/*
* 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);
