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59 lines
1.9 KiB
Diff
59 lines
1.9 KiB
Diff
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From 3d8592a23dd67fb78ad85ddf711a059d3880fcb4 Mon Sep 17 00:00:00 2001
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From: Russell King <rmk+kernel@armlinux.org.uk>
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Date: Fri, 8 Nov 2019 17:19:16 +0000
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Subject: [PATCH 654/660] net: phylink: make Broadcom BCM84881 based SFPs work
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The Broadcom BCM84881 does not appear to send the SGMII control word
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when operating in SGMII mode, which causes network adapters to fail
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to link with the PHY, or decide to operate at fixed 1G speed, even if
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the PHY negotiated 100M.
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Work around this by detecting the Broadcom BCM84881 and switch to phy
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mode rather than inband mode.
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Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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---
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drivers/net/phy/phylink.c | 17 ++++++++++++++++-
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1 file changed, 16 insertions(+), 1 deletion(-)
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--- a/drivers/net/phy/phylink.c
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+++ b/drivers/net/phy/phylink.c
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@@ -1787,12 +1787,22 @@ static void phylink_sfp_link_up(void *up
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phylink_run_resolve(pl);
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}
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+/* The Broadcom BCM84881 in the Methode DM7052 is unable to provide a SGMII
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+ * or 802.3z control word, so inband will not work.
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+ */
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+static bool phylink_phy_no_inband(struct phy_device *phy)
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+{
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+ return phy->is_c45 &&
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+ (phy->c45_ids.device_ids[1] & 0xfffffff0) == 0xae025150;
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+}
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+
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static int phylink_sfp_connect_phy(void *upstream, struct phy_device *phy)
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{
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struct phylink *pl = upstream;
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__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
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__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
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phy_interface_t interface;
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+ u8 mode;
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int ret;
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/*
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@@ -1807,8 +1817,13 @@ static int phylink_sfp_connect_phy(void
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ethtool_convert_legacy_u32_to_link_mode(supported, phy->supported);
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ethtool_convert_legacy_u32_to_link_mode(advertising, phy->advertising);
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+ if (phylink_phy_no_inband(phy))
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+ mode = MLO_AN_PHY;
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+ else
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+ mode = MLO_AN_INBAND;
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+
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/* Do the initial configuration */
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- ret = phylink_sfp_config(pl, ML_AN_INBAND, supported, advertising);
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+ ret = phylink_sfp_config(pl, mode, supported, advertising);
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if (ret < 0)
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return ret;
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