patch-2.1.121 linux/drivers/net/hostess_sv11.c

• Lines: 386
• Date: Tue Sep 8 23:20:41 1998
• Orig file: v2.1.120/linux/drivers/net/hostess_sv11.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.120/linux/drivers/net/hostess_sv11.c linux/drivers/net/hostess_sv11.c
@@ -0,0 +1,385 @@
+/*
+ *	Comtrol SV11 card driver
+ *
+ *	This is a slightly odd Z85230 synchronous driver. All you need to
+ *	know basically is
+ *
+ *	Its a genuine Z85230
+ *
+ *	It supports DMA using two DMA channels in SYNC mode. The driver doesn't
+ *	use these facilities (yet).
+ *	
+ *	The control port is at io+1, the data at io+3 and turning off the DMA
+ *	is done by writing 0 to io+4
+ *
+ *	The hardware does the bus handling to avoid the need for delays between
+ *	touching control registers.
+ *
+ *	Port B isnt wired (why - beats me)
+ */
+
+#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"
+
+static int dma;
+
+struct sv11_device
+{
+	struct z8530_dev sync;
+	struct ppp_device netdev;
+	char name[16];
+};
+
+/*
+ *	Network driver support routines
+ */
+
+/*
+ *	Frame receive. Simple for our card as we do sync ppp and there
+ *	is no funny garbage involved. This is very timing sensitive.
+ */
+ 
+static void hostess_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->dev=c->netdevice;
+	/*
+	 *	Send it to the PPP layer. We dont have time to process
+	 *	it right now.
+	 */
+	skb->mac.raw = skb->data;
+	
+	netif_rx(skb);
+}
+ 
+/*
+ *	We've been placed in the UP state
+ */ 
+ 
+static int hostess_open(struct device *d)
+{
+	struct sv11_device *sv11=d->priv;
+	int err;
+	
+	/*
+	 *	Link layer up
+	 */
+	if(dma)
+		err=z8530_sync_dma_open(d, &sv11->sync.chanA);
+	else
+		err=z8530_sync_open(d, &sv11->sync.chanA);
+	if(err)
+		return err;
+	/*
+	 *	Begin PPP
+	 */
+	err=sppp_open(d);
+	if(err)
+	{
+		if(dma)
+			z8530_sync_dma_close(d, &sv11->sync.chanA);
+		else
+			z8530_sync_close(d, &sv11->sync.chanA);
+		return err;
+	}
+	sv11->sync.chanA.rx_function=hostess_input;
+	
+	/*
+	 *	Go go go
+	 */
+	d->tbusy=0;
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+static int hostess_close(struct device *d)
+{
+	struct sv11_device *sv11=d->priv;
+	/*
+	 *	Discard new frames
+	 */
+	sv11->sync.chanA.rx_function=z8530_null_rx;
+	/*
+	 *	PPP off
+	 */
+	sppp_close(d);
+	/*
+	 *	Link layer down
+	 */
+	d->tbusy=1;
+	if(dma)
+		z8530_sync_dma_close(d, &sv11->sync.chanA);
+	else
+		z8530_sync_close(d, &sv11->sync.chanA);
+	MOD_DEC_USE_COUNT;
+	return 0;
+}
+
+static int hostess_ioctl(struct device *d, struct ifreq *ifr, int cmd)
+{
+	struct sv11_device *sv11=d->priv;
+	/* z8530_ioctl(d,&sv11->sync.chanA,ifr,cmd) */
+	return sppp_do_ioctl(d, ifr, cmd);
+}
+
+static struct net_device_stats *hostess_get_stats(struct device *d)
+{
+	struct sv11_device *sv11=d->priv;
+	if(sv11)
+		return z8530_get_stats(&sv11->sync.chanA);
+	else
+		return NULL;
+}
+
+/*
+ *	Passed PPP frames, fire them downwind.
+ */
+ 
+static int hostess_queue_xmit(struct sk_buff *skb, struct device *d)
+{
+	struct sv11_device *sv11=d->priv;
+	return z8530_queue_xmit(&sv11->sync.chanA, skb);
+}
+
+static int hostess_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 hostess_neigh_setup_dev(struct device *dev, struct neigh_parms *p)
+{
+	if (p->tbl->family == AF_INET) {
+		p->neigh_setup = hostess_neigh_setup;
+		p->ucast_probes = 0;
+		p->mcast_probes = 0;
+	}
+	return 0;
+}
+
+/*
+ *	Description block for a Comtrol Hostess SV11 card
+ */
+ 
+static struct sv11_device *sv11_init(int iobase, int irq)
+{
+	struct z8530_dev *dev;
+	struct sv11_device *sv;
+	int i;
+	unsigned long flags;
+	
+	/*
+	 *	Get the needed I/O space
+	 */
+	 
+	if(check_region(iobase, 8))
+	{	
+		printk(KERN_WARNING "hostess: I/O 0x%X already in use.\n", iobase);
+		return NULL;
+	}
+	request_region(iobase, 8, "Comtrol SV11");
+	
+	sv=(struct sv11_device *)kmalloc(sizeof(struct sv11_device), GFP_KERNEL);
+	if(!sv)
+		goto fail3;
+			
+	memset(sv, 0, sizeof(*sv));
+	
+	dev=&sv->sync;
+	
+	/*
+	 *	Stuff in the I/O addressing
+	 */
+	 
+	dev->active = 0;
+	
+	dev->chanA.ctrlio=iobase+1;
+	dev->chanA.dataio=iobase+3;
+	dev->chanB.ctrlio=-1;
+	dev->chanB.dataio=-1;
+	dev->chanA.irqs=&z8530_nop;
+	dev->chanB.irqs=&z8530_nop;
+	
+	outb(0, iobase+4);		/* DMA off */
+	
+	/* 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, "Hostess SV/11", dev)<0)
+	{
+		printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq);
+		goto fail2;
+	}
+	
+	dev->irq=irq;
+	dev->chanA.private=sv;
+	dev->chanA.netdevice=&sv->netdev.dev;
+	dev->chanA.dev=dev;
+	dev->chanB.dev=dev;
+	dev->name=sv->name;
+	
+	if(dma)
+	{
+		/*
+		 *	You can have DMA off or 1 and 3 thats the lot
+		 *	on the Comtrol.
+		 */
+		dev->chanA.txdma=1;
+		dev->chanA.rxdma=3;
+		outb(14, iobase+4);		/* DMA on */
+		if(request_dma(dev->chanA.txdma, "Hostess SV/11 (TX)")!=0)
+			goto fail;
+		if(request_dma(dev->chanA.rxdma, "Hostess SV/11 (RX)")!=0)
+			goto dmafail;
+	}
+	save_flags(flags);
+	cli();
+	
+	/*
+	 *	Begin normal initialise
+	 */
+	 
+	if(z8530_init(dev)!=0)
+		goto dmafail2;
+	z8530_channel_load(&dev->chanB, z8530_dead_port);
+	if(dev->type==Z85C30)
+		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
+	else
+		z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
+	
+	restore_flags(flags);
+
+
+	printk(KERN_INFO "begin loading hdlc\n");
+	
+	/*
+	 *	Now we can take the IRQ
+	 */
+	
+	for(i=0;i<999;i++)
+	{
+		sprintf(sv->name,"hdlc%d", i);
+		if(dev_get(sv->name)==NULL)
+		{
+			struct device *d=dev->chanA.netdevice;
+	
+			/* 
+			 *	Initialise the PPP components
+			 */
+			sppp_attach(&sv->netdev);
+			
+			/*
+			 *	Local fields
+			 */	
+			sprintf(sv->name,"hdlc%d", i);
+			printk("Filling in device '%s' at %p\n", sv->name, d);
+			
+			d->name = sv->name;
+			d->base_addr = iobase;
+			d->irq = irq;
+			d->priv = sv;
+			d->init = NULL;
+			
+			d->open = hostess_open;
+			d->stop = hostess_close;
+			d->hard_start_xmit = hostess_queue_xmit;
+			d->get_stats = hostess_get_stats;
+			d->set_multicast_list = NULL;
+			d->do_ioctl = hostess_ioctl;
+			d->neigh_setup = hostess_neigh_setup_dev;
+			dev_init_buffers(d);
+			d->set_mac_address = NULL;
+			
+			if(register_netdev(d)==-1)
+			{
+				printk(KERN_ERR "%s: unable to register device.\n",
+					sv->name);
+				goto fail;
+			}				
+
+			z8530_describe(dev, "I/O", iobase);
+			dev->active=1;
+		 	return sv;	
+		}
+	}
+dmafail2:
+	if(!dma)
+		goto fail;
+	free_dma(dev->chanA.rxdma);
+dmafail:
+	free_dma(dev->chanA.txdma);
+fail:
+	free_irq(irq, dev);
+fail2:
+	kfree(sv);
+fail3:
+	release_region(iobase,8);
+	return NULL;
+}
+
+static void sv11_shutdown(struct sv11_device *dev)
+{
+	sppp_detach(&dev->netdev.dev);
+	z8530_shutdown(&dev->sync);
+	unregister_netdev(&dev->netdev.dev);
+	free_irq(dev->sync.irq, dev);
+	free_dma(dev->sync.chanA.rxdma);
+	free_dma(dev->sync.chanA.txdma);
+	release_region(dev->sync.chanA.ctrlio-1, 8);
+}
+
+#ifdef MODULE
+
+static int io=0x200;
+static int irq=9;
+
+MODULE_PARM(io,"i");
+MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
+MODULE_PARM(dma,"i");
+MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
+MODULE_PARM(irq,"i");
+MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");
+
+MODULE_AUTHOR("Bulding Number Three Ltd");
+MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
+
+static struct sv11_device *sv11_unit;
+
+int init_module(void)
+{
+	printk(KERN_INFO "SV-11 Z85230 Synchronous Driver v 0.02.\n");
+	printk(KERN_INFO "(c) Copyright 1998, Building Number Three Ltd.\n");	
+	if(dma)
+		printk(KERN_WARNING "DMA mode probably wont work right now.\n");
+	if((sv11_unit=sv11_init(io,irq))==NULL)
+		return -ENODEV;
+	return 0;
+}
+
+void cleanup_module(void)
+{
+	if(sv11_unit)
+		sv11_shutdown(sv11_unit);
+}
+
+#endif
+