patch-2.4.26 linux-2.4.26/arch/ppc/8260_io/enet.c

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diff -urN linux-2.4.25/arch/ppc/8260_io/enet.c linux-2.4.26/arch/ppc/8260_io/enet.c
@@ -1,857 +0,0 @@
-/*
- * Ethernet driver for Motorola MPC8260.
- * Copyright (c) 1999 Dan Malek (dmalek@jlc.net)
- * Copyright (c) 2000 MontaVista Software Inc. (source@mvista.com)
- *	2.3.99 Updates
- *
- * I copied this from the 8xx CPM Ethernet driver, so follow the
- * credits back through that.
- *
- * This version of the driver is somewhat selectable for the different
- * processor/board combinations.  It works for the boards I know about
- * now, and should be easily modified to include others.  Some of the
- * configuration information is contained in <asm/commproc.h> and the
- * remainder is here.
- *
- * Buffer descriptors are kept in the CPM dual port RAM, and the frame
- * buffers are in the host memory.
- *
- * 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.
- *
- */
-#include <linux/kernel.h>
-#include <linux/sched.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 <asm/immap_8260.h>
-#include <asm/pgtable.h>
-#include <asm/mpc8260.h>
-#include <asm/bitops.h>
-#include <asm/uaccess.h>
-#include <asm/cpm_8260.h>
-#include <asm/irq.h>
-
-/*
- *				Theory of Operation
- *
- * The MPC8260 CPM performs the Ethernet processing on an SCC.  It can use
- * an aribtrary number of buffers on byte boundaries, but must have at
- * least two receive buffers to prevent constant overrun conditions.
- *
- * The buffer descriptors are allocated from the CPM dual port memory
- * with the data buffers allocated from host memory, just like all other
- * serial communication protocols.  The host memory buffers are allocated
- * from the free page pool, and then divided into smaller receive and
- * transmit buffers.  The size of the buffers should be a power of two,
- * since that nicely divides the page.  This creates a ring buffer
- * structure similar to the LANCE and other controllers.
- *
- * Like the LANCE driver:
- * The driver runs as two independent, single-threaded flows of control.  One
- * is the send-packet routine, which enforces single-threaded use by the
- * cep->tx_busy flag.  The other thread is the interrupt handler, which is
- * single threaded by the hardware and other software.
- */
-
-/* The transmitter timeout
- */
-#define TX_TIMEOUT	(2*HZ)
-
-/* 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 is best
- * to keep them that size.
- * We don't need to allocate pages for the transmitter.  We just use
- * the skbuffer directly.
- */
-#define CPM_ENET_RX_PAGES	4
-#define CPM_ENET_RX_FRSIZE	2048
-#define CPM_ENET_RX_FRPPG	(PAGE_SIZE / CPM_ENET_RX_FRSIZE)
-#define RX_RING_SIZE		(CPM_ENET_RX_FRPPG * CPM_ENET_RX_PAGES)
-#define TX_RING_SIZE		8	/* Must be power of two */
-#define TX_RING_MOD_MASK	7	/*   for this to work */
-
-/* The CPM 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 CPM 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 scc_enet_private {
-	/* The saved address of a sent-in-place packet/buffer, for skfree(). */
-	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. */
-	scc_t	*sccp;
-	struct	net_device_stats stats;
-	uint	tx_free;
-	spinlock_t lock;
-};
-
-static int scc_enet_open(struct net_device *dev);
-static int scc_enet_start_xmit(struct sk_buff *skb, struct net_device *dev);
-static int scc_enet_rx(struct net_device *dev);
-static void scc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs);
-static int scc_enet_close(struct net_device *dev);
-static struct net_device_stats *scc_enet_get_stats(struct net_device *dev);
-static void set_multicast_list(struct net_device *dev);
-
-/* These will be configurable for the SCC choice.
-*/
-#define CPM_ENET_BLOCK	CPM_CR_SCC1_SBLOCK
-#define CPM_ENET_PAGE	CPM_CR_SCC1_PAGE
-#define PROFF_ENET	PROFF_SCC1
-#define SCC_ENET	0
-#define SIU_INT_ENET	SIU_INT_SCC1
-
-/* These are both board and SCC dependent....
-*/
-#define PD_ENET_RXD	((uint)0x00000001)
-#define PD_ENET_TXD	((uint)0x00000002)
-#define PD_ENET_TENA	((uint)0x00000004)
-#define PC_ENET_RENA	((uint)0x00020000)
-#define PC_ENET_CLSN	((uint)0x00000004)
-#define PC_ENET_TXCLK	((uint)0x00000800)
-#define PC_ENET_RXCLK	((uint)0x00000400)
-#define CMX_CLK_ROUTE	((uint)0x25000000)
-#define CMX_CLK_MASK	((uint)0xff000000)
-
-/* Specific to a board.
-*/
-#define PC_EST8260_ENET_LOOPBACK	((uint)0x80000000)
-#define PC_EST8260_ENET_SQE		((uint)0x40000000)
-#define PC_EST8260_ENET_NOTFD		((uint)0x20000000)
-
-static int
-scc_enet_open(struct net_device *dev)
-{
-
-	/* I should reset the ring buffers here, but I don't yet know
-	 * a simple way to do that.
-	 */
-	netif_start_queue(dev);
-	return 0;					/* Always succeed */
-}
-
-static int
-scc_enet_start_xmit(struct sk_buff *skb, struct net_device *dev)
-{
-	struct scc_enet_private *cep = (struct scc_enet_private *)dev->priv;
-	volatile cbd_t	*bdp;
-
-
-	/* Fill in a Tx ring entry */
-	bdp = cep->cur_tx;
-
-#ifndef final_version
-	if (!cep->tx_free || (bdp->cbd_sc & BD_ENET_TX_READY)) {
-		/* Ooops.  All transmit buffers are full.  Bail out.
-		 * This should not happen, since the tx queue should be stopped.
-		 */
-		printk("%s: tx queue full!.\n", dev->name);
-		return 1;
-	}
-#endif
-
-	/* Clear all of the status flags.
-	 */
-	bdp->cbd_sc &= ~BD_ENET_TX_STATS;
-
-	/* If the frame is short, tell CPM to pad it.
-	*/
-	if (skb->len <= ETH_ZLEN)
-		bdp->cbd_sc |= BD_ENET_TX_PAD;
-	else
-		bdp->cbd_sc &= ~BD_ENET_TX_PAD;
-
-	/* Set buffer length and buffer pointer.
-	*/
-	bdp->cbd_datlen = skb->len;
-	bdp->cbd_bufaddr = __pa(skb->data);
-
-	/* Save skb pointer.
-	*/
-	cep->tx_skbuff[cep->skb_cur] = skb;
-
-	cep->stats.tx_bytes += skb->len;
-	cep->skb_cur = (cep->skb_cur+1) & TX_RING_MOD_MASK;
-
-	spin_lock_irq(&cep->lock);
-
-	/* Send it on its way.  Tell CPM 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;
-
-	/* If this was the last BD in the ring, start at the beginning again.
-	*/
-	if (bdp->cbd_sc & BD_ENET_TX_WRAP)
-		bdp = cep->tx_bd_base;
-	else
-		bdp++;
-
-	if (!--cep->tx_free)
-		netif_stop_queue(dev);
-
-	cep->cur_tx = (cbd_t *)bdp;
-
-	spin_unlock_irq(&cep->lock);
-
-	return 0;
-}
-
-static void
-scc_enet_timeout(struct net_device *dev)
-{
-	struct scc_enet_private *cep = (struct scc_enet_private *)dev->priv;
-
-	printk("%s: transmit timed out.\n", dev->name);
-	cep->stats.tx_errors++;
-#ifndef final_version
-	{
-		int	i;
-		cbd_t	*bdp;
-		printk(" Ring data dump: cur_tx %p tx_free %d cur_rx %p.\n",
-		       cep->cur_tx, cep->tx_free,
-		       cep->cur_rx);
-		bdp = cep->tx_bd_base;
-		printk(" Tx @base %p :\n", bdp);
-		for (i = 0 ; i < TX_RING_SIZE; i++, bdp++)
-			printk("%04x %04x %08x\n",
-			       bdp->cbd_sc,
-			       bdp->cbd_datlen,
-			       bdp->cbd_bufaddr);
-		bdp = cep->rx_bd_base;
-		printk(" Rx @base %p :\n", bdp);
-		for (i = 0 ; i < RX_RING_SIZE; i++, bdp++)
-			printk("%04x %04x %08x\n",
-			       bdp->cbd_sc,
-			       bdp->cbd_datlen,
-			       bdp->cbd_bufaddr);
-	}
-#endif
-	if (cep->tx_free)
-		netif_wake_queue(dev);
-}
-
-/* The interrupt handler.
- * This is called from the CPM handler, not the MPC core interrupt.
- */
-static void
-scc_enet_interrupt(int irq, void * dev_id, struct pt_regs * regs)
-{
-	struct	net_device *dev = dev_id;
-	volatile struct	scc_enet_private *cep;
-	volatile cbd_t	*bdp;
-	ushort	int_events;
-	int	must_restart;
-
-	cep = (struct scc_enet_private *)dev->priv;
-
-	/* Get the interrupt events that caused us to be here.
-	*/
-	int_events = cep->sccp->scc_scce;
-	cep->sccp->scc_scce = int_events;
-	must_restart = 0;
-
-	/* Handle receive event in its own function.
-	*/
-	if (int_events & SCCE_ENET_RXF)
-		scc_enet_rx(dev_id);
-
-	/* Check for a transmit error.  The manual is a little unclear
-	 * about this, so the debug code until I get it figured out.  It
-	 * appears that if TXE is set, then TXB is not set.  However,
-	 * if carrier sense is lost during frame transmission, the TXE
-	 * bit is set, "and continues the buffer transmission normally."
-	 * I don't know if "normally" implies TXB is set when the buffer
-	 * descriptor is closed.....trial and error :-).
-	 */
-
-	/* Transmit OK, or non-fatal error.  Update the buffer descriptors.
-	*/
-	if (int_events & (SCCE_ENET_TXE | SCCE_ENET_TXB)) {
-	    spin_lock(&cep->lock);
-	    bdp = cep->dirty_tx;
-	    while ((bdp->cbd_sc&BD_ENET_TX_READY)==0) {
-		if (cep->tx_free == TX_RING_SIZE)
-		    break;
-
-		if (bdp->cbd_sc & BD_ENET_TX_HB)	/* No heartbeat */
-			cep->stats.tx_heartbeat_errors++;
-		if (bdp->cbd_sc & BD_ENET_TX_LC)	/* Late collision */
-			cep->stats.tx_window_errors++;
-		if (bdp->cbd_sc & BD_ENET_TX_RL)	/* Retrans limit */
-			cep->stats.tx_aborted_errors++;
-		if (bdp->cbd_sc & BD_ENET_TX_UN)	/* Underrun */
-			cep->stats.tx_fifo_errors++;
-		if (bdp->cbd_sc & BD_ENET_TX_CSL)	/* Carrier lost */
-			cep->stats.tx_carrier_errors++;
-
-
-		/* No heartbeat or Lost carrier are not really bad errors.
-		 * The others require a restart transmit command.
-		 */
-		if (bdp->cbd_sc &
-		    (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
-			must_restart = 1;
-			cep->stats.tx_errors++;
-		}
-
-		cep->stats.tx_packets++;
-
-		/* Deferred means some collisions occurred during transmit,
-		 * but we eventually sent the packet OK.
-		 */
-		if (bdp->cbd_sc & BD_ENET_TX_DEF)
-			cep->stats.collisions++;
-
-		/* Free the sk buffer associated with this last transmit.
-		*/
-		dev_kfree_skb_irq(cep->tx_skbuff[cep->skb_dirty]);
-		cep->skb_dirty = (cep->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 = cep->tx_bd_base;
-		else
-			bdp++;
-
-		/* I don't know if we can be held off from processing these
-		 * interrupts for more than one frame time.  I really hope
-		 * not.  In such a case, we would now want to check the
-		 * currently available BD (cur_tx) and determine if any
-		 * buffers between the dirty_tx and cur_tx have also been
-		 * sent.  We would want to process anything in between that
-		 * does not have BD_ENET_TX_READY set.
-		 */
-
-		/* Since we have freed up a buffer, the ring is no longer
-		 * full.
-		 */
-		if (!cep->tx_free++) {
-			if (netif_queue_stopped(dev)) {
-				netif_wake_queue(dev);
-			}
-		}
-
-		cep->dirty_tx = (cbd_t *)bdp;
-	    }
-
-	    if (must_restart) {
-		volatile cpm8260_t *cp;
-
-		/* Some transmit errors cause the transmitter to shut
-		 * down.  We now issue a restart transmit.  Since the
-		 * errors close the BD and update the pointers, the restart
-		 * _should_ pick up without having to reset any of our
-		 * pointers either.
-		 */
-
-		cp = cpmp;
-		cp->cp_cpcr =
-		    mk_cr_cmd(CPM_ENET_PAGE, CPM_ENET_BLOCK, 0,
-		    			CPM_CR_RESTART_TX) | CPM_CR_FLG;
-		while (cp->cp_cpcr & CPM_CR_FLG);
-	    }
-	    spin_unlock(&cep->lock);
-	}
-
-	/* Check for receive busy, i.e. packets coming but no place to
-	 * put them.
-	 */
-	if (int_events & SCCE_ENET_BSY)
-		cep->stats.rx_dropped++;
-
-	return;
-}
-
-/* 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 int
-scc_enet_rx(struct net_device *dev)
-{
-	struct	scc_enet_private *cep;
-	volatile cbd_t	*bdp;
-	struct	sk_buff *skb;
-	ushort	pkt_len;
-
-	cep = (struct scc_enet_private *)dev->priv;
-
-	/* First, grab all of the stats for the incoming packet.
-	 * These get messed up if we get called due to a busy condition.
-	 */
-	bdp = cep->cur_rx;
-
-for (;;) {
-	if (bdp->cbd_sc & BD_ENET_RX_EMPTY)
-		break;
-
-#ifndef final_version
-	/* Since we have allocated space to hold a complete frame, both
-	 * the first and last indicators should be set.
-	 */
-	if ((bdp->cbd_sc & (BD_ENET_RX_FIRST | BD_ENET_RX_LAST)) !=
-		(BD_ENET_RX_FIRST | BD_ENET_RX_LAST))
-			printk("CPM ENET: rcv is not first+last\n");
-#endif
-
-	/* Frame too long or too short.
-	*/
-	if (bdp->cbd_sc & (BD_ENET_RX_LG | BD_ENET_RX_SH))
-		cep->stats.rx_length_errors++;
-	if (bdp->cbd_sc & BD_ENET_RX_NO)	/* Frame alignment */
-		cep->stats.rx_frame_errors++;
-	if (bdp->cbd_sc & BD_ENET_RX_CR)	/* CRC Error */
-		cep->stats.rx_crc_errors++;
-	if (bdp->cbd_sc & BD_ENET_RX_OV)	/* FIFO overrun */
-		cep->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) {
-		cep->stats.rx_frame_errors++;
-	}
-	else {
-
-		/* Process the incoming frame.
-		*/
-		cep->stats.rx_packets++;
-		pkt_len = bdp->cbd_datlen;
-		cep->stats.rx_bytes += pkt_len;
-
-		/* This does 16 byte alignment, much more than 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);
-			cep->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);
-		}
-	}
-
-	/* 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 = cep->rx_bd_base;
-	else
-		bdp++;
-
-   }
-	cep->cur_rx = (cbd_t *)bdp;
-
-	return 0;
-}
-
-static int
-scc_enet_close(struct net_device *dev)
-{
-	/* Don't know what to do yet.
-	*/
-	netif_stop_queue(dev);
-
-	return 0;
-}
-
-static struct net_device_stats *scc_enet_get_stats(struct net_device *dev)
-{
-	struct scc_enet_private *cep = (struct scc_enet_private *)dev->priv;
-
-	return &cep->stats;
-}
-
-/* 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?).
- */
-
-static void set_multicast_list(struct net_device *dev)
-{
-	struct	scc_enet_private *cep;
-	struct	dev_mc_list *dmi;
-	u_char	*mcptr, *tdptr;
-	volatile scc_enet_t *ep;
-	int	i, j;
-	cep = (struct scc_enet_private *)dev->priv;
-
-	/* Get pointer to SCC area in parameter RAM.
-	*/
-	ep = (scc_enet_t *)dev->base_addr;
-
-	if (dev->flags&IFF_PROMISC) {
-
-		/* Log any net taps. */
-		printk("%s: Promiscuous mode enabled.\n", dev->name);
-		cep->sccp->scc_pmsr |= SCC_PSMR_PRO;
-	} else {
-
-		cep->sccp->scc_pmsr &= ~SCC_PSMR_PRO;
-
-		if (dev->flags & IFF_ALLMULTI) {
-			/* Catch all multicast addresses, so set the
-			 * filter to all 1's.
-			 */
-			ep->sen_gaddr1 = 0xffff;
-			ep->sen_gaddr2 = 0xffff;
-			ep->sen_gaddr3 = 0xffff;
-			ep->sen_gaddr4 = 0xffff;
-		}
-		else {
-			/* Clear filter and add the addresses in the list.
-			*/
-			ep->sen_gaddr1 = 0;
-			ep->sen_gaddr2 = 0;
-			ep->sen_gaddr3 = 0;
-			ep->sen_gaddr4 = 0;
-
-			dmi = dev->mc_list;
-
-			for (i=0; i<dev->mc_count; i++, dmi = dmi->next) {
-
-				/* Only support group multicast for now.
-				*/
-				if (!(dmi->dmi_addr[0] & 1))
-					continue;
-
-				/* The address in dmi_addr is LSB first,
-				 * and taddr is MSB first.  We have to
-				 * copy bytes MSB first from dmi_addr.
-				 */
-				mcptr = (u_char *)dmi->dmi_addr + 5;
-				tdptr = (u_char *)&ep->sen_taddrh;
-				for (j=0; j<6; j++)
-					*tdptr++ = *mcptr--;
-
-				/* Ask CPM to run CRC and set bit in
-				 * filter mask.
-				 */
-				cpmp->cp_cpcr = mk_cr_cmd(CPM_ENET_PAGE,
-						CPM_ENET_BLOCK, 0,
-						CPM_CR_SET_GADDR) | CPM_CR_FLG;
-				/* this delay is necessary here -- Cort */
-				udelay(10);
-				while (cpmp->cp_cpcr & CPM_CR_FLG);
-			}
-		}
-	}
-}
-
-/* Initialize the CPM Ethernet on SCC.
- */
-int __init scc_enet_init(void)
-{
-	struct net_device *dev;
-	struct scc_enet_private *cep;
-	int i, j;
-	unsigned char	*eap;
-	unsigned long	mem_addr;
-	bd_t		*bd;
-	volatile	cbd_t		*bdp;
-	volatile	cpm8260_t	*cp;
-	volatile	scc_t		*sccp;
-	volatile	scc_enet_t	*ep;
-	volatile	immap_t		*immap;
-	volatile	iop8260_t	*io;
-
-	cp = cpmp;	/* Get pointer to Communication Processor */
-
-	immap = (immap_t *)IMAP_ADDR;	/* and to internal registers */
-	io = &immap->im_ioport;
-
-	bd = (bd_t *)__res;
-
-	/* Allocate some private information.
-	*/
-	cep = (struct scc_enet_private *)kmalloc(sizeof(*cep), GFP_KERNEL);
-	if (cep == NULL)
-		return -ENOMEM;
-
-	__clear_user(cep,sizeof(*cep));
-	spin_lock_init(&cep->lock);
-
-	/* Create an Ethernet device instance.
-	*/
-	dev = init_etherdev(0, 0);
-
-	/* Get pointer to SCC area in parameter RAM.
-	*/
-	ep = (scc_enet_t *)(&immap->im_dprambase[PROFF_ENET]);
-
-	/* And another to the SCC register area.
-	*/
-	sccp = (volatile scc_t *)(&immap->im_scc[SCC_ENET]);
-	cep->sccp = (scc_t *)sccp;		/* Keep the pointer handy */
-
-	/* Disable receive and transmit in case someone left it running.
-	*/
-	sccp->scc_gsmrl &= ~(SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
-	/* Configure port C and D pins for SCC Ethernet.  This
-	 * won't work for all SCC possibilities....it will be
-	 * board/port specific.
-	 */
-	io->iop_pparc |=
-		(PC_ENET_RENA | PC_ENET_CLSN | PC_ENET_TXCLK | PC_ENET_RXCLK);
-	io->iop_pdirc &=
-		~(PC_ENET_RENA | PC_ENET_CLSN | PC_ENET_TXCLK | PC_ENET_RXCLK);
-	io->iop_psorc &=
-		~(PC_ENET_RENA | PC_ENET_TXCLK | PC_ENET_RXCLK);
-	io->iop_psorc |= PC_ENET_CLSN;
-
-	io->iop_ppard |= (PD_ENET_RXD | PD_ENET_TXD | PD_ENET_TENA);
-	io->iop_pdird |= (PD_ENET_TXD | PD_ENET_TENA);
-	io->iop_pdird &= ~PD_ENET_RXD;
-	io->iop_psord |= PD_ENET_TXD;
-	io->iop_psord &= ~(PD_ENET_RXD | PD_ENET_TENA);
-
-	/* Configure Serial Interface clock routing.
-	 * First, clear all SCC bits to zero, then set the ones we want.
-	 */
-	immap->im_cpmux.cmx_scr &= ~CMX_CLK_MASK;
-	immap->im_cpmux.cmx_scr |= CMX_CLK_ROUTE;
-
-	/* Allocate space for the buffer descriptors in the DP ram.
-	 * These are relative offsets in the DP ram address space.
-	 * Initialize base addresses for the buffer descriptors.
-	 */
-	i = m8260_cpm_dpalloc(sizeof(cbd_t) * RX_RING_SIZE, 8);
-	ep->sen_genscc.scc_rbase = i;
-	cep->rx_bd_base = (cbd_t *)&immap->im_dprambase[i];
-
-	i = m8260_cpm_dpalloc(sizeof(cbd_t) * TX_RING_SIZE, 8);
-	ep->sen_genscc.scc_tbase = i;
-	cep->tx_bd_base = (cbd_t *)&immap->im_dprambase[i];
-
-	cep->dirty_tx = cep->cur_tx = cep->tx_bd_base;
-	cep->tx_free = TX_RING_SIZE;
-	cep->cur_rx = cep->rx_bd_base;
-
-	ep->sen_genscc.scc_rfcr = CPMFCR_GBL | CPMFCR_EB;
-	ep->sen_genscc.scc_tfcr = CPMFCR_GBL | CPMFCR_EB;
-
-	/* Set maximum bytes per receive buffer.
-	 * This appears to be an Ethernet frame size, not the buffer
-	 * fragment size.  It must be a multiple of four.
-	 */
-	ep->sen_genscc.scc_mrblr = PKT_MAXBLR_SIZE;
-
-	/* Set CRC preset and mask.
-	*/
-	ep->sen_cpres = 0xffffffff;
-	ep->sen_cmask = 0xdebb20e3;
-
-	ep->sen_crcec = 0;	/* CRC Error counter */
-	ep->sen_alec = 0;	/* alignment error counter */
-	ep->sen_disfc = 0;	/* discard frame counter */
-
-	ep->sen_pads = 0x8888;	/* Tx short frame pad character */
-	ep->sen_retlim = 15;	/* Retry limit threshold */
-
-	ep->sen_maxflr = PKT_MAXBUF_SIZE;   /* maximum frame length register */
-	ep->sen_minflr = PKT_MINBUF_SIZE;  /* minimum frame length register */
-
-	ep->sen_maxd1 = PKT_MAXBLR_SIZE;	/* maximum DMA1 length */
-	ep->sen_maxd2 = PKT_MAXBLR_SIZE;	/* maximum DMA2 length */
-
-	/* Clear hash tables.
-	*/
-	ep->sen_gaddr1 = 0;
-	ep->sen_gaddr2 = 0;
-	ep->sen_gaddr3 = 0;
-	ep->sen_gaddr4 = 0;
-	ep->sen_iaddr1 = 0;
-	ep->sen_iaddr2 = 0;
-	ep->sen_iaddr3 = 0;
-	ep->sen_iaddr4 = 0;
-
-	/* Set Ethernet station address.
-	 *
-	 * This is supplied in the board information structure, so we
-	 * copy that into the controller.
-	 */
-	eap = (unsigned char *)&(ep->sen_paddrh);
-	for (i=5; i>=0; i--)
-		*eap++ = dev->dev_addr[i] = bd->bi_enetaddr[i];
-
-	ep->sen_pper = 0;	/* 'cause the book says so */
-	ep->sen_taddrl = 0;	/* temp address (LSB) */
-	ep->sen_taddrm = 0;
-	ep->sen_taddrh = 0;	/* temp address (MSB) */
-
-	/* Now allocate the host memory pages and initialize the
-	 * buffer descriptors.
-	 */
-	bdp = cep->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;
-
-	bdp = cep->rx_bd_base;
-	for (i=0; i<CPM_ENET_RX_PAGES; i++) {
-
-		/* Allocate a page.
-		*/
-		mem_addr = __get_free_page(GFP_KERNEL);
-
-		/* Initialize the BD for every fragment in the page.
-		*/
-		for (j=0; j<CPM_ENET_RX_FRPPG; j++) {
-			bdp->cbd_sc = BD_ENET_RX_EMPTY | BD_ENET_RX_INTR;
-			bdp->cbd_bufaddr = __pa(mem_addr);
-			mem_addr += CPM_ENET_RX_FRSIZE;
-			bdp++;
-		}
-	}
-
-	/* Set the last buffer to wrap.
-	*/
-	bdp--;
-	bdp->cbd_sc |= BD_SC_WRAP;
-
-	/* Let's re-initialize the channel now.  We have to do it later
-	 * than the manual describes because we have just now finished
-	 * the BD initialization.
-	 */
-	cpmp->cp_cpcr = mk_cr_cmd(CPM_ENET_PAGE, CPM_ENET_BLOCK, 0,
-			CPM_CR_INIT_TRX) | CPM_CR_FLG;
-	while (cp->cp_cpcr & CPM_CR_FLG);
-
-	cep->skb_cur = cep->skb_dirty = 0;
-
-	sccp->scc_scce = 0xffff;	/* Clear any pending events */
-
-	/* Enable interrupts for transmit error, complete frame
-	 * received, and any transmit buffer we have also set the
-	 * interrupt flag.
-	 */
-	sccp->scc_sccm = (SCCE_ENET_TXE | SCCE_ENET_RXF | SCCE_ENET_TXB);
-
-	/* Install our interrupt handler.
-	*/
-	request_irq(SIU_INT_ENET, scc_enet_interrupt, 0, "enet", dev);
-
-	/* Set GSMR_H to enable all normal operating modes.
-	 * Set GSMR_L to enable Ethernet to MC68160.
-	 */
-	sccp->scc_gsmrh = 0;
-	sccp->scc_gsmrl = (SCC_GSMRL_TCI | SCC_GSMRL_TPL_48 | SCC_GSMRL_TPP_10 | SCC_GSMRL_MODE_ENET);
-
-	/* Set sync/delimiters.
-	*/
-	sccp->scc_dsr = 0xd555;
-
-	/* Set processing mode.  Use Ethernet CRC, catch broadcast, and
-	 * start frame search 22 bit times after RENA.
-	 */
-	sccp->scc_pmsr = (SCC_PSMR_ENCRC | SCC_PSMR_NIB22);
-
-	/* It is now OK to enable the Ethernet transmitter.
-	 * Unfortunately, there are board implementation differences here.
-	 */
-	io->iop_pparc &= ~(PC_EST8260_ENET_LOOPBACK |
-				PC_EST8260_ENET_SQE | PC_EST8260_ENET_NOTFD);
-	io->iop_psorc &= ~(PC_EST8260_ENET_LOOPBACK |
-				PC_EST8260_ENET_SQE | PC_EST8260_ENET_NOTFD);
-	io->iop_pdirc |= (PC_EST8260_ENET_LOOPBACK |
-				PC_EST8260_ENET_SQE | PC_EST8260_ENET_NOTFD);
-	io->iop_pdatc &= ~(PC_EST8260_ENET_LOOPBACK | PC_EST8260_ENET_SQE);
-	io->iop_pdatc |= PC_EST8260_ENET_NOTFD;
-
-	dev->base_addr = (unsigned long)ep;
-	dev->priv = cep;
-
-	/* The CPM Ethernet specific entries in the device structure. */
-	dev->open = scc_enet_open;
-	dev->hard_start_xmit = scc_enet_start_xmit;
-	dev->tx_timeout = scc_enet_timeout;
-	dev->watchdog_timeo = TX_TIMEOUT;
-	dev->stop = scc_enet_close;
-	dev->get_stats = scc_enet_get_stats;
-	dev->set_multicast_list = set_multicast_list;
-
-	/* And last, enable the transmit and receive processing.
-	*/
-	sccp->scc_gsmrl |= (SCC_GSMRL_ENR | SCC_GSMRL_ENT);
-
-	printk("%s: SCC ENET Version 0.1, ", dev->name);
-	for (i=0; i<5; i++)
-		printk("%02x:", dev->dev_addr[i]);
-	printk("%02x\n", dev->dev_addr[5]);
-
-	return 0;
-}
-
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)