[deliverable/linux.git] / drivers / net / wan / hostess_sv11.c

/*
 *	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_reset_mac_header(skb);
	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 = kzalloc(sizeof(struct sv11_device), GFP_KERNEL);
	if(!sv)
		goto fail3;
			
	sv->if_ptr=&sv->netdev;
	
	sv->netdev.dev = alloc_netdev(0, "hdlc%d", sv11_setup);
	if(!sv->netdev.dev)
		goto fail2;

	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
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Comtrol SV11 card driver
	3	*
	4	* This is a slightly odd Z85230 synchronous driver. All you need to
	5	* know basically is
	6	*
	7	* Its a genuine Z85230
	8	*
	9	* It supports DMA using two DMA channels in SYNC mode. The driver doesn't
	10	* use these facilities
	11	*
	12	* The control port is at io+1, the data at io+3 and turning off the DMA
	13	* is done by writing 0 to io+4
	14	*
	15	* The hardware does the bus handling to avoid the need for delays between
	16	* touching control registers.
	17	*
	18	* Port B isnt wired (why - beats me)
	19	*/
	20
	21	#include <linux/module.h>
	22	#include <linux/kernel.h>
	23	#include <linux/mm.h>
	24	#include <linux/net.h>
	25	#include <linux/skbuff.h>
	26	#include <linux/netdevice.h>
	27	#include <linux/if_arp.h>
	28	#include <linux/delay.h>
	29	#include <linux/ioport.h>
	30	#include <net/arp.h>
	31
82729971	32	#include <asm/irq.h>
1da177e4 LT	33	#include <asm/io.h>
	34	#include <asm/dma.h>
	35	#include <asm/byteorder.h>
	36	#include <net/syncppp.h>
	37	#include "z85230.h"
	38
	39	static int dma;
	40
	41	struct sv11_device
	42	{
	43	void if_ptr; / General purpose pointer (used by SPPP) */
	44	struct z8530_dev sync;
	45	struct ppp_device netdev;
	46	};
	47
	48	/*
	49	* Network driver support routines
	50	*/
	51
	52	/*
	53	* Frame receive. Simple for our card as we do sync ppp and there
	54	* is no funny garbage involved
	55	*/
	56
	57	static void hostess_input(struct z8530_channel c, struct sk_buff skb)
	58	{
	59	/* Drop the CRC - it's not a good idea to try and negotiate it ;) */
	60	skb_trim(skb, skb->len-2);
	61	skb->protocol=__constant_htons(ETH_P_WAN_PPP);
98e399f8	62	skb_reset_mac_header(skb);
1da177e4 LT	63	skb->dev=c->netdevice;
	64	/*
	65	* Send it to the PPP layer. We don't have time to process
	66	* it right now.
	67	*/
	68	netif_rx(skb);
	69	c->netdevice->last_rx = jiffies;
	70	}
	71
	72	/*
	73	* We've been placed in the UP state
	74	*/
	75
	76	static int hostess_open(struct net_device *d)
	77	{
	78	struct sv11_device *sv11=d->priv;
	79	int err = -1;
	80
	81	/*
	82	* Link layer up
	83	*/
	84	switch(dma)
	85	{
	86	case 0:
	87	err=z8530_sync_open(d, &sv11->sync.chanA);
	88	break;
	89	case 1:
	90	err=z8530_sync_dma_open(d, &sv11->sync.chanA);
	91	break;
	92	case 2:
	93	err=z8530_sync_txdma_open(d, &sv11->sync.chanA);
	94	break;
	95	}
	96
	97	if(err)
	98	return err;
	99	/*
	100	* Begin PPP
	101	*/
	102	err=sppp_open(d);
	103	if(err)
	104	{
	105	switch(dma)
	106	{
	107	case 0:
	108	z8530_sync_close(d, &sv11->sync.chanA);
	109	break;
	110	case 1:
	111	z8530_sync_dma_close(d, &sv11->sync.chanA);
	112	break;
	113	case 2:
	114	z8530_sync_txdma_close(d, &sv11->sync.chanA);
	115	break;
	116	}
	117	return err;
	118	}
	119	sv11->sync.chanA.rx_function=hostess_input;
	120
	121	/*
	122	* Go go go
	123	*/
	124
	125	netif_start_queue(d);
	126	return 0;
127	}
128
129	static int hostess_close(struct net_device *d)
130	{
131	struct sv11_device *sv11=d->priv;
132	/*
133	* Discard new frames
134	*/
135	sv11->sync.chanA.rx_function=z8530_null_rx;
136	/*
137	* PPP off
138	*/
139	sppp_close(d);
140	/*
141	* Link layer down
142	*/
143	netif_stop_queue(d);
144
145	switch(dma)
146	{
147	case 0:
148	z8530_sync_close(d, &sv11->sync.chanA);
149	break;
150	case 1:
151	z8530_sync_dma_close(d, &sv11->sync.chanA);
152	break;
153	case 2:
154	z8530_sync_txdma_close(d, &sv11->sync.chanA);
155	break;
156	}
157	return 0;
158	}
159
160	static int hostess_ioctl(struct net_device d, struct ifreq ifr, int cmd)
161	{
162	/* struct sv11_device *sv11=d->priv;
163	z8530_ioctl(d,&sv11->sync.chanA,ifr,cmd) */
164	return sppp_do_ioctl(d, ifr,cmd);
165	}
166
167	static struct net_device_stats hostess_get_stats(struct net_device d)
168	{
169	struct sv11_device *sv11=d->priv;
170	if(sv11)
171	return z8530_get_stats(&sv11->sync.chanA);
172	else
173	return NULL;
174	}
175
176	/*
177	* Passed PPP frames, fire them downwind.
178	*/
179
180	static int hostess_queue_xmit(struct sk_buff skb, struct net_device d)
181	{
182	struct sv11_device *sv11=d->priv;
183	return z8530_queue_xmit(&sv11->sync.chanA, skb);
184	}
185
186	static int hostess_neigh_setup(struct neighbour *n)
187	{
188	if (n->nud_state == NUD_NONE) {
189	n->ops = &arp_broken_ops;
190	n->output = n->ops->output;
191	}
192	return 0;
193	}
194
195	static int hostess_neigh_setup_dev(struct net_device dev, struct neigh_parms p)
196	{
197	if (p->tbl->family == AF_INET) {
198	p->neigh_setup = hostess_neigh_setup;
199	p->ucast_probes = 0;
200	p->mcast_probes = 0;
201	}
202	return 0;
203	}
204
205	static void sv11_setup(struct net_device *dev)
206	{
207	dev->open = hostess_open;
208	dev->stop = hostess_close;
209	dev->hard_start_xmit = hostess_queue_xmit;
210	dev->get_stats = hostess_get_stats;
211	dev->do_ioctl = hostess_ioctl;
212	dev->neigh_setup = hostess_neigh_setup_dev;
213	}
214
215	/*
216	* Description block for a Comtrol Hostess SV11 card
217	*/
218
219	static struct sv11_device *sv11_init(int iobase, int irq)
220	{
221	struct z8530_dev *dev;
222	struct sv11_device *sv;
223
224	/*
225	* Get the needed I/O space
226	*/
227
228	if(!request_region(iobase, 8, "Comtrol SV11"))
229	{
230	printk(KERN_WARNING "hostess: I/O 0x%X already in use.\n", iobase);
231	return NULL;
232	}
233
dd00cc48	234	sv = kzalloc(sizeof(struct sv11_device), GFP_KERNEL);
1da177e4 LT	235	if(!sv)
	236	goto fail3;
	237
1da177e4 LT	238	sv->if_ptr=&sv->netdev;
	239
	240	sv->netdev.dev = alloc_netdev(0, "hdlc%d", sv11_setup);
	241	if(!sv->netdev.dev)
	242	goto fail2;
	243
1da177e4 LT	244	dev=&sv->sync;
	245
	246	/*
	247	* Stuff in the I/O addressing
	248	*/
	249
	250	dev->active = 0;
	251
	252	dev->chanA.ctrlio=iobase+1;
	253	dev->chanA.dataio=iobase+3;
	254	dev->chanB.ctrlio=-1;
	255	dev->chanB.dataio=-1;
	256	dev->chanA.irqs=&z8530_nop;
	257	dev->chanB.irqs=&z8530_nop;
	258
	259	outb(0, iobase+4); /* DMA off */
	260
	261	/* We want a fast IRQ for this device. Actually we'd like an even faster
	262	IRQ ;) - This is one driver RtLinux is made for */
	263
1fb9df5d	264	if(request_irq(irq, &z8530_interrupt, IRQF_DISABLED, "Hostess SV11", dev)<0)
1da177e4 LT	265	{
	266	printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq);
	267	goto fail1;
	268	}
	269
	270	dev->irq=irq;
	271	dev->chanA.private=sv;
	272	dev->chanA.netdevice=sv->netdev.dev;
	273	dev->chanA.dev=dev;
	274	dev->chanB.dev=dev;
	275
	276	if(dma)
	277	{
	278	/*
	279	* You can have DMA off or 1 and 3 thats the lot
	280	* on the Comtrol.
	281	*/
	282	dev->chanA.txdma=3;
	283	dev->chanA.rxdma=1;
	284	outb(0x03\|0x08, iobase+4); /* DMA on */
	285	if(request_dma(dev->chanA.txdma, "Hostess SV/11 (TX)")!=0)
	286	goto fail;
	287
	288	if(dma==1)
	289	{
	290	if(request_dma(dev->chanA.rxdma, "Hostess SV/11 (RX)")!=0)
	291	goto dmafail;
	292	}
	293	}
	294
	295	/* Kill our private IRQ line the hostess can end up chattering
	296	until the configuration is set */
	297	disable_irq(irq);
	298
	299	/*
	300	* Begin normal initialise
	301	*/
	302
	303	if(z8530_init(dev)!=0)
	304	{
	305	printk(KERN_ERR "Z8530 series device not found.\n");
	306	enable_irq(irq);
	307	goto dmafail2;
	308	}
	309	z8530_channel_load(&dev->chanB, z8530_dead_port);
	310	if(dev->type==Z85C30)
	311	z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
	312	else
	313	z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
	314
	315	enable_irq(irq);
	316
	317
	318	/*
	319	* Now we can take the IRQ
	320	*/
	321	if(dev_alloc_name(dev->chanA.netdevice,"hdlc%d")>=0)
	322	{
	323	struct net_device *d=dev->chanA.netdevice;
	324
	325	/*
	326	* Initialise the PPP components
	327	*/
	328	sppp_attach(&sv->netdev);
329
330	/*
331	* Local fields
332	*/
333
334	d->base_addr = iobase;
335	d->irq = irq;
336	d->priv = sv;
337
338	if(register_netdev(d))
339	{
340	printk(KERN_ERR "%s: unable to register device.\n",
341	d->name);
342	sppp_detach(d);
343	goto dmafail2;
344	}
345
346	z8530_describe(dev, "I/O", iobase);
347	dev->active=1;
348	return sv;
349	}
350	dmafail2:
351	if(dma==1)
352	free_dma(dev->chanA.rxdma);
353	dmafail:
354	if(dma)
355	free_dma(dev->chanA.txdma);
356	fail:
357	free_irq(irq, dev);
358	fail1:
359	free_netdev(sv->netdev.dev);
360	fail2:
361	kfree(sv);
362	fail3:
363	release_region(iobase,8);
364	return NULL;
365	}
366
367	static void sv11_shutdown(struct sv11_device *dev)
368	{
369	sppp_detach(dev->netdev.dev);
370	unregister_netdev(dev->netdev.dev);
371	z8530_shutdown(&dev->sync);
372	free_irq(dev->sync.irq, dev);
373	if(dma)
374	{
375	if(dma==1)
376	free_dma(dev->sync.chanA.rxdma);
377	free_dma(dev->sync.chanA.txdma);
378	}
379	release_region(dev->sync.chanA.ctrlio-1, 8);
380	free_netdev(dev->netdev.dev);
381	kfree(dev);
382	}
383
384	#ifdef MODULE
385
386	static int io=0x200;
387	static int irq=9;
388
389	module_param(io, int, 0);
390	MODULE_PARM_DESC(io, "The I/O base of the Comtrol Hostess SV11 card");
391	module_param(dma, int, 0);
392	MODULE_PARM_DESC(dma, "Set this to 1 to use DMA1/DMA3 for TX/RX");
393	module_param(irq, int, 0);
394	MODULE_PARM_DESC(irq, "The interrupt line setting for the Comtrol Hostess SV11 card");
395
396	MODULE_AUTHOR("Alan Cox");
397	MODULE_LICENSE("GPL");
398	MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
399
400	static struct sv11_device *sv11_unit;
401
402	int init_module(void)
403	{
404	printk(KERN_INFO "SV-11 Z85230 Synchronous Driver v 0.03.\n");
405	printk(KERN_INFO "(c) Copyright 2001, Red Hat Inc.\n");
406	if((sv11_unit=sv11_init(io,irq))==NULL)
407	return -ENODEV;
408	return 0;
409	}
410
411	void cleanup_module(void)
412	{
413	if(sv11_unit)
414	sv11_shutdown(sv11_unit);
415	}
416
417	#endif
418