULL;
-		fep->skb_dirty = (fep->skb_dirty + 1) & TX_RING_MOD_MASK;
-
-		/* Update pointer to next buffer descriptor to be transmitted */
-		if (status & BD_ENET_TX_WRAP)
-			bdp = fep->tx_bd_base;
-		else
-			bdp++;
-
-		/* Since we have freed up a buffer, the ring is no longer full
-		 */
-		if (fep->tx_full) {
-			fep->tx_full = 0;
-			if (netif_queue_stopped(ndev))
-				netif_wake_queue(ndev);
-		}
-	}
-	fep->dirty_tx = bdp;
-	spin_unlock(&fep->hw_lock);
-}
-
-
-/* During a receive, the cur_rx points to the current incoming buffer.
- * When we update through the ring, if the next incoming buffer has
- * not been given to the system, we just set the empty indicator,
- * effectively tossing the packet.
- */
-static void
-fec_enet_rx(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	const struct platform_device_id *id_entry =
-				platform_get_device_id(fep->pdev);
-	struct bufdesc *bdp;
-	unsigned short status;
-	struct	sk_buff	*skb;
-	ushort	pkt_len;
-	__u8 *data;
-
-#ifdef CONFIG_M532x
-	flush_cache_all();
-#endif
-
-	spin_lock(&fep->hw_lock);
-
-	/* First, grab all of the stats for the incoming packet.
-	 * These get messed up if we get called due to a busy condition.
-	 */
-	bdp = fep->cur_rx;
-
-	while (!((status = bdp->cbd_sc) & BD_ENET_RX_EMPTY)) {
-
-		/* Since we have allocated space to hold a complete frame,
-		 * the last indicator should be set.
-		 */
-		if ((status & BD_ENET_RX_LAST) == 0)
-			printk("FEC ENET: rcv is not +last\n");
-
-		if (!fep->opened)
-			goto rx_processing_done;
-
-		/* Check for errors. */
-		if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
-			   BD_ENET_RX_CR | BD_ENET_RX_OV)) {
-			ndev->stats.rx_errors++;
-			if (status & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
-				/* Frame too long or too short. */
-				ndev->stats.rx_length_errors++;
-			}
-			if (status & BD_ENET_RX_NO)	/* Frame alignment */
-				ndev->stats.rx_frame_errors++;
-			if (status & BD_ENET_RX_CR)	/* CRC Error */
-				ndev->stats.rx_crc_errors++;
-			if (status & BD_ENET_RX_OV)	/* FIFO overrun */
-				ndev->stats.rx_fifo_errors++;
-		}
-
-		/* Report late collisions as a frame error.
-		 * On this error, the BD is closed, but we don't know what we
-		 * have in the buffer.  So, just drop this frame on the floor.
-		 */
-		if (status & BD_ENET_RX_CL) {
-			ndev->stats.rx_errors++;
-			ndev->stats.rx_frame_errors++;
-			goto rx_processing_done;
-		}
-
-		/* Process the incoming frame. */
-		ndev->stats.rx_packets++;
-		pkt_len = bdp->cbd_datlen;
-		ndev->stats.rx_bytes += pkt_len;
-		data = (__u8*)__va(bdp->cbd_bufaddr);
-
-		dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
-				FEC_ENET_TX_FRSIZE, DMA_FROM_DEVICE);
-
-		if (id_entry->driver_data & FEC_QUIRK_SWAP_FRAME)
-			swap_buffer(data, pkt_len);
-
-		/* This does 16 byte alignment, exactly what we need.
-		 * The packet length includes FCS, but we don't want to
-		 * include that when passing upstream as it messes up
-		 * bridging applications.
-		 */
-		skb = dev_alloc_skb(pkt_len - 4 + NET_IP_ALIGN);
-
-		if (unlikely(!skb)) {
-			printk("%s: Memory squeeze, dropping packet.\n",
-					ndev->name);
-			ndev->stats.rx_dropped++;
-		} else {
-			skb_reserve(skb, NET_IP_ALIGN);
-			skb_put(skb, pkt_len - 4);	/* Make room */
-			skb_copy_to_linear_data(skb, data, pkt_len - 4);
-			skb->protocol = eth_type_trans(skb, ndev);
-			if (!skb_defer_rx_timestamp(skb))
-				netif_rx(skb);
-		}
-
-		bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, data,
-				FEC_ENET_TX_FRSIZE, DMA_FROM_DEVICE);
-rx_processing_done:
-		/* Clear the status flags for this buffer */
-		status &= ~BD_ENET_RX_STATS;
-
-		/* Mark the buffer empty */
-		status |= BD_ENET_RX_EMPTY;
-		bdp->cbd_sc = status;
-
-		/* Update BD pointer to next entry */
-		if (status & BD_ENET_RX_WRAP)
-			bdp = fep->rx_bd_base;
-		else
-			bdp++;
-		/* Doing this here will keep the FEC running while we process
-		 * incoming frames.  On a heavily loaded network, we should be
-		 * able to keep up at the expense of system resources.
-		 */
-		writel(0, fep->hwp + FEC_R_DES_ACTIVE);
-	}
-	fep->cur_rx = bdp;
-
-	spin_unlock(&fep->hw_lock);
-}
-
-static irqreturn_t
-fec_enet_interrupt(int irq, void *dev_id)
-{
-	struct net_device *ndev = dev_id;
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	uint int_events;
-	irqreturn_t ret = IRQ_NONE;
-
-	do {
-		int_events = readl(fep->hwp + FEC_IEVENT);
-		writel(int_events, fep->hwp + FEC_IEVENT);
-
-		if (int_events & FEC_ENET_RXF) {
-			ret = IRQ_HANDLED;
-			fec_enet_rx(ndev);
-		}
-
-		/* Transmit OK, or non-fatal error. Update the buffer
-		 * descriptors. FEC handles all errors, we just discover
-		 * them as part of the transmit process.
-		 */
-		if (int_events & FEC_ENET_TXF) {
-			ret = IRQ_HANDLED;
-			fec_enet_tx(ndev);
-		}
-
-		if (int_events & FEC_ENET_MII) {
-			ret = IRQ_HANDLED;
-			complete(&fep->mdio_done);
-		}
-	} while (int_events);
-
-	return ret;
-}
-
-
-
-/* ------------------------------------------------------------------------- */
-static void __inline__ fec_get_mac(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct fec_platform_data *pdata = fep->pdev->dev.platform_data;
-	unsigned char *iap, tmpaddr[ETH_ALEN];
-
-	/*
-	 * try to get mac address in following order:
-	 *
-	 * 1) module parameter via kernel command line in form
-	 *    fec.macaddr=0x00,0x04,0x9f,0x01,0x30,0xe0
-	 */
-	iap = macaddr;
-
-#ifdef CONFIG_OF
-	/*
-	 * 2) from device tree data
-	 */
-	if (!is_valid_ether_addr(iap)) {
-		struct device_node *np = fep->pdev->dev.of_node;
-		if (np) {
-			const char *mac = of_get_mac_address(np);
-			if (mac)
-				iap = (unsigned char *) mac;
-		}
-	}
-#endif
-
-	/*
-	 * 3) from flash or fuse (via platform data)
-	 */
-	if (!is_valid_ether_addr(iap)) {
-#ifdef CONFIG_M5272
-		if (FEC_FLASHMAC)
-			iap = (unsigned char *)FEC_FLASHMAC;
-#else
-		if (pdata)
-			memcpy(iap, pdata->mac, ETH_ALEN);
-#endif
-	}
-
-	/*
-	 * 4) FEC mac registers set by bootloader
-	 */
-	if (!is_valid_ether_addr(iap)) {
-		*((unsigned long *) &tmpaddr[0]) =
-			be32_to_cpu(readl(fep->hwp + FEC_ADDR_LOW));
-		*((unsigned short *) &tmpaddr[4]) =
-			be16_to_cpu(readl(fep->hwp + FEC_ADDR_HIGH) >> 16);
-		iap = &tmpaddr[0];
-	}
-
-	memcpy(ndev->dev_addr, iap, ETH_ALEN);
-
-	/* Adjust MAC if using macaddr */
-	if (iap == macaddr)
-		 ndev->dev_addr[ETH_ALEN-1] = macaddr[ETH_ALEN-1] + fep->pdev->id;
-}
-
-/* ------------------------------------------------------------------------- */
-
-/*
- * Phy section
- */
-static void fec_enet_adjust_link(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phy_dev = fep->phy_dev;
-	unsigned long flags;
-
-	int status_change = 0;
-
-	spin_lock_irqsave(&fep->hw_lock, flags);
-
-	/* Prevent a state halted on mii error */
-	if (fep->mii_timeout && phy_dev->state == PHY_HALTED) {
-		phy_dev->state = PHY_RESUMING;
-		goto spin_unlock;
-	}
-
-	/* Duplex link change */
-	if (phy_dev->link) {
-		if (fep->full_duplex != phy_dev->duplex) {
-			fec_restart(ndev, phy_dev->duplex);
-			status_change = 1;
-		}
-	}
-
-	/* Link on or off change */
-	if (phy_dev->link != fep->link) {
-		fep->link = phy_dev->link;
-		if (phy_dev->link)
-			fec_restart(ndev, phy_dev->duplex);
-		else
-			fec_stop(ndev);
-		status_change = 1;
-	}
-
-spin_unlock:
-	spin_unlock_irqrestore(&fep->hw_lock, flags);
-
-	if (status_change)
-		phy_print_status(phy_dev);
-}
-
-static int fec_enet_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
-{
-	struct fec_enet_private *fep = bus->priv;
-	unsigned long time_left;
-
-	fep->mii_timeout = 0;
-	init_completion(&fep->mdio_done);
-
-	/* start a read op */
-	writel(FEC_MMFR_ST | FEC_MMFR_OP_READ |
-		FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
-		FEC_MMFR_TA, fep->hwp + FEC_MII_DATA);
-
-	/* wait for end of transfer */
-	time_left = wait_for_completion_timeout(&fep->mdio_done,
-			usecs_to_jiffies(FEC_MII_TIMEOUT));
-	if (time_left == 0) {
-		fep->mii_timeout = 1;
-		printk(KERN_ERR "FEC: MDIO read timeout\n");
-		return -ETIMEDOUT;
-	}
-
-	/* return value */
-	return FEC_MMFR_DATA(readl(fep->hwp + FEC_MII_DATA));
-}
-
-static int fec_enet_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
-			   u16 value)
-{
-	struct fec_enet_private *fep = bus->priv;
-	unsigned long time_left;
-
-	fep->mii_timeout = 0;
-	init_completion(&fep->mdio_done);
-
-	/* start a write op */
-	writel(FEC_MMFR_ST | FEC_MMFR_OP_WRITE |
-		FEC_MMFR_PA(mii_id) | FEC_MMFR_RA(regnum) |
-		FEC_MMFR_TA | FEC_MMFR_DATA(value),
-		fep->hwp + FEC_MII_DATA);
-
-	/* wait for end of transfer */
-	time_left = wait_for_completion_timeout(&fep->mdio_done,
-			usecs_to_jiffies(FEC_MII_TIMEOUT));
-	if (time_left == 0) {
-		fep->mii_timeout = 1;
-		printk(KERN_ERR "FEC: MDIO write timeout\n");
-		return -ETIMEDOUT;
-	}
-
-	return 0;
-}
-
-static int fec_enet_mdio_reset(struct mii_bus *bus)
-{
-	return 0;
-}
-
-static int fec_enet_mii_probe(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phy_dev = NULL;
-	char mdio_bus_id[MII_BUS_ID_SIZE];
-	char phy_name[MII_BUS_ID_SIZE + 3];
-	int phy_id;
-	int dev_id = fep->pdev->id;
-
-	fep->phy_dev = NULL;
-
-	/* check for attached phy */
-	for (phy_id = 0; (phy_id < PHY_MAX_ADDR); phy_id++) {
-		if ((fep->mii_bus->phy_mask & (1 << phy_id)))
-			continue;
-		if (fep->mii_bus->phy_map[phy_id] == NULL)
-			continue;
-		if (fep->mii_bus->phy_map[phy_id]->phy_id == 0)
-			continue;
-		if (dev_id--)
-			continue;
-		strncpy(mdio_bus_id, fep->mii_bus->id, MII_BUS_ID_SIZE);
-		break;
-	}
-
-	if (phy_id >= PHY_MAX_ADDR) {
-		printk(KERN_INFO "%s: no PHY, assuming direct connection "
-			"to switch\n", ndev->name);
-		strncpy(mdio_bus_id, "0", MII_BUS_ID_SIZE);
-		phy_id = 0;
-	}
-
-	snprintf(phy_name, MII_BUS_ID_SIZE, PHY_ID_FMT, mdio_bus_id, phy_id);
-	phy_dev = phy_connect(ndev, phy_name, &fec_enet_adjust_link, 0,
-		PHY_INTERFACE_MODE_MII);
-	if (IS_ERR(phy_dev)) {
-		printk(KERN_ERR "%s: could not attach to PHY\n", ndev->name);
-		return PTR_ERR(phy_dev);
-	}
-
-	/* mask with MAC supported features */
-	phy_dev->supported &= PHY_BASIC_FEATURES;
-	phy_dev->advertising = phy_dev->supported;
-
-	fep->phy_dev = phy_dev;
-	fep->link = 0;
-	fep->full_duplex = 0;
-
-	printk(KERN_INFO "%s: Freescale FEC PHY driver [%s] "
-		"(mii_bus:phy_addr=%s, irq=%d)\n", ndev->name,
-		fep->phy_dev->drv->name, dev_name(&fep->phy_dev->dev),
-		fep->phy_dev->irq);
-
-	return 0;
-}
-
-static int fec_enet_mii_init(struct platform_device *pdev)
-{
-	static struct mii_bus *fec0_mii_bus;
-	struct net_device *ndev = platform_get_drvdata(pdev);
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	const struct platform_device_id *id_entry =
-				platform_get_device_id(fep->pdev);
-	int err = -ENXIO, i;
-
-	/*
-	 * The dual fec interfaces are not equivalent with enet-mac.
-	 * Here are the differences:
-	 *
-	 *  - fec0 supports MII & RMII modes while fec1 only supports RMII
-	 *  - fec0 acts as the 1588 time master while fec1 is slave
-	 *  - external phys can only be configured by fec0
-	 *
-	 * That is to say fec1 can not work independently. It only works
-	 * when fec0 is working. The reason behind this design is that the
-	 * second interface is added primarily for Switch mode.
-	 *
-	 * Because of the last point above, both phys are attached on fec0
-	 * mdio interface in board design, and need to be configured by
-	 * fec0 mii_bus.
-	 */
-	if ((id_entry->driver_data & FEC_QUIRK_ENET_MAC) && pdev->id) {
-		/* fec1 uses fec0 mii_bus */
-		fep->mii_bus = fec0_mii_bus;
-		return 0;
-	}
-
-	fep->mii_timeout = 0;
-
-	/*
-	 * Set MII speed to 2.5 MHz (= clk_get_rate() / 2 * phy_speed)
-	 */
-	fep->phy_speed = DIV_ROUND_UP(clk_get_rate(fep->clk), 5000000) << 1;
-	writel(fep->phy_speed, fep->hwp + FEC_MII_SPEED);
-
-	fep->mii_bus = mdiobus_alloc();
-	if (fep->mii_bus == NULL) {
-		err = -ENOMEM;
-		goto err_out;
-	}
-
-	fep->mii_bus->name = "fec_enet_mii_bus";
-	fep->mii_bus->read = fec_enet_mdio_read;
-	fep->mii_bus->write = fec_enet_mdio_write;
-	fep->mii_bus->reset = fec_enet_mdio_reset;
-	snprintf(fep->mii_bus->id, MII_BUS_ID_SIZE, "%x", pdev->id + 1);
-	fep->mii_bus->priv = fep;
-	fep->mii_bus->parent = &pdev->dev;
-
-	fep->mii_bus->irq = kmalloc(sizeof(int) * PHY_MAX_ADDR, GFP_KERNEL);
-	if (!fep->mii_bus->irq) {
-		err = -ENOMEM;
-		goto err_out_free_mdiobus;
-	}
-
-	for (i = 0; i < PHY_MAX_ADDR; i++)
-		fep->mii_bus->irq[i] = PHY_POLL;
-
-	if (mdiobus_register(fep->mii_bus))
-		goto err_out_free_mdio_irq;
-
-	/* save fec0 mii_bus */
-	if (id_entry->driver_data & FEC_QUIRK_ENET_MAC)
-		fec0_mii_bus = fep->mii_bus;
-
-	return 0;
-
-err_out_free_mdio_irq:
-	kfree(fep->mii_bus->irq);
-err_out_free_mdiobus:
-	mdiobus_free(fep->mii_bus);
-err_out:
-	return err;
-}
-
-static void fec_enet_mii_remove(struct fec_enet_private *fep)
-{
-	if (fep->phy_dev)
-		phy_disconnect(fep->phy_dev);
-	mdiobus_unregister(fep->mii_bus);
-	kfree(fep->mii_bus->irq);
-	mdiobus_free(fep->mii_bus);
-}
-
-static int fec_enet_get_settings(struct net_device *ndev,
-				  struct ethtool_cmd *cmd)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phydev = fep->phy_dev;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_ethtool_gset(phydev, cmd);
-}
-
-static int fec_enet_set_settings(struct net_device *ndev,
-				 struct ethtool_cmd *cmd)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phydev = fep->phy_dev;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_ethtool_sset(phydev, cmd);
-}
-
-static void fec_enet_get_drvinfo(struct net_device *ndev,
-				 struct ethtool_drvinfo *info)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	strcpy(info->driver, fep->pdev->dev.driver->name);
-	strcpy(info->version, "Revision: 1.0");
-	strcpy(info->bus_info, dev_name(&ndev->dev));
-}
-
-static struct ethtool_ops fec_enet_ethtool_ops = {
-	.get_settings		= fec_enet_get_settings,
-	.set_settings		= fec_enet_set_settings,
-	.get_drvinfo		= fec_enet_get_drvinfo,
-	.get_link		= ethtool_op_get_link,
-};
-
-static int fec_enet_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct phy_device *phydev = fep->phy_dev;
-
-	if (!netif_running(ndev))
-		return -EINVAL;
-
-	if (!phydev)
-		return -ENODEV;
-
-	return phy_mii_ioctl(phydev, rq, cmd);
-}
-
-static void fec_enet_free_buffers(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	int i;
-	struct sk_buff *skb;
-	struct bufdesc	*bdp;
-
-	bdp = fep->rx_bd_base;
-	for (i = 0; i < RX_RING_SIZE; i++) {
-		skb = fep->rx_skbuff[i];
-
-		if (bdp->cbd_bufaddr)
-			dma_unmap_single(&fep->pdev->dev, bdp->cbd_bufaddr,
-					FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
-		if (skb)
-			dev_kfree_skb(skb);
-		bdp++;
-	}
-
-	bdp = fep->tx_bd_base;
-	for (i = 0; i < TX_RING_SIZE; i++)
-		kfree(fep->tx_bounce[i]);
-}
-
-static int fec_enet_alloc_buffers(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	int i;
-	struct sk_buff *skb;
-	struct bufdesc	*bdp;
-
-	bdp = fep->rx_bd_base;
-	for (i = 0; i < RX_RING_SIZE; i++) {
-		skb = dev_alloc_skb(FEC_ENET_RX_FRSIZE);
-		if (!skb) {
-			fec_enet_free_buffers(ndev);
-			return -ENOMEM;
-		}
-		fep->rx_skbuff[i] = skb;
-
-		bdp->cbd_bufaddr = dma_map_single(&fep->pdev->dev, skb->data,
-				FEC_ENET_RX_FRSIZE, DMA_FROM_DEVICE);
-		bdp->cbd_sc = BD_ENET_RX_EMPTY;
-		bdp++;
-	}
-
-	/* Set the last buffer to wrap. */
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	bdp = fep->tx_bd_base;
-	for (i = 0; i < TX_RING_SIZE; i++) {
-		fep->tx_bounce[i] = kmalloc(FEC_ENET_TX_FRSIZE, GFP_KERNEL);
-
-		bdp->cbd_sc = 0;
-		bdp->cbd_bufaddr = 0;
-		bdp++;
-	}
-
-	/* Set the last buffer to wrap. */
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	return 0;
-}
-
-static int
-fec_enet_open(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	int ret;
-
-	/* I should reset the ring buffers here, but I don't yet know
-	 * a simple way to do that.
-	 */
-
-	ret = fec_enet_alloc_buffers(ndev);
-	if (ret)
-		return ret;
-
-	/* Probe and connect to PHY when open the interface */
-	ret = fec_enet_mii_probe(ndev);
-	if (ret) {
-		fec_enet_free_buffers(ndev);
-		return ret;
-	}
-	phy_start(fep->phy_dev);
-	netif_start_queue(ndev);
-	fep->opened = 1;
-	return 0;
-}
-
-static int
-fec_enet_close(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	/* Don't know what to do yet. */
-	fep->opened = 0;
-	netif_stop_queue(ndev);
-	fec_stop(ndev);
-
-	if (fep->phy_dev) {
-		phy_stop(fep->phy_dev);
-		phy_disconnect(fep->phy_dev);
-	}
-
-	fec_enet_free_buffers(ndev);
-
-	return 0;
-}
-
-/* Set or clear the multicast filter for this adaptor.
- * Skeleton taken from sunlance driver.
- * The CPM Ethernet implementation allows Multicast as well as individual
- * MAC address filtering.  Some of the drivers check to make sure it is
- * a group multicast address, and discard those that are not.  I guess I
- * will do the same for now, but just remove the test if you want
- * individual filtering as well (do the upper net layers want or support
- * this kind of feature?).
- */
-
-#define HASH_BITS	6		/* #bits in hash */
-#define CRC32_POLY	0xEDB88320
-
-static void set_multicast_list(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct netdev_hw_addr *ha;
-	unsigned int i, bit, data, crc, tmp;
-	unsigned char hash;
-
-	if (ndev->flags & IFF_PROMISC) {
-		tmp = readl(fep->hwp + FEC_R_CNTRL);
-		tmp |= 0x8;
-		writel(tmp, fep->hwp + FEC_R_CNTRL);
-		return;
-	}
-
-	tmp = readl(fep->hwp + FEC_R_CNTRL);
-	tmp &= ~0x8;
-	writel(tmp, fep->hwp + FEC_R_CNTRL);
-
-	if (ndev->flags & IFF_ALLMULTI) {
-		/* Catch all multicast addresses, so set the
-		 * filter to all 1's
-		 */
-		writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-		writel(0xffffffff, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-
-		return;
-	}
-
-	/* Clear filter and add the addresses in hash register
-	 */
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-	writel(0, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-
-	netdev_for_each_mc_addr(ha, ndev) {
-		/* calculate crc32 value of mac address */
-		crc = 0xffffffff;
-
-		for (i = 0; i < ndev->addr_len; i++) {
-			data = ha->addr[i];
-			for (bit = 0; bit < 8; bit++, data >>= 1) {
-				crc = (crc >> 1) ^
-				(((crc ^ data) & 1) ? CRC32_POLY : 0);
-			}
-		}
-
-		/* only upper 6 bits (HASH_BITS) are used
-		 * which point to specific bit in he hash registers
-		 */
-		hash = (crc >> (32 - HASH_BITS)) & 0x3f;
-
-		if (hash > 31) {
-			tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-			tmp |= 1 << (hash - 32);
-			writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_HIGH);
-		} else {
-			tmp = readl(fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-			tmp |= 1 << hash;
-			writel(tmp, fep->hwp + FEC_GRP_HASH_TABLE_LOW);
-		}
-	}
-}
-
-/* Set a MAC change in hardware. */
-static int
-fec_set_mac_address(struct net_device *ndev, void *p)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct sockaddr *addr = p;
-
-	if (!is_valid_ether_addr(addr->sa_data))
-		return -EADDRNOTAVAIL;
-
-	memcpy(ndev->dev_addr, addr->sa_data, ndev->addr_len);
-
-	writel(ndev->dev_addr[3] | (ndev->dev_addr[2] << 8) |
-		(ndev->dev_addr[1] << 16) | (ndev->dev_addr[0] << 24),
-		fep->hwp + FEC_ADDR_LOW);
-	writel((ndev->dev_addr[5] << 16) | (ndev->dev_addr[4] << 24),
-		fep->hwp + FEC_ADDR_HIGH);
-	return 0;
-}
-
-static const struct net_device_ops fec_netdev_ops = {
-	.ndo_open		= fec_enet_open,
-	.ndo_stop		= fec_enet_close,
-	.ndo_start_xmit		= fec_enet_start_xmit,
-	.ndo_set_multicast_list = set_multicast_list,
-	.ndo_change_mtu		= eth_change_mtu,
-	.ndo_validate_addr	= eth_validate_addr,
-	.ndo_tx_timeout		= fec_timeout,
-	.ndo_set_mac_address	= fec_set_mac_address,
-	.ndo_do_ioctl		= fec_enet_ioctl,
-};
-
- /*
-  * XXX:  We need to clean up on failure exits here.
-  *
-  */
-static int fec_enet_init(struct net_device *ndev)
-{
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct bufdesc *cbd_base;
-	struct bufdesc *bdp;
-	int i;
-
-	/* Allocate memory for buffer descriptors. */
-	cbd_base = dma_alloc_coherent(NULL, PAGE_SIZE, &fep->bd_dma,
-			GFP_KERNEL);
-	if (!cbd_base) {
-		printk("FEC: allocate descriptor memory failed?\n");
-		return -ENOMEM;
-	}
-
-	spin_lock_init(&fep->hw_lock);
-
-	fep->netdev = ndev;
-
-	/* Get the Ethernet address */
-	fec_get_mac(ndev);
-
-	/* Set receive and transmit descriptor base. */
-	fep->rx_bd_base = cbd_base;
-	fep->tx_bd_base = cbd_base + RX_RING_SIZE;
-
-	/* The FEC Ethernet specific entries in the device structure */
-	ndev->watchdog_timeo = TX_TIMEOUT;
-	ndev->netdev_ops = &fec_netdev_ops;
-	ndev->ethtool_ops = &fec_enet_ethtool_ops;
-
-	/* Initialize the receive buffer descriptors. */
-	bdp = fep->rx_bd_base;
-	for (i = 0; i < RX_RING_SIZE; i++) {
-
-		/* Initialize the BD for every fragment in the page. */
-		bdp->cbd_sc = 0;
-		bdp++;
-	}
-
-	/* Set the last buffer to wrap */
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	/* ...and the same for transmit */
-	bdp = fep->tx_bd_base;
-	for (i = 0; i < TX_RING_SIZE; i++) {
-
-		/* Initialize the BD for every fragment in the page. */
-		bdp->cbd_sc = 0;
-		bdp->cbd_bufaddr = 0;
-		bdp++;
-	}
-
-	/* Set the last buffer to wrap */
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	fec_restart(ndev, 0);
-
-	return 0;
-}
-
-#ifdef CONFIG_OF
-static int __devinit fec_get_phy_mode_dt(struct platform_device *pdev)
-{
-	struct device_node *np = pdev->dev.of_node;
-
-	if (np)
-		return of_get_phy_mode(np);
-
-	return -ENODEV;
-}
-
-static int __devinit fec_reset_phy(struct platform_device *pdev)
-{
-	int err, phy_reset;
-	struct device_node *np = pdev->dev.of_node;
-
-	if (!np)
-		return -ENODEV;
-
-	phy_reset = of_get_named_gpio(np, "phy-reset-gpios", 0);
-	err = gpio_request_one(phy_reset, GPIOF_OUT_INIT_LOW, "phy-reset");
-	if (err) {
-		pr_warn("FEC: failed to get gpio phy-reset: %d\n", err);
-		return err;
-	}
-	msleep(1);
-	gpio_set_value(phy_reset, 1);
-
-	return 0;
-}
-#else /* CONFIG_OF */
-static inline int fec_get_phy_mode_dt(struct platform_device *pdev)
-{
-	return -ENODEV;
-}
-
-static inline int fec_reset_phy(struct platform_device *pdev)
-{
-	/*
-	 * In case of platform probe, the reset has been done
-	 * by machine code.
-	 */
-	return 0;
-}
-#endif /* CONFIG_OF */
-
-static int __devinit
-fec_probe(struct platform_device *pdev)
-{
-	struct fec_enet_private *fep;
-	struct fec_platform_data *pdata;
-	struct net_device *ndev;
-	int i, irq, ret = 0;
-	struct resource *r;
-	const struct of_device_id *of_id;
-
-	of_id = of_match_device(fec_dt_ids, &pdev->dev);
-	if (of_id)
-		pdev->id_entry = of_id->data;
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r)
-		return -ENXIO;
-
-	r = request_mem_region(r->start, resource_size(r), pdev->name);
-	if (!r)
-		return -EBUSY;
-
-	/* Init network device */
-	ndev = alloc_etherdev(sizeof(struct fec_enet_private));
-	if (!ndev) {
-		ret = -ENOMEM;
-		goto failed_alloc_etherdev;
-	}
-
-	SET_NETDEV_DEV(ndev, &pdev->dev);
-
-	/* setup board info structure */
-	fep = netdev_priv(ndev);
-
-	fep->hwp = ioremap(r->start, resource_size(r));
-	fep->pdev = pdev;
-
-	if (!fep->hwp) {
-		ret = -ENOMEM;
-		goto failed_ioremap;
-	}
-
-	platform_set_drvdata(pdev, ndev);
-
-	ret = fec_get_phy_mode_dt(pdev);
-	if (ret < 0) {
-		pdata = pdev->dev.platform_data;
-		if (pdata)
-			fep->phy_interface = pdata->phy;
-		else
-			fep->phy_interface = PHY_INTERFACE_MODE_MII;
-	} else {
-		fep->phy_interface = ret;
-	}
-
-	fec_reset_phy(pdev);
-
-	/* This device has up to three irqs on some platforms */
-	for (i = 0; i < 3; i++) {
-		irq = platform_get_irq(pdev, i);
-		if (i && irq < 0)
-			break;
-		ret = request_irq(irq, fec_enet_interrupt, IRQF_DISABLED, pdev->name, ndev);
-		if (ret) {
-			while (--i >= 0) {
-				irq = platform_get_irq(pdev, i);
-				free_irq(irq, ndev);
-			}
-			goto failed_irq;
-		}
-	}
-
-	fep->clk = clk_get(&pdev->dev, "fec_clk");
-	if (IS_ERR(fep->clk)) {
-		ret = PTR_ERR(fep->clk);
-		goto failed_clk;
-	}
-	clk_enable(fep->clk);
-
-	ret = fec_enet_init(ndev);
-	if (ret)
-		goto failed_init;
-
-	ret = fec_enet_mii_init(pdev);
-	if (ret)
-		goto failed_mii_init;
-
-	/* Carrier starts down, phylib will bring it up */
-	netif_carrier_off(ndev);
-
-	ret = register_netdev(ndev);
-	if (ret)
-		goto failed_register;
-
-	return 0;
-
-failed_register:
-	fec_enet_mii_remove(fep);
-failed_mii_init:
-failed_init:
-	clk_disable(fep->clk);
-	clk_put(fep->clk);
-failed_clk:
-	for (i = 0; i < 3; i++) {
-		irq = platform_get_irq(pdev, i);
-		if (irq > 0)
-			free_irq(irq, ndev);
-	}
-failed_irq:
-	iounmap(fep->hwp);
-failed_ioremap:
-	free_netdev(ndev);
-failed_alloc_etherdev:
-	release_mem_region(r->start, resource_size(r));
-
-	return ret;
-}
-
-static int __devexit
-fec_drv_remove(struct platform_device *pdev)
-{
-	struct net_device *ndev = platform_get_drvdata(pdev);
-	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct resource *r;
-
-	fec_stop(ndev);
-	fec_enet_mii_remove(fep);
-	clk_disable(fep->clk);
-	clk_put(fep->clk);
-	iounmap(fep->hwp);
-	unregister_netdev(ndev);
-	free_netdev(ndev);
-
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	BUG_ON(!r);
-	release_mem_region(r->start, resource_size(r));
-
-	platform_set_drvdata(pdev, NULL);
-
-	return 0;
-}
-
-#ifdef CONFIG_PM
-static int
-fec_suspend(struct device *dev)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	if (netif_running(ndev)) {
-		fec_stop(ndev);
-		netif_device_detach(ndev);
-	}
-	clk_disable(fep->clk);
-
-	return 0;
-}
-
-static int
-fec_resume(struct device *dev)
-{
-	struct net_device *ndev = dev_get_drvdata(dev);
-	struct fec_enet_private *fep = netdev_priv(ndev);
-
-	clk_enable(fep->clk);
-	if (netif_running(ndev)) {
-		fec_restart(ndev, fep->full_duplex);
-		netif_device_attach(ndev);
-	}
-
-	return 0;
-}
-
-static const struct dev_pm_ops fec_pm_ops = {
-	.suspend	= fec_suspend,
-	.resume		= fec_resume,
-	.freeze		= fec_suspend,
-	.thaw		= fec_resume,
-	.poweroff	= fec_suspend,
-	.restore	= fec_resume,
-};
-#endif
-
-static struct platform_driver fec_driver = {
-	.driver	= {
-		.name	= DRIVER_NAME,
-		.owner	= THIS_MODULE,
-#ifdef CONFIG_PM
-		.pm	= &fec_pm_ops,
-#endif
-		.of_match_table = fec_dt_ids,
-	},
-	.id_table = fec_devtype,
-	.probe	= fec_probe,
-	.remove	= __devexit_p(fec_drv_remove),
-};
-
-static int __init
-fec_enet_module_init(void)
-{
-	printk(KERN_INFO "FEC Ethernet Driver\n");
-
-	return platform_driver_register(&fec_driver);
-}
-
-static void __exit
-fec_enet_cleanup(void)
-{
-	platform_driver_unregister(&fec_driver);
-}
-
-module_exit(fec_enet_cleanup);
-module_init(fec_enet_module_init);
-
-MODULE_LICENSE("GPL");