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net: pcs: xpcs: add support for sgmii with no inband AN

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In fixed-link use cases, the XPCS can disable the clause 37 in-band
autoneg process, disable the "Automatic Speed Mode Change after CL37 AN"
setting, and force operation in a speed dictated by management.

Add support for this operating mode.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vladimir Oltean 2021-06-11 23:05:23 +03:00 committed by David S. Miller
parent d4433d5b7b
commit 2031c09e6d
1 changed files with 38 additions and 3 deletions
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41
drivers/net/pcs/pcs-xpcs.c
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@ -690,7 +690,7 @@ int xpcs_config_eee(struct dw_xpcs *xpcs, int mult_fact_100ns, int enable)
}
EXPORT_SYMBOL_GPL(xpcs_config_eee);
static int xpcs_config_aneg_c37_sgmii(struct dw_xpcs *xpcs)
static int xpcs_config_aneg_c37_sgmii(struct dw_xpcs *xpcs, unsigned int mode)
{
int ret;
@ -726,7 +726,10 @@ static int xpcs_config_aneg_c37_sgmii(struct dw_xpcs *xpcs)
if (ret < 0)
return ret;
ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
if (phylink_autoneg_inband(mode))
ret |= DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
else
ret &= ~DW_VR_MII_DIG_CTRL1_MAC_AUTO_SW;
return xpcs_write(xpcs, MDIO_MMD_VEND2, DW_VR_MII_DIG_CTRL1, ret);
}
@ -772,7 +775,7 @@ static int xpcs_do_config(struct dw_xpcs *xpcs, phy_interface_t interface,
}
break;
case DW_AN_C37_SGMII:
ret = xpcs_config_aneg_c37_sgmii(xpcs);
ret = xpcs_config_aneg_c37_sgmii(xpcs, mode);
if (ret)
return ret;
break;
@ -905,6 +908,36 @@ static void xpcs_get_state(struct phylink_pcs *pcs,
}
}
static void xpcs_link_up_sgmii(struct dw_xpcs *xpcs, unsigned int mode,
int speed, int duplex)
{
int val, ret;
if (phylink_autoneg_inband(mode))
return;
switch (speed) {
case SPEED_1000:
val = BMCR_SPEED1000;
break;
case SPEED_100:
val = BMCR_SPEED100;
break;
case SPEED_10:
val = BMCR_SPEED10;
break;
default:
return;
}
if (duplex == DUPLEX_FULL)
val |= BMCR_FULLDPLX;
ret = xpcs_write(xpcs, MDIO_MMD_VEND2, MDIO_CTRL1, val);
if (ret)
pr_err("%s: xpcs_write returned %pe\n", __func__, ERR_PTR(ret));
}
static void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
phy_interface_t interface, int speed, int duplex)
{
@ -912,6 +945,8 @@ static void xpcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
if (interface == PHY_INTERFACE_MODE_USXGMII)
return xpcs_config_usxgmii(xpcs, speed);
if (interface == PHY_INTERFACE_MODE_SGMII)
return xpcs_link_up_sgmii(xpcs, mode, speed, duplex);
}
static u32 xpcs_get_id(struct dw_xpcs *xpcs)