/* This function is provided to cope with the possible failures of this phy
* during aneg process. When aneg fails, the PHY reports that aneg is done
* but the value found in MII_LPA is wrong:
* - Early failures: MII_LPA is just 0x0001. if MII_EXPANSION reports that
* the link partner (LP) supports aneg but the LP never acked our base
* code word, it is likely that we never sent it to begin with.
* - Late failures: MII_LPA is filled with a value which seems to make sense
* but it actually is not what the LP is advertising. It seems that we
* can detect this using a magic bit in the WOL bank (reg 12 - bit 12).
* If this particular bit is not set when aneg is reported being done,
* it means MII_LPA is likely to be wrong.
*
* In both case, forcing a restart of the aneg process solve the problem.
* When this failure happens, the first retry is usually successful but,
* in some cases, it may take up to 6 retries to get a decent result
*/
static int meson_gxl_read_status(struct phy_device *phydev)
{
int ret, wol, lpa, exp;
if (phydev->autoneg == AUTONEG_ENABLE) {
ret = genphy_aneg_done(phydev);
if (ret < 0)
return ret;
else if (!ret)
goto read_status_continue;
/* Aneg is done, let's check everything is fine */
wol = meson_gxl_read_reg(phydev, BANK_WOL, LPI_STATUS);
if (wol < 0)
return wol;
lpa = phy_read(phydev, MII_LPA);
if (lpa < 0)
return lpa;
exp = phy_read(phydev, MII_EXPANSION);
if (exp < 0)
return exp;
if (!(wol & LPI_STATUS_RSV12) ||
((exp & EXPANSION_NWAY) && !(lpa & LPA_LPACK))) {
/* Looks like aneg failed after all */
phydev_dbg(phydev, "LPA corruption - aneg restart\n");
return genphy_restart_aneg(phydev);
}
}
read_status_continue:
return genphy_read_status(phydev);
}
static void at803x_link_change_notify(struct phy_device *phydev)
{
struct at803x_priv *priv = phydev->priv;
/*
* Conduct a hardware reset for AT8030 every time a link loss is
* signalled. This is necessary to circumvent a hardware bug that
* occurs when the cable is unplugged while TX packets are pending
* in the FIFO. In such cases, the FIFO enters an error mode it
* cannot recover from by software.
*/
if (phydev->drv->phy_id == ATH8030_PHY_ID) {
if (phydev->state == PHY_NOLINK) {
if (priv->gpiod_reset && !priv->phy_reset) {
struct at803x_context context;
at803x_context_save(phydev, &context);
gpiod_set_value(priv->gpiod_reset, 0);
msleep(1);
gpiod_set_value(priv->gpiod_reset, 1);
msleep(1);
at803x_context_restore(phydev, &context);
phydev_dbg(phydev, "%s(): phy was reset\n",
__func__);
priv->phy_reset = true;
}
} else {
priv->phy_reset = false;
}
}
}
static void aqr107_link_change_notify(struct phy_device *phydev)
{
u8 fw_major, fw_minor;
bool downshift, short_reach, afr;
int mode, val;
if (phydev->state != PHY_RUNNING || phydev->autoneg == AUTONEG_DISABLE)
return;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_RX_LP_STAT1);
/* call failed or link partner is no Aquantia PHY */
if (val < 0 || !(val & MDIO_AN_RX_LP_STAT1_AQ_PHY))
return;
short_reach = val & MDIO_AN_RX_LP_STAT1_SHORT_REACH;
downshift = val & MDIO_AN_RX_LP_STAT1_AQRATE_DOWNSHIFT;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_RX_LP_STAT4);
if (val < 0)
return;
fw_major = FIELD_GET(MDIO_AN_RX_LP_STAT4_FW_MAJOR, val);
fw_minor = FIELD_GET(MDIO_AN_RX_LP_STAT4_FW_MINOR, val);
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_RX_VEND_STAT3);
if (val < 0)
return;
afr = val & MDIO_AN_RX_VEND_STAT3_AFR;
phydev_dbg(phydev, "Link partner is Aquantia PHY, FW %u.%u%s%s%s\n",
fw_major, fw_minor,
short_reach ? ", short reach mode" : "",
downshift ? ", fast-retrain downshift advertised" : "",
afr ? ", fast reframe advertised" : "");
val = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_GLOBAL_RSVD_STAT9);
if (val < 0)
return;
mode = FIELD_GET(VEND1_GLOBAL_RSVD_STAT9_MODE, val);
if (mode == VEND1_GLOBAL_RSVD_STAT9_1000BT2)
phydev_info(phydev, "Aquantia 1000Base-T2 mode active\n");
}
static void aqr107_chip_info(struct phy_device *phydev)
{
u8 fw_major, fw_minor, build_id, prov_id;
int val;
val = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_GLOBAL_FW_ID);
if (val < 0)
return;
fw_major = FIELD_GET(VEND1_GLOBAL_FW_ID_MAJOR, val);
fw_minor = FIELD_GET(VEND1_GLOBAL_FW_ID_MINOR, val);
val = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_GLOBAL_RSVD_STAT1);
if (val < 0)
return;
build_id = FIELD_GET(VEND1_GLOBAL_RSVD_STAT1_FW_BUILD_ID, val);
prov_id = FIELD_GET(VEND1_GLOBAL_RSVD_STAT1_PROV_ID, val);
phydev_dbg(phydev, "FW %u.%u, Build %u, Provisioning %u\n",
fw_major, fw_minor, build_id, prov_id);
}
