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net: xilinx_axi: check PCS/PMA PHY status in setup_phy

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Both PCS/PMA PHY and the external PHY need to have a valid link status
in order to have Ethernet traffic. Check and wait this status at
setup_phy() so that we could diagnose if there is a PHY issue.

Signed-off-by: Andy Chiu <andy.chiu@sifive.com>
Reviewed-by: Greentime Hu <greentime.hu@sifive.com>
Link: https://lore.kernel.org/r/20221101035800.912644-3-andy.chiu@sifive.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
This commit is contained in:
Andy Chiu 2022-11-01 11:58:00 +08:00 committed by Michal Simek
parent e23544cffe
commit f3558be91e
1 changed files with 44 additions and 0 deletions
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44
drivers/net/xilinx_axi_emac.c
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@ -342,6 +342,45 @@ static int axiemac_phy_init(struct udevice *dev)
return 0;
}
static int pcs_pma_startup(struct axidma_priv *priv)
{
u32 rc, retry_cnt = 0;
u16 mii_reg;
rc = phyread(priv, priv->pcsaddr, MII_BMCR, &mii_reg);
if (rc)
goto failed_mdio;
if (!(mii_reg & BMCR_ANENABLE)) {
mii_reg |= BMCR_ANENABLE;
if (phywrite(priv, priv->pcsaddr, MII_BMCR, mii_reg))
goto failed_mdio;
}
/*
* Check the internal PHY status and warn user if the link between it
* and the external PHY is not obtained.
*/
debug("axiemac: waiting for link status of the PCS/PMA PHY");
while (retry_cnt * 10 < PHY_ANEG_TIMEOUT) {
rc = phyread(priv, priv->pcsaddr, MII_BMSR, &mii_reg);
if ((mii_reg & BMSR_LSTATUS) && mii_reg != 0xffff && !rc) {
debug(".Done\n");
return 0;
}
if ((retry_cnt++ % 10) == 0)
debug(".");
mdelay(10);
}
debug("\n");
printf("axiemac: Warning, PCS/PMA PHY@%d is not ready, link is down\n",
priv->pcsaddr);
return 1;
failed_mdio:
printf("axiemac: MDIO to the PCS/PMA PHY has failed\n");
return 1;
}
/* Setting axi emac and phy to proper setting */
static int setup_phy(struct udevice *dev)
{
@ -373,6 +412,11 @@ static int setup_phy(struct udevice *dev)
phydev->dev->name);
return 0;
}
if (priv->interface == PHY_INTERFACE_MODE_SGMII ||
priv->interface == PHY_INTERFACE_MODE_1000BASEX) {
if (pcs_pma_startup(priv))
return 0;
}
if (!phydev->link) {
printf("%s: No link.\n", phydev->dev->name);
return 0;