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| author | Doug Berger <opendmb@gmail.com> | 2020-03-16 14:44:55 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-25 16:17:17 +0200 |
| commit | bf3ace5c10f4225de8f63355b2b495160314fc3b (patch) | |
| tree | cdcf570bbd2b5aa67bf7cdda0a6342f664f6f18e | |
| parent | 44f0418482797059da9690b0dae3a149db40ff9c (diff) | |
| download | linux-bf3ace5c10f4225de8f63355b2b495160314fc3b.tar.gz linux-bf3ace5c10f4225de8f63355b2b495160314fc3b.tar.bz2 linux-bf3ace5c10f4225de8f63355b2b495160314fc3b.zip | |
Revert "net: bcmgenet: use RGMII loopback for MAC reset"
commit 612eb1c3b9e504de24136c947ed7c07bc342f3aa upstream.
This reverts commit 3a55402c93877d291b0a612d25edb03d1b4b93ac.
This is not a good solution when connecting to an external switch
that may not support the isolation of the TXC signal resulting in
output driver contention on the pin.
A different solution is necessary.
Signed-off-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
[Adjusted to accommodate lack of commit 4f8d81b77e66]
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmgenet.c | 2 | ||||
| -rw-r--r-- | drivers/net/ethernet/broadcom/genet/bcmmii.c | 33 |
2 files changed, 2 insertions, 33 deletions
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c index 469cfc74617a..fe0a5fda481c 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c +++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c @@ -2015,6 +2015,8 @@ static void reset_umac(struct bcmgenet_priv *priv) /* issue soft reset with (rg)mii loopback to ensure a stable rxclk */ bcmgenet_umac_writel(priv, CMD_SW_RESET | CMD_LCL_LOOP_EN, UMAC_CMD); + udelay(2); + bcmgenet_umac_writel(priv, 0, UMAC_CMD); } static void bcmgenet_intr_disable(struct bcmgenet_priv *priv) diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c index 026f00ccaa0c..213434aaf07f 100644 --- a/drivers/net/ethernet/broadcom/genet/bcmmii.c +++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c @@ -187,38 +187,8 @@ int bcmgenet_mii_config(struct net_device *dev, bool init) const char *phy_name = NULL; u32 id_mode_dis = 0; u32 port_ctrl; - int bmcr = -1; - int ret; u32 reg; - /* MAC clocking workaround during reset of umac state machines */ - reg = bcmgenet_umac_readl(priv, UMAC_CMD); - if (reg & CMD_SW_RESET) { - /* An MII PHY must be isolated to prevent TXC contention */ - if (priv->phy_interface == PHY_INTERFACE_MODE_MII) { - ret = phy_read(phydev, MII_BMCR); - if (ret >= 0) { - bmcr = ret; - ret = phy_write(phydev, MII_BMCR, - bmcr | BMCR_ISOLATE); - } - if (ret) { - netdev_err(dev, "failed to isolate PHY\n"); - return ret; - } - } - /* Switch MAC clocking to RGMII generated clock */ - bcmgenet_sys_writel(priv, PORT_MODE_EXT_GPHY, SYS_PORT_CTRL); - /* Ensure 5 clks with Rx disabled - * followed by 5 clks with Reset asserted - */ - udelay(4); - reg &= ~(CMD_SW_RESET | CMD_LCL_LOOP_EN); - bcmgenet_umac_writel(priv, reg, UMAC_CMD); - /* Ensure 5 more clocks before Rx is enabled */ - udelay(2); - } - priv->ext_phy = !priv->internal_phy && (priv->phy_interface != PHY_INTERFACE_MODE_MOCA); @@ -250,9 +220,6 @@ int bcmgenet_mii_config(struct net_device *dev, bool init) phy_set_max_speed(phydev, SPEED_100); bcmgenet_sys_writel(priv, PORT_MODE_EXT_EPHY, SYS_PORT_CTRL); - /* Restore the MII PHY after isolation */ - if (bmcr >= 0) - phy_write(phydev, MII_BMCR, bmcr); break; case PHY_INTERFACE_MODE_REVMII: |