drivers/net/wan/hostess_sv11.c - kernel/msm - Gitiles

 /*
  *	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
  *
  *	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/irq.h>
 #include <asm/io.h>
 #include <asm/dma.h>
 #include <asm/byteorder.h>
 #include <net/syncppp.h>
 #include "z85230.h"

 static int dma;

 struct sv11_device
 {
 	void *if_ptr;	/* General purpose pointer (used by SPPP) */
 	struct z8530_dev sync;
 	struct ppp_device netdev;
 };

 /*
  *	Network driver support routines
  */

 /*
  *	Frame receive. Simple for our card as we do sync ppp and there
  *	is no funny garbage involved
  */

 static void hostess_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=__constant_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 hostess_open(struct net_device *d)
 {
 	struct sv11_device *sv11=d->priv;
 	int err = -1;

 	/*
 	 *	Link layer up
 	 */
 	switch(dma)
 	{
 		case 0:
 			err=z8530_sync_open(d, &sv11->sync.chanA);
 			break;
 		case 1:
 			err=z8530_sync_dma_open(d, &sv11->sync.chanA);
 			break;
 		case 2:
 			err=z8530_sync_txdma_open(d, &sv11->sync.chanA);
 			break;
 	}

 	if(err)
 		return err;
 	/*
 	 *	Begin PPP
 	 */
 	err=sppp_open(d);
 	if(err)
 	{
 		switch(dma)
 		{
 			case 0:
 				z8530_sync_close(d, &sv11->sync.chanA);
 				break;
 			case 1:
 				z8530_sync_dma_close(d, &sv11->sync.chanA);
 				break;
 			case 2:
 				z8530_sync_txdma_close(d, &sv11->sync.chanA);
 				break;
 		}
 		return err;
 	}
 	sv11->sync.chanA.rx_function=hostess_input;

 	/*
 	 *	Go go go
 	 */

 	netif_start_queue(d);
 	return 0;
 }

 static int hostess_close(struct net_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
 	 */
 	netif_stop_queue(d);

 	switch(dma)
 	{
 		case 0:
 			z8530_sync_close(d, &sv11->sync.chanA);
 			break;
 		case 1:
 			z8530_sync_dma_close(d, &sv11->sync.chanA);
 			break;
 		case 2:
 			z8530_sync_txdma_close(d, &sv11->sync.chanA);
 			break;
 	}
 	return 0;
 }

 static int hostess_ioctl(struct net_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 net_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 net_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 net_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;
 }

 static void sv11_setup(struct net_device *dev)
 {
 	dev->open = hostess_open;
 	dev->stop = hostess_close;
 	dev->hard_start_xmit = hostess_queue_xmit;
 	dev->get_stats = hostess_get_stats;
 	dev->do_ioctl = hostess_ioctl;
 	dev->neigh_setup = hostess_neigh_setup_dev;
 }

 /*
  *	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;

 	/*
 	 *	Get the needed I/O space
 	 */

 	if(!request_region(iobase, 8, "Comtrol SV11"))
 	{
 		printk(KERN_WARNING "hostess: I/O 0x%X already in use.\n", iobase);
 		return NULL;
 	}

 	sv = kmalloc(sizeof(struct sv11_device), GFP_KERNEL);
 	if(!sv)
 		goto fail3;

 	memset(sv, 0, sizeof(*sv));
 	sv->if_ptr=&sv->netdev;

 	sv->netdev.dev = alloc_netdev(0, "hdlc%d", sv11_setup);
 	if(!sv->netdev.dev)
 		goto fail2;

 	SET_MODULE_OWNER(sv->netdev.dev);

 	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, IRQF_DISABLED, "Hostess SV11", dev)<0)
 	{
 		printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq);
 		goto fail1;
 	}

 	dev->irq=irq;
 	dev->chanA.private=sv;
 	dev->chanA.netdevice=sv->netdev.dev;
 	dev->chanA.dev=dev;
 	dev->chanB.dev=dev;

 	if(dma)
 	{
 		/*
 		 *	You can have DMA off or 1 and 3 thats the lot
 		 *	on the Comtrol.
 		 */
 		dev->chanA.txdma=3;
 		dev->chanA.rxdma=1;
 		outb(0x03|0x08, iobase+4);		/* DMA on */
 		if(request_dma(dev->chanA.txdma, "Hostess SV/11 (TX)")!=0)
 			goto fail;

 		if(dma==1)
 		{
 			if(request_dma(dev->chanA.rxdma, "Hostess SV/11 (RX)")!=0)
 				goto dmafail;
 		}
 	}

 	/* Kill our private IRQ line the hostess can end up chattering
 	   until the configuration is set */
 	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;
 	}
 	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);

 	enable_irq(irq);


 	/*
 	 *	Now we can take the IRQ
 	 */
 	if(dev_alloc_name(dev->chanA.netdevice,"hdlc%d")>=0)
 	{
 		struct net_device *d=dev->chanA.netdevice;

 		/*
 		 *	Initialise the PPP components
 		 */
 		sppp_attach(&sv->netdev);

 		/*
 		 *	Local fields
 		 */

 		d->base_addr = iobase;
 		d->irq = irq;
 		d->priv = sv;

 		if(register_netdev(d))
 		{
 			printk(KERN_ERR "%s: unable to register device.\n",
 				d->name);
 			sppp_detach(d);
 			goto dmafail2;
 		}

 		z8530_describe(dev, "I/O", iobase);
 		dev->active=1;
 		return sv;
 	}
 dmafail2:
 	if(dma==1)
 		free_dma(dev->chanA.rxdma);
 dmafail:
 	if(dma)
 		free_dma(dev->chanA.txdma);
 fail:
 	free_irq(irq, dev);
 fail1:
 	free_netdev(sv->netdev.dev);
 fail2:
 	kfree(sv);
 fail3:
 	release_region(iobase,8);
 	return NULL;
 }

 static void sv11_shutdown(struct sv11_device *dev)
 {
 	sppp_detach(dev->netdev.dev);
 	unregister_netdev(dev->netdev.dev);
 	z8530_shutdown(&dev->sync);
 	free_irq(dev->sync.irq, dev);
 	if(dma)
 	{
 		if(dma==1)
 			free_dma(dev->sync.chanA.rxdma);
 		free_dma(dev->sync.chanA.txdma);
 	}
 	release_region(dev->sync.chanA.ctrlio-1, 8);
 	free_netdev(dev->netdev.dev);
 	kfree(dev);
 }

 #ifdef MODULE

 static int io=0x200;
 static int irq=9;

 module_param(io, int, 0);
 MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
 module_param(dma, int, 0);
 MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
 module_param(irq, int, 0);
 MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");

 MODULE_AUTHOR("Alan Cox");
 MODULE_LICENSE("GPL");
 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 0.03.\n");
 	printk(KERN_INFO "(c) Copyright 2001, Red Hat Inc.\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
	/*
	* 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
	*
	* 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/irq.h>
	#include <asm/io.h>
	#include <asm/dma.h>
	#include <asm/byteorder.h>
	#include <net/syncppp.h>
	#include "z85230.h"

	static int dma;

	struct sv11_device
	{
	void if_ptr; / General purpose pointer (used by SPPP) */
	struct z8530_dev sync;
	struct ppp_device netdev;
	};

	/*
	* Network driver support routines
	*/

	/*
	* Frame receive. Simple for our card as we do sync ppp and there
	* is no funny garbage involved
	*/

	static void hostess_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=__constant_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 hostess_open(struct net_device *d)
	{
	struct sv11_device *sv11=d->priv;
	int err = -1;

	/*
	* Link layer up
	*/
	switch(dma)
	{
	case 0:
	err=z8530_sync_open(d, &sv11->sync.chanA);
	break;
	case 1:
	err=z8530_sync_dma_open(d, &sv11->sync.chanA);
	break;
	case 2:
	err=z8530_sync_txdma_open(d, &sv11->sync.chanA);
	break;
	}

	if(err)
	return err;
	/*
	* Begin PPP
	*/
	err=sppp_open(d);
	if(err)
	{
	switch(dma)
	{
	case 0:
	z8530_sync_close(d, &sv11->sync.chanA);
	break;
	case 1:
	z8530_sync_dma_close(d, &sv11->sync.chanA);
	break;
	case 2:
	z8530_sync_txdma_close(d, &sv11->sync.chanA);
	break;
	}
	return err;
	}
	sv11->sync.chanA.rx_function=hostess_input;

	/*
	* Go go go
	*/

	netif_start_queue(d);
	return 0;
	}

	static int hostess_close(struct net_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
	*/
	netif_stop_queue(d);

	switch(dma)
	{
	case 0:
	z8530_sync_close(d, &sv11->sync.chanA);
	break;
	case 1:
	z8530_sync_dma_close(d, &sv11->sync.chanA);
	break;
	case 2:
	z8530_sync_txdma_close(d, &sv11->sync.chanA);
	break;
	}
	return 0;
	}

	static int hostess_ioctl(struct net_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 net_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 net_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 net_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;
	}

	static void sv11_setup(struct net_device *dev)
	{
	dev->open = hostess_open;
	dev->stop = hostess_close;
	dev->hard_start_xmit = hostess_queue_xmit;
	dev->get_stats = hostess_get_stats;
	dev->do_ioctl = hostess_ioctl;
	dev->neigh_setup = hostess_neigh_setup_dev;
	}

	/*
	* 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;

	/*
	* Get the needed I/O space
	*/

	if(!request_region(iobase, 8, "Comtrol SV11"))
	{
	printk(KERN_WARNING "hostess: I/O 0x%X already in use.\n", iobase);
	return NULL;
	}

	sv = kmalloc(sizeof(struct sv11_device), GFP_KERNEL);
	if(!sv)
	goto fail3;

	memset(sv, 0, sizeof(*sv));
	sv->if_ptr=&sv->netdev;

	sv->netdev.dev = alloc_netdev(0, "hdlc%d", sv11_setup);
	if(!sv->netdev.dev)
	goto fail2;

	SET_MODULE_OWNER(sv->netdev.dev);

	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, IRQF_DISABLED, "Hostess SV11", dev)<0)
	{
	printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq);
	goto fail1;
	}

	dev->irq=irq;
	dev->chanA.private=sv;
	dev->chanA.netdevice=sv->netdev.dev;
	dev->chanA.dev=dev;
	dev->chanB.dev=dev;

	if(dma)
	{
	/*
	* You can have DMA off or 1 and 3 thats the lot
	* on the Comtrol.
	*/
	dev->chanA.txdma=3;
	dev->chanA.rxdma=1;
	outb(0x03\|0x08, iobase+4); /* DMA on */
	if(request_dma(dev->chanA.txdma, "Hostess SV/11 (TX)")!=0)
	goto fail;

	if(dma==1)
	{
	if(request_dma(dev->chanA.rxdma, "Hostess SV/11 (RX)")!=0)
	goto dmafail;
	}
	}

	/* Kill our private IRQ line the hostess can end up chattering
	until the configuration is set */
	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;
	}
	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);

	enable_irq(irq);


	/*
	* Now we can take the IRQ
	*/
	if(dev_alloc_name(dev->chanA.netdevice,"hdlc%d")>=0)
	{
	struct net_device *d=dev->chanA.netdevice;

	/*
	* Initialise the PPP components
	*/
	sppp_attach(&sv->netdev);

	/*
	* Local fields
	*/

	d->base_addr = iobase;
	d->irq = irq;
	d->priv = sv;

	if(register_netdev(d))
	{
	printk(KERN_ERR "%s: unable to register device.\n",
	d->name);
	sppp_detach(d);
	goto dmafail2;
	}

	z8530_describe(dev, "I/O", iobase);
	dev->active=1;
	return sv;
	}
	dmafail2:
	if(dma==1)
	free_dma(dev->chanA.rxdma);
	dmafail:
	if(dma)
	free_dma(dev->chanA.txdma);
	fail:
	free_irq(irq, dev);
	fail1:
	free_netdev(sv->netdev.dev);
	fail2:
	kfree(sv);
	fail3:
	release_region(iobase,8);
	return NULL;
	}

	static void sv11_shutdown(struct sv11_device *dev)
	{
	sppp_detach(dev->netdev.dev);
	unregister_netdev(dev->netdev.dev);
	z8530_shutdown(&dev->sync);
	free_irq(dev->sync.irq, dev);
	if(dma)
	{
	if(dma==1)
	free_dma(dev->sync.chanA.rxdma);
	free_dma(dev->sync.chanA.txdma);
	}
	release_region(dev->sync.chanA.ctrlio-1, 8);
	free_netdev(dev->netdev.dev);
	kfree(dev);
	}

	#ifdef MODULE

	static int io=0x200;
	static int irq=9;

	module_param(io, int, 0);
	MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
	module_param(dma, int, 0);
	MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
	module_param(irq, int, 0);
	MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");

	MODULE_AUTHOR("Alan Cox");
	MODULE_LICENSE("GPL");
	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 0.03.\n");
	printk(KERN_INFO "(c) Copyright 2001, Red Hat Inc.\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