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WAN: Convert Zilog-based drivers to generic HDLC

Browse source 
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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4
drivers/net/wan/Kconfig
View file

@ -25,7 +25,7 @@ if WAN
# There is no way to detect a comtrol sv11 - force it modular for now.
config HOSTESS_SV11
tristate "Comtrol Hostess SV-11 support"
depends on ISA && m && ISA_DMA_API && INET
depends on ISA && m && ISA_DMA_API && INET && HDLC
help
Driver for Comtrol Hostess SV-11 network card which
operates on low speed synchronous serial links at up to
@ -88,7 +88,7 @@ config LANMEDIA
# There is no way to detect a Sealevel board. Force it modular
config SEALEVEL_4021
tristate "Sealevel Systems 4021 support"
depends on ISA && m && ISA_DMA_API && INET
depends on ISA && m && ISA_DMA_API && INET && HDLC
help
This is a driver for the Sealevel Systems ACB 56 serial I/O adapter.

6
drivers/net/wan/Makefile
View file

@ -21,11 +21,11 @@ pc300-y := pc300_drv.o
pc300-$(CONFIG_PC300_MLPPP) += pc300_tty.o
pc300-objs := $(pc300-y)
obj-$(CONFIG_HOSTESS_SV11) += z85230.o syncppp.o hostess_sv11.o
obj-$(CONFIG_SEALEVEL_4021) += z85230.o syncppp.o sealevel.o
obj-$(CONFIG_HOSTESS_SV11) += z85230.o hostess_sv11.o
obj-$(CONFIG_SEALEVEL_4021) += z85230.o sealevel.o
obj-$(CONFIG_COSA) += cosa.o
obj-$(CONFIG_FARSYNC) += farsync.o
obj-$(CONFIG_DSCC4) += dscc4.o
obj-$(CONFIG_DSCC4) += dscc4.o
obj-$(CONFIG_LANMEDIA) += syncppp.o
obj-$(CONFIG_X25_ASY) += x25_asy.o

380
drivers/net/wan/hostess_sv11.c
View file

@ -16,6 +16,8 @@
* touching control registers.
*
* Port B isnt wired (why - beats me)
*
* Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
*/
#include <linux/module.h>
@ -26,6 +28,7 @@
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/delay.h>
#include <linux/hdlc.h>
#include <linux/ioport.h>
#include <net/arp.h>
@ -33,34 +36,31 @@
#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
*/
static inline struct z8530_dev* dev_to_sv(struct net_device *dev)
{
return (struct z8530_dev *)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 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_trim(skb, skb->len - 2);
skb->protocol = hdlc_type_trans(skb, c->netdevice);
skb_reset_mac_header(skb);
skb->dev=c->netdevice;
skb->dev = c->netdevice;
/*
* Send it to the PPP layer. We don't have time to process
* it right now.
@ -68,56 +68,51 @@ static void hostess_input(struct z8530_channel *c, struct sk_buff *skb)
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->ml_priv;
struct z8530_dev *sv11 = dev_to_sv(d);
int err = -1;
/*
* Link layer up
*/
switch(dma)
{
switch (dma) {
case 0:
err=z8530_sync_open(d, &sv11->sync.chanA);
err = z8530_sync_open(d, &sv11->chanA);
break;
case 1:
err=z8530_sync_dma_open(d, &sv11->sync.chanA);
err = z8530_sync_dma_open(d, &sv11->chanA);
break;
case 2:
err=z8530_sync_txdma_open(d, &sv11->sync.chanA);
err = z8530_sync_txdma_open(d, &sv11->chanA);
break;
}
if(err)
if (err)
return err;
/*
* Begin PPP
*/
err=sppp_open(d);
if(err)
{
switch(dma)
{
err = hdlc_open(d);
if (err) {
switch (dma) {
case 0:
z8530_sync_close(d, &sv11->sync.chanA);
z8530_sync_close(d, &sv11->chanA);
break;
case 1:
z8530_sync_dma_close(d, &sv11->sync.chanA);
z8530_sync_dma_close(d, &sv11->chanA);
break;
case 2:
z8530_sync_txdma_close(d, &sv11->sync.chanA);
z8530_sync_txdma_close(d, &sv11->chanA);
break;
}
}
return err;
}
sv11->sync.chanA.rx_function=hostess_input;
sv11->chanA.rx_function = hostess_input;
/*
* Go go go
*/
@ -128,30 +123,24 @@ static int hostess_open(struct net_device *d)
static int hostess_close(struct net_device *d)
{
struct sv11_device *sv11=d->ml_priv;
struct z8530_dev *sv11 = dev_to_sv(d);
/*
* Discard new frames
*/
sv11->sync.chanA.rx_function=z8530_null_rx;
/*
* PPP off
*/
sppp_close(d);
/*
* Link layer down
*/
sv11->chanA.rx_function = z8530_null_rx;
hdlc_close(d);
netif_stop_queue(d);
switch(dma)
{
switch (dma) {
case 0:
z8530_sync_close(d, &sv11->sync.chanA);
z8530_sync_close(d, &sv11->chanA);
break;
case 1:
z8530_sync_dma_close(d, &sv11->sync.chanA);
z8530_sync_dma_close(d, &sv11->chanA);
break;
case 2:
z8530_sync_txdma_close(d, &sv11->sync.chanA);
z8530_sync_txdma_close(d, &sv11->chanA);
break;
}
return 0;
@ -159,232 +148,174 @@ static int hostess_close(struct net_device *d)
static int hostess_ioctl(struct net_device *d, struct ifreq *ifr, int cmd)
{
/* struct sv11_device *sv11=d->ml_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->ml_priv;
if(sv11)
return z8530_get_stats(&sv11->sync.chanA);
else
return NULL;
/* struct z8530_dev *sv11=dev_to_sv(d);
z8530_ioctl(d,&sv11->chanA,ifr,cmd) */
return hdlc_ioctl(d, ifr, cmd);
}
/*
* Passed PPP frames, fire them downwind.
* Passed network frames, fire them downwind.
*/
static int hostess_queue_xmit(struct sk_buff *skb, struct net_device *d)
{
struct sv11_device *sv11=d->ml_priv;
return z8530_queue_xmit(&sv11->sync.chanA, skb);
return z8530_queue_xmit(&dev_to_sv(d)->chanA, skb);
}
static int hostess_neigh_setup(struct neighbour *n)
static int hostess_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;
}
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;
if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
return 0;
return -EINVAL;
}
/*
* Description block for a Comtrol Hostess SV11 card
*/
static struct sv11_device *sv11_init(int iobase, int irq)
static struct z8530_dev *sv11_init(int iobase, int irq)
{
struct z8530_dev *dev;
struct sv11_device *sv;
struct z8530_dev *sv;
struct net_device *netdev;
/*
* 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);
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;
sv = kzalloc(sizeof(struct z8530_dev), GFP_KERNEL);
if (!sv)
goto err_kzalloc;
/*
* 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 */
sv->active = 0;
sv->chanA.ctrlio = iobase + 1;
sv->chanA.dataio = iobase + 3;
sv->chanB.ctrlio = -1;
sv->chanB.dataio = -1;
sv->chanA.irqs = &z8530_nop;
sv->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)
{
if (request_irq(irq, &z8530_interrupt, IRQF_DISABLED,
"Hostess SV11", sv) < 0) {
printk(KERN_WARNING "hostess: IRQ %d already in use.\n", irq);
goto fail1;
goto err_irq;
}
dev->irq=irq;
dev->chanA.private=sv;
dev->chanA.netdevice=sv->netdev.dev;
dev->chanA.dev=dev;
dev->chanB.dev=dev;
if(dma)
{
sv->irq = irq;
sv->chanA.private = sv;
sv->chanA.dev = sv;
sv->chanB.dev = sv;
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;
}
sv->chanA.txdma = 3;
sv->chanA.rxdma = 1;
outb(0x03 | 0x08, iobase + 4); /* DMA on */
if (request_dma(sv->chanA.txdma, "Hostess SV/11 (TX)"))
goto err_txdma;
if (dma == 1)
if (request_dma(sv->chanA.rxdma, "Hostess SV/11 (RX)"))
goto err_rxdma;
}
/* 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)
{
if (z8530_init(sv)) {
printk(KERN_ERR "Z8530 series device not found.\n");
enable_irq(irq);
goto dmafail2;
goto free_dma;
}
z8530_channel_load(&dev->chanB, z8530_dead_port);
if(dev->type==Z85C30)
z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream);
z8530_channel_load(&sv->chanB, z8530_dead_port);
if (sv->type == Z85C30)
z8530_channel_load(&sv->chanA, z8530_hdlc_kilostream);
else
z8530_channel_load(&dev->chanA, z8530_hdlc_kilostream_85230);
z8530_channel_load(&sv->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
*/
d->ml_priv = sv;
sppp_attach(&sv->netdev);
/*
* Local fields
*/
d->base_addr = iobase;
d->irq = irq;
if(register_netdev(d))
{
printk(KERN_ERR "%s: unable to register device.\n",
d->name);
sppp_detach(d);
goto dmafail2;
}
sv->chanA.netdevice = netdev = alloc_hdlcdev(sv);
if (!netdev)
goto free_dma;
z8530_describe(dev, "I/O", iobase);
dev->active=1;
return sv;
dev_to_hdlc(netdev)->attach = hostess_attach;
dev_to_hdlc(netdev)->xmit = hostess_queue_xmit;
netdev->open = hostess_open;
netdev->stop = hostess_close;
netdev->do_ioctl = hostess_ioctl;
netdev->base_addr = iobase;
netdev->irq = irq;
if (register_hdlc_device(netdev)) {
printk(KERN_ERR "hostess: unable to register HDLC device.\n");
free_netdev(netdev);
goto free_dma;
}
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:
z8530_describe(sv, "I/O", iobase);
sv->active = 1;
return sv;
free_dma:
if (dma == 1)
free_dma(sv->chanA.rxdma);
err_rxdma:
if (dma)
free_dma(sv->chanA.txdma);
err_txdma:
free_irq(irq, sv);
err_irq:
kfree(sv);
fail3:
release_region(iobase,8);
err_kzalloc:
release_region(iobase, 8);
return NULL;
}
static void sv11_shutdown(struct sv11_device *dev)
static void sv11_shutdown(struct z8530_dev *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);
unregister_hdlc_device(dev->chanA.netdevice);
z8530_shutdown(dev);
free_irq(dev->irq, dev);
if (dma) {
if (dma == 1)
free_dma(dev->chanA.rxdma);
free_dma(dev->chanA.txdma);
}
release_region(dev->sync.chanA.ctrlio-1, 8);
free_netdev(dev->netdev.dev);
release_region(dev->chanA.ctrlio - 1, 8);
free_netdev(dev->chanA.netdevice);
kfree(dev);
}
#ifdef MODULE
static int io=0x200;
static int irq=9;
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");
@ -397,22 +328,17 @@ MODULE_AUTHOR("Alan Cox");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Modular driver for the Comtrol Hostess SV11");
static struct sv11_device *sv11_unit;
static struct z8530_dev *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)
if ((sv11_unit = sv11_init(io, irq)) == NULL)
return -ENODEV;
return 0;
}
void cleanup_module(void)
{
if(sv11_unit)
if (sv11_unit)
sv11_shutdown(sv11_unit);
}
#endif

371
drivers/net/wan/sealevel.c
View file

@ -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;

193
drivers/net/wan/z85230.c
View file

@ -43,6 +43,7 @@
#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 <asm/dma.h>
@ -51,7 +52,6 @@
#define RT_UNLOCK
#include <linux/spinlock.h>
#include <net/syncppp.h>
#include "z85230.h"
@ -440,51 +440,46 @@ static void z8530_tx(struct z8530_channel *c)
* A status event occurred in PIO synchronous mode. There are several
* reasons the chip will bother us here. A transmit underrun means we
* failed to feed the chip fast enough and just broke a packet. A DCD
* change is a line up or down. We communicate that back to the protocol
* layer for synchronous PPP to renegotiate.
* change is a line up or down.
*/
static void z8530_status(struct z8530_channel *chan)
{
u8 status, altered;
status=read_zsreg(chan, R0);
altered=chan->status^status;
chan->status=status;
if(status&TxEOM)
{
status = read_zsreg(chan, R0);
altered = chan->status ^ status;
chan->status = status;
if (status & TxEOM) {
/* printk("%s: Tx underrun.\n", chan->dev->name); */
chan->stats.tx_fifo_errors++;
chan->netdevice->stats.tx_fifo_errors++;
write_zsctrl(chan, ERR_RES);
z8530_tx_done(chan);
}
if(altered&chan->dcdcheck)
if (altered & chan->dcdcheck)
{
if(status&chan->dcdcheck)
{
if (status & chan->dcdcheck) {
printk(KERN_INFO "%s: DCD raised\n", chan->dev->name);
write_zsreg(chan, R3, chan->regs[3]|RxENABLE);
if(chan->netdevice &&
((chan->netdevice->type == ARPHRD_HDLC) ||
(chan->netdevice->type == ARPHRD_PPP)))
sppp_reopen(chan->netdevice);
}
else
{
write_zsreg(chan, R3, chan->regs[3] | RxENABLE);
if (chan->netdevice)
netif_carrier_on(chan->netdevice);
} else {
printk(KERN_INFO "%s: DCD lost\n", chan->dev->name);
write_zsreg(chan, R3, chan->regs[3]&~RxENABLE);
write_zsreg(chan, R3, chan->regs[3] & ~RxENABLE);
z8530_flush_fifo(chan);
if (chan->netdevice)
netif_carrier_off(chan->netdevice);
}
}
}
write_zsctrl(chan, RES_EXT_INT);
write_zsctrl(chan, RES_H_IUS);
}
struct z8530_irqhandler z8530_sync=
struct z8530_irqhandler z8530_sync =
{
z8530_rx,
z8530_tx,
@ -556,8 +551,7 @@ static void z8530_dma_tx(struct z8530_channel *chan)
*
* A status event occurred on the Z8530. We receive these for two reasons
* when in DMA mode. Firstly if we finished a packet transfer we get one
* and kick the next packet out. Secondly we may see a DCD change and
* have to poke the protocol layer.
* and kick the next packet out. Secondly we may see a DCD change.
*
*/
@ -586,24 +580,21 @@ static void z8530_dma_status(struct z8530_channel *chan)
}
}
if(altered&chan->dcdcheck)
if (altered & chan->dcdcheck)
{
if(status&chan->dcdcheck)
{
if (status & chan->dcdcheck) {
printk(KERN_INFO "%s: DCD raised\n", chan->dev->name);
write_zsreg(chan, R3, chan->regs[3]|RxENABLE);
if(chan->netdevice &&
((chan->netdevice->type == ARPHRD_HDLC) ||
(chan->netdevice->type == ARPHRD_PPP)))
sppp_reopen(chan->netdevice);
}
else
{
write_zsreg(chan, R3, chan->regs[3] | RxENABLE);
if (chan->netdevice)
netif_carrier_on(chan->netdevice);
} else {
printk(KERN_INFO "%s:DCD lost\n", chan->dev->name);
write_zsreg(chan, R3, chan->regs[3]&~RxENABLE);
write_zsreg(chan, R3, chan->regs[3] & ~RxENABLE);
z8530_flush_fifo(chan);
if (chan->netdevice)
netif_carrier_off(chan->netdevice);
}
}
}
write_zsctrl(chan, RES_EXT_INT);
write_zsctrl(chan, RES_H_IUS);
@ -1459,10 +1450,10 @@ static void z8530_tx_begin(struct z8530_channel *c)
/*
* Check if we crapped out.
*/
if(get_dma_residue(c->txdma))
if (get_dma_residue(c->txdma))
{
c->stats.tx_dropped++;
c->stats.tx_fifo_errors++;
c->netdevice->stats.tx_dropped++;
c->netdevice->stats.tx_fifo_errors++;
}
release_dma_lock(flags);
}
@ -1534,21 +1525,21 @@ static void z8530_tx_begin(struct z8530_channel *c)
* packet. This code is fairly timing sensitive.
*
* Called with the register lock held.
*/
*/
static void z8530_tx_done(struct z8530_channel *c)
{
struct sk_buff *skb;
/* Actually this can happen.*/
if(c->tx_skb==NULL)
if (c->tx_skb == NULL)
return;
skb=c->tx_skb;
c->tx_skb=NULL;
skb = c->tx_skb;
c->tx_skb = NULL;
z8530_tx_begin(c);
c->stats.tx_packets++;
c->stats.tx_bytes+=skb->len;
c->netdevice->stats.tx_packets++;
c->netdevice->stats.tx_bytes += skb->len;
dev_kfree_skb_irq(skb);
}
@ -1558,7 +1549,7 @@ static void z8530_tx_done(struct z8530_channel *c)
* @skb: The buffer
*
* We point the receive handler at this function when idle. Instead
* of syncppp processing the frames we get to throw them away.
* of processing the frames we get to throw them away.
*/
void z8530_null_rx(struct z8530_channel *c, struct sk_buff *skb)
@ -1635,10 +1626,11 @@ static void z8530_rx_done(struct z8530_channel *c)
else
/* Can't occur as we dont reenable the DMA irq until
after the flip is done */
printk(KERN_WARNING "%s: DMA flip overrun!\n", c->netdevice->name);
printk(KERN_WARNING "%s: DMA flip overrun!\n",
c->netdevice->name);
release_dma_lock(flags);
/*
* Shove the old buffer into an sk_buff. We can't DMA
* directly into one on a PC - it might be above the 16Mb
@ -1646,27 +1638,23 @@ static void z8530_rx_done(struct z8530_channel *c)
* can avoid the copy. Optimisation 2 - make the memcpy
* a copychecksum.
*/
skb=dev_alloc_skb(ct);
if(skb==NULL)
{
c->stats.rx_dropped++;
printk(KERN_WARNING "%s: Memory squeeze.\n", c->netdevice->name);
}
else
{
skb = dev_alloc_skb(ct);
if (skb == NULL) {
c->netdevice->stats.rx_dropped++;
printk(KERN_WARNING "%s: Memory squeeze.\n",
c->netdevice->name);
} else {
skb_put(skb, ct);
skb_copy_to_linear_data(skb, rxb, ct);
c->stats.rx_packets++;
c->stats.rx_bytes+=ct;
c->netdevice->stats.rx_packets++;
c->netdevice->stats.rx_bytes += ct;
}
c->dma_ready=1;
}
else
{
RT_LOCK;
skb=c->skb;
c->dma_ready = 1;
} else {
RT_LOCK;
skb = c->skb;
/*
* The game we play for non DMA is similar. We want to
* get the controller set up for the next packet as fast
@ -1677,48 +1665,39 @@ static void z8530_rx_done(struct z8530_channel *c)
* if you build a system where the sync irq isnt blocked
* by the kernel IRQ disable then you need only block the
* sync IRQ for the RT_LOCK area.
*
*
*/
ct=c->count;
c->skb = c->skb2;
c->count = 0;
c->max = c->mtu;
if(c->skb)
{
if (c->skb) {
c->dptr = c->skb->data;
c->max = c->mtu;
}
else
{
c->count= 0;
} else {
c->count = 0;
c->max = 0;
}
RT_UNLOCK;
c->skb2 = dev_alloc_skb(c->mtu);
if(c->skb2==NULL)
if (c->skb2 == NULL)
printk(KERN_WARNING "%s: memory squeeze.\n",
c->netdevice->name);
c->netdevice->name);
else
{
skb_put(c->skb2,c->mtu);
}
c->stats.rx_packets++;
c->stats.rx_bytes+=ct;
skb_put(c->skb2, c->mtu);
c->netdevice->stats.rx_packets++;
c->netdevice->stats.rx_bytes += ct;
}
/*
* If we received a frame we must now process it.
*/
if(skb)
{
if (skb) {
skb_trim(skb, ct);
c->rx_function(c,skb);
}
else
{
c->stats.rx_dropped++;
c->rx_function(c, skb);
} else {
c->netdevice->stats.rx_dropped++;
printk(KERN_ERR "%s: Lost a frame\n", c->netdevice->name);
}
}
@ -1730,7 +1709,7 @@ static void z8530_rx_done(struct z8530_channel *c)
* Returns true if the buffer cross a DMA boundary on a PC. The poor
* thing can only DMA within a 64K block not across the edges of it.
*/
static inline int spans_boundary(struct sk_buff *skb)
{
unsigned long a=(unsigned long)skb->data;
@ -1799,24 +1778,6 @@ int z8530_queue_xmit(struct z8530_channel *c, struct sk_buff *skb)
EXPORT_SYMBOL(z8530_queue_xmit);
/**
* z8530_get_stats - Get network statistics
* @c: The channel to use
*
* Get the statistics block. We keep the statistics in software as
* the chip doesn't do it for us.
*
* Locking is ignored here - we could lock for a copy but its
* not likely to be that big an issue
*/
struct net_device_stats *z8530_get_stats(struct z8530_channel *c)
{
return &c->stats;
}
EXPORT_SYMBOL(z8530_get_stats);
/*
* Module support
*/

10
drivers/net/wan/z85230.h
View file

@ -325,7 +325,6 @@ struct z8530_channel
void *private; /* For our owner */
struct net_device *netdevice; /* Network layer device */
struct net_device_stats stats; /* Network layer statistics */
/*
* Async features
@ -366,13 +365,13 @@ struct z8530_channel
unsigned char tx_active; /* character is being xmitted */
unsigned char tx_stopped; /* output is suspended */
spinlock_t *lock; /* Devicr lock */
};
spinlock_t *lock; /* Device lock */
};
/*
* Each Z853x0 device.
*/
*/
struct z8530_dev
{
char *name; /* Device instance name */
@ -408,7 +407,6 @@ extern int z8530_sync_txdma_open(struct net_device *, struct z8530_channel *);
extern int z8530_sync_txdma_close(struct net_device *, struct z8530_channel *);
extern int z8530_channel_load(struct z8530_channel *, u8 *);
extern int z8530_queue_xmit(struct z8530_channel *c, struct sk_buff *skb);
extern struct net_device_stats *z8530_get_stats(struct z8530_channel *c);
extern void z8530_null_rx(struct z8530_channel *c, struct sk_buff *skb);