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ni52: clean up check586() 

take iscp-based testing into helper, kill the loop, stop
wanking with reassignments of priv->iscp

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Al Viro 2008-03-19 09:44:19 +00:00 committed by Jeff Garzik
parent 7f8cfd5608
commit 76af5699a3
1 changed files with 24 additions and 23 deletions
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47
drivers/net/ni52.c
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@ -294,21 +294,38 @@ static int ni52_open(struct net_device *dev)
return 0; /* most done by init */
}
static int check_iscp(struct net_device *dev, void __iomem *addr)
{
struct iscp_struct __iomem *iscp = addr;
struct priv *p = dev->priv;
memset_io(iscp, 0, sizeof(struct iscp_struct));
writel(make24(iscp), &p->scp->iscp);
writeb(1, &iscp->busy);
ni_reset586();
ni_attn586();
mdelay(32); /* wait a while... */
/* i82586 clears 'busy' after successful init */
if (readb(&iscp->busy))
return 0;
return 1;
}
/**********************************************
* Check to see if there's an 82586 out there.
*/
static int check586(struct net_device *dev, unsigned size)
{
unsigned long where = dev->mem_start;
struct priv *p = dev->priv;
char __iomem *iscp_addrs[2];
int i;
p->mapped = (char __iomem *)isa_bus_to_virt(where);
p->mapped = (char __iomem *)isa_bus_to_virt(dev->mem_start);
p->base = p->mapped + size - 0x01000000;
p->memtop = p->mapped + size;
p->scp = (struct scp_struct __iomem *)(p->base + SCP_DEFAULT_ADDRESS);
p->scb = (struct scb_struct __iomem *) p->mapped;
p->iscp = (struct iscp_struct __iomem *)p->scp - 1;
memset_io(p->scp, 0, sizeof(struct scp_struct));
for (i = 0; i < sizeof(struct scp_struct); i++)
/* memory was writeable? */
@ -318,26 +335,10 @@ static int check586(struct net_device *dev, unsigned size)
if (readb(&p->scp->sysbus) != SYSBUSVAL)
return 0;
iscp_addrs[0] = p->mapped;
iscp_addrs[1] = (char __iomem *)p->scp - sizeof(struct iscp_struct);
for (i = 0; i < 2; i++) {
p->iscp = (struct iscp_struct __iomem *) iscp_addrs[i];
memset_io(p->iscp, 0, sizeof(struct iscp_struct));
writel(make24(p->iscp), &p->scp->iscp);
writeb(1, &p->iscp->busy);
ni_reset586();
ni_attn586();
mdelay(32); /* wait a while... */
/* i82586 clears 'busy' after successful init */
if (readb(&p->iscp->busy))
return 0;
}
p->iscp = (struct iscp_struct __iomem *)
((char __iomem *)p->scp - sizeof(struct iscp_struct));
if (!check_iscp(dev, p->mapped))
return 0;
if (!check_iscp(dev, p->iscp))
return 0;
return 1;
}