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path: root/drivers/net/ethernet/synopsys
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Diffstat (limited to 'drivers/net/ethernet/synopsys')
-rw-r--r--drivers/net/ethernet/synopsys/dwc_eth_qos.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/net/ethernet/synopsys/dwc_eth_qos.c b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
index 6897c1d0f86e..af11ed1e0bcc 100644
--- a/drivers/net/ethernet/synopsys/dwc_eth_qos.c
+++ b/drivers/net/ethernet/synopsys/dwc_eth_qos.c
@@ -650,6 +650,11 @@ struct net_local {
u32 mmc_tx_counters_mask;
struct dwceqos_flowcontrol flowcontrol;
+
+ /* Tracks the intermediate state of phy started but hardware
+ * init not finished yet.
+ */
+ bool phy_defer;
};
static void dwceqos_read_mmc_counters(struct net_local *lp, u32 rx_mask,
@@ -901,6 +906,9 @@ static void dwceqos_adjust_link(struct net_device *ndev)
struct phy_device *phydev = lp->phy_dev;
int status_change = 0;
+ if (lp->phy_defer)
+ return;
+
if (phydev->link) {
if ((lp->speed != phydev->speed) ||
(lp->duplex != phydev->duplex)) {
@@ -1635,6 +1643,12 @@ static void dwceqos_init_hw(struct net_local *lp)
regval = dwceqos_read(lp, REG_DWCEQOS_MAC_CFG);
dwceqos_write(lp, REG_DWCEQOS_MAC_CFG,
regval | DWCEQOS_MAC_CFG_TE | DWCEQOS_MAC_CFG_RE);
+
+ lp->phy_defer = false;
+ mutex_lock(&lp->phy_dev->lock);
+ phy_read_status(lp->phy_dev);
+ dwceqos_adjust_link(lp->ndev);
+ mutex_unlock(&lp->phy_dev->lock);
}
static void dwceqos_tx_reclaim(unsigned long data)
@@ -1880,9 +1894,13 @@ static int dwceqos_open(struct net_device *ndev)
}
netdev_reset_queue(ndev);
+ /* The dwceqos reset state machine requires all phy clocks to complete,
+ * hence the unusual init order with phy_start first.
+ */
+ lp->phy_defer = true;
+ phy_start(lp->phy_dev);
dwceqos_init_hw(lp);
napi_enable(&lp->napi);
- phy_start(lp->phy_dev);
netif_start_queue(ndev);
tasklet_enable(&lp->tx_bdreclaim_tasklet);
@@ -1915,8 +1933,6 @@ static int dwceqos_stop(struct net_device *ndev)
{
struct net_local *lp = netdev_priv(ndev);
- phy_stop(lp->phy_dev);
-
tasklet_disable(&lp->tx_bdreclaim_tasklet);
napi_disable(&lp->napi);
@@ -1927,6 +1943,7 @@ static int dwceqos_stop(struct net_device *ndev)
dwceqos_drain_dma(lp);
dwceqos_reset_hw(lp);
+ phy_stop(lp->phy_dev);
dwceqos_descriptor_free(lp);