Date:   Fri,  9 Apr 2021 21:41:06 +0300
From:   "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@....nxp.com>
To:     andrew@...n.ch, hkallweit1@...il.com, linux@...linux.org.uk,
        davem@...emloft.net, kuba@...nel.org
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@....nxp.com>
Subject: [PATCH] phy: nxp-c45: add driver for tja1103

Add driver for tja1103 driver and for future NXP C45 PHYs.

Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@....nxp.com>
---
 MAINTAINERS               |   6 +
 drivers/net/phy/Kconfig   |   6 +
 drivers/net/phy/Makefile  |   1 +
 drivers/net/phy/nxp-c45.c | 622 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 635 insertions(+)
 create mode 100644 drivers/net/phy/nxp-c45.c

diff --git a/MAINTAINERS b/MAINTAINERS
index a008b70f3c16..082a5eca8913 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12518,6 +12518,12 @@ F:	drivers/nvmem/
 F:	include/linux/nvmem-consumer.h
 F:	include/linux/nvmem-provider.h
 
+NXP C45 PHY DRIVER
+M:	Radu Pirea <radu-nicolae.pirea@....nxp.com>
+L:	netdev@...r.kernel.org
+S:	Maintained
+F:	drivers/net/phy/nxp-c45.c
+
 NXP FSPI DRIVER
 M:	Ashish Kumar <ashish.kumar@....com>
 R:	Yogesh Gaur <yogeshgaur.83@...il.com>
diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 698bea312adc..fd2da80b5339 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -228,6 +228,12 @@ config NATIONAL_PHY
 	help
 	  Currently supports the DP83865 PHY.
 
+config NXP_C45_PHY
+	tristate "NXP C45 PHYs"
+	help
+	  Enable support for NXP C45 PHYs.
+	  Currently supports only the TJA1103 PHY.
+
 config NXP_TJA11XX_PHY
 	tristate "NXP TJA11xx PHYs support"
 	depends on HWMON
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index a13e402074cf..a18f095748b5 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_MICROCHIP_PHY)	+= microchip.o
 obj-$(CONFIG_MICROCHIP_T1_PHY)	+= microchip_t1.o
 obj-$(CONFIG_MICROSEMI_PHY)	+= mscc/
 obj-$(CONFIG_NATIONAL_PHY)	+= national.o
+obj-$(CONFIG_NXP_C45_PHY)	+= nxp-c45.o
 obj-$(CONFIG_NXP_TJA11XX_PHY)	+= nxp-tja11xx.o
 obj-$(CONFIG_QSEMI_PHY)		+= qsemi.o
 obj-$(CONFIG_REALTEK_PHY)	+= realtek.o
diff --git a/drivers/net/phy/nxp-c45.c b/drivers/net/phy/nxp-c45.c
new file mode 100644
index 000000000000..2961799f7d05
--- /dev/null
+++ b/drivers/net/phy/nxp-c45.c
@@ -0,0 +1,622 @@
+// SPDX-License-Identifier: GPL-2.0
+/* NXP C45 PHY driver
+ * Copyright (C) 2021 NXP
+ * Copyright (C) 2021 Radu Pirea <radu-nicolae.pirea@....nxp.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/ethtool.h>
+#include <linux/ethtool_netlink.h>
+#include <linux/kernel.h>
+#include <linux/mii.h>
+#include <linux/module.h>
+#include <linux/phy.h>
+#include <linux/processor.h>
+#include <linux/property.h>
+
+#define PHY_ID_BASE_T1			0x001BB010
+
+#define B100T1_PMAPMD_CTL		0x0834
+#define B100T1_PMAPMD_CONFIG_EN		BIT(15)
+#define B100T1_PMAPMD_MASTER		BIT(14)
+#define MASTER_MODE			(B100T1_PMAPMD_CONFIG_EN | B100T1_PMAPMD_MASTER)
+#define SLAVE_MODE			(B100T1_PMAPMD_CONFIG_EN)
+
+#define DEVICE_CONTROL			0x0040
+#define DEVICE_CONTROL_RESET		BIT(15)
+#define DEVICE_CONTROL_CONFIG_GLOBAL_EN	BIT(14)
+#define DEVICE_CONTROL_CONFIG_ALL_EN	BIT(13)
+#define RESET_POLL_NS			(250 * NSEC_PER_MSEC)
+
+#define PHY_CONTROL			0x8100
+#define PHY_CONFIG_EN			BIT(14)
+#define PHY_START_OP			BIT(0)
+
+#define PHY_CONFIG			0x8108
+#define PHY_CONFIG_AUTO			BIT(0)
+
+#define SIGNAL_QUALITY			0x8320
+#define SQI_VALID			BIT(14)
+#define SQI_MASK			GENMASK(2, 0)
+#define MAX_SQI				SQI_MASK
+
+#define CABLE_TEST			0x8330
+#define CABLE_TEST_ENABLE		BIT(15)
+#define CABLE_TEST_START		BIT(14)
+#define CABLE_TEST_VALID		BIT(13)
+#define CABLE_TEST_OK			0x00
+#define CABLE_TEST_SHORTED		0x01
+#define CABLE_TEST_OPEN			0x02
+#define CABLE_TEST_UNKNOWN		0x07
+
+#define PORT_CONTROL			0x8040
+#define PORT_CONTROL_EN			BIT(14)
+
+#define PORT_INFRA_CONTROL		0xAC00
+#define PORT_INFRA_CONTROL_EN		BIT(14)
+
+#define VND1_RXID			0xAFCC
+#define VND1_TXID			0xAFCD
+#define ID_ENABLE			BIT(15)
+
+#define ABILITIES			0xAFC4
+#define RGMII_ID_ABILITY		BIT(15)
+#define RGMII_ABILITY			BIT(14)
+#define RMII_ABILITY			BIT(10)
+#define REVMII_ABILITY			BIT(9)
+#define MII_ABILITY			BIT(8)
+#define SGMII_ABILITY			BIT(0)
+
+#define MII_BASIC_CONFIG		0xAFC6
+#define MII_BASIC_CONFIG_REV		BIT(8)
+#define MII_BASIC_CONFIG_SGMII		0x9
+#define MII_BASIC_CONFIG_RGMII		0x7
+#define MII_BASIC_CONFIG_RMII		0x5
+#define MII_BASIC_CONFIG_MII		0x4
+
+#define SYMBOL_ERROR_COUNTER		0x8350
+#define LINK_DROP_COUNTER		0x8352
+#define LINK_LOSSES_AND_FAILURES	0x8353
+#define R_GOOD_FRAME_CNT		0xA950
+#define R_BAD_FRAME_CNT			0xA952
+#define R_RXER_FRAME_CNT		0xA954
+#define RX_PREAMBLE_COUNT		0xAFCE
+#define TX_PREAMBLE_COUNT		0xAFCF
+#define RX_IPG_LENGTH			0xAFD0
+#define TX_IPG_LENGTH			0xAFD1
+#define COUNTERS_EN			BIT(15)
+
+#define CLK_25MHZ_PS_PERIOD		40000UL
+#define PS_PER_DEGREE			(CLK_25MHZ_PS_PERIOD / 360)
+#define MIN_ID_PS			8222U
+#define MAX_ID_PS			11300U
+
+struct nxp_c45_phy {
+	u32 tx_delay;
+	u32 rx_delay;
+};
+
+struct nxp_c45_phy_stats {
+	const char	*name;
+	u8		mmd;
+	u16		reg;
+	u8		off;
+	u16		mask;
+};
+
+static const struct nxp_c45_phy_stats nxp_c45_hw_stats[] = {
+	{ "phy_symbol_error_cnt", MDIO_MMD_VEND1, SYMBOL_ERROR_COUNTER, 0, GENMASK(15, 0) },
+	{ "phy_link_status_drop_cnt", MDIO_MMD_VEND1, LINK_DROP_COUNTER, 8, GENMASK(13, 8) },
+	{ "phy_link_availability_drop_cnt", MDIO_MMD_VEND1, LINK_DROP_COUNTER, 0, GENMASK(5, 0) },
+	{ "phy_link_loss_cnt", MDIO_MMD_VEND1, LINK_LOSSES_AND_FAILURES, 10, GENMASK(15, 10) },
+	{ "phy_link_failure_cnt", MDIO_MMD_VEND1, LINK_LOSSES_AND_FAILURES, 0, GENMASK(9, 0) },
+	{ "r_good_frame_cnt", MDIO_MMD_VEND1, R_GOOD_FRAME_CNT, 0, GENMASK(15, 0) },
+	{ "r_bad_frame_cnt", MDIO_MMD_VEND1, R_BAD_FRAME_CNT, 0, GENMASK(15, 0) },
+	{ "r_rxer_frame_cnt", MDIO_MMD_VEND1, R_RXER_FRAME_CNT, 0, GENMASK(15, 0) },
+	{ "rx_preamble_count", MDIO_MMD_VEND1, RX_PREAMBLE_COUNT, 0, GENMASK(5, 0) },
+	{ "tx_preamble_count", MDIO_MMD_VEND1, TX_PREAMBLE_COUNT, 0, GENMASK(5, 0) },
+	{ "rx_ipg_length", MDIO_MMD_VEND1, RX_IPG_LENGTH, 0, GENMASK(8, 0) },
+	{ "tx_ipg_length", MDIO_MMD_VEND1, TX_IPG_LENGTH, 0, GENMASK(8, 0) },
+};
+
+static int nxp_c45_get_sset_count(struct phy_device *phydev)
+{
+	return ARRAY_SIZE(nxp_c45_hw_stats);
+}
+
+static void nxp_c45_get_strings(struct phy_device *phydev, u8 *data)
+{
+	size_t i;
+
+	for (i = 0; i < ARRAY_SIZE(nxp_c45_hw_stats); i++) {
+		strncpy(data + i * ETH_GSTRING_LEN,
+			nxp_c45_hw_stats[i].name, ETH_GSTRING_LEN);
+	}
+}
+
+static void nxp_c45_get_stats(struct phy_device *phydev,
+			      struct ethtool_stats *stats, u64 *data)
+{
+	size_t i;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(nxp_c45_hw_stats); i++) {
+		ret = phy_read_mmd(phydev, nxp_c45_hw_stats[i].mmd, nxp_c45_hw_stats[i].reg);
+		if (ret < 0) {
+			data[i] = U64_MAX;
+		} else {
+			data[i] = ret & nxp_c45_hw_stats[i].mask;
+			data[i] >>= nxp_c45_hw_stats[i].off;
+		}
+	}
+}
+
+static int nxp_c45_config_enable(struct phy_device *phydev)
+{
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, DEVICE_CONTROL, DEVICE_CONTROL_CONFIG_GLOBAL_EN |
+		      DEVICE_CONTROL_CONFIG_ALL_EN);
+	usleep_range(400, 450);
+
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, PORT_CONTROL, PORT_CONTROL_EN);
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, PHY_CONTROL, PHY_CONFIG_EN);
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, PORT_INFRA_CONTROL, PORT_INFRA_CONTROL_EN);
+
+	return 0;
+}
+
+static int nxp_c45_start_op(struct phy_device *phydev)
+{
+	int reg;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, PHY_CONTROL);
+	reg |= PHY_START_OP;
+
+	return phy_write_mmd(phydev, MDIO_MMD_VEND1, PHY_CONTROL, reg);
+}
+
+static bool nxp_c45_can_sleep(struct phy_device *phydev)
+{
+	int reg;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT1);
+	if (reg < 0)
+		return false;
+
+	return !!(reg & MDIO_STAT1_LPOWERABLE);
+}
+
+static int nxp_c45_resume(struct phy_device *phydev)
+{
+	int reg;
+
+	if (!nxp_c45_can_sleep(phydev))
+		return -EOPNOTSUPP;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
+	reg &= ~MDIO_CTRL1_LPOWER;
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, reg);
+
+	return 0;
+}
+
+static int nxp_c45_suspend(struct phy_device *phydev)
+{
+	int reg;
+
+	if (!nxp_c45_can_sleep(phydev))
+		return -EOPNOTSUPP;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
+	reg |= MDIO_CTRL1_LPOWER;
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, reg);
+
+	return 0;
+}
+
+static int nxp_c45_reset_done(struct phy_device *phydev)
+{
+	return !(phy_read_mmd(phydev, MDIO_MMD_VEND1, DEVICE_CONTROL) & DEVICE_CONTROL_RESET);
+}
+
+static int nxp_c45_reset_done_or_timeout(struct phy_device *phydev,
+					 ktime_t timeout)
+{
+	ktime_t cur = ktime_get();
+
+	return nxp_c45_reset_done(phydev) || ktime_after(cur, timeout);
+}
+
+static int nxp_c45_soft_reset(struct phy_device *phydev)
+{
+	ktime_t timeout;
+	int ret;
+
+	ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, DEVICE_CONTROL, DEVICE_CONTROL_RESET);
+	if (ret)
+		return ret;
+
+	timeout = ktime_add_ns(ktime_get(), RESET_POLL_NS);
+	spin_until_cond(nxp_c45_reset_done_or_timeout(phydev, timeout));
+	if (!nxp_c45_reset_done(phydev)) {
+		phydev_err(phydev, "reset fail\n");
+		return -EIO;
+	}
+	return 0;
+}
+
+static int nxp_c45_cable_test_start(struct phy_device *phydev)
+{
+	return phy_write_mmd(phydev, MDIO_MMD_VEND1, CABLE_TEST,
+			     CABLE_TEST_ENABLE | CABLE_TEST_START);
+}
+
+static int nxp_c45_cable_test_get_status(struct phy_device *phydev,
+					 bool *finished)
+{
+	int ret;
+	u8 cable_test_result;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, CABLE_TEST);
+	if (!(ret & CABLE_TEST_VALID)) {
+		*finished = false;
+		return 0;
+	}
+
+	*finished = true;
+	cable_test_result = ret & GENMASK(2, 0);
+
+	switch (cable_test_result) {
+	case CABLE_TEST_OK:
+		ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
+					ETHTOOL_A_CABLE_RESULT_CODE_OK);
+		break;
+	case CABLE_TEST_SHORTED:
+		ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
+					ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT);
+		break;
+	case CABLE_TEST_OPEN:
+		ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
+					ETHTOOL_A_CABLE_RESULT_CODE_OPEN);
+		break;
+	default:
+		ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
+					ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC);
+	}
+
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, CABLE_TEST, 0);
+
+	return nxp_c45_start_op(phydev);
+}
+
+static int nxp_c45_setup_master_slave(struct phy_device *phydev)
+{
+	switch (phydev->master_slave_set) {
+	case MASTER_SLAVE_CFG_MASTER_FORCE:
+	case MASTER_SLAVE_CFG_MASTER_PREFERRED:
+		phy_write_mmd(phydev, MDIO_MMD_PMAPMD, B100T1_PMAPMD_CTL, MASTER_MODE);
+		break;
+	case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
+	case MASTER_SLAVE_CFG_SLAVE_FORCE:
+		phy_write_mmd(phydev, MDIO_MMD_PMAPMD, B100T1_PMAPMD_CTL, SLAVE_MODE);
+		break;
+	case MASTER_SLAVE_CFG_UNKNOWN:
+	case MASTER_SLAVE_CFG_UNSUPPORTED:
+		return 0;
+	default:
+		phydev_warn(phydev, "Unsupported Master/Slave mode\n");
+		return -EOPNOTSUPP;
+	}
+
+	return 0;
+}
+
+static int nxp_c45_read_master_slave(struct phy_device *phydev)
+{
+	int reg;
+
+	phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
+	phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, B100T1_PMAPMD_CTL);
+	if (reg < 0)
+		return reg;
+
+	if (reg & B100T1_PMAPMD_MASTER) {
+		phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE;
+		phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER;
+	} else {
+		phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE;
+		phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE;
+	}
+
+	return 0;
+}
+
+static int nxp_c45_config_aneg(struct phy_device *phydev)
+{
+	return nxp_c45_setup_master_slave(phydev);
+}
+
+static int nxp_c45_read_status(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = genphy_c45_read_status(phydev);
+	if (ret)
+		return ret;
+
+	ret = nxp_c45_read_master_slave(phydev);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int nxp_c45_set_loopback(struct phy_device *phydev, bool enable)
+{
+	int reg;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1);
+	if (reg < 0)
+		return reg;
+
+	if (enable)
+		reg |= MDIO_PCS_CTRL1_LOOPBACK;
+	else
+		reg &= ~MDIO_PCS_CTRL1_LOOPBACK;
+
+	phy_write_mmd(phydev, MDIO_MMD_PCS, MDIO_CTRL1, reg);
+
+	phydev->loopback_enabled = enable;
+
+	phydev_dbg(phydev, "Loopback %s\n", enable ? "enabled" : "disabled");
+
+	return 0;
+}
+
+static int nxp_c45_get_sqi(struct phy_device *phydev)
+{
+	int reg;
+
+	reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, SIGNAL_QUALITY);
+	if (!(reg & SQI_VALID))
+		return -EINVAL;
+
+	reg &= SQI_MASK;
+
+	return reg;
+}
+
+static int nxp_c45_get_sqi_max(struct phy_device *phydev)
+{
+	return MAX_SQI;
+}
+
+static int nxp_c45_check_delay(struct phy_device *phydev, u32 delay)
+{
+	if (delay < MIN_ID_PS) {
+		phydev_err(phydev, "delay value smaller than %u\n", MIN_ID_PS);
+		return -EINVAL;
+	}
+
+	if (delay > MAX_ID_PS) {
+		phydev_err(phydev, "delay value higher than %u\n", MAX_ID_PS);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static u64 nxp_c45_get_phase_shift(u64 phase_offset_raw)
+{
+	/* The delay in degree phase is 73.8 + phase_offset_raw * 0.9.
+	 * To avoid floating point operations we'll multiply by 10
+	 * and get 1 decimal point precision.
+	 */
+	phase_offset_raw *= 10;
+	return (phase_offset_raw - 738) / 9;
+}
+
+static void nxp_c45_set_delays(struct phy_device *phydev)
+{
+	struct nxp_c45_phy *priv = phydev->priv;
+	u64 tx_delay = priv->tx_delay;
+	u64 rx_delay = priv->rx_delay;
+	u64 degree;
+
+	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
+		degree = tx_delay / PS_PER_DEGREE;
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, VND1_TXID,
+			      ID_ENABLE | nxp_c45_get_phase_shift(degree));
+	}
+
+	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
+		degree = rx_delay / PS_PER_DEGREE;
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, VND1_RXID,
+			      ID_ENABLE | nxp_c45_get_phase_shift(degree));
+	}
+}
+
+static int nxp_c45_get_delays(struct phy_device *phydev)
+{
+	struct nxp_c45_phy *priv = phydev->priv;
+	int ret;
+
+	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
+		ret = device_property_read_u32(&phydev->mdio.dev, "tx-internal-delay-ps",
+					       &priv->tx_delay);
+		if (ret) {
+			phydev_err(phydev, "tx-internal-delay-ps property missing\n");
+			return ret;
+		}
+		ret = nxp_c45_check_delay(phydev, priv->tx_delay);
+		if (ret) {
+			phydev_err(phydev, "tx-internal-delay-ps invalid value\n");
+			return ret;
+		}
+	}
+
+	if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
+	    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
+		ret = device_property_read_u32(&phydev->mdio.dev, "rx-internal-delay-ps",
+					       &priv->rx_delay);
+		if (ret) {
+			phydev_err(phydev, "rx-internal-delay-ps property missing\n");
+			return ret;
+		}
+		ret = nxp_c45_check_delay(phydev, priv->rx_delay);
+		if (ret) {
+			phydev_err(phydev, "rx-internal-delay-ps invalid value\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int nxp_c45_set_phy_mode(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, ABILITIES);
+	phydev_dbg(phydev, "Clause 45 managed PHY abilities 0x%x\n", ret);
+
+	switch (phydev->interface) {
+	case PHY_INTERFACE_MODE_RGMII:
+		if (!(ret & RGMII_ABILITY)) {
+			phydev_err(phydev, "rgmii mode not supported\n");
+			return -EINVAL;
+		}
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, MII_BASIC_CONFIG, MII_BASIC_CONFIG_RGMII);
+		break;
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+		if (!(ret & RGMII_ID_ABILITY)) {
+			phydev_err(phydev, "rgmii-id, rgmii-txid, rgmii-rxid modes are not supported\n");
+			return -EINVAL;
+		}
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, MII_BASIC_CONFIG, MII_BASIC_CONFIG_RGMII);
+		ret = nxp_c45_get_delays(phydev);
+		if (ret)
+			return ret;
+
+		nxp_c45_set_delays(phydev);
+		break;
+	case PHY_INTERFACE_MODE_MII:
+		if (!(ret & MII_ABILITY)) {
+			phydev_err(phydev, "mii mode not supported\n");
+			return -EINVAL;
+		}
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, MII_BASIC_CONFIG, MII_BASIC_CONFIG_MII);
+		break;
+	case PHY_INTERFACE_MODE_REVMII:
+		if (!(ret & REVMII_ABILITY)) {
+			phydev_err(phydev, "rev-mii mode not supported\n");
+			return -EINVAL;
+		}
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, MII_BASIC_CONFIG, MII_BASIC_CONFIG_MII |
+			      MII_BASIC_CONFIG_REV);
+		break;
+	case PHY_INTERFACE_MODE_RMII:
+		if (!(ret & RMII_ABILITY)) {
+			phydev_err(phydev, "rmii mode not supported\n");
+			return -EINVAL;
+		}
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, MII_BASIC_CONFIG, MII_BASIC_CONFIG_RMII);
+		break;
+	case PHY_INTERFACE_MODE_SGMII:
+		if (!(ret & SGMII_ABILITY)) {
+			phydev_err(phydev, "sgmii mode not supported\n");
+			return -EINVAL;
+		}
+		phy_write_mmd(phydev, MDIO_MMD_VEND1, MII_BASIC_CONFIG, MII_BASIC_CONFIG_SGMII);
+		break;
+	case PHY_INTERFACE_MODE_INTERNAL:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int nxp_c45_config_init(struct phy_device *phydev)
+{
+	int ret;
+
+	ret = nxp_c45_config_enable(phydev);
+	if (ret) {
+		phydev_err(phydev, "Failed to enable config\n");
+		return ret;
+	}
+
+	ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, PHY_CONFIG);
+	ret &= ~PHY_CONFIG_AUTO;
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, PHY_CONFIG, ret);
+
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, LINK_DROP_COUNTER, COUNTERS_EN);
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, RX_PREAMBLE_COUNT, COUNTERS_EN);
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, TX_PREAMBLE_COUNT, COUNTERS_EN);
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, RX_IPG_LENGTH, COUNTERS_EN);
+	phy_write_mmd(phydev, MDIO_MMD_VEND1, TX_IPG_LENGTH, COUNTERS_EN);
+
+	ret = nxp_c45_set_phy_mode(phydev);
+	if (ret)
+		return ret;
+
+	phydev->autoneg = AUTONEG_DISABLE;
+
+	return nxp_c45_start_op(phydev);
+}
+
+static int nxp_c45_probe(struct phy_device *phydev)
+{
+	struct nxp_c45_phy *priv;
+
+	priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	phydev->priv = priv;
+
+	return 0;
+}
+
+static struct phy_driver nxp_c45_driver[] = {
+	{
+		PHY_ID_MATCH_MODEL(PHY_ID_BASE_T1),
+		.name			= "NXP C45 BASE-T1",
+		.features		= PHY_BASIC_T1_FEATURES,
+		.probe			= nxp_c45_probe,
+		.soft_reset		= nxp_c45_soft_reset,
+		.config_aneg		= nxp_c45_config_aneg,
+		.config_init		= nxp_c45_config_init,
+		.read_status		= nxp_c45_read_status,
+		.suspend		= nxp_c45_suspend,
+		.resume			= nxp_c45_resume,
+		.get_sset_count		= nxp_c45_get_sset_count,
+		.get_strings		= nxp_c45_get_strings,
+		.get_stats		= nxp_c45_get_stats,
+		.cable_test_start	= nxp_c45_cable_test_start,
+		.cable_test_get_status	= nxp_c45_cable_test_get_status,
+		.set_loopback		= nxp_c45_set_loopback,
+		.get_sqi		= nxp_c45_get_sqi,
+		.get_sqi_max		= nxp_c45_get_sqi_max,
+	},
+};
+
+module_phy_driver(nxp_c45_driver);
+
+static struct mdio_device_id __maybe_unused nxp_c45_tbl[] = {
+	{ PHY_ID_MATCH_MODEL(PHY_ID_BASE_T1) }
+};
+
+MODULE_DEVICE_TABLE(mdio, nxp_c45_tbl);
+
+MODULE_AUTHOR("Radu Pirea <radu-nicolae.pirea@....nxp.com>");
+MODULE_DESCRIPTION("NXP C45 PHY driver");
+MODULE_LICENSE("GPL v2");
-- 
2.31.1

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