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WAN: Convert Zilog-based drivers to generic HDLC

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Signed-off-by: Krzysztof Hałasa <khc@pm.waw.pl>
This commit is contained in:
Krzysztof Hałasa
2008-07-02 17:47:52 +02:00
parent aca257530f
commit 52e8a6a2d8
6 changed files with 386 additions and 578 deletions
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371
drivers/net/wan/sealevel.c
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@ -8,6 +8,7 @@
*
* (c) Copyright 1999, 2001 Alan Cox
* (c) Copyright 2001 Red Hat Inc.
* Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
*
*/
@ -19,6 +20,7 @@
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
#include <linux/hdlc.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <net/arp.h>
@ -27,22 +29,19 @@
#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 slvl_device dev[2];
struct z8530_dev board;
int iobase;
};
@ -51,72 +50,69 @@ struct slvl_board
* Network driver support routines
*/
static inline struct slvl_device* dev_to_chan(struct net_device *dev)
{
return (struct slvl_device *)dev_to_hdlc(dev)->priv;
}
/*
* Frame receive. Simple for our card as we do sync ppp and there
* Frame receive. Simple for our card as we do HDLC 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_trim(skb, skb->len - 2);
skb->protocol = hdlc_type_trans(skb, c->netdevice);
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.
*/
skb->dev = c->netdevice;
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;
struct slvl_device *slvl = dev_to_chan(d);
int err = -1;
int unit = slvl->channel;
/*
* Link layer up.
* Link layer up.
*/
switch(unit)
switch (unit)
{
case 0:
err=z8530_sync_dma_open(d, slvl->chan);
err = z8530_sync_dma_open(d, slvl->chan);
break;
case 1:
err=z8530_sync_open(d, slvl->chan);
err = z8530_sync_open(d, slvl->chan);
break;
}
if(err)
if (err)
return err;
/*
* Begin PPP
*/
err=sppp_open(d);
if(err)
{
switch(unit)
{
err = hdlc_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;
slvl->chan->rx_function = sealevel_input;
/*
* Go go go
*/
@ -126,26 +122,19 @@ static int sealevel_open(struct net_device *d)
static int sealevel_close(struct net_device *d)
{
struct slvl_device *slvl=d->priv;
struct slvl_device *slvl = dev_to_chan(d);
int unit = slvl->channel;
/*
* Discard new frames
*/
slvl->chan->rx_function=z8530_null_rx;
/*
* PPP off
*/
sppp_close(d);
/*
* Link layer down
*/
slvl->chan->rx_function = z8530_null_rx;
hdlc_close(d);
netif_stop_queue(d);
switch(unit)
switch (unit)
{
case 0:
z8530_sync_dma_close(d, slvl->chan);
@ -159,210 +148,153 @@ static int sealevel_close(struct net_device *d)
static int sealevel_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
{
/* struct slvl_device *slvl=d->priv;
/* struct slvl_device *slvl=dev_to_chan(d);
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;
return hdlc_ioctl(d, ifr, cmd);
}
/*
* Passed PPP frames, fire them downwind.
* Passed network 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);
return z8530_queue_xmit(dev_to_chan(d)->chan, skb);
}
static int sealevel_neigh_setup(struct neighbour *n)
static int sealevel_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
if (n->nud_state == NUD_NONE) {
n->ops = &arp_broken_ops;
n->output = n->ops->output;
if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
return 0;
return -EINVAL;
}
static int slvl_setup(struct slvl_device *sv, int iobase, int irq)
{
struct net_device *dev = alloc_hdlcdev(sv);
if (!dev)
return -1;
dev_to_hdlc(dev)->attach = sealevel_attach;
dev_to_hdlc(dev)->xmit = sealevel_queue_xmit;
dev->open = sealevel_open;
dev->stop = sealevel_close;
dev->do_ioctl = sealevel_ioctl;
dev->base_addr = iobase;
dev->irq = irq;
if (register_hdlc_device(dev)) {
printk(KERN_ERR "sealevel: unable to register HDLC device\n");
free_netdev(dev);
return -1;
}
sv->chan->netdevice = dev;
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;
d->ml_priv = sv;
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,
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);
if (!request_region(iobase, 8, "Sealevel 4021")) {
printk(KERN_WARNING "sealevel: I/O 0x%X already in use.\n",
iobase);
return NULL;
}
b = kzalloc(sizeof(struct slvl_board), GFP_KERNEL);
if(!b)
goto fail3;
if (!b)
goto err_kzalloc;
if (!(b->dev[0]= slvl_alloc(iobase, irq)))
goto fail2;
b->dev[0].chan = &b->board.chanA;
b->dev[0].channel = 0;
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;
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)
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;
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);
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, IRQF_DISABLED, "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;
if (request_irq(irq, &z8530_interrupt, IRQF_DISABLED,
"SeaLevel", dev) < 0) {
printk(KERN_WARNING "sealevel: IRQ %d already in use.\n", irq);
goto err_request_irq;
}
dev->irq = irq;
dev->chanA.private = &b->dev[0];
dev->chanB.private = &b->dev[1];
dev->chanA.dev = dev;
dev->chanB.dev = dev;
dev->chanA.txdma = 3;
dev->chanA.rxdma = 1;
if (request_dma(dev->chanA.txdma, "SeaLevel (TX)"))
goto err_dma_tx;
if (request_dma(dev->chanA.rxdma, "SeaLevel (RX)"))
goto err_dma_rx;
disable_irq(irq);
/*
* Begin normal initialise
*/
if(z8530_init(dev)!=0)
{
if (z8530_init(dev) != 0) {
printk(KERN_ERR "Z8530 series device not found.\n");
enable_irq(irq);
goto dmafail2;
goto free_hw;
}
if(dev->type==Z85C30)
{
if (dev->type == Z85C30) {
z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream);
}
else
{
} else {
z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
z8530_channel_load(&dev->chanB, z8530_hdlc_kilostream_85230);
}
@ -370,36 +302,31 @@ static __init struct slvl_board *slvl_init(int iobase, int irq,
/*
* 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;
if (slvl_setup(&b->dev[0], iobase, irq))
goto free_hw;
if (slvl_setup(&b->dev[1], iobase, irq))
goto free_netdev0;
z8530_describe(dev, "I/O", iobase);
dev->active=1;
dev->active = 1;
return b;
fail_unit:
unregister_netdev(b->dev[0]->pppdev.dev);
dmafail2:
free_netdev0:
unregister_hdlc_device(b->dev[0].chan->netdevice);
free_netdev(b->dev[0].chan->netdevice);
free_hw:
free_dma(dev->chanA.rxdma);
dmafail:
err_dma_rx:
free_dma(dev->chanA.txdma);
fail:
err_dma_tx:
free_irq(irq, dev);
fail1_1:
free_netdev(b->dev[1]->pppdev.dev);
fail1_0:
free_netdev(b->dev[0]->pppdev.dev);
fail2:
err_request_irq:
kfree(b);
fail3:
release_region(iobase,8);
err_kzalloc:
release_region(iobase, 8);
return NULL;
}
@ -408,14 +335,14 @@ static void __exit slvl_shutdown(struct slvl_board *b)
int u;
z8530_shutdown(&b->board);
for(u=0; u<2; u++)
for (u = 0; u < 2; u++)
{
struct net_device *d = b->dev[u]->pppdev.dev;
unregister_netdev(d);
struct net_device *d = b->dev[u].chan->netdevice;
unregister_hdlc_device(d);
free_netdev(d);
}
free_irq(b->board.irq, &b->board);
free_dma(b->board.chanA.rxdma);
free_dma(b->board.chanA.txdma);
@ -451,10 +378,6 @@ 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;