netdev - Re: [PATCH v2 3/3] net: sfp: add mode quirk for GPON module Ubiquiti U-Fiber Instant

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Date:   Thu, 7 Jan 2021 17:51:30 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Pali Rohár <pali@...nel.org>
Cc:     Russell King - ARM Linux admin <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Thomas Schreiber <tschreibe@...il.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Marek Behún <kabel@...nel.org>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] net: sfp: add mode quirk for GPON module Ubiquiti
 U-Fiber Instant

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@...nel.org>

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

    Andrew