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From: Michael Walle <michael@walle.cc>
To: Russell King <linux@armlinux.org.uk>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	Andrew Lunn <andrew@lunn.ch>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	"David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Michael Walle <michael@walle.cc>
Subject: [PATCH net-next] net: sfp: add 2500base-X quirk for Lantech SFP module
Date: Sat, 12 Mar 2022 21:50:14 +0100	[thread overview]
Message-ID: <20220312205014.4154907-1-michael@walle.cc> (raw)

The Lantech 8330-262D-E module is 2500base-X capable, but it reports the
nominal bitrate as 2500MBd instead of 3125MBd. Add a quirk for the
module.

The following in an EEPROM dump of such a SFP with the serial number
redacted:

00: 03 04 07 00 00 00 01 20 40 0c 05 01 19 00 00 00    ???...? @????...
10: 1e 0f 00 00 4c 61 6e 74 65 63 68 20 20 20 20 20    ??..Lantech
20: 20 20 20 20 00 00 00 00 38 33 33 30 2d 32 36 32        ....8330-262
30: 44 2d 45 20 20 20 20 20 56 31 2e 30 03 52 00 cb    D-E     V1.0?R.?
40: 00 1a 00 00 46 43 XX XX XX XX XX XX XX XX XX XX    .?..FCXXXXXXXXXX
50: 20 20 20 20 32 32 30 32 31 34 20 20 68 b0 01 98        220214  h???
60: 45 58 54 52 45 4d 45 4c 59 20 43 4f 4d 50 41 54    EXTREMELY COMPAT
70: 49 42 4c 45 20 20 20 20 20 20 20 20 20 20 20 20    IBLE

Signed-off-by: Michael Walle <michael@walle.cc>
---
 drivers/net/phy/sfp-bus.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index c1512c9925a6..15aa5ac1ff49 100644
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -74,6 +74,12 @@ static const struct sfp_quirk sfp_quirks[] = {
 		.vendor = "HUAWEI",
 		.part = "MA5671A",
 		.modes = sfp_quirk_2500basex,
+	}, {
+		// Lantech 8330-262D-E can operate at 2500base-X, but
+		// incorrectly report 2500MBd NRZ in their EEPROM
+		.vendor = "Lantech",
+		.part = "8330-262D-E",
+		.modes = sfp_quirk_2500basex,
 	}, {
 		.vendor = "UBNT",
 		.part = "UF-INSTANT",
-- 
2.30.2


             reply	other threads:[~2022-03-12 20:56 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-12 20:50 Michael Walle [this message]
2022-03-15  5:07 ` [PATCH net-next] net: sfp: add 2500base-X quirk for Lantech SFP module Jakub Kicinski
2022-03-15  8:30   ` Michael Walle
2022-03-15 11:00 ` patchwork-bot+netdevbpf

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