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forcedeth: preserve registers 

Various registers need to be preserved before resetting the device.

Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Ayaz Abdulla 2008-02-04 15:14:09 -05:00 committed by Jeff Garzik
parent eb79842838
commit 4e84f9b104
1 changed files with 14 additions and 0 deletions
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14
drivers/net/forcedeth.c
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@ -1435,16 +1435,30 @@ static void nv_mac_reset(struct net_device *dev)
{
struct fe_priv *np = netdev_priv(dev);
u8 __iomem *base = get_hwbase(dev);
u32 temp1, temp2, temp3;
dprintk(KERN_DEBUG "%s: nv_mac_reset\n", dev->name);
writel(NVREG_TXRXCTL_BIT2 | NVREG_TXRXCTL_RESET | np->txrxctl_bits, base + NvRegTxRxControl);
pci_push(base);
/* save registers since they will be cleared on reset */
temp1 = readl(base + NvRegMacAddrA);
temp2 = readl(base + NvRegMacAddrB);
temp3 = readl(base + NvRegTransmitPoll);
writel(NVREG_MAC_RESET_ASSERT, base + NvRegMacReset);
pci_push(base);
udelay(NV_MAC_RESET_DELAY);
writel(0, base + NvRegMacReset);
pci_push(base);
udelay(NV_MAC_RESET_DELAY);
/* restore saved registers */
writel(temp1, base + NvRegMacAddrA);
writel(temp2, base + NvRegMacAddrB);
writel(temp3, base + NvRegTransmitPoll);
writel(NVREG_TXRXCTL_BIT2 | np->txrxctl_bits, base + NvRegTxRxControl);
pci_push(base);
}