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realtek: enable SerDes NWAY and SGMII negotiation 

This allows copper SFPs to negotiate speeds lower than 1gig.

Acked-by: Birger Koblitz <mail@birger-koblitz.de>
Signed-off-by: Bjørn Mork <bjorn@mork.no>
This commit is contained in:
Bjørn Mork 2021-03-13 17:45:54 +01:00 committed by Petr Štetiar
parent 07bf5aaa4c
commit 963b2ae702
2 changed files with 42 additions and 3 deletions
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4
target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/common.c
View File

@ -368,8 +368,8 @@ static int __init rtl83xx_mdio_probe(struct rtl838x_switch_priv *priv)
/* Enable PHY control via SoC */
if (priv->family_id == RTL8380_FAMILY_ID) {
/* Enable PHY control via SoC */
sw_w32_mask(0, BIT(15), RTL838X_SMI_GLB_CTRL);
/* Enable SerDes NWAY and PHY control via SoC */
sw_w32_mask(BIT(7), BIT(15), RTL838X_SMI_GLB_CTRL);
} else {
/* Disable PHY polling via SoC */
sw_w32_mask(BIT(7), 0, RTL839X_SMI_GLB_CTRL);

41
target/linux/realtek/files-5.4/drivers/net/dsa/rtl83xx/dsa.c
View File

@ -344,6 +344,44 @@ static int rtl83xx_phylink_mac_link_state(struct dsa_switch *ds, int port,
return 1;
}
static void rtl83xx_config_interface(int port, phy_interface_t interface)
{
u32 old, int_shift, sds_shift;
switch (port) {
case 24:
int_shift = 0;
sds_shift = 5;
break;
case 26:
int_shift = 3;
sds_shift = 0;
break;
default:
return;
}
old = sw_r32(RTL838X_SDS_MODE_SEL);
switch (interface) {
case PHY_INTERFACE_MODE_1000BASEX:
if ((old >> sds_shift & 0x1f) == 4)
return;
sw_w32_mask(0x7 << int_shift, 1 << int_shift, RTL838X_INT_MODE_CTRL);
sw_w32_mask(0x1f << sds_shift, 4 << sds_shift, RTL838X_SDS_MODE_SEL);
break;
case PHY_INTERFACE_MODE_SGMII:
if ((old >> sds_shift & 0x1f) == 2)
return;
sw_w32_mask(0x7 << int_shift, 2 << int_shift, RTL838X_INT_MODE_CTRL);
sw_w32_mask(0x1f << sds_shift, 2 << sds_shift, RTL838X_SDS_MODE_SEL);
break;
default:
return;
}
pr_debug("configured port %d for interface %s\n", port, phy_modes(interface));
}
static void rtl83xx_phylink_mac_config(struct dsa_switch *ds, int port,
unsigned int mode,
const struct phylink_link_state *state)
@ -377,10 +415,11 @@ static void rtl83xx_phylink_mac_config(struct dsa_switch *ds, int port,
reg = sw_r32(priv->r->mac_force_mode_ctrl(port));
/* Auto-Negotiation does not work for MAC in RTL8390 */
if (priv->family_id == RTL8380_FAMILY_ID) {
if (mode == MLO_AN_PHY) {
if (mode == MLO_AN_PHY || phylink_autoneg_inband(mode)) {
pr_debug("PHY autonegotiates\n");
reg |= BIT(2);
sw_w32(reg, priv->r->mac_force_mode_ctrl(port));
rtl83xx_config_interface(port, state->interface);
return;
}
}