diff options
Diffstat (limited to 'drivers/net/pcnet.c')
| -rw-r--r-- | drivers/net/pcnet.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/pcnet.c b/drivers/net/pcnet.c index 7b8766028..5b248bee4 100644 --- a/drivers/net/pcnet.c +++ b/drivers/net/pcnet.c @@ -312,6 +312,21 @@ static int pcnet_init(struct eth_device *dev, bd_t *bis) pcnet_write_bcr(dev, 32, val); /* + * Enable NOUFLO on supported controllers, with the transmit + * start point set to the full packet. This will cause entire + * packets to be buffered by the ethernet controller before + * transmission, eliminating underflows which are common on + * slower devices. Controllers which do not support NOUFLO will + * simply be left with a larger transmit FIFO threshold. + */ + val = pcnet_read_bcr(dev, 18); + val |= 1 << 11; + pcnet_write_bcr(dev, 18, val); + val = pcnet_read_csr(dev, 80); + val |= 0x3 << 10; + pcnet_write_csr(dev, 80, val); + + /* * We only maintain one structure because the drivers will never * be used concurrently. In 32bit mode the RX and TX ring entries * must be aligned on 16-byte boundaries. |