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From 43ac680124bc57951a6d0356b41498c2324388bf Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Fri, 26 Aug 2022 08:43:45 +0100
Subject: [PATCH 4/6] 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 possibly uses TX_FAULT as an inverted
host-link status signal. As we can't be certain about the modules
use of TX_FAULT, we ignore it.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
drivers/net/phy/sfp-bus.c | 2 +-
drivers/net/phy/sfp.c | 29 ++++++++++++++++++++++++++---
2 files changed, 27 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);
bitmap_or(support, support, modes, __ETHTOOL_LINK_MODE_MASK_NBITS);
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -320,6 +320,23 @@ static void sfp_fixup_ignore_tx_fault(st
sfp->tx_fault_ignore = true;
}
+static void sfp_fixup_inverted_los(struct sfp *sfp)
+{
+ const __be16 los_inverted = cpu_to_be16(SFP_OPTIONS_LOS_INVERTED);
+ const __be16 los_normal = cpu_to_be16(SFP_OPTIONS_LOS_NORMAL);
+
+ sfp->id.ext.options &= ~los_normal;
+ sfp->id.ext.options |= los_inverted;
+}
+
+static void sfp_fixup_halny_gsfp(struct sfp *sfp)
+{
+ /* LOS is inverted */
+ sfp_fixup_inverted_los(sfp);
+ /* TX fault might be inverted, but we don't know for certain. */
+ sfp_fixup_ignore_tx_fault(sfp);
+}
+
static void sfp_quirk_2500basex(const struct sfp_eeprom_id *id,
unsigned long *modes)
{
@@ -352,6 +369,10 @@ 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",
@@ -368,16 +389,18 @@ 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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