diff options
| author |   Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> | 2018-05-18 21:31:28 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-05-19 23:24:46 -0400 |
| commit | 93f0fa75190fefee55408a1c0812fa54f576c61b (patch) | |
| tree | 8653a65e93dd5bb82360c13e4dc15ea9a8a0abee /drivers/net/ethernet/renesas/sh_eth.c | |
| parent | sh_eth: add RGMII support (diff) | |
| download | linux-dev-93f0fa75190fefee55408a1c0812fa54f576c61b.tar.xz linux-dev-93f0fa75190fefee55408a1c0812fa54f576c61b.zip | |
sh_eth: add EDMR.NBST support
The R-Car V3H (AKA R8A77980) GEther controller adds the DMA burst mode bit
(NBST) in EDMR and the manual tells to always set it before doing any DMA.
Based on the original (and large) patch by Vladimir Barinov.
Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/renesas/sh_eth.c')
| -rw-r--r-- | drivers/net/ethernet/renesas/sh_eth.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c index d214ec09d401..800c196510eb 100644 --- a/drivers/net/ethernet/renesas/sh_eth.c +++ b/drivers/net/ethernet/renesas/sh_eth.c @@ -1434,6 +1434,10 @@ static int sh_eth_dev_init(struct net_device *ndev) sh_eth_write(ndev, mdp->cd->trscer_err_mask, TRSCER); + /* DMA transfer burst mode */ + if (mdp->cd->nbst) + sh_eth_modify(ndev, EDMR, EDMR_NBST, EDMR_NBST); + if (mdp->cd->bculr) sh_eth_write(ndev, 0x800, BCULR); /* Burst sycle set */ |