net: designware: set the PS bit when resetting DMA bus in MII configuration

[u-boot] / drivers / net / designware.c

diff --git a/drivers/net/designware.c b/drivers/net/designware.c
index cf125210d88cb66d50252a9fa3023b71a96051c0..10a87096b72c4a1a02a62f09a1298cb393329ca5 100644 (file)
--- a/drivers/net/designware.c
+++ b/drivers/net/designware.c
@@ -280,6 +280,15 @@ int designware_eth_init(struct dw_eth_dev *priv, u8 *enetaddr)
 
        writel(readl(&dma_p->busmode) | DMAMAC_SRST, &dma_p->busmode);
 
+       /*
+        * When a MII PHY is used, we must set the PS bit for the DMA
+        * reset to succeed.
+        */
+       if (priv->phydev->interface == PHY_INTERFACE_MODE_MII)
+               writel(readl(&mac_p->conf) | MII_PORTSELECT, &mac_p->conf);
+       else
+               writel(readl(&mac_p->conf) & ~MII_PORTSELECT, &mac_p->conf);
+
        start = get_timer(0);
        while (readl(&dma_p->busmode) & DMAMAC_SRST) {
                if (get_timer(start) >= CONFIG_MACRESET_TIMEOUT) {