From patchwork Mon Oct 1 10:02:29 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [10/19] UBUNTU: SAUCE: net: calxedaxgmac: enable operate on 2nd frame mode Date: Mon, 01 Oct 2012 00:02:29 -0000 From: Ike Panhc X-Patchwork-Id: 188260 Message-Id: <1349085749-23435-1-git-send-email-ike.pan@canonical.com> To: kernel-team@lists.ubuntu.com From: Rob Herring BugLink: http://launchpad.net/bugs/1059432 Enable the tx dma to start reading the next frame while sending the current frame. Signed-off-by: Rob Herring Signed-off-by: Ike Panhc --- drivers/net/ethernet/calxeda/xgmac.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/calxeda/xgmac.c b/drivers/net/ethernet/calxeda/xgmac.c index cd64c6b..5b3e4f5 100644 --- a/drivers/net/ethernet/calxeda/xgmac.c +++ b/drivers/net/ethernet/calxeda/xgmac.c @@ -191,6 +191,7 @@ #define DMA_CONTROL_ST 0x00002000 /* Start/Stop Transmission */ #define DMA_CONTROL_SR 0x00000002 /* Start/Stop Receive */ #define DMA_CONTROL_DFF 0x01000000 /* Disable flush of rx frames */ +#define DMA_CONTROL_OSF 0x00000004 /* Operate on 2nd tx frame */ /* DMA Normal interrupt */ #define DMA_INTR_ENA_NIE 0x00010000 /* Normal Summary */ @@ -978,8 +979,7 @@ static int xgmac_hw_init(struct net_device *dev) ctrl |= XGMAC_CONTROL_IPC; writel(ctrl, ioaddr + XGMAC_CONTROL); - value = DMA_CONTROL_DFF; - writel(value, ioaddr + XGMAC_DMA_CONTROL); + writel(DMA_CONTROL_DFF | DMA_CONTROL_OSF, ioaddr + XGMAC_DMA_CONTROL); /* Set the HW DMA mode and the COE */ writel(XGMAC_OMR_TSF | XGMAC_OMR_RFD | XGMAC_OMR_RFA |