On Wed, Jan 06, 2021 at 04:37:49PM +0100, Pali Rohár wrote:

SFP GPON module Ubiquiti U-Fiber Instant has in its EEPROM stored nonsense
information. It claims that support all transceiver types including 10G
Ethernet which is not truth. So clear all claimed modes and set only one
mode which module supports: 1000baseX_Full.

Also this module have set SFF phys_id in its EEPROM. Kernel SFP subsustem
currently does not allow to use SFP modules detected as SFF. Therefore add
and exception for this module so it can be detected as supported.

This change finally allows to detect and use SFP GPON module Ubiquiti
U-Fiber Instant on Linux system.

EEPROM content of this SFP module is (where XX is serial number):

00: 02 04 0b ff ff ff ff ff ff ff ff 03 0c 00 14 c8    ???........??.??
10: 00 00 00 00 55 42 4e 54 20 20 20 20 20 20 20 20    ....UBNT
20: 20 20 20 20 00 18 e8 29 55 46 2d 49 4e 53 54 41        .??)UF-INSTA
30: 4e 54 20 20 20 20 20 20 34 20 20 20 05 1e 00 36    NT      4   ??.6
40: 00 06 00 00 55 42 4e 54 XX XX XX XX XX XX XX XX    .?..UBNTXXXXXXXX
50: 20 20 20 20 31 34 30 31 32 33 20 20 60 80 02 41        140123  `??A

Signed-off-by: Pali Rohár <pali@kernel.org>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew