1 files changed, 469 insertions, 0 deletions

diff --git a/drivers/net/wan/sealevel.c b/drivers/net/wan/sealevel.c
new file mode 100644
index 000000000000..5380ddfcd7d5
--- /dev/null
+++ b/drivers/net/wan/sealevel.c
@@ -0,0 +1,469 @@
+/*
+ *	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, 2001 Alan Cox
+ *	(c) Copyright 2001 Red Hat Inc.
+ *
+ */
+
+#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 <linux/init.h>
+#include <net/arp.h>
+
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/byteorder.h>
+#include <net/syncppp.h>
+#include "z85230.h"
+
+
+struct slvl_device
+{
+	void *if_ptr;	/* General purpose pointer (used by SPPP) */
+	struct z8530_channel *chan;
+	struct ppp_device pppdev;
+	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 - it's 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 don't have time to process
+	 *	it right now.
+	 */
+	netif_rx(skb);
+	c->netdevice->last_rx = jiffies;
+}
+ 
+/*
+ *	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
+	 */
+	netif_start_queue(d);
+	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
+	 */
+
+	netif_stop_queue(d);
+		
+	switch(unit)
+	{
+		case 0:
+			z8530_sync_dma_close(d, slvl->chan);
+			break;
+		case 1:
+			z8530_sync_close(d, slvl->chan);
+			break;
+	}
+	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 net_device_stats *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);
+}
+
+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;
+}
+
+static int sealevel_attach(struct net_device *dev)
+{
+	struct slvl_device *sv = dev->priv;
+	sppp_attach(&sv->pppdev);
+	return 0;
+}
+
+static void sealevel_detach(struct net_device *dev)
+{
+	sppp_detach(dev);
+}
+		
+static void slvl_setup(struct net_device *d)
+{
+	d->open = sealevel_open;
+	d->stop = sealevel_close;
+	d->init = sealevel_attach;
+	d->uninit = sealevel_detach;
+	d->hard_start_xmit = sealevel_queue_xmit;
+	d->get_stats = sealevel_get_stats;
+	d->set_multicast_list = NULL;
+	d->do_ioctl = sealevel_ioctl;
+	d->neigh_setup = sealevel_neigh_setup_dev;
+	d->set_mac_address = NULL;
+
+}
+
+static inline struct slvl_device *slvl_alloc(int iobase, int irq)
+{
+	struct net_device *d;
+	struct slvl_device *sv;
+
+	d = alloc_netdev(sizeof(struct slvl_device), "hdlc%d",
+			 slvl_setup);
+
+	if (!d) 
+		return NULL;
+
+	sv = d->priv;
+	sv->if_ptr = &sv->pppdev;
+	sv->pppdev.dev = d;
+	d->base_addr = iobase;
+	d->irq = irq;
+		
+	return sv;
+}
+
+
+/*
+ *	Allocate and setup Sealevel board.
+ */
+ 
+static __init struct slvl_board *slvl_init(int iobase, int irq, 
+					   int txdma, int rxdma, int slow)
+{
+	struct z8530_dev *dev;
+	struct slvl_board *b;
+	
+	/*
+	 *	Get the needed I/O space
+	 */
+
+	if(!request_region(iobase, 8, "Sealevel 4021")) 
+	{	
+		printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n", iobase);
+		return NULL;
+	}
+	
+	b = kmalloc(sizeof(struct slvl_board), GFP_KERNEL);
+	if(!b)
+		goto fail3;
+
+	memset(b, 0, sizeof(*b));
+	if (!(b->dev[0]= slvl_alloc(iobase, irq)))
+		goto fail2;
+
+	b->dev[0]->chan = &b->board.chanA;	
+	b->dev[0]->channel = 0;
+	
+	if (!(b->dev[1] = slvl_alloc(iobase, irq)))
+		goto fail1_0;
+
+	b->dev[1]->chan = &b->board.chanB;
+	b->dev[1]->channel = 1;
+
+	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 fail1_1;
+	}
+	
+	dev->irq=irq;
+	dev->chanA.private=&b->dev[0];
+	dev->chanB.private=&b->dev[1];
+	dev->chanA.netdevice=b->dev[0]->pppdev.dev;
+	dev->chanB.netdevice=b->dev[1]->pppdev.dev;
+	dev->chanA.dev=dev;
+	dev->chanB.dev=dev;
+
+	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;
+	
+	disable_irq(irq);
+		
+	/*
+	 *	Begin normal initialise
+	 */
+	 
+	if(z8530_init(dev)!=0)
+	{
+		printk(KERN_ERR "Z8530 series device not found.\n");
+		enable_irq(irq);
+		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
+	 */
+	
+	enable_irq(irq);
+
+	if (register_netdev(b->dev[0]->pppdev.dev)) 
+		goto dmafail2;
+		
+	if (register_netdev(b->dev[1]->pppdev.dev)) 
+		goto fail_unit;
+
+	z8530_describe(dev, "I/O", iobase);
+	dev->active=1;
+	return b;
+
+fail_unit:
+	unregister_netdev(b->dev[0]->pppdev.dev);
+	
+dmafail2:
+	free_dma(dev->chanA.rxdma);
+dmafail:
+	free_dma(dev->chanA.txdma);
+fail:
+	free_irq(irq, dev);
+fail1_1:
+	free_netdev(b->dev[1]->pppdev.dev);
+fail1_0:
+	free_netdev(b->dev[0]->pppdev.dev);
+fail2:
+	kfree(b);
+fail3:
+	release_region(iobase,8);
+	return NULL;
+}
+
+static void __exit slvl_shutdown(struct slvl_board *b)
+{
+	int u;
+
+	z8530_shutdown(&b->board);
+	
+	for(u=0; u<2; u++)
+	{
+		struct net_device *d = b->dev[u]->pppdev.dev;
+		unregister_netdev(d);
+		free_netdev(d);
+	}
+	
+	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);
+	kfree(b);
+}
+
+
+static int io=0x238;
+static int txdma=1;
+static int rxdma=3;
+static int irq=5;
+static int slow=0;
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "The I/O base of the Sealevel card");
+module_param(txdma, int, 0);
+MODULE_PARM_DESC(txdma, "Transmit DMA channel");
+module_param(rxdma, int, 0);
+MODULE_PARM_DESC(rxdma, "Receive DMA channel");
+module_param(irq, int, 0);
+MODULE_PARM_DESC(irq, "The interrupt line setting for the SeaLevel card");
+module_param(slow, bool, 0);
+MODULE_PARM_DESC(slow, "Set this for an older Sealevel card such as the 4012");
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Modular driver for the SeaLevel 4021");
+
+static struct slvl_board *slvl_unit;
+
+static int __init slvl_init_module(void)
+{
+#ifdef MODULE
+	printk(KERN_INFO "SeaLevel Z85230 Synchronous Driver v 0.02.\n");
+	printk(KERN_INFO "(c) Copyright 1998, Building Number Three Ltd.\n");
+#endif
+	slvl_unit = slvl_init(io, irq, txdma, rxdma, slow);
+
+	return slvl_unit ? 0 : -ENODEV;
+}
+
+static void __exit slvl_cleanup_module(void)
+{
+	if(slvl_unit)
+		slvl_shutdown(slvl_unit);
+}
+
+module_init(slvl_init_module);
+module_exit(slvl_cleanup_module);