3c59x: Add software timestamping

Added software timestamping ability. Tested with linuxptp and synchronized
clocks to an average of less than 200 microseconds on 10 megabit ethernet.

Tested on both Vortex and Boomerang models.

Signed-off-by: Matthew Whitehead <tedheadster@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c
index af24c3cf821582c56cefab0b592a3e5d3392f9bd..0f4241c6e97e7545eed585f445d1f3e01e436277 100644 (file)
--- a/drivers/net/ethernet/3com/3c59x.c
+++ b/drivers/net/ethernet/3com/3c59x.c
@@ -2079,10 +2079,12 @@ vortex_start_xmit(struct sk_buff *skb, struct net_device *dev)
                iowrite16(len, ioaddr + Wn7_MasterLen);
                spin_unlock_irq(&vp->window_lock);
                vp->tx_skb = skb;
+               skb_tx_timestamp(skb);
                iowrite16(StartDMADown, ioaddr + EL3_CMD);
                /* netif_wake_queue() will be called at the DMADone interrupt. */
        } else {
                /* ... and the packet rounded to a doubleword. */
+               skb_tx_timestamp(skb);
                iowrite32_rep(ioaddr + TX_FIFO, skb->data, (skb->len + 3) >> 2);
                dev_kfree_skb (skb);
                if (ioread16(ioaddr + TxFree) > 1536) {
@@ -2212,6 +2214,7 @@ boomerang_start_xmit(struct sk_buff *skb, struct net_device *dev)
                prev_entry->status &= cpu_to_le32(~TxIntrUploaded);
 #endif
        }
+       skb_tx_timestamp(skb);
        iowrite16(DownUnstall, ioaddr + EL3_CMD);
        spin_unlock_irqrestore(&vp->lock, flags);
        return NETDEV_TX_OK;
@@ -2986,6 +2989,7 @@ static const struct ethtool_ops vortex_ethtool_ops = {
        .nway_reset             = vortex_nway_reset,
        .get_wol                = vortex_get_wol,
        .set_wol                = vortex_set_wol,
+       .get_ts_info            = ethtool_op_get_ts_info,
 };
 
 #ifdef CONFIG_PCI