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Subject[PATCH v4 6/7] net: phy: adin1100: Add SQI support
Date
From: Alexandru Tachici <alexandru.tachici@analog.com>

Determine the SQI from MSE using a predefined table
for the 10BASE-T1L.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Alexandru Tachici <alexandru.tachici@analog.com>
---
drivers/net/phy/adin1100.c | 52 ++++++++++++++++++++++++++++++++++++++
1 file changed, 52 insertions(+)

diff --git a/drivers/net/phy/adin1100.c b/drivers/net/phy/adin1100.c
index 23d1ae61e0ef..9cbe8b92dc6f 100644
--- a/drivers/net/phy/adin1100.c
+++ b/drivers/net/phy/adin1100.c
@@ -33,6 +33,26 @@
#define ADIN_CRSM_SFT_PD_RDY BIT(1)
#define ADIN_CRSM_SYS_RDY BIT(0)

+#define ADIN_MSE_VAL 0x830B
+
+#define ADIN_SQI_MAX 7
+
+struct adin_mse_sqi_range {
+ u16 start;
+ u16 end;
+};
+
+static const struct adin_mse_sqi_range adin_mse_sqi_map[] = {
+ { 0x0A74, 0xFFFF },
+ { 0x084E, 0x0A74 },
+ { 0x0698, 0x084E },
+ { 0x053D, 0x0698 },
+ { 0x0429, 0x053D },
+ { 0x034E, 0x0429 },
+ { 0x02A0, 0x034E },
+ { 0x0000, 0x02A0 },
+};
+
/**
* struct adin_priv - ADIN PHY driver private data
* @tx_level_2v4_able: set if the PHY supports 2.4V TX levels (10BASE-T1L)
@@ -206,6 +226,36 @@ static int adin_get_features(struct phy_device *phydev)
return genphy_c45_pma_read_abilities(phydev);
}

+static int adin_get_sqi(struct phy_device *phydev)
+{
+ u16 mse_val;
+ int sqi;
+ int ret;
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT1);
+ if (ret < 0)
+ return ret;
+ else if (!(ret & MDIO_STAT1_LSTATUS))
+ return 0;
+
+ ret = phy_read_mmd(phydev, MDIO_STAT1, ADIN_MSE_VAL);
+ if (ret < 0)
+ return ret;
+
+ mse_val = 0xFFFF & ret;
+ for (sqi = 0; sqi < ARRAY_SIZE(adin_mse_sqi_map); sqi++) {
+ if (mse_val >= adin_mse_sqi_map[sqi].start && mse_val <= adin_mse_sqi_map[sqi].end)
+ return sqi;
+ }
+
+ return -EINVAL;
+}
+
+static int adin_get_sqi_max(struct phy_device *phydev)
+{
+ return ADIN_SQI_MAX;
+}
+
static int adin_probe(struct phy_device *phydev)
{
struct device *dev = &phydev->mdio.dev;
@@ -232,6 +282,8 @@ static struct phy_driver adin_driver[] = {
.set_loopback = adin_set_loopback,
.suspend = adin_suspend,
.resume = adin_resume,
+ .get_sqi = adin_get_sqi,
+ .get_sqi_max = adin_get_sqi_max,
},
};

--
2.25.1
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