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From 73472c830eae5fce2107f7f086f1e6827d215caf Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Tue, 13 Sep 2022 20:06:48 +0100
Subject: [PATCH 1/1] net: sfp: add support for HALNy GPON SFP
Add a quirk for the HALNy HL-GSFP module, which appears to have an
inverted RX_LOS signal, and maybe uses TX_FAULT as a serial port
transmit pin. Rather than use these hardware signals, switch to
using software polling for these status signals.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/phy/sfp-bus.c | 2 +-
drivers/net/phy/sfp.c | 21 ++++++++++++++++++---
2 files changed, 19 insertions(+), 4 deletions(-)
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -283,7 +283,7 @@ void sfp_parse_support(struct sfp_bus *b
phylink_set(modes, 2500baseX_Full);
}
- if (bus->sfp_quirk)
+ if (bus->sfp_quirk && bus->sfp_quirk->modes)
bus->sfp_quirk->modes(id, modes);
linkmode_or(support, support, modes);
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -327,6 +327,15 @@ static void sfp_fixup_ignore_tx_fault(st
sfp->tx_fault_ignore = true;
}
+static void sfp_fixup_halny_gsfp(struct sfp *sfp)
+{
+ /* Ignore the TX_FAULT and LOS signals on this module.
+ * these are possibly used for other purposes on this
+ * module, e.g. a serial port.
+ */
+ sfp->state_hw_mask &= ~(SFP_F_TX_FAULT | SFP_F_LOS);
+}
+
static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id,
unsigned long *modes)
{
@@ -359,6 +368,10 @@ static const struct sfp_quirk sfp_quirks
.modes = sfp_quirk_2500basex,
.fixup = sfp_fixup_long_startup,
}, {
+ .vendor = "HALNy",
+ .part = "HL-GSFP",
+ .fixup = sfp_fixup_halny_gsfp,
+ }, {
// Huawei MA5671A can operate at 2500base-X, but report 1.2GBd
// NRZ in their EEPROM
.vendor = "HUAWEI",
@@ -375,16 +388,18 @@ static const struct sfp_quirk sfp_quirks
.vendor = "UBNT",
.part = "UF-INSTANT",
.modes = sfp_quirk_ubnt_uf_instant,
- },
+ }
};
static size_t sfp_strlen(const char *str, size_t maxlen)
{
size_t size, i;
- /* Trailing characters should be filled with space chars */
+ /* Trailing characters should be filled with space chars, but
+ * some manufacturers can't read SFF-8472 and use NUL.
+ */
for (i = 0, size = 0; i < maxlen; i++)
- if (str[i] != ' ')
+ if (str[i] != ' ' && str[i] != '\0')
size = i + 1;
return size;
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