patch-2.3.21 linux/drivers/net/wan/sealevel.c

• Lines: 472
• Date: Mon Oct 11 10:13:25 1999
• Orig file: v2.3.20/linux/drivers/net/wan/sealevel.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.20/linux/drivers/net/wan/sealevel.c linux/drivers/net/wan/sealevel.c
@@ -0,0 +1,471 @@
+#define LINUX_21
+
+/*
+ *	Sealevel Systems 4021 driver.
+ *
+ *	This program is free software; you can redistribute it and/or
+ *	modify it under the terms of the GNU General Public License
+ *	as published by the Free Software Foundation; either version
+ *	2 of the License, or (at your option) any later version.
+ *
+ *	(c) Copyright 1999 Building Number Three Ltd
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/net.h>
+#include <linux/skbuff.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/delay.h>
+#include <linux/ioport.h>
+#include <net/arp.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h>
+#include "syncppp.h"
+#include "z85230.h"
+
+
+struct slvl_device
+{
+	struct z8530_channel *chan;
+	struct ppp_device netdev;
+	char name[16];
+	int channel;
+};
+
+
+struct slvl_board
+{
+	struct slvl_device dev[2];
+	struct z8530_dev board;
+	int iobase;
+};
+
+/*
+ *	Network driver support routines
+ */
+
+/*
+ *	Frame receive. Simple for our card as we do sync ppp and there
+ *	is no funny garbage involved
+ */
+ 
+static void sealevel_input(struct z8530_channel *c, struct sk_buff *skb)
+{
+	/* Drop the CRC - its not a good idea to try and negotiate it ;) */
+	skb_trim(skb, skb->len-2);
+	skb->protocol=htons(ETH_P_WAN_PPP);
+	skb->mac.raw=skb->data;
+	skb->dev=c->netdevice;
+	/*
+	 *	Send it to the PPP layer. We dont have time to process
+	 *	it right now.
+	 */
+	netif_rx(skb);
+}
+ 
+/*
+ *	We've been placed in the UP state
+ */ 
+ 
+static int sealevel_open(struct net_device *d)
+{
+	struct slvl_device *slvl=d->priv;
+	int err = -1;
+	int unit = slvl->channel;
+	
+	/*
+	 *	Link layer up. 
+	 */
+
+	switch(unit)
+	{
+		case 0:
+			err=z8530_sync_dma_open(d, slvl->chan);
+			break;
+		case 1:
+			err=z8530_sync_open(d, slvl->chan);
+			break;
+	}
+	
+	if(err)
+		return err;
+	/*
+	 *	Begin PPP
+	 */
+	err=sppp_open(d);
+	if(err)
+	{
+		switch(unit)
+		{
+			case 0:
+				z8530_sync_dma_close(d, slvl->chan);
+				break;
+			case 1:
+				z8530_sync_close(d, slvl->chan);
+				break;
+		}				
+		return err;
+	}
+	
+	slvl->chan->rx_function=sealevel_input;
+	
+	/*
+	 *	Go go go
+	 */
+	d->tbusy=0;
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int sealevel_close(struct net_device *d)
+{
+	struct slvl_device *slvl=d->priv;
+	int unit = slvl->channel;
+	
+	/*
+	 *	Discard new frames
+	 */
+	
+	slvl->chan->rx_function=z8530_null_rx;
+		
+	/*
+	 *	PPP off
+	 */
+	sppp_close(d);
+	/*
+	 *	Link layer down
+	 */
+	d->tbusy=1;
+	
+	switch(unit)
+	{
+		case 0:
+			z8530_sync_dma_close(d, slvl->chan);
+			break;
+		case 1:
+			z8530_sync_close(d, slvl->chan);
+			break;
+	}
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
+{
+	/* struct slvl_device *slvl=d->priv;
+	   z8530_ioctl(d,&slvl->sync.chanA,ifr,cmd) */
+	return sppp_do_ioctl(d, ifr,cmd);
+}
+
+static struct enet_statistics *sealevel_get_stats(struct net_device *d)
+{
+	struct slvl_device *slvl=d->priv;
+	if(slvl)
+		return z8530_get_stats(slvl->chan);
+	else
+		return NULL;
+}
+
+/*
+ *	Passed PPP frames, fire them downwind.
+ */
+ 
+static int sealevel_queue_xmit(struct sk_buff *skb, struct net_device *d)
+{
+	struct slvl_device *slvl=d->priv;
+	return z8530_queue_xmit(slvl->chan, skb);
+}
+
+#ifdef LINUX_21
+static int sealevel_neigh_setup(struct neighbour *n)
+{
+	if (n->nud_state == NUD_NONE) {
+		n->ops = &arp_broken_ops;
+		n->output = n->ops->output;
+	}
+	return 0;
+}
+
+static int sealevel_neigh_setup_dev(struct net_device *dev, struct neigh_parms *p)
+{
+	if (p->tbl->family == AF_INET) {
+		p->neigh_setup = sealevel_neigh_setup;
+		p->ucast_probes = 0;
+		p->mcast_probes = 0;
+	}
+	return 0;
+}
+
+#else
+
+static int return_0(struct net_device *d)
+{
+	return 0;
+}
+
+#endif
+
+/*
+ *	Description block for a Comtrol Hostess SV11 card
+ */
+ 
+static struct slvl_board *slvl_init(int iobase, int irq, int txdma, int rxdma, int slow)
+{
+	struct z8530_dev *dev;
+	struct slvl_device *sv;
+	struct slvl_board *b;
+	
+	int i;
+	unsigned long flags;
+	int u;
+	
+	/*
+	 *	Get the needed I/O space
+	 */
+	 
+	if(check_region(iobase, 8))
+	{	
+		printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n", iobase);
+		return NULL;
+	}
+	request_region(iobase, 8, "Sealevel 4021");
+	
+	b=(struct slvl_board *)kmalloc(sizeof(struct slvl_board), GFP_KERNEL);
+	if(!b)
+		goto fail3;
+			
+	memset(b, 0, sizeof(*sv));
+
+	b->dev[0].chan = &b->board.chanA;	
+	b->dev[1].chan = &b->board.chanB;
+	
+	dev=&b->board;
+	
+	/*
+	 *	Stuff in the I/O addressing
+	 */
+	 
+	dev->active = 0;
+
+	b->iobase = iobase;
+	
+	/*
+	 *	Select 8530 delays for the old board
+	 */
+	 
+	if(slow)
+		iobase |= Z8530_PORT_SLEEP;
+		
+	dev->chanA.ctrlio=iobase+1;
+	dev->chanA.dataio=iobase;
+	dev->chanB.ctrlio=iobase+3;
+	dev->chanB.dataio=iobase+2;
+	
+	dev->chanA.irqs=&z8530_nop;
+	dev->chanB.irqs=&z8530_nop;
+	
+	/*
+	 *	Assert DTR enable DMA
+	 */
+	 
+	outb(3|(1<<7), b->iobase+4);	
+	
+
+	/* We want a fast IRQ for this device. Actually we'd like an even faster
+	   IRQ ;) - This is one driver RtLinux is made for */
+   
+	if(request_irq(irq, &z8530_interrupt, SA_INTERRUPT, "SeaLevel", dev)<0)
+	{
+		printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq);
+		goto fail2;
+	}
+	
+	dev->irq=irq;
+	dev->chanA.private=&b->dev[0];
+	dev->chanB.private=&b->dev[1];
+	dev->chanA.netdevice=&b->dev[0].netdev.dev;
+	dev->chanB.netdevice=&b->dev[1].netdev.dev;
+	dev->chanA.dev=dev;
+	dev->chanB.dev=dev;
+	dev->name=b->dev[0].name;
+
+	dev->chanA.txdma=3;
+	dev->chanA.rxdma=1;
+	if(request_dma(dev->chanA.txdma, "SeaLevel (TX)")!=0)
+		goto fail;
+		
+	if(request_dma(dev->chanA.rxdma, "SeaLevel (RX)")!=0)
+		goto dmafail;
+	
+	save_flags(flags);
+	cli();
+	
+	/*
+	 *	Begin normal initialise
+	 */
+	 
+	if(z8530_init(dev)!=0)
+	{
+		printk(KERN_ERR "Z8530 series device not found.\n");
+		goto dmafail2;
+	}
+	if(dev->type==Z85C30)
+	{
+		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
+		z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
+	}
+	else
+	{
+		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
+		z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
+	}
+
+	/*
+	 *	Now we can take the IRQ
+	 */
+	
+	restore_flags(flags);
+
+	for(u=0; u<2; u++)
+	{
+		sv=&b->dev[u];
+		sv->channel = u;
+	
+		for(i=0;i<999;i++)
+		{
+			sprintf(sv->name,"hdlc%d", i);
+			if(dev_get(sv->name)==0)
+			{
+				struct net_device *d=sv->chan->netdevice;
+	
+				/* 
+				 *	Initialise the PPP components
+				 */
+				sppp_attach(&sv->netdev);
+			
+				/*
+				 *	Local fields
+				 */	
+				sprintf(sv->name,"hdlc%d", i);
+				
+				d->name = sv->name;
+				d->base_addr = iobase;
+				d->irq = irq;
+				d->priv = sv;
+				d->init = NULL;
+			
+				d->open = sealevel_open;
+				d->stop = sealevel_close;
+				d->hard_start_xmit = sealevel_queue_xmit;
+				d->get_stats = sealevel_get_stats;
+				d->set_multicast_list = NULL;
+				d->do_ioctl = sealevel_ioctl;
+#ifdef LINUX_21			
+				d->neigh_setup = sealevel_neigh_setup_dev;
+				dev_init_buffers(d);
+#else
+				d->init = return_0;
+#endif
+				d->set_mac_address = NULL;
+			
+				if(register_netdev(d)==-1)
+				{
+					printk(KERN_ERR "%s: unable to register device.\n",
+						sv->name);
+					goto fail_unit;
+				}				
+
+				break;
+			}
+		}
+	}
+	z8530_describe(dev, "I/O", iobase);
+	dev->active=1;
+	return b;
+
+fail_unit:
+	if(u==1)
+		unregister_netdev(b->dev[0].chan->netdevice);
+	
+dmafail2:
+	free_dma(dev->chanA.rxdma);
+dmafail:
+	free_dma(dev->chanA.txdma);
+fail:
+	free_irq(irq, dev);
+fail2:
+	kfree(b);
+fail3:
+	release_region(iobase,8);
+	return NULL;
+}
+
+static void slvl_shutdown(struct slvl_board *b)
+{
+	int u;
+
+	z8530_shutdown(&b->board);
+	
+	for(u=0; u<2; u++)
+	{
+		sppp_detach(&b->dev[u].netdev.dev);
+		unregister_netdev(&b->dev[u].netdev.dev);
+	}
+	
+	free_irq(b->board.irq, &b->board);
+	free_dma(b->board.chanA.rxdma);
+	free_dma(b->board.chanA.txdma);
+	/* DMA off on the card, drop DTR */
+	outb(0, b->iobase);
+	release_region(b->iobase, 8);
+}
+
+#ifdef MODULE
+
+static int io=0x238;
+static int txdma=1;
+static int rxdma=3;
+static int irq=5;
+static int slow=0;
+
+#ifdef LINUX_21
+MODULE_PARM(io,"i");
+MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
+MODULE_PARM(txdma,"i");
+MODULE_PARM_DESC(txdma, "Transmit DMA channel");
+MODULE_PARM(rxdma,"i");
+MODULE_PARM_DESC(rxdma, "Receive DMA channel");
+MODULE_PARM(irq,"i");
+MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
+MODULE_PARM(slow,"i");
+MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
+
+MODULE_AUTHOR("Bulding Number Three Ltd");
+MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
+#endif
+
+static struct slvl_board *slvl_unit;
+
+int init_module(void)
+{
+	printk(KERN_INFO "SeaLevel Z85230 Synchronous Driver v 0.01.\n");
+	printk(KERN_INFO "(c) Copyright 1998, Building Number Three Ltd.\n");	
+	if((slvl_unit=slvl_init(io,irq, txdma, rxdma, slow))==NULL)
+		return -ENODEV;
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	if(slvl_unit)
+		slvl_shutdown(slvl_unit);
+}
+
+#endif
+