[PATCH net-next v2 04/10] net: freescale: ucc_geth: Fix WOL configuration

[Maxime Chevallier]

The get/set_wol ethtool ops rely on querying the PHY for its WoL
capabilities, checking for the presence of a PHY and a PHY interrupts
isn't enough. Address that by cleaning up the WoL configuration
sequence.

Signed-off-by: Maxime Chevallier <maxime.chevall...@bootlin.com>
---
V2: Reworked the whole configuration sequence, and introduced an
internal attribute to store the PHY wol capabilities

 drivers/net/ethernet/freescale/ucc_geth.c     |  4 +--
 drivers/net/ethernet/freescale/ucc_geth.h     |  1 +
 .../net/ethernet/freescale/ucc_geth_ethtool.c | 36 +++++++++++++++----
 3 files changed, 32 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/freescale/ucc_geth.c 
b/drivers/net/ethernet/freescale/ucc_geth.c
index 13b8f8401c81..42254ee64a35 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -3413,11 +3413,11 @@ static int ucc_geth_suspend(struct platform_device 
*ofdev, pm_message_t state)
         */
        ugeth_disable(ugeth, COMM_DIR_RX_AND_TX);
 
-       if (ugeth->wol_en & WAKE_MAGIC) {
+       if (ugeth->wol_en & WAKE_MAGIC && !ugeth->phy_wol_en) {
                setbits32(ugeth->uccf->p_uccm, UCC_GETH_UCCE_MPD);
                setbits32(&ugeth->ug_regs->maccfg2, MACCFG2_MPE);
                ucc_fast_enable(ugeth->uccf, COMM_DIR_RX_AND_TX);
-       } else if (!(ugeth->wol_en & WAKE_PHY)) {
+       } else if (!ugeth->phy_wol_en) {
                phy_stop(ndev->phydev);
        }
 
diff --git a/drivers/net/ethernet/freescale/ucc_geth.h 
b/drivers/net/ethernet/freescale/ucc_geth.h
index c08a56b7c9fe..e08cfc8d8904 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.h
+++ b/drivers/net/ethernet/freescale/ucc_geth.h
@@ -1217,6 +1217,7 @@ struct ucc_geth_private {
        int oldduplex;
        int oldlink;
        int wol_en;
+       u32 phy_wol_en;
 
        struct device_node *node;
 };
diff --git a/drivers/net/ethernet/freescale/ucc_geth_ethtool.c 
b/drivers/net/ethernet/freescale/ucc_geth_ethtool.c
index fb5254d7d1ba..89b323ef8145 100644
--- a/drivers/net/ethernet/freescale/ucc_geth_ethtool.c
+++ b/drivers/net/ethernet/freescale/ucc_geth_ethtool.c
@@ -346,26 +346,48 @@ static void uec_get_wol(struct net_device *netdev, struct 
ethtool_wolinfo *wol)
        struct ucc_geth_private *ugeth = netdev_priv(netdev);
        struct phy_device *phydev = netdev->phydev;
 
-       if (phydev && phydev->irq)
-               wol->supported |= WAKE_PHY;
+       wol->supported = 0;
+       wol->wolopts = 0;
+
+       if (phydev)
+               phy_ethtool_get_wol(phydev, wol);
+
        if (qe_alive_during_sleep())
                wol->supported |= WAKE_MAGIC;
 
-       wol->wolopts = ugeth->wol_en;
+       wol->wolopts |= ugeth->wol_en;
 }
 
 static int uec_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
 {
        struct ucc_geth_private *ugeth = netdev_priv(netdev);
        struct phy_device *phydev = netdev->phydev;
+       int ret = 0;
 
-       if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
-               return -EINVAL;
-       else if (wol->wolopts & WAKE_PHY && (!phydev || !phydev->irq))
+       if (phydev) {
+               ret = phy_ethtool_set_wol(phydev, wol);
+               if (ret == -EOPNOTSUPP) {
+                       ugeth->phy_wol_en = 0;
+               } else if (ret) {
+                       return ret;
+               } else {
+                       ugeth->phy_wol_en = wol->wolopts;
+                       goto out;
+               }
+       }
+
+       /* If the PHY isn't handling the WoL and the MAC is asked to more than
+        * WAKE_MAGIC, error-out
+        */
+       if (!ugeth->phy_wol_en &&
+           wol->wolopts & ~WAKE_MAGIC)
                return -EINVAL;
-       else if (wol->wolopts & WAKE_MAGIC && !qe_alive_during_sleep())
+
+       if (wol->wolopts & WAKE_MAGIC &&
+           !qe_alive_during_sleep())
                return -EINVAL;
 
+out:
        ugeth->wol_en = wol->wolopts;
        device_set_wakeup_enable(&netdev->dev, ugeth->wol_en);
 
-- 
2.47.0