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stmmac: intel: add pcs-xpcs for Intel mGbE controller

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Intel mGbE controller such as those in EHL & TGL uses pcs-xpcs driver for
SGMII interface. To ensure mdio bus scanning does not assign phy_device
to MDIO-addressable entities like intel serdes and pcs-xpcs, we set up
to phy_mask to skip them.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ong Boon Leong 2021-03-15 13:27:11 +08:00 committed by David S. Miller
parent c62808e810
commit 7310fe538e
1 changed files with 14 additions and 1 deletions
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15
drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
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@ -9,6 +9,9 @@
#include "dwmac4.h" #include "dwmac4.h"
#include "stmmac.h" #include "stmmac.h"
#define INTEL_MGBE_ADHOC_ADDR 0x15
#define INTEL_MGBE_XPCS_ADDR 0x16
struct intel_priv_data { struct intel_priv_data {
int mdio_adhoc_addr; /* mdio address for serdes & etc */ int mdio_adhoc_addr; /* mdio address for serdes & etc */
}; };
@ -333,6 +336,16 @@ static int intel_mgbe_common_data(struct pci_dev *pdev,
/* Use the last Rx queue */ /* Use the last Rx queue */
plat->vlan_fail_q = plat->rx_queues_to_use - 1; plat->vlan_fail_q = plat->rx_queues_to_use - 1;
/* Intel mgbe SGMII interface uses pcs-xcps */
if (plat->phy_interface == PHY_INTERFACE_MODE_SGMII) {
plat->mdio_bus_data->has_xpcs = true;
plat->mdio_bus_data->xpcs_an_inband = true;
}
/* Ensure mdio bus scan skips intel serdes and pcs-xpcs */
plat->mdio_bus_data->phy_mask = 1 << INTEL_MGBE_ADHOC_ADDR;
plat->mdio_bus_data->phy_mask |= 1 << INTEL_MGBE_XPCS_ADDR;
return 0; return 0;
} }
@ -664,7 +677,7 @@ static int intel_eth_pci_probe(struct pci_dev *pdev,
pci_set_master(pdev); pci_set_master(pdev);
plat->bsp_priv = intel_priv; plat->bsp_priv = intel_priv;
intel_priv->mdio_adhoc_addr = 0x15; intel_priv->mdio_adhoc_addr = INTEL_MGBE_ADHOC_ADDR;
ret = info->setup(pdev, plat); ret = info->setup(pdev, plat);
if (ret) if (ret)