[PATCH] net: phy: marvell-88q2xxx: add driver for the Marvell 88Q2220 PHY
From: Dimitri Fedrau
Date: Fri Dec 15 2023 - 16:32:04 EST
Add a driver for the Marvell 88Q2220. This driver allows to detect the
link, switch between 100BASE-T1 and 1000BASE-T1 and switch between
master and slave mode and autonegotiation.
Signed-off-by: Dimitri Fedrau <dima.fedrau@xxxxxxxxx>
---
drivers/net/phy/marvell-88q2xxx.c | 258 +++++++++++++++++++++++++++++-
include/linux/marvell_phy.h | 1 +
2 files changed, 258 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/marvell-88q2xxx.c b/drivers/net/phy/marvell-88q2xxx.c
index 1c3ff77de56b..1b79f2ea5ed7 100644
--- a/drivers/net/phy/marvell-88q2xxx.c
+++ b/drivers/net/phy/marvell-88q2xxx.c
@@ -166,7 +166,9 @@ static int mv88q2xxx_get_features(struct phy_device *phydev)
* sequence provided by Marvell. Disable it for now until a proper
* workaround is found or a new PHY revision is released.
*/
- linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->supported);
+ if (phydev->drv->phy_id == MARVELL_PHY_ID_88Q2110)
+ linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+ phydev->supported);
return 0;
}
@@ -192,6 +194,9 @@ static int mv88q2xxx_config_init(struct phy_device *phydev)
*/
phydev->pma_extable = MDIO_PMA_EXTABLE_BT1;
+ if (phydev->drv->phy_id == MARVELL_PHY_ID_88Q2220)
+ return 0;
+
/* Read the current PHY configuration */
ret = genphy_c45_read_pma(phydev);
if (ret)
@@ -235,6 +240,242 @@ static int mv88q2xxxx_get_sqi_max(struct phy_device *phydev)
return 15;
}
+static int mv88q222x_soft_reset(struct phy_device *phydev)
+{
+ int ret;
+
+ /* Enable RESET of DCL */
+ if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed == SPEED_1000) {
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x48);
+ if (ret < 0)
+ return ret;
+ }
+
+ /* Soft reset */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_PCS_1000BT1_CTRL,
+ MDIO_PCS_1000BT1_CTRL_RESET);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xffe4, 0xc);
+ if (ret < 0)
+ return ret;
+
+ /* Disable RESET of DCL */
+ if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed == SPEED_1000)
+ return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x58);
+ else
+ return ret;
+}
+
+static int mv88q222x_config_aneg_gbit(struct phy_device *phydev)
+{
+ int ret;
+
+ /* send_s detection threshold, slave and master */
+ ret = phy_write_mmd(phydev, MDIO_MMD_AN, 0x8032, 0x2020);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_AN, 0x8031, 0xa28);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_AN, 0x8031, 0xc28);
+ if (ret < 0)
+ return ret;
+
+ /* Disable DCL calibratin during tear down */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xffdb, 0xfc10);
+ if (ret < 0)
+ return ret;
+
+ /* Disable RESET of DCL*/
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x58);
+ if (ret < 0)
+ return ret;
+
+ /* Turn CM Clamp ON */
+ return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe79, 0x4);
+}
+
+static int mv88q222x_config_aneg_100m(struct phy_device *phydev)
+{
+ int ret;
+
+ /* Update Initial FFE Coefficients */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfbba, 0xcb2);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfbbb, 0xc4a);
+ if (ret < 0)
+ return ret;
+
+ /* Turn CM Clamp ON */
+ return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe79, 0x4);
+}
+
+static int mv88q222x_config_aneg_preinit(struct phy_device *phydev)
+{
+ int ret, val, i;
+
+ /* Enable txdac */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0x8033, 0x6801);
+ if (ret < 0)
+ return ret;
+
+ /* Disable ANEG */
+ ret = phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_CTRL, 0x0);
+ if (ret < 0)
+ return ret;
+
+ /* Set IEEE power down */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, 0x840);
+ if (ret < 0)
+ return ret;
+
+ /* Exit standby state(internal state) */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe1b, 0x48);
+ if (ret < 0)
+ return ret;
+
+ /* Set power management state breakpoint (internal state) */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xffe4, 0x6b6);
+ if (ret < 0)
+ return ret;
+
+ /* Exit IEEE power down */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, 0x0);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, 0x0);
+ if (ret < 0)
+ return ret;
+
+ /* Wait up to 5ms to enter to power management state, if we do not meet
+ * the target value, it is still ok to proceed
+ */
+ for (i = 0; i < 5; i++) {
+ val = phy_read_mmd(phydev, MDIO_MMD_PCS, 0xffe4);
+ if (val == 0x6ba)
+ break;
+
+ usleep_range(1000, 2000);
+ }
+
+ /* Turn CM Clamp OFF */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe79, 0x0);
+ if (ret < 0)
+ return ret;
+
+ /* mdi vcm */
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe07, 0x125a);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe09, 0x1288);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe08, 0x2588);
+ if (ret < 0)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe11, 0x1105);
+ if (ret < 0)
+ return ret;
+
+ /* aux_boost */
+ return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe72, 0x042c);
+}
+
+static int mv88q222x_config_aneg_init_b0(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = mv88q222x_config_aneg_preinit(phydev);
+ if (ret < 0)
+ return ret;
+
+ if (phydev->autoneg == AUTONEG_DISABLE) {
+ if (phydev->speed == SPEED_100)
+ return mv88q222x_config_aneg_100m(phydev);
+ else
+ return mv88q222x_config_aneg_gbit(phydev);
+ }
+
+ ret = mv88q222x_config_aneg_100m(phydev);
+ if (ret)
+ return ret;
+
+ ret = mv88q222x_config_aneg_gbit(phydev);
+ if (ret)
+ return ret;
+
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe5f, 0xe8);
+ if (ret)
+ return ret;
+
+ return phy_write_mmd(phydev, MDIO_MMD_PCS, 0xfe05, 0x755c);
+}
+
+static int mv88q222x_config_aneg(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = mv88q222x_config_aneg_init_b0(phydev);
+ if (ret < 0)
+ return ret;
+
+ ret = genphy_c45_config_aneg(phydev);
+ if (ret)
+ return ret;
+
+ return mv88q222x_soft_reset(phydev);
+}
+
+static int mv88q222x_set_loopback(struct phy_device *phydev, bool enable)
+{
+ return phy_modify_mmd(phydev,
+ MDIO_MMD_PCS,
+ MDIO_PCS_1000BT1_CTRL,
+ MDIO_PCS_CTRL1_LOOPBACK,
+ enable ? MDIO_PCS_CTRL1_LOOPBACK : 0);
+}
+
+static int mv88q222x_get_sqi(struct phy_device *phydev)
+{
+ int ret;
+
+ if (phydev->speed == SPEED_100) {
+ /* Read the SQI from the vendor specific receiver status
+ * register
+ */
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, 0x8230);
+ if (ret < 0)
+ return ret;
+
+ ret = (ret & 0xe0000) >> 13;
+ } else {
+ /* Read the SQI from the vendor specific signal quality index
+ * register
+ */
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, 0xfcd8);
+ if (ret < 0)
+ return ret;
+ }
+
+ return ret & 0x0F;
+}
+
+static int mv88q222x_get_sqi_max(struct phy_device *phydev)
+{
+ return 7;
+}
+
static struct phy_driver mv88q2xxx_driver[] = {
{
.phy_id = MARVELL_PHY_ID_88Q2110,
@@ -249,12 +490,27 @@ static struct phy_driver mv88q2xxx_driver[] = {
.get_sqi = mv88q2xxxx_get_sqi,
.get_sqi_max = mv88q2xxxx_get_sqi_max,
},
+ {
+ .phy_id = MARVELL_PHY_ID_88Q2220,
+ .phy_id_mask = MARVELL_PHY_ID_MASK,
+ .name = "mv88q2220",
+ .get_features = mv88q2xxx_get_features,
+ .config_aneg = mv88q222x_config_aneg,
+ .aneg_done = genphy_c45_aneg_done,
+ .config_init = mv88q2xxx_config_init,
+ .read_status = mv88q2xxx_read_status,
+ .soft_reset = mv88q222x_soft_reset,
+ .set_loopback = mv88q222x_set_loopback,
+ .get_sqi = mv88q222x_get_sqi,
+ .get_sqi_max = mv88q222x_get_sqi_max,
+ },
};
module_phy_driver(mv88q2xxx_driver);
static struct mdio_device_id __maybe_unused mv88q2xxx_tbl[] = {
{ MARVELL_PHY_ID_88Q2110, MARVELL_PHY_ID_MASK },
+ { MARVELL_PHY_ID_88Q2220, MARVELL_PHY_ID_MASK },
{ /*sentinel*/ }
};
MODULE_DEVICE_TABLE(mdio, mv88q2xxx_tbl);
diff --git a/include/linux/marvell_phy.h b/include/linux/marvell_phy.h
index 9b54c4f0677f..693eba9869e4 100644
--- a/include/linux/marvell_phy.h
+++ b/include/linux/marvell_phy.h
@@ -26,6 +26,7 @@
#define MARVELL_PHY_ID_88E2110 0x002b09b0
#define MARVELL_PHY_ID_88X2222 0x01410f10
#define MARVELL_PHY_ID_88Q2110 0x002b0980
+#define MARVELL_PHY_ID_88Q2220 0x002b0b20
/* Marvel 88E1111 in Finisar SFP module with modified PHY ID */
#define MARVELL_PHY_ID_88E1111_FINISAR 0x01ff0cc0
--
2.39.2