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authorAyaz Abdulla <aabdulla@nvidia.com>2008-02-04 15:14:09 -0500
committerJeff Garzik <jeff@garzik.org>2008-02-06 06:42:02 -0500
commit4e84f9b10461ad3c869ced4373dd85771dd67d20 (patch)
treef5ef2a69b4c04743f9dbc2dafad9fb94e6a4766c /drivers/net/forcedeth.c
parenteb79842838b6a3860d70be404fbb6e3b8f2a65de (diff)
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>
Diffstat (limited to 'drivers/net/forcedeth.c')
-rw-r--r--drivers/net/forcedeth.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c
index 6d5cd94f33ae..d4843d014bc9 100644
--- a/drivers/net/forcedeth.c
+++ b/drivers/net/forcedeth.c
@@ -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);
}