The Prolabs GLC-GE-100FX-C SFP module is a 100BaseFX module that plugs
into a Cisco SGMII capable cage, thus allowing to use 100M fiber on ports
that would usually only support SGMII and 1000BaseX.
This module contains a Broadcom BCM5461 PHY, but fails to properly indicate
support for e.100_fx mode.
The FS SFP-GE-100FX-C is a similar module, but this one does have the
e.100_fx bit set.
Add a quirk and fixup for these modules, to have a consistent linkmode
set, and make sure we use SGMII as the PHY interface.
The Prolabs module absolutely needs single-byte mdio accesses, otherwise
it freezes the i2c bus.
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
---
drivers/net/phy/sfp.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index bff91735f681..fb12616a67c1 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -481,6 +481,23 @@ static void sfp_quirk_ubnt_uf_instant(const struct sfp_eeprom_id *id,
caps->link_modes);
}
+static void sfp_fixup_sgmii_100fx(struct sfp *sfp)
+{
+ sfp->mdio_protocol = MDIO_I2C_SINGLE_BYTE_C22;
+ sfp->module_t_wait = msecs_to_jiffies(500);
+}
+
+static void sfp_quirk_sgmii_100fx(const struct sfp_eeprom_id *id,
+ struct sfp_module_caps *caps)
+{
+ /* Prolabs GLC-GE-100FX-C SGMII to 100FX module doesn't set the
+ * base.e100_base_fx bit.
+ */
+ linkmode_set_bit(ETHTOOL_LINK_MODE_100baseFX_Full_BIT,
+ caps->link_modes);
+ __set_bit(PHY_INTERFACE_MODE_SGMII, caps->interfaces);
+}
+
#define SFP_QUIRK(_v, _p, _s, _f) \
{ .vendor = _v, .part = _p, .support = _s, .fixup = _f, }
#define SFP_QUIRK_S(_v, _p, _s) SFP_QUIRK(_v, _p, _s, NULL)
@@ -553,6 +570,11 @@ static const struct sfp_quirk sfp_quirks[] = {
SFP_QUIRK_F("Turris", "RTSFP-2.5G", sfp_fixup_rollball),
SFP_QUIRK_F("Turris", "RTSFP-10", sfp_fixup_rollball),
SFP_QUIRK_F("Turris", "RTSFP-10G", sfp_fixup_rollball),
+
+ SFP_QUIRK("CISCO-PROLABS", "GLC-GE-100FX-C",
+ sfp_quirk_sgmii_100fx, sfp_fixup_sgmii_100fx),
+ SFP_QUIRK("FS", "SFP-GE-100FX",
+ sfp_quirk_sgmii_100fx, sfp_fixup_sgmii_100fx),
};
static size_t sfp_strlen(const char *str, size_t maxlen)
--
2.49.0