Patchwork [10/19] UBUNTU: SAUCE: net: calxedaxgmac: enable operate on 2nd frame mode

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Submitter Ike Panhc
Date Oct. 1, 2012, 10:02 a.m.
Message ID <1349085749-23435-1-git-send-email-ike.pan@canonical.com>
Download mbox | patch
Permalink /patch/188260/
State New
Headers show

Comments

Ike Panhc - Oct. 1, 2012, 10:02 a.m.
From: Rob Herring <rob.herring@calxeda.com>

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 <rob.herring@calxeda.com>
Signed-off-by: Ike Panhc <ike.pan@canonical.com>
---
 drivers/net/ethernet/calxeda/xgmac.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Patch

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 |