net: configure DWMAC DMA by default AXI burst length
Board can define its own AXI burst length to improve DWMAC DMA performance.
v2-changes:
- Avoid write burst len register when the Macro is not defined.
v3-changes:
- Add axi_bus register member to struct eth_dma_regs.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index c03e935..7469e59 100644
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -258,6 +258,10 @@
writel(readl(&dma_p->opmode) | RXSTART | TXSTART, &dma_p->opmode);
+#ifdef CONFIG_DW_AXI_BURST_LEN
+ writel((CONFIG_DW_AXI_BURST_LEN & 0x1FF >> 1), &dma_p->axibus);
+#endif
+
/* Start up the PHY */
if (phy_startup(priv->phydev)) {
printf("Could not initialize PHY %s\n",
diff --git a/drivers/net/designware.h b/drivers/net/designware.h
index ce51102..49d900c 100644
--- a/drivers/net/designware.h
+++ b/drivers/net/designware.h
@@ -68,7 +68,9 @@
u32 status; /* 0x14 */
u32 opmode; /* 0x18 */
u32 intenable; /* 0x1c */
- u8 reserved[40];
+ u32 reserved1[2];
+ u32 axibus; /* 0x28 */
+ u32 reserved2[7];
u32 currhosttxdesc; /* 0x48 */
u32 currhostrxdesc; /* 0x4c */
u32 currhosttxbuffaddr; /* 0x50 */