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net: sfp: add quirks for OEM XGSPONST2001 and FS XGS-SFP-ONT-MACI

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Cheap XGS-PON ONT sticks identifying as vendor "OEM", PN "XGSPONST2001"
have broken TX_FAULT and LOS indicators (driven by the ONU serial
passthrough wires) and need a longer T_START_UP than the SFF-8472
default. The Fiberstore XGS-SFP-ONT-MACI MAC-mode ONT stick has the
same ONT-class TX_FAULT/LOS wiring and startup behaviour. Apply the
existing sfp_fixup_potron handler to both, which masks both signals
and bumps T_START_UP to T_START_UP_BAD_GPON.

The XGSPONST2001 returns the 12 legitimate PN characters followed by
non-printable garbage on cold power-up reads (the same module reads
back clean and space-padded after a warm reseat), which defeats
exact-length matching precisely on the boot where the quirk must
apply: the kernel honors the spurious TX_FAULT and the SFP state
machine eventually disables the module. Match its part as a prefix
using SFP_QUIRK_F_PREFIX.

The XGS-SFP-ONT-MACI PN is the product name (XGS-SFP-ONT-MAC-I)
truncated at the 16-byte field width, so the field is fully occupied
by legitimate characters and a plain exact-match SFP_QUIRK_F entry is
correct.

Signed-off-by: Martino Dell'Ambrogio <tillo@tillo.ch>
Link: https://patch.msgid.link/20260812154708.2201266-3-tillo@tillo.ch
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Martino Dell'Ambrogio 2026-08-12 17:47:08 +02:00 committed by Jakub Kicinski
parent f53167e29b
commit 03fa69146f
1 changed files with 15 additions and 0 deletions
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15
drivers/net/phy/sfp.c
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@ -557,6 +557,13 @@ static const struct sfp_quirk sfp_quirks[] = {
SFP_QUIRK("FS", "GPON-ONU-34-20BI", sfp_quirk_2500basex,
sfp_fixup_ignore_tx_fault),
// Fiberstore XGS-SFP-ONT-MACI is a MAC-mode XGS-PON ONT stick with
// ONT-class serial-passthrough TX_FAULT/LOS wiring and slow startup;
// mask both signals and extend T_START_UP via the potron fixup. The
// PN is the product name (XGS-SFP-ONT-MAC-I) truncated at the 16-byte
// field width, so the field is fully occupied and matches exactly.
SFP_QUIRK_F("FS", "XGS-SFP-ONT-MACI", sfp_fixup_potron),
SFP_QUIRK_F("HALNy", "HL-GSFP", sfp_fixup_halny_gsfp),
SFP_QUIRK_F("H-COM", "SPP425H-GAB4", sfp_fixup_potron),
@ -617,6 +624,14 @@ static const struct sfp_quirk sfp_quirks[] = {
SFP_QUIRK_S("OEM", "SFP-2.5G-LH20-A", sfp_quirk_2500basex),
SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc),
SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc),
// OEM XGSPONST2001 is an XGS-PON ONT stick with broken TX_FAULT and
// LOS indicators and slow startup, just like potron. On cold
// power-up the EEPROM vendor PN field reads back with non-printable
// garbage past the legitimate string instead of space padding, so
// match the part as a prefix.
SFP_QUIRK_F_PREFIX("OEM", "XGSPONST2001", sfp_fixup_potron),
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),