@@ -1038,6 +1038,7 @@ struct ravb_private {
unsigned wol_enabled:1;
unsigned rxcidm:1; /* RX Clock Internal Delay Mode */
unsigned txcidm:1; /* TX Clock Internal Delay Mode */
+ unsigned rgmii_override:1; /* Deprecated rgmii-*id behavior */
int num_tx_desc; /* TX descriptors per packet */
};
@@ -1034,11 +1034,8 @@ static int ravb_phy_init(struct net_device *ndev)
pn = of_node_get(np);
}
- iface = priv->phy_interface;
- if (priv->chip_id != RCAR_GEN2 && phy_interface_mode_is_rgmii(iface)) {
- /* ravb_set_delay_mode() takes care of internal delay mode */
- iface = PHY_INTERFACE_MODE_RGMII;
- }
+ iface = priv->rgmii_override ? PHY_INTERFACE_MODE_RGMII
+ : priv->phy_interface;
phydev = of_phy_connect(ndev, pn, ravb_adjust_link, 0, iface);
of_node_put(pn);
if (!phydev) {
@@ -1967,20 +1964,41 @@ static const struct soc_device_attribute ravb_delay_mode_quirk_match[] = {
};
/* Set tx and rx clock internal delay modes */
-static void ravb_parse_delay_mode(struct net_device *ndev)
+static void ravb_parse_delay_mode(struct device_node *np, struct net_device *ndev)
{
struct ravb_private *priv = netdev_priv(ndev);
+ bool explicit_delay = false;
+ u32 delay;
+
+ if (!of_property_read_u32(np, "rx-internal-delay-ps", &delay)) {
+ /* Valid values are 0 and 1800, according to DT bindings */
+ priv->rxcidm = !!delay;
+ explicit_delay = true;
+ }
+ if (!of_property_read_u32(np, "tx-internal-delay-ps", &delay)) {
+ /* Valid values are 0 and 2000, according to DT bindings */
+ priv->txcidm = !!delay;
+ explicit_delay = true;
+ }
+ if (explicit_delay)
+ return;
+
+ /* Fall back to legacy rgmii-*id behavior */
if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
- priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID)
+ priv->phy_interface == PHY_INTERFACE_MODE_RGMII_RXID) {
priv->rxcidm = 1;
+ priv->rgmii_override = 1;
+ }
if (priv->phy_interface == PHY_INTERFACE_MODE_RGMII_ID ||
priv->phy_interface == PHY_INTERFACE_MODE_RGMII_TXID) {
if (!WARN(soc_device_match(ravb_delay_mode_quirk_match),
"phy-mode %s requires TX clock internal delay mode which is not supported by this hardware revision. Please update device tree",
- phy_modes(priv->phy_interface)))
+ phy_modes(priv->phy_interface))) {
priv->txcidm = 1;
+ priv->rgmii_override = 1;
+ }
}
}
@@ -2126,7 +2144,7 @@ static int ravb_probe(struct platform_device *pdev)
ravb_modify(ndev, GCCR, GCCR_LTI, GCCR_LTI);
if (priv->chip_id != RCAR_GEN2) {
- ravb_parse_delay_mode(ndev);
+ ravb_parse_delay_mode(np, ndev);
ravb_set_delay_mode(ndev);
}
Some EtherAVB variants support internal clock delay configuration, which can add larger delays than the delays that are typically supported by the PHY (using an "rgmii-*id" PHY mode, and/or "[rt]xc-skew-ps" properties). Historically, the EtherAVB driver configured these delays based on the "rgmii-*id" PHY mode. This caused issues with PHY drivers that implement PHY internal delays properly[1]. Hence a backwards-compatible workaround was added by masking the PHY mode[2]. Add proper support for explicit configuration of the MAC internal clock delays using the new "[rt]x-internal-delay-ps" properties. Fall back to the old handling if none of these properties is present. [1] Commit bcf3440c6dd78bfe ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY") [2] Commit 9b23203c32ee02cd ("ravb: Mask PHY mode to avoid inserting delays twice"). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> --- v2: - Add Reviewed-by, - Split long line, - Replace "renesas,[rt]xc-delay-ps" by "[rt]x-internal-delay-ps", - Use 1 instead of true when assigning to a single-bit bitfield. --- drivers/net/ethernet/renesas/ravb.h | 1 + drivers/net/ethernet/renesas/ravb_main.c | 36 ++++++++++++++++++------ 2 files changed, 28 insertions(+), 9 deletions(-)