net/fec: enable flow control and length check on enet-mac

Also optimize not to reread the value written to FEC_R_CNTRL.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/drivers/net/fec.c b/drivers/net/fec.c
index c322971..74798be 100644 (file)
--- a/drivers/net/fec.c
+++ b/drivers/net/fec.c
@@ -339,7 +339,8 @@ fec_restart(struct net_device *ndev, int duplex)
        const struct platform_device_id *id_entry =
                                platform_get_device_id(fep->pdev);
        int i;
-       u32 val, temp_mac[2];
+       u32 temp_mac[2];
+       u32 rcntl = OPT_FRAME_SIZE | 0x04;
 
        /* Whack a reset.  We should wait for this. */
        writel(1, fep->hwp + FEC_ECNTRL);
@@ -388,14 +389,14 @@ fec_restart(struct net_device *ndev, int duplex)
 
        /* Enable MII mode */
        if (duplex) {
-               /* MII enable / FD enable */
-               writel(OPT_FRAME_SIZE | 0x04, fep->hwp + FEC_R_CNTRL);
+               /* FD enable */
                writel(0x04, fep->hwp + FEC_X_CNTRL);
        } else {
-               /* MII enable / No Rcv on Xmit */
-               writel(OPT_FRAME_SIZE | 0x06, fep->hwp + FEC_R_CNTRL);
+               /* No Rcv on Xmit */
+               rcntl |= 0x02;
                writel(0x0, fep->hwp + FEC_X_CNTRL);
        }
+
        fep->full_duplex = duplex;
 
        /* Set MII speed */
@@ -406,21 +407,21 @@ fec_restart(struct net_device *ndev, int duplex)
         * differently on enet-mac.
         */
        if (id_entry->driver_data & FEC_QUIRK_ENET_MAC) {
-               val = readl(fep->hwp + FEC_R_CNTRL);
+               /* Enable flow control and length check */
+               rcntl |= 0x40000000 | 0x00000020;
 
                /* MII or RMII */
                if (fep->phy_interface == PHY_INTERFACE_MODE_RMII)
-                       val |= (1 << 8);
+                       rcntl |= (1 << 8);
                else
-                       val &= ~(1 << 8);
+                       rcntl &= ~(1 << 8);
 
                /* 10M or 100M */
                if (fep->phy_dev && fep->phy_dev->speed == SPEED_100)
-                       val &= ~(1 << 9);
+                       rcntl &= ~(1 << 9);
                else
-                       val |= (1 << 9);
+                       rcntl |= (1 << 9);
 
-               writel(val, fep->hwp + FEC_R_CNTRL);
        } else {
 #ifdef FEC_MIIGSK_ENR
                if (fep->phy_interface == PHY_INTERFACE_MODE_RMII) {
@@ -440,6 +441,7 @@ fec_restart(struct net_device *ndev, int duplex)
                }
 #endif
        }
+       writel(rcntl, fep->hwp + FEC_R_CNTRL);
 
        /* And last, enable the transmit and receive processing */
        writel(2, fep->hwp + FEC_ECNTRL);