Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 2259 insertions, 0 deletions

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
new file mode 100644
index 000000000000..2c7008491378
--- /dev/null
+++ b/drivers/net/fec.c
@@ -0,0 +1,2259 @@
+/*
+ * Fast Ethernet Controller (FEC) driver for Motorola MPC8xx.
+ * Copyright (c) 1997 Dan Malek (dmalek@jlc.net)
+ *
+ * This version of the driver is specific to the FADS implementation,
+ * since the board contains control registers external to the processor
+ * for the control of the LevelOne LXT970 transceiver.  The MPC860T manual
+ * describes connections using the internal parallel port I/O, which
+ * is basically all of Port D.
+ *
+ * Right now, I am very watseful 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/5270/5271/5272/5274/5275/5280/5282.
+ * Copyrught (c) 2001-2004 Greg Ungerer (gerg@snapgear.com)
+ */
+
+#include <linux/config.h>
+#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 <asm/irq.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+
+#if defined(CONFIG_M527x) || defined(CONFIG_M5272) || defined(CONFIG_M528x)
+#include <asm/coldfire.h>
+#include <asm/mcfsim.h>
+#include "fec.h"
+#else
+#include <asm/8xx_immap.h>
+#include <asm/mpc8xx.h>
+#include "commproc.h"
+#endif
+
+#if defined(CONFIG_FEC2)
+#define	FEC_MAX_PORTS	2
+#else
+#define	FEC_MAX_PORTS	1
+#endif
+
+/*
+ * Define the fixed address of the FEC hardware.
+ */
+static unsigned int fec_hw[] = {
+#if defined(CONFIG_M5272)
+	(MCF_MBAR + 0x840),
+#elif defined(CONFIG_M527x)
+	(MCF_MBAR + 0x1000),
+	(MCF_MBAR + 0x1800),
+#elif defined(CONFIG_M528x)
+	(MCF_MBAR + 0x1000),
+#else
+	&(((immap_t *)IMAP_ADDR)->im_cpm.cp_fec),
+#endif
+};
+
+static unsigned char	fec_mac_default[] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+};
+
+/*
+ * 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_MTD_KeyTechnology)
+#define	FEC_FLASHMAC	0xffe04000
+#elif defined(CONFIG_CANCam)
+#define	FEC_FLASHMAC	0xf0020000
+#else
+#define	FEC_FLASHMAC	0
+#endif
+
+unsigned char *fec_flashmac = (unsigned char *) FEC_FLASHMAC;
+
+/* Forward declarations of some structures to support different PHYs
+*/
+
+typedef struct {
+	uint mii_data;
+	void (*funct)(uint mii_reg, struct net_device *dev);
+} phy_cmd_t;
+
+typedef struct {
+	uint id;
+	char *name;
+
+	const phy_cmd_t *config;
+	const phy_cmd_t *startup;
+	const phy_cmd_t *ack_int;
+	const phy_cmd_t *shutdown;
+} phy_info_t;
+
+/* 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 */
+
+/* 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 */
+
+/* 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 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_M527x) || defined(CONFIG_M528x)
+#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 */
+	volatile fec_t	*hwp;
+
+	/* 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];
+	ushort	skb_cur;
+	ushort	skb_dirty;
+
+	/* CPM dual port RAM relative addresses.
+	*/
+	cbd_t	*rx_bd_base;		/* Address of Rx and Tx buffers. */
+	cbd_t	*tx_bd_base;
+	cbd_t	*cur_rx, *cur_tx;		/* The next free ring entry */
+	cbd_t	*dirty_tx;	/* The ring entries to be free()ed. */
+	struct	net_device_stats stats;
+	uint	tx_full;
+	spinlock_t lock;
+
+	uint	phy_id;
+	uint	phy_id_done;
+	uint	phy_status;
+	uint	phy_speed;
+	phy_info_t	*phy;
+	struct work_struct phy_task;
+
+	uint	sequence_done;
+	uint	mii_phy_task_queued;
+
+	uint	phy_addr;
+
+	int	index;
+	int	opened;
+	int	link;
+	int	old_link;
+	int	full_duplex;
+	unsigned char mac_addr[ETH_ALEN];
+};
+
+static int fec_enet_open(struct net_device *dev);
+static int fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static void fec_enet_mii(struct net_device *dev);
+static irqreturn_t fec_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+static void fec_enet_tx(struct net_device *dev);
+static void fec_enet_rx(struct net_device *dev);
+static int fec_enet_close(struct net_device *dev);
+static struct net_device_stats *fec_enet_get_stats(struct net_device *dev);
+static void set_multicast_list(struct net_device *dev);
+static void fec_restart(struct net_device *dev, int duplex);
+static void fec_stop(struct net_device *dev);
+static void fec_set_mac_address(struct net_device *dev);
+
+
+/* MII processing.  We keep this as simple as possible.  Requests are
+ * placed on the list (if there is room).  When the request is finished
+ * by the MII, an optional function may be called.
+ */
+typedef struct mii_list {
+	uint	mii_regval;
+	void	(*mii_func)(uint val, struct net_device *dev);
+	struct	mii_list *mii_next;
+} mii_list_t;
+
+#define		NMII	20
+mii_list_t	mii_cmds[NMII];
+mii_list_t	*mii_free;
+mii_list_t	*mii_head;
+mii_list_t	*mii_tail;
+
+static int	mii_queue(struct net_device *dev, int request, 
+				void (*func)(uint, struct net_device *));
+
+/* Make MII read/write commands for the FEC.
+*/
+#define mk_mii_read(REG)	(0x60020000 | ((REG & 0x1f) << 18))
+#define mk_mii_write(REG, VAL)	(0x50020000 | ((REG & 0x1f) << 18) | \
+						(VAL & 0xffff))
+#define mk_mii_end	0
+
+/* Transmitter timeout.
+*/
+#define TX_TIMEOUT (2*HZ)
+
+/* Register definitions for the PHY.
+*/
+
+#define MII_REG_CR          0  /* Control Register                         */
+#define MII_REG_SR          1  /* Status Register                          */
+#define MII_REG_PHYIR1      2  /* PHY Identification Register 1            */
+#define MII_REG_PHYIR2      3  /* PHY Identification Register 2            */
+#define MII_REG_ANAR        4  /* A-N Advertisement Register               */ 
+#define MII_REG_ANLPAR      5  /* A-N Link Partner Ability Register        */
+#define MII_REG_ANER        6  /* A-N Expansion Register                   */
+#define MII_REG_ANNPTR      7  /* A-N Next Page Transmit Register          */
+#define MII_REG_ANLPRNPR    8  /* A-N Link Partner Received Next Page Reg. */
+
+/* values for phy_status */
+
+#define PHY_CONF_ANE	0x0001  /* 1 auto-negotiation enabled */
+#define PHY_CONF_LOOP	0x0002  /* 1 loopback mode enabled */
+#define PHY_CONF_SPMASK	0x00f0  /* mask for speed */
+#define PHY_CONF_10HDX	0x0010  /* 10 Mbit half duplex supported */
+#define PHY_CONF_10FDX	0x0020  /* 10 Mbit full duplex supported */ 
+#define PHY_CONF_100HDX	0x0040  /* 100 Mbit half duplex supported */
+#define PHY_CONF_100FDX	0x0080  /* 100 Mbit full duplex supported */ 
+
+#define PHY_STAT_LINK	0x0100  /* 1 up - 0 down */
+#define PHY_STAT_FAULT	0x0200  /* 1 remote fault */
+#define PHY_STAT_ANC	0x0400  /* 1 auto-negotiation complete	*/
+#define PHY_STAT_SPMASK	0xf000  /* mask for speed */
+#define PHY_STAT_10HDX	0x1000  /* 10 Mbit half duplex selected	*/
+#define PHY_STAT_10FDX	0x2000  /* 10 Mbit full duplex selected	*/ 
+#define PHY_STAT_100HDX	0x4000  /* 100 Mbit half duplex selected */
+#define PHY_STAT_100FDX	0x8000  /* 100 Mbit full duplex selected */ 
+
+
+static int
+fec_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+	struct fec_enet_private *fep;
+	volatile fec_t	*fecp;
+	volatile cbd_t	*bdp;
+
+	fep = netdev_priv(dev);
+	fecp = (volatile fec_t*)dev->base_addr;
+
+	if (!fep->link) {
+		/* Link is down or autonegotiation is in progress. */
+		return 1;
+	}
+
+	/* Fill in a Tx ring entry */
+	bdp = fep->cur_tx;
+
+#ifndef final_version
+	if (bdp->cbd_sc & BD_ENET_TX_READY) {
+		/* Ooops.  All transmit buffers are full.  Bail out.
+		 * This should not happen, since dev->tbusy should be set.
+		 */
+		printk("%s: tx queue full!.\n", dev->name);
+		return 1;
+	}
+#endif
+
+	/* Clear all of the status flags.
+	 */
+	bdp->cbd_sc &= ~BD_ENET_TX_STATS;
+
+	/* Set buffer length and buffer pointer.
+	*/
+	bdp->cbd_bufaddr = __pa(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 (bdp->cbd_bufaddr & 0x3) {
+		unsigned int index;
+		index = bdp - fep->tx_bd_base;
+		memcpy(fep->tx_bounce[index], (void *) bdp->cbd_bufaddr, bdp->cbd_datlen);
+		bdp->cbd_bufaddr = __pa(fep->tx_bounce[index]);
+	}
+
+	/* Save skb pointer.
+	*/
+	fep->tx_skbuff[fep->skb_cur] = skb;
+
+	fep->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.
+	 */
+	flush_dcache_range((unsigned long)skb->data,
+			   (unsigned long)skb->data + skb->len);
+
+	spin_lock_irq(&fep->lock);
+
+	/* Send it on its way.  Tell FEC its ready, interrupt when done,
+	 * its the last BD of the frame, and to put the CRC on the end.
+	 */
+
+	bdp->cbd_sc |= (BD_ENET_TX_READY | BD_ENET_TX_INTR
+			| BD_ENET_TX_LAST | BD_ENET_TX_TC);
+
+	dev->trans_start = jiffies;
+
+	/* Trigger transmission start */
+	fecp->fec_x_des_active = 0x01000000;
+
+	/* If this was the last BD in the ring, start at the beginning again.
+	*/
+	if (bdp->cbd_sc & BD_ENET_TX_WRAP) {
+		bdp = fep->tx_bd_base;
+	} else {
+		bdp++;
+	}
+
+	if (bdp == fep->dirty_tx) {
+		fep->tx_full = 1;
+		netif_stop_queue(dev);
+	}
+
+	fep->cur_tx = (cbd_t *)bdp;
+
+	spin_unlock_irq(&fep->lock);
+
+	return 0;
+}
+
+static void
+fec_timeout(struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+
+	printk("%s: transmit timed out.\n", dev->name);
+	fep->stats.tx_errors++;
+#ifndef final_version
+	{
+	int	i;
+	cbd_t	*bdp;
+
+	printk("Ring data dump: cur_tx %lx%s, dirty_tx %lx cur_rx: %lx\n",
+	       (unsigned long)fep->cur_tx, fep->tx_full ? " (full)" : "",
+	       (unsigned long)fep->dirty_tx,
+	       (unsigned long)fep->cur_rx);
+
+	bdp = fep->tx_bd_base;
+	printk(" tx: %u buffers\n",  TX_RING_SIZE);
+	for (i = 0 ; i < TX_RING_SIZE; i++) {
+		printk("  %08x: %04x %04x %08x\n", 
+		       (uint) bdp,
+		       bdp->cbd_sc,
+		       bdp->cbd_datlen,
+		       (int) bdp->cbd_bufaddr);
+		bdp++;
+	}
+
+	bdp = fep->rx_bd_base;
+	printk(" rx: %lu buffers\n",  (unsigned long) RX_RING_SIZE);
+	for (i = 0 ; i < RX_RING_SIZE; i++) {
+		printk("  %08x: %04x %04x %08x\n",
+		       (uint) bdp,
+		       bdp->cbd_sc,
+		       bdp->cbd_datlen,
+		       (int) bdp->cbd_bufaddr);
+		bdp++;
+	}
+	}
+#endif
+	fec_restart(dev, 0);
+	netif_wake_queue(dev);
+}
+
+/* The interrupt handler.
+ * This is called from the MPC core interrupt.
+ */
+static irqreturn_t
+fec_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+{
+	struct	net_device *dev = dev_id;
+	volatile fec_t	*fecp;
+	uint	int_events;
+	int handled = 0;
+
+	fecp = (volatile fec_t*)dev->base_addr;
+
+	/* Get the interrupt events that caused us to be here.
+	*/
+	while ((int_events = fecp->fec_ievent) != 0) {
+		fecp->fec_ievent = int_events;
+
+		/* Handle receive event in its own function.
+		 */
+		if (int_events & FEC_ENET_RXF) {
+			handled = 1;
+			fec_enet_rx(dev);
+		}
+
+		/* 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) {
+			handled = 1;
+			fec_enet_tx(dev);
+		}
+
+		if (int_events & FEC_ENET_MII) {
+			handled = 1;
+			fec_enet_mii(dev);
+		}
+	
+	}
+	return IRQ_RETVAL(handled);
+}
+
+
+static void
+fec_enet_tx(struct net_device *dev)
+{
+	struct	fec_enet_private *fep;
+	volatile cbd_t	*bdp;
+	struct	sk_buff	*skb;
+
+	fep = netdev_priv(dev);
+	spin_lock(&fep->lock);
+	bdp = fep->dirty_tx;
+
+	while ((bdp->cbd_sc&BD_ENET_TX_READY) == 0) {
+		if (bdp == fep->cur_tx && fep->tx_full == 0) break;
+
+		skb = fep->tx_skbuff[fep->skb_dirty];
+		/* Check for errors. */
+		if (bdp->cbd_sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
+				   BD_ENET_TX_RL | BD_ENET_TX_UN |
+				   BD_ENET_TX_CSL)) {
+			fep->stats.tx_errors++;
+			if (bdp->cbd_sc & BD_ENET_TX_HB)  /* No heartbeat */
+				fep->stats.tx_heartbeat_errors++;
+			if (bdp->cbd_sc & BD_ENET_TX_LC)  /* Late collision */
+				fep->stats.tx_window_errors++;
+			if (bdp->cbd_sc & BD_ENET_TX_RL)  /* Retrans limit */
+				fep->stats.tx_aborted_errors++;
+			if (bdp->cbd_sc & BD_ENET_TX_UN)  /* Underrun */
+				fep->stats.tx_fifo_errors++;
+			if (bdp->cbd_sc & BD_ENET_TX_CSL) /* Carrier lost */
+				fep->stats.tx_carrier_errors++;
+		} else {
+			fep->stats.tx_packets++;
+		}
+
+#ifndef final_version
+		if (bdp->cbd_sc & BD_ENET_TX_READY)
+			printk("HEY! Enet xmit interrupt and TX_READY.\n");
+#endif
+		/* Deferred means some collisions occurred during transmit,
+		 * but we eventually sent the packet OK.
+		 */
+		if (bdp->cbd_sc & BD_ENET_TX_DEF)
+			fep->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 (bdp->cbd_sc & 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(dev))
+				netif_wake_queue(dev);
+		}
+	}
+	fep->dirty_tx = (cbd_t *)bdp;
+	spin_unlock(&fep->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 *dev)
+{
+	struct	fec_enet_private *fep;
+	volatile fec_t	*fecp;
+	volatile cbd_t *bdp;
+	struct	sk_buff	*skb;
+	ushort	pkt_len;
+	__u8 *data;
+
+	fep = netdev_priv(dev);
+	fecp = (volatile fec_t*)dev->base_addr;
+
+	/* 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 (!(bdp->cbd_sc & BD_ENET_RX_EMPTY)) {
+
+#ifndef final_version
+	/* Since we have allocated space to hold a complete frame,
+	 * the last indicator should be set.
+	 */
+	if ((bdp->cbd_sc & BD_ENET_RX_LAST) == 0)
+		printk("FEC ENET: rcv is not +last\n");
+#endif
+
+	if (!fep->opened)
+		goto rx_processing_done;
+
+	/* Check for errors. */
+	if (bdp->cbd_sc & (BD_ENET_RX_LG | BD_ENET_RX_SH | BD_ENET_RX_NO |
+			   BD_ENET_RX_CR | BD_ENET_RX_OV)) {
+		fep->stats.rx_errors++;       
+		if (bdp->cbd_sc & (BD_ENET_RX_LG | BD_ENET_RX_SH)) {
+		/* Frame too long or too short. */
+			fep->stats.rx_length_errors++;
+		}
+		if (bdp->cbd_sc & BD_ENET_RX_NO)	/* Frame alignment */
+			fep->stats.rx_frame_errors++;
+		if (bdp->cbd_sc & BD_ENET_RX_CR)	/* CRC Error */
+			fep->stats.rx_crc_errors++;
+		if (bdp->cbd_sc & BD_ENET_RX_OV)	/* FIFO overrun */
+			fep->stats.rx_crc_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 (bdp->cbd_sc & BD_ENET_RX_CL) {
+		fep->stats.rx_errors++;
+		fep->stats.rx_frame_errors++;
+		goto rx_processing_done;
+	}
+
+	/* Process the incoming frame.
+	 */
+	fep->stats.rx_packets++;
+	pkt_len = bdp->cbd_datlen;
+	fep->stats.rx_bytes += pkt_len;
+	data = (__u8*)__va(bdp->cbd_bufaddr);
+
+	/* 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);
+
+	if (skb == NULL) {
+		printk("%s: Memory squeeze, dropping packet.\n", dev->name);
+		fep->stats.rx_dropped++;
+	} else {
+		skb->dev = dev;
+		skb_put(skb,pkt_len-4);	/* Make room */
+		eth_copy_and_sum(skb,
+				 (unsigned char *)__va(bdp->cbd_bufaddr),
+				 pkt_len-4, 0);
+		skb->protocol=eth_type_trans(skb,dev);
+		netif_rx(skb);
+	}
+  rx_processing_done:
+
+	/* Clear the status flags for this buffer.
+	*/
+	bdp->cbd_sc &= ~BD_ENET_RX_STATS;
+
+	/* Mark the buffer empty.
+	*/
+	bdp->cbd_sc |= BD_ENET_RX_EMPTY;
+
+	/* Update BD pointer to next entry.
+	*/
+	if (bdp->cbd_sc & BD_ENET_RX_WRAP)
+		bdp = fep->rx_bd_base;
+	else
+		bdp++;
+	
+#if 1
+	/* 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.
+	 */
+	fecp->fec_r_des_active = 0x01000000;
+#endif
+   } /* while (!(bdp->cbd_sc & BD_ENET_RX_EMPTY)) */
+	fep->cur_rx = (cbd_t *)bdp;
+
+#if 0
+	/* Doing this here will allow us to process all frames in the
+	 * ring before the FEC is allowed to put more there.  On a heavily
+	 * loaded network, some frames may be lost.  Unfortunately, this
+	 * increases the interrupt overhead since we can potentially work
+	 * our way back to the interrupt return only to come right back
+	 * here.
+	 */
+	fecp->fec_r_des_active = 0x01000000;
+#endif
+}
+
+
+static void
+fec_enet_mii(struct net_device *dev)
+{
+	struct	fec_enet_private *fep;
+	volatile fec_t	*ep;
+	mii_list_t	*mip;
+	uint		mii_reg;
+
+	fep = netdev_priv(dev);
+	ep = fep->hwp;
+	mii_reg = ep->fec_mii_data;
+	
+	if ((mip = mii_head) == NULL) {
+		printk("MII and no head!\n");
+		return;
+	}
+
+	if (mip->mii_func != NULL)
+		(*(mip->mii_func))(mii_reg, dev);
+
+	mii_head = mip->mii_next;
+	mip->mii_next = mii_free;
+	mii_free = mip;
+
+	if ((mip = mii_head) != NULL)
+		ep->fec_mii_data = mip->mii_regval;
+}
+
+static int
+mii_queue(struct net_device *dev, int regval, void (*func)(uint, struct net_device *))
+{
+	struct fec_enet_private *fep;
+	unsigned long	flags;
+	mii_list_t	*mip;
+	int		retval;
+
+	/* Add PHY address to register command.
+	*/
+	fep = netdev_priv(dev);
+	regval |= fep->phy_addr << 23;
+
+	retval = 0;
+
+	save_flags(flags);
+	cli();
+
+	if ((mip = mii_free) != NULL) {
+		mii_free = mip->mii_next;
+		mip->mii_regval = regval;
+		mip->mii_func = func;
+		mip->mii_next = NULL;
+		if (mii_head) {
+			mii_tail->mii_next = mip;
+			mii_tail = mip;
+		}
+		else {
+			mii_head = mii_tail = mip;
+			fep->hwp->fec_mii_data = regval;
+		}
+	}
+	else {
+		retval = 1;
+	}
+
+	restore_flags(flags);
+
+	return(retval);
+}
+
+static void mii_do_cmd(struct net_device *dev, const phy_cmd_t *c)
+{
+	int k;
+
+	if(!c)
+		return;
+
+	for(k = 0; (c+k)->mii_data != mk_mii_end; k++) {
+		mii_queue(dev, (c+k)->mii_data, (c+k)->funct);
+	}
+}
+
+static void mii_parse_sr(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_STAT_LINK | PHY_STAT_FAULT | PHY_STAT_ANC);
+
+	if (mii_reg & 0x0004)
+		*s |= PHY_STAT_LINK;
+	if (mii_reg & 0x0010)
+		*s |= PHY_STAT_FAULT;
+	if (mii_reg & 0x0020)
+		*s |= PHY_STAT_ANC;
+}
+
+static void mii_parse_cr(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_CONF_ANE | PHY_CONF_LOOP);
+
+	if (mii_reg & 0x1000)
+		*s |= PHY_CONF_ANE;
+	if (mii_reg & 0x4000)
+		*s |= PHY_CONF_LOOP;
+}
+
+static void mii_parse_anar(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_CONF_SPMASK);
+
+	if (mii_reg & 0x0020)
+		*s |= PHY_CONF_10HDX;
+	if (mii_reg & 0x0040)
+		*s |= PHY_CONF_10FDX;
+	if (mii_reg & 0x0080)
+		*s |= PHY_CONF_100HDX;
+	if (mii_reg & 0x00100)
+		*s |= PHY_CONF_100FDX;
+}
+
+/* ------------------------------------------------------------------------- */
+/* The Level one LXT970 is used by many boards				     */
+
+#define MII_LXT970_MIRROR    16  /* Mirror register           */
+#define MII_LXT970_IER       17  /* Interrupt Enable Register */
+#define MII_LXT970_ISR       18  /* Interrupt Status Register */
+#define MII_LXT970_CONFIG    19  /* Configuration Register    */
+#define MII_LXT970_CSR       20  /* Chip Status Register      */
+
+static void mii_parse_lxt970_csr(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_STAT_SPMASK);
+
+	if (mii_reg & 0x0800) {
+		if (mii_reg & 0x1000)
+			*s |= PHY_STAT_100FDX;
+		else
+			*s |= PHY_STAT_100HDX;
+	} else {
+		if (mii_reg & 0x1000)
+			*s |= PHY_STAT_10FDX;
+		else
+			*s |= PHY_STAT_10HDX;
+	}
+}
+
+static phy_info_t phy_info_lxt970 = {
+	0x07810000, 
+	"LXT970",
+
+	(const phy_cmd_t []) {  /* config */
+		{ mk_mii_read(MII_REG_CR), mii_parse_cr },
+		{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* startup - enable interrupts */
+		{ mk_mii_write(MII_LXT970_IER, 0x0002), NULL },
+		{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* ack_int */
+		/* read SR and ISR to acknowledge */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr },
+		{ mk_mii_read(MII_LXT970_ISR), NULL },
+
+		/* find out the current status */
+		{ mk_mii_read(MII_LXT970_CSR), mii_parse_lxt970_csr },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* shutdown - disable interrupts */
+		{ mk_mii_write(MII_LXT970_IER, 0x0000), NULL },
+		{ mk_mii_end, }
+	},
+};
+	
+/* ------------------------------------------------------------------------- */
+/* The Level one LXT971 is used on some of my custom boards                  */
+
+/* register definitions for the 971 */
+
+#define MII_LXT971_PCR       16  /* Port Control Register     */
+#define MII_LXT971_SR2       17  /* Status Register 2         */
+#define MII_LXT971_IER       18  /* Interrupt Enable Register */
+#define MII_LXT971_ISR       19  /* Interrupt Status Register */
+#define MII_LXT971_LCR       20  /* LED Control Register      */
+#define MII_LXT971_TCR       30  /* Transmit Control Register */
+
+/* 
+ * I had some nice ideas of running the MDIO faster...
+ * The 971 should support 8MHz and I tried it, but things acted really
+ * weird, so 2.5 MHz ought to be enough for anyone...
+ */
+
+static void mii_parse_lxt971_sr2(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_STAT_SPMASK | PHY_STAT_LINK | PHY_STAT_ANC);
+
+	if (mii_reg & 0x0400) {
+		fep->link = 1;
+		*s |= PHY_STAT_LINK;
+	} else {
+		fep->link = 0;
+	}
+	if (mii_reg & 0x0080)
+		*s |= PHY_STAT_ANC;
+	if (mii_reg & 0x4000) {
+		if (mii_reg & 0x0200)
+			*s |= PHY_STAT_100FDX;
+		else
+			*s |= PHY_STAT_100HDX;
+	} else {
+		if (mii_reg & 0x0200)
+			*s |= PHY_STAT_10FDX;
+		else
+			*s |= PHY_STAT_10HDX;
+	}
+	if (mii_reg & 0x0008)
+		*s |= PHY_STAT_FAULT;
+}
+
+static phy_info_t phy_info_lxt971 = {
+	0x0001378e, 
+	"LXT971",
+	
+	(const phy_cmd_t []) {  /* config */  
+		/* limit to 10MBit because my protorype board 
+		 * doesn't work with 100. */
+		{ mk_mii_read(MII_REG_CR), mii_parse_cr },
+		{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
+		{ mk_mii_read(MII_LXT971_SR2), mii_parse_lxt971_sr2 },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* startup - enable interrupts */
+		{ mk_mii_write(MII_LXT971_IER, 0x00f2), NULL },
+		{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
+		{ mk_mii_write(MII_LXT971_LCR, 0xd422), NULL }, /* LED config */
+		/* Somehow does the 971 tell me that the link is down
+		 * the first read after power-up.
+		 * read here to get a valid value in ack_int */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr }, 
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* ack_int */
+		/* find out the current status */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr },
+		{ mk_mii_read(MII_LXT971_SR2), mii_parse_lxt971_sr2 },
+		/* we only need to read ISR to acknowledge */
+		{ mk_mii_read(MII_LXT971_ISR), NULL },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* shutdown - disable interrupts */
+		{ mk_mii_write(MII_LXT971_IER, 0x0000), NULL },
+		{ mk_mii_end, }
+	},
+};
+
+/* ------------------------------------------------------------------------- */
+/* The Quality Semiconductor QS6612 is used on the RPX CLLF                  */
+
+/* register definitions */
+
+#define MII_QS6612_MCR       17  /* Mode Control Register      */
+#define MII_QS6612_FTR       27  /* Factory Test Register      */
+#define MII_QS6612_MCO       28  /* Misc. Control Register     */
+#define MII_QS6612_ISR       29  /* Interrupt Source Register  */
+#define MII_QS6612_IMR       30  /* Interrupt Mask Register    */
+#define MII_QS6612_PCR       31  /* 100BaseTx PHY Control Reg. */
+
+static void mii_parse_qs6612_pcr(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_STAT_SPMASK);
+
+	switch((mii_reg >> 2) & 7) {
+	case 1: *s |= PHY_STAT_10HDX; break;
+	case 2: *s |= PHY_STAT_100HDX; break;
+	case 5: *s |= PHY_STAT_10FDX; break;
+	case 6: *s |= PHY_STAT_100FDX; break;
+	}
+}
+
+static phy_info_t phy_info_qs6612 = {
+	0x00181440, 
+	"QS6612",
+	
+	(const phy_cmd_t []) {  /* config */  
+		/* The PHY powers up isolated on the RPX, 
+		 * so send a command to allow operation.
+		 */
+		{ mk_mii_write(MII_QS6612_PCR, 0x0dc0), NULL },
+
+		/* parse cr and anar to get some info */
+		{ mk_mii_read(MII_REG_CR), mii_parse_cr },
+		{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* startup - enable interrupts */
+		{ mk_mii_write(MII_QS6612_IMR, 0x003a), NULL },
+		{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* ack_int */
+		/* we need to read ISR, SR and ANER to acknowledge */
+		{ mk_mii_read(MII_QS6612_ISR), NULL },
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr },
+		{ mk_mii_read(MII_REG_ANER), NULL },
+
+		/* read pcr to get info */
+		{ mk_mii_read(MII_QS6612_PCR), mii_parse_qs6612_pcr },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* shutdown - disable interrupts */
+		{ mk_mii_write(MII_QS6612_IMR, 0x0000), NULL },
+		{ mk_mii_end, }
+	},
+};
+
+/* ------------------------------------------------------------------------- */
+/* AMD AM79C874 phy                                                          */
+
+/* register definitions for the 874 */
+
+#define MII_AM79C874_MFR       16  /* Miscellaneous Feature Register */
+#define MII_AM79C874_ICSR      17  /* Interrupt/Status Register      */
+#define MII_AM79C874_DR        18  /* Diagnostic Register            */
+#define MII_AM79C874_PMLR      19  /* Power and Loopback Register    */
+#define MII_AM79C874_MCR       21  /* ModeControl Register           */
+#define MII_AM79C874_DC        23  /* Disconnect Counter             */
+#define MII_AM79C874_REC       24  /* Recieve Error Counter          */
+
+static void mii_parse_am79c874_dr(uint mii_reg, struct net_device *dev)
+{
+	struct fec_enet_private *fep = netdev_priv(dev);
+	volatile uint *s = &(fep->phy_status);
+
+	*s &= ~(PHY_STAT_SPMASK | PHY_STAT_ANC);
+
+	if (mii_reg & 0x0080)
+		*s |= PHY_STAT_ANC;
+	if (mii_reg & 0x0400)
+		*s |= ((mii_reg & 0x0800) ? PHY_STAT_100FDX : PHY_STAT_100HDX);
+	else
+		*s |= ((mii_reg & 0x0800) ? PHY_STAT_10FDX : PHY_STAT_10HDX);
+}
+
+static phy_info_t phy_info_am79c874 = {
+	0x00022561, 
+	"AM79C874",
+	
+	(const phy_cmd_t []) {  /* config */  
+		/* limit to 10MBit because my protorype board 
+		 * doesn't work with 100. */
+		{ mk_mii_read(MII_REG_CR), mii_parse_cr },
+		{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
+		{ mk_mii_read(MII_AM79C874_DR), mii_parse_am79c874_dr },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* startup - enable interrupts */
+		{ mk_mii_write(MII_AM79C874_ICSR, 0xff00), NULL },
+		{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr }, 
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* ack_int */
+		/* find out the current status */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr },
+		{ mk_mii_read(MII_AM79C874_DR), mii_parse_am79c874_dr },
+		/* we only need to read ISR to acknowledge */
+		{ mk_mii_read(MII_AM79C874_ICSR), NULL },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* shutdown - disable interrupts */
+		{ mk_mii_write(MII_AM79C874_ICSR, 0x0000), NULL },
+		{ mk_mii_end, }
+	},
+};
+
+/* ------------------------------------------------------------------------- */
+/* Kendin KS8721BL phy                                                       */
+
+/* register definitions for the 8721 */
+
+#define MII_KS8721BL_RXERCR	21
+#define MII_KS8721BL_ICSR	22
+#define	MII_KS8721BL_PHYCR	31
+
+static phy_info_t phy_info_ks8721bl = {
+	0x00022161, 
+	"KS8721BL",
+	
+	(const phy_cmd_t []) {  /* config */  
+		{ mk_mii_read(MII_REG_CR), mii_parse_cr },
+		{ mk_mii_read(MII_REG_ANAR), mii_parse_anar },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* startup */
+		{ mk_mii_write(MII_KS8721BL_ICSR, 0xff00), NULL },
+		{ mk_mii_write(MII_REG_CR, 0x1200), NULL }, /* autonegotiate */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr }, 
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) { /* ack_int */
+		/* find out the current status */
+		{ mk_mii_read(MII_REG_SR), mii_parse_sr },
+		/* we only need to read ISR to acknowledge */
+		{ mk_mii_read(MII_KS8721BL_ICSR), NULL },
+		{ mk_mii_end, }
+	},
+	(const phy_cmd_t []) {  /* shutdown */
+		{ mk_mii_write(MII_KS8721BL_ICSR, 0x0000), NULL },
+		{ mk_mii_end, }
+	},
+};
+
+/* ------------------------------------------------------------------------- */
+
+static phy_info_t *phy_info[] = {
+	&phy_info_lxt970,
+	&phy_info_lxt971,
+	&phy_info_qs6612,
+	&phy_info_am79c874,
+	&phy_info_ks8721bl,
+	NULL
+};
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_RPXCLASSIC
+static void
+mii_link_interrupt(void *dev_id);
+#else
+static irqreturn_t
+mii_link_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+#endif
+
+#if defined(CONFIG_M5272)
+
+/*
+ *	Code specific to Coldfire 5272 setup.