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118 lines
4.7 KiB
Diff
118 lines
4.7 KiB
Diff
From bc447c21304c1297f340d3daaf69915ebbc1f882 Mon Sep 17 00:00:00 2001
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From: Vladimir Oltean <vladimir.oltean@nxp.com>
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Date: Mon, 30 Sep 2019 19:20:26 +0300
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Subject: [PATCH] mii: Add helpers for parsing SGMII auto-negotiation
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Typically a MAC PCS auto-configures itself after it receives the
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negotiated link settings from the PHY, but some MAC devices are more
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special and need manual manipulation of the SGMII AN result.
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Therefore, add the bit definitions for the SGMII registers 4 and 5
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(local device ability, link partner ability), as well as a link_mode
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conversion helper that can be used to feed the AN results into
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phy_resolve_aneg_linkmode.
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Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
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---
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include/linux/mii.h | 50 ++++++++++++++++++++++++++++++++++++++++++++++++
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include/uapi/linux/mii.h | 10 ++++++++++
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2 files changed, 60 insertions(+)
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--- a/include/linux/mii.h
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+++ b/include/linux/mii.h
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@@ -373,6 +373,56 @@ static inline u32 mii_lpa_to_ethtool_lpa
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}
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/**
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+ * mii_lpa_mod_linkmode_adv_sgmii
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+ * @lp_advertising: pointer to destination link mode.
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+ * @lpa: value of the MII_LPA register
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+ *
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+ * A small helper function that translates MII_LPA bits to
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+ * linkmode advertisement settings for SGMII.
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+ * Leaves other bits unchanged.
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+ */
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+static inline void
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+mii_lpa_mod_linkmode_lpa_sgmii(unsigned long *lp_advertising, u32 lpa)
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+{
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+ u32 speed_duplex = lpa & LPA_SGMII_DPX_SPD_MASK;
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+
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+ linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, lp_advertising,
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+ speed_duplex == LPA_SGMII_1000HALF);
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+
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+ linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, lp_advertising,
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+ speed_duplex == LPA_SGMII_1000FULL);
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+
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+ linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, lp_advertising,
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+ speed_duplex == LPA_SGMII_100HALF);
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+
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+ linkmode_mod_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, lp_advertising,
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+ speed_duplex == LPA_SGMII_100FULL);
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+
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+ linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, lp_advertising,
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+ speed_duplex == LPA_SGMII_10HALF);
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+
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+ linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, lp_advertising,
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+ speed_duplex == LPA_SGMII_10FULL);
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+}
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+
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+/**
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+ * mii_lpa_to_linkmode_adv_sgmii
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+ * @advertising: pointer to destination link mode.
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+ * @lpa: value of the MII_LPA register
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+ *
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+ * A small helper function that translates MII_ADVERTISE bits
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+ * to linkmode advertisement settings when in SGMII mode.
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+ * Clears the old value of advertising.
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+ */
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+static inline void mii_lpa_to_linkmode_lpa_sgmii(unsigned long *lp_advertising,
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+ u32 lpa)
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+{
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+ linkmode_zero(lp_advertising);
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+
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+ mii_lpa_mod_linkmode_lpa_sgmii(lp_advertising, lpa);
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+}
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+
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+/**
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* mii_adv_mod_linkmode_adv_t
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* @advertising:pointer to destination link mode.
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* @adv: value of the MII_ADVERTISE register
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--- a/include/uapi/linux/mii.h
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+++ b/include/uapi/linux/mii.h
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@@ -71,6 +71,7 @@
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/* Advertisement control register. */
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#define ADVERTISE_SLCT 0x001f /* Selector bits */
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#define ADVERTISE_CSMA 0x0001 /* Only selector supported */
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+#define ADVERTISE_SGMII 0x0001 /* Can do SGMII */
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#define ADVERTISE_10HALF 0x0020 /* Try for 10mbps half-duplex */
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#define ADVERTISE_1000XFULL 0x0020 /* Try for 1000BASE-X full-duplex */
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#define ADVERTISE_10FULL 0x0040 /* Try for 10mbps full-duplex */
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@@ -94,6 +95,7 @@
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/* Link partner ability register. */
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#define LPA_SLCT 0x001f /* Same as advertise selector */
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+#define LPA_SGMII 0x0001 /* Can do SGMII */
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#define LPA_10HALF 0x0020 /* Can do 10mbps half-duplex */
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#define LPA_1000XFULL 0x0020 /* Can do 1000BASE-X full-duplex */
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#define LPA_10FULL 0x0040 /* Can do 10mbps full-duplex */
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@@ -104,11 +106,19 @@
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#define LPA_1000XPAUSE_ASYM 0x0100 /* Can do 1000BASE-X pause asym*/
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#define LPA_100BASE4 0x0200 /* Can do 100mbps 4k packets */
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#define LPA_PAUSE_CAP 0x0400 /* Can pause */
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+#define LPA_SGMII_DPX_SPD_MASK 0x1C00 /* SGMII duplex and speed bits */
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+#define LPA_SGMII_10HALF 0x0000 /* Can do SGMII 10mbps half-duplex */
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+#define LPA_SGMII_10FULL 0x1000 /* Can do SGMII 10mbps full-duplex */
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+#define LPA_SGMII_100HALF 0x0400 /* Can do SGMII 100mbps half-duplex */
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+#define LPA_SGMII_100FULL 0x1400 /* Can do SGMII 100mbps full-duplex */
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#define LPA_PAUSE_ASYM 0x0800 /* Can pause asymetrically */
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+#define LPA_SGMII_1000HALF 0x0800 /* Can do SGMII 1000mbps half-duplex */
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+#define LPA_SGMII_1000FULL 0x1800 /* Can do SGMII 1000mbps full-duplex */
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#define LPA_RESV 0x1000 /* Unused... */
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#define LPA_RFAULT 0x2000 /* Link partner faulted */
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#define LPA_LPACK 0x4000 /* Link partner acked us */
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#define LPA_NPAGE 0x8000 /* Next page bit */
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+#define LPA_SGMII_LINK 0x8000 /* Link partner has link */
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#define LPA_DUPLEX (LPA_10FULL | LPA_100FULL)
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#define LPA_100 (LPA_100FULL | LPA_100HALF | LPA_100BASE4)
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