--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2020 Sartura Ltd.
+ *
+ * Author: Robert Marko <robert.marko@sartura.hr>
+ *
+ * Qualcomm QCA8072 and QCA8075 PHY driver
+ */
+
+#include <linux/version.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/phy.h>
+#include <linux/bitfield.h>
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
+#include <linux/ethtool_netlink.h>
+#endif
+#include <linux/gpio.h>
+#include <linux/sfp.h>
+
+#include <dt-bindings/net/qcom-qca807x.h>
+
+#define PHY_ID_QCA8072 0x004dd0b2
+#define PHY_ID_QCA8075 0x004dd0b1
+#define PHY_ID_QCA807X_PSGMII 0x06820805
+
+/* Downshift */
+#define QCA807X_SMARTSPEED_EN BIT(5)
+#define QCA807X_SMARTSPEED_RETRY_LIMIT_MASK GENMASK(4, 2)
+#define QCA807X_SMARTSPEED_RETRY_LIMIT_DEFAULT 5
+#define QCA807X_SMARTSPEED_RETRY_LIMIT_MIN 2
+#define QCA807X_SMARTSPEED_RETRY_LIMIT_MAX 9
+
+/* Cable diagnostic test (CDT) */
+#define QCA807X_CDT 0x16
+#define QCA807X_CDT_ENABLE BIT(15)
+#define QCA807X_CDT_ENABLE_INTER_PAIR_SHORT BIT(13)
+#define QCA807X_CDT_STATUS BIT(11)
+#define QCA807X_CDT_MMD3_STATUS 0x8064
+#define QCA807X_CDT_MDI0_STATUS_MASK GENMASK(15, 12)
+#define QCA807X_CDT_MDI1_STATUS_MASK GENMASK(11, 8)
+#define QCA807X_CDT_MDI2_STATUS_MASK GENMASK(7, 4)
+#define QCA807X_CDT_MDI3_STATUS_MASK GENMASK(3, 0)
+#define QCA807X_CDT_RESULTS_INVALID 0x0
+#define QCA807X_CDT_RESULTS_OK 0x1
+#define QCA807X_CDT_RESULTS_OPEN 0x2
+#define QCA807X_CDT_RESULTS_SAME_SHORT 0x3
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_OK 0x4
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_OK 0x8
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_OK 0xc
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_OPEN 0x6
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_OPEN 0xa
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_OPEN 0xe
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_SHORT 0x7
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_SHORT 0xb
+#define QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_SHORT 0xf
+#define QCA807X_CDT_RESULTS_BUSY 0x9
+#define QCA807X_CDT_MMD3_MDI0_LENGTH 0x8065
+#define QCA807X_CDT_MMD3_MDI1_LENGTH 0x8066
+#define QCA807X_CDT_MMD3_MDI2_LENGTH 0x8067
+#define QCA807X_CDT_MMD3_MDI3_LENGTH 0x8068
+#define QCA807X_CDT_SAME_SHORT_LENGTH_MASK GENMASK(15, 8)
+#define QCA807X_CDT_CROSS_SHORT_LENGTH_MASK GENMASK(7, 0)
+
+#define QCA807X_CHIP_CONFIGURATION 0x1f
+#define QCA807X_BT_BX_REG_SEL BIT(15)
+#define QCA807X_CHIP_CONFIGURATION_MODE_CFG_MASK GENMASK(3, 0)
+#define QCA807X_CHIP_CONFIGURATION_MODE_QSGMII_SGMII 4
+#define QCA807X_CHIP_CONFIGURATION_MODE_PSGMII_FIBER 3
+#define QCA807X_CHIP_CONFIGURATION_MODE_PSGMII_ALL_COPPER 0
+
+#define QCA807X_MEDIA_SELECT_STATUS 0x1a
+#define QCA807X_MEDIA_DETECTED_COPPER BIT(5)
+#define QCA807X_MEDIA_DETECTED_1000_BASE_X BIT(4)
+#define QCA807X_MEDIA_DETECTED_100_BASE_FX BIT(3)
+
+#define QCA807X_MMD7_FIBER_MODE_AUTO_DETECTION 0x807e
+#define QCA807X_MMD7_FIBER_MODE_AUTO_DETECTION_EN BIT(0)
+
+#define QCA807X_MMD7_1000BASE_T_POWER_SAVE_PER_CABLE_LENGTH 0x801a
+#define QCA807X_CONTROL_DAC_MASK GENMASK(2, 0)
+
+#define QCA807X_MMD7_LED_100N_1 0x8074
+#define QCA807X_MMD7_LED_100N_2 0x8075
+#define QCA807X_MMD7_LED_1000N_1 0x8076
+#define QCA807X_MMD7_LED_1000N_2 0x8077
+#define QCA807X_LED_TXACT_BLK_EN_2 BIT(10)
+#define QCA807X_LED_RXACT_BLK_EN_2 BIT(9)
+#define QCA807X_LED_GT_ON_EN_2 BIT(6)
+#define QCA807X_LED_HT_ON_EN_2 BIT(5)
+#define QCA807X_LED_BT_ON_EN_2 BIT(4)
+#define QCA807X_GPIO_FORCE_EN BIT(15)
+#define QCA807X_GPIO_FORCE_MODE_MASK GENMASK(14, 13)
+
+#define QCA807X_INTR_ENABLE 0x12
+#define QCA807X_INTR_STATUS 0x13
+#define QCA807X_INTR_ENABLE_AUTONEG_ERR BIT(15)
+#define QCA807X_INTR_ENABLE_SPEED_CHANGED BIT(14)
+#define QCA807X_INTR_ENABLE_DUPLEX_CHANGED BIT(13)
+#define QCA807X_INTR_ENABLE_LINK_FAIL BIT(11)
+#define QCA807X_INTR_ENABLE_LINK_SUCCESS BIT(10)
+
+#define QCA807X_FUNCTION_CONTROL 0x10
+#define QCA807X_FC_MDI_CROSSOVER_MODE_MASK GENMASK(6, 5)
+#define QCA807X_FC_MDI_CROSSOVER_AUTO 3
+#define QCA807X_FC_MDI_CROSSOVER_MANUAL_MDIX 1
+#define QCA807X_FC_MDI_CROSSOVER_MANUAL_MDI 0
+
+#define QCA807X_PHY_SPECIFIC_STATUS 0x11
+#define QCA807X_SS_SPEED_AND_DUPLEX_RESOLVED BIT(11)
+#define QCA807X_SS_SPEED_MASK GENMASK(15, 14)
+#define QCA807X_SS_SPEED_1000 2
+#define QCA807X_SS_SPEED_100 1
+#define QCA807X_SS_SPEED_10 0
+#define QCA807X_SS_DUPLEX BIT(13)
+#define QCA807X_SS_MDIX BIT(6)
+
+/* PSGMII PHY specific */
+#define PSGMII_QSGMII_DRIVE_CONTROL_1 0xb
+#define PSGMII_QSGMII_TX_DRIVER_MASK GENMASK(7, 4)
+#define PSGMII_MODE_CTRL 0x6d
+#define PSGMII_MODE_CTRL_AZ_WORKAROUND_MASK GENMASK(3, 0)
+#define PSGMII_MMD3_SERDES_CONTROL 0x805a
+
+struct qca807x_gpio_priv {
+ struct phy_device *phy;
+};
+
+static int qca807x_get_downshift(struct phy_device *phydev, u8 *data)
+{
+ int val, cnt, enable;
+
+ val = phy_read(phydev, MII_NWAYTEST);
+ if (val < 0)
+ return val;
+
+ enable = FIELD_GET(QCA807X_SMARTSPEED_EN, val);
+ cnt = FIELD_GET(QCA807X_SMARTSPEED_RETRY_LIMIT_MASK, val) + 2;
+
+ *data = enable ? cnt : DOWNSHIFT_DEV_DISABLE;
+
+ return 0;
+}
+
+static int qca807x_set_downshift(struct phy_device *phydev, u8 cnt)
+{
+ int ret, val;
+
+ if (cnt > QCA807X_SMARTSPEED_RETRY_LIMIT_MAX ||
+ (cnt < QCA807X_SMARTSPEED_RETRY_LIMIT_MIN && cnt != DOWNSHIFT_DEV_DISABLE))
+ return -EINVAL;
+
+ if (!cnt) {
+ ret = phy_clear_bits(phydev, MII_NWAYTEST, QCA807X_SMARTSPEED_EN);
+ } else {
+ val = QCA807X_SMARTSPEED_EN;
+ val |= FIELD_PREP(QCA807X_SMARTSPEED_RETRY_LIMIT_MASK, cnt - 2);
+
+ phy_modify(phydev, MII_NWAYTEST,
+ QCA807X_SMARTSPEED_EN |
+ QCA807X_SMARTSPEED_RETRY_LIMIT_MASK,
+ val);
+ }
+
+ ret = genphy_soft_reset(phydev);
+
+ return ret;
+}
+
+static int qca807x_get_tunable(struct phy_device *phydev,
+ struct ethtool_tunable *tuna, void *data)
+{
+ switch (tuna->id) {
+ case ETHTOOL_PHY_DOWNSHIFT:
+ return qca807x_get_downshift(phydev, data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int qca807x_set_tunable(struct phy_device *phydev,
+ struct ethtool_tunable *tuna, const void *data)
+{
+ switch (tuna->id) {
+ case ETHTOOL_PHY_DOWNSHIFT:
+ return qca807x_set_downshift(phydev, *(const u8 *)data);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
+static bool qca807x_distance_valid(int result)
+{
+ switch (result) {
+ case QCA807X_CDT_RESULTS_OPEN:
+ case QCA807X_CDT_RESULTS_SAME_SHORT:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_OK:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_OK:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_OK:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_OPEN:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_OPEN:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_OPEN:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_SHORT:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_SHORT:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_SHORT:
+ return true;
+ }
+ return false;
+}
+
+static int qca807x_report_length(struct phy_device *phydev,
+ int pair, int result)
+{
+ int length;
+ int ret;
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, QCA807X_CDT_MMD3_MDI0_LENGTH + pair);
+ if (ret < 0)
+ return ret;
+
+ switch (result) {
+ case ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT:
+ length = (FIELD_GET(QCA807X_CDT_SAME_SHORT_LENGTH_MASK, ret) * 800) / 10;
+ break;
+ case ETHTOOL_A_CABLE_RESULT_CODE_OPEN:
+ case ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT:
+ length = (FIELD_GET(QCA807X_CDT_CROSS_SHORT_LENGTH_MASK, ret) * 800) / 10;
+ break;
+ }
+
+ ethnl_cable_test_fault_length(phydev, pair, length);
+
+ return 0;
+}
+
+static int qca807x_cable_test_report_trans(int result)
+{
+ switch (result) {
+ case QCA807X_CDT_RESULTS_OK:
+ return ETHTOOL_A_CABLE_RESULT_CODE_OK;
+ case QCA807X_CDT_RESULTS_OPEN:
+ return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
+ case QCA807X_CDT_RESULTS_SAME_SHORT:
+ return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_OK:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_OK:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_OK:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_OPEN:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_OPEN:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_OPEN:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI1_SAME_SHORT:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI2_SAME_SHORT:
+ case QCA807X_CDT_RESULTS_CROSS_SHORT_WITH_MDI3_SAME_SHORT:
+ return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
+ default:
+ return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
+ }
+}
+
+static int qca807x_cable_test_report(struct phy_device *phydev)
+{
+ int pair0, pair1, pair2, pair3;
+ int ret;
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, QCA807X_CDT_MMD3_STATUS);
+ if (ret < 0)
+ return ret;
+
+ pair0 = FIELD_GET(QCA807X_CDT_MDI0_STATUS_MASK, ret);
+ pair1 = FIELD_GET(QCA807X_CDT_MDI1_STATUS_MASK, ret);
+ pair2 = FIELD_GET(QCA807X_CDT_MDI2_STATUS_MASK, ret);
+ pair3 = FIELD_GET(QCA807X_CDT_MDI3_STATUS_MASK, ret);
+
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
+ qca807x_cable_test_report_trans(pair0));
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_B,
+ qca807x_cable_test_report_trans(pair1));
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_C,
+ qca807x_cable_test_report_trans(pair2));
+ ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_D,
+ qca807x_cable_test_report_trans(pair3));
+
+ if (qca807x_distance_valid(pair0))
+ qca807x_report_length(phydev, 0, qca807x_cable_test_report_trans(pair0));
+ if (qca807x_distance_valid(pair1))
+ qca807x_report_length(phydev, 1, qca807x_cable_test_report_trans(pair1));
+ if (qca807x_distance_valid(pair2))
+ qca807x_report_length(phydev, 2, qca807x_cable_test_report_trans(pair2));
+ if (qca807x_distance_valid(pair3))
+ qca807x_report_length(phydev, 3, qca807x_cable_test_report_trans(pair3));
+
+ return 0;
+}
+
+static int qca807x_cable_test_get_status(struct phy_device *phydev,
+ bool *finished)
+{
+ int val;
+
+ *finished = false;
+
+ val = phy_read(phydev, QCA807X_CDT);
+ if (!((val & QCA807X_CDT_ENABLE) && (val & QCA807X_CDT_STATUS))) {
+ *finished = true;
+
+ return qca807x_cable_test_report(phydev);
+ }
+
+ return 0;
+}
+
+static int qca807x_cable_test_start(struct phy_device *phydev)
+{
+ int val, ret;
+
+ val = phy_read(phydev, QCA807X_CDT);
+ /* Enable inter-pair short check as well */
+ val &= ~QCA807X_CDT_ENABLE_INTER_PAIR_SHORT;
+ val |= QCA807X_CDT_ENABLE;
+ ret = phy_write(phydev, QCA807X_CDT, val);
+
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_GPIOLIB
+static int qca807x_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,5,0)
+ return GPIO_LINE_DIRECTION_OUT;
+#else
+ return GPIOF_DIR_OUT;
+#endif
+}
+
+static int qca807x_gpio_get_reg(unsigned int offset)
+{
+ return QCA807X_MMD7_LED_100N_2 + (offset % 2) * 2;
+}
+
+static int qca807x_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct qca807x_gpio_priv *priv = gpiochip_get_data(gc);
+ int val;
+
+ val = phy_read_mmd(priv->phy, MDIO_MMD_AN, qca807x_gpio_get_reg(offset));
+
+ return FIELD_GET(QCA807X_GPIO_FORCE_MODE_MASK, val);
+}
+
+static void qca807x_gpio_set(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ struct qca807x_gpio_priv *priv = gpiochip_get_data(gc);
+ int val;
+
+ val = phy_read_mmd(priv->phy, MDIO_MMD_AN, qca807x_gpio_get_reg(offset));
+ val &= ~QCA807X_GPIO_FORCE_MODE_MASK;
+ val |= FIELD_PREP(QCA807X_GPIO_FORCE_MODE_MASK, value);
+
+ phy_write_mmd(priv->phy, MDIO_MMD_AN, qca807x_gpio_get_reg(offset), val);
+}
+
+static int qca807x_gpio_dir_out(struct gpio_chip *gc, unsigned int offset, int value)
+{
+ qca807x_gpio_set(gc, offset, value);
+
+ return 0;
+}
+
+static int qca807x_gpio(struct phy_device *phydev)
+{
+ struct device *dev = &phydev->mdio.dev;
+ struct qca807x_gpio_priv *priv;
+ struct gpio_chip *gc;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->phy = phydev;
+
+ gc = devm_kzalloc(dev, sizeof(*gc), GFP_KERNEL);
+ if (!gc)
+ return -ENOMEM;
+
+ gc->label = dev_name(dev);
+ gc->base = -1;
+ gc->ngpio = 2;
+ gc->parent = dev;
+ gc->owner = THIS_MODULE;
+ gc->can_sleep = true;
+ gc->get_direction = qca807x_gpio_get_direction;
+ gc->direction_output = qca807x_gpio_dir_out;
+ gc->get = qca807x_gpio_get;
+ gc->set = qca807x_gpio_set;
+
+ return devm_gpiochip_add_data(dev, gc, priv);
+}
+#endif
+
+static int qca807x_read_copper_status(struct phy_device *phydev, bool combo_port)
+{
+ int ss, err, page, old_link = phydev->link;
+
+ /* Only combo port has dual pages */
+ if (combo_port) {
+ /* Check whether copper page is set and set if needed */
+ page = phy_read(phydev, QCA807X_CHIP_CONFIGURATION);
+ if (!(page & QCA807X_BT_BX_REG_SEL)) {
+ page |= QCA807X_BT_BX_REG_SEL;
+ phy_write(phydev, QCA807X_CHIP_CONFIGURATION, page);
+ }
+ }
+
+ /* Update the link, but return if there was an error */
+ err = genphy_update_link(phydev);
+ if (err)
+ return err;
+
+ /* why bother the PHY if nothing can have changed */
+ if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
+ return 0;
+
+ phydev->speed = SPEED_UNKNOWN;
+ phydev->duplex = DUPLEX_UNKNOWN;
+ phydev->pause = 0;
+ phydev->asym_pause = 0;
+
+ err = genphy_read_lpa(phydev);
+ if (err < 0)
+ return err;
+
+ /* Read the QCA807x PHY-Specific Status register copper page,
+ * which indicates the speed and duplex that the PHY is actually
+ * using, irrespective of whether we are in autoneg mode or not.
+ */
+ ss = phy_read(phydev, QCA807X_PHY_SPECIFIC_STATUS);
+ if (ss < 0)
+ return ss;
+
+ if (ss & QCA807X_SS_SPEED_AND_DUPLEX_RESOLVED) {
+ int sfc;
+
+ sfc = phy_read(phydev, QCA807X_FUNCTION_CONTROL);
+ if (sfc < 0)
+ return sfc;
+
+ switch (FIELD_GET(QCA807X_SS_SPEED_MASK, ss)) {
+ case QCA807X_SS_SPEED_10:
+ phydev->speed = SPEED_10;
+ break;
+ case QCA807X_SS_SPEED_100:
+ phydev->speed = SPEED_100;
+ break;
+ case QCA807X_SS_SPEED_1000:
+ phydev->speed = SPEED_1000;
+ break;
+ }
+ if (ss & QCA807X_SS_DUPLEX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+
+ if (ss & QCA807X_SS_MDIX)
+ phydev->mdix = ETH_TP_MDI_X;
+ else
+ phydev->mdix = ETH_TP_MDI;
+
+ switch (FIELD_GET(QCA807X_FC_MDI_CROSSOVER_MODE_MASK, sfc)) {
+ case QCA807X_FC_MDI_CROSSOVER_MANUAL_MDI:
+ phydev->mdix_ctrl = ETH_TP_MDI;
+ break;
+ case QCA807X_FC_MDI_CROSSOVER_MANUAL_MDIX:
+ phydev->mdix_ctrl = ETH_TP_MDI_X;
+ break;
+ case QCA807X_FC_MDI_CROSSOVER_AUTO:
+ phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
+ break;
+ }
+ }
+
+ if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete)
+ phy_resolve_aneg_pause(phydev);
+
+ return 0;
+}
+
+static int qca807x_read_fiber_status(struct phy_device *phydev, bool combo_port)
+{
+ int ss, err, page, lpa, old_link = phydev->link;
+
+ /* Check whether fiber page is set and set if needed */
+ page = phy_read(phydev, QCA807X_CHIP_CONFIGURATION);
+ if (page & QCA807X_BT_BX_REG_SEL) {
+ page &= ~QCA807X_BT_BX_REG_SEL;
+ phy_write(phydev, QCA807X_CHIP_CONFIGURATION, page);
+ }
+
+ /* Update the link, but return if there was an error */
+ err = genphy_update_link(phydev);
+ if (err)
+ return err;
+
+ /* why bother the PHY if nothing can have changed */
+ if (phydev->autoneg == AUTONEG_ENABLE && old_link && phydev->link)
+ return 0;
+
+ phydev->speed = SPEED_UNKNOWN;
+ phydev->duplex = DUPLEX_UNKNOWN;
+ phydev->pause = 0;
+ phydev->asym_pause = 0;
+
+ if (phydev->autoneg == AUTONEG_ENABLE && phydev->autoneg_complete) {
+ lpa = phy_read(phydev, MII_LPA);
+ if (lpa < 0)
+ return lpa;
+
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
+ phydev->lp_advertising, lpa & LPA_LPACK);
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_1000baseX_Full_BIT,
+ phydev->lp_advertising, lpa & LPA_1000XFULL);
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT,
+ phydev->lp_advertising, lpa & LPA_1000XPAUSE);
+ linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+ phydev->lp_advertising,
+ lpa & LPA_1000XPAUSE_ASYM);
+
+ phy_resolve_aneg_linkmode(phydev);
+ }
+
+ /* Read the QCA807x PHY-Specific Status register fiber page,
+ * which indicates the speed and duplex that the PHY is actually
+ * using, irrespective of whether we are in autoneg mode or not.
+ */
+ ss = phy_read(phydev, QCA807X_PHY_SPECIFIC_STATUS);
+ if (ss < 0)
+ return ss;
+
+ if (ss & QCA807X_SS_SPEED_AND_DUPLEX_RESOLVED) {
+ switch (FIELD_GET(QCA807X_SS_SPEED_MASK, ss)) {
+ case QCA807X_SS_SPEED_100:
+ phydev->speed = SPEED_100;
+ break;
+ case QCA807X_SS_SPEED_1000:
+ phydev->speed = SPEED_1000;
+ break;
+ }
+
+ if (ss & QCA807X_SS_DUPLEX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+ }
+
+ return 0;
+}
+
+static int qca807x_read_status(struct phy_device *phydev)
+{
+ int val;
+
+ /* Check for Combo port */
+ if (phy_read(phydev, QCA807X_CHIP_CONFIGURATION)) {
+ /* Check for fiber mode first */
+ if (linkmode_test_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported)) {
+ /* Check for actual detected media */
+ val = phy_read(phydev, QCA807X_MEDIA_SELECT_STATUS);
+ if (val & QCA807X_MEDIA_DETECTED_COPPER) {
+ qca807x_read_copper_status(phydev, true);
+ } else if ((val & QCA807X_MEDIA_DETECTED_1000_BASE_X) ||
+ (val & QCA807X_MEDIA_DETECTED_100_BASE_FX)) {
+ qca807x_read_fiber_status(phydev, true);
+ }
+ } else {
+ qca807x_read_copper_status(phydev, true);
+ }
+ } else {
+ qca807x_read_copper_status(phydev, false);
+ }
+
+ return 0;
+}
+
+static int qca807x_config_intr(struct phy_device *phydev)
+{
+ int ret, val;
+
+ val = phy_read(phydev, QCA807X_INTR_ENABLE);
+
+ if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+ /* Check for combo port as it has fewer interrupts */
+ if (phy_read(phydev, QCA807X_CHIP_CONFIGURATION)) {
+ val |= QCA807X_INTR_ENABLE_SPEED_CHANGED;
+ val |= QCA807X_INTR_ENABLE_LINK_FAIL;
+ val |= QCA807X_INTR_ENABLE_LINK_SUCCESS;
+ } else {
+ val |= QCA807X_INTR_ENABLE_AUTONEG_ERR;
+ val |= QCA807X_INTR_ENABLE_SPEED_CHANGED;
+ val |= QCA807X_INTR_ENABLE_DUPLEX_CHANGED;
+ val |= QCA807X_INTR_ENABLE_LINK_FAIL;
+ val |= QCA807X_INTR_ENABLE_LINK_SUCCESS;
+ }
+ ret = phy_write(phydev, QCA807X_INTR_ENABLE, val);
+ } else {
+ ret = phy_write(phydev, QCA807X_INTR_ENABLE, 0);
+ }
+
+ return ret;
+}
+
+static int qca807x_ack_intr(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = phy_read(phydev, QCA807X_INTR_STATUS);
+
+ return (ret < 0) ? ret : 0;
+}
+
+static int qca807x_led_config(struct phy_device *phydev)
+{
+ struct device_node *node = phydev->mdio.dev.of_node;
+ bool led_config = false;
+ int val;
+
+ val = phy_read_mmd(phydev, MDIO_MMD_AN, QCA807X_MMD7_LED_1000N_1);
+ if (val < 0)
+ return val;
+
+ if (of_property_read_bool(node, "qcom,single-led-1000")) {
+ val |= QCA807X_LED_TXACT_BLK_EN_2;
+ val |= QCA807X_LED_RXACT_BLK_EN_2;
+ val |= QCA807X_LED_GT_ON_EN_2;
+
+ led_config = true;
+ }
+
+ if (of_property_read_bool(node, "qcom,single-led-100")) {
+ val |= QCA807X_LED_HT_ON_EN_2;
+
+ led_config = true;
+ }
+
+ if (of_property_read_bool(node, "qcom,single-led-10")) {
+ val |= QCA807X_LED_BT_ON_EN_2;
+
+ led_config = true;
+ }
+
+ if (led_config)
+ return phy_write_mmd(phydev, MDIO_MMD_AN, QCA807X_MMD7_LED_1000N_1, val);
+ else
+ return 0;
+}
+
+static const struct sfp_upstream_ops qca807x_sfp_ops = {
+ .attach = phy_sfp_attach,
+ .detach = phy_sfp_detach,
+};
+
+static int qca807x_config(struct phy_device *phydev)
+{
+ struct device_node *node = phydev->mdio.dev.of_node;
+ int control_dac, ret = 0;
+ u32 of_control_dac;
+
+ /* Check for Combo port */
+ if (phy_read(phydev, QCA807X_CHIP_CONFIGURATION)) {
+ int fiber_mode_autodect;
+ int psgmii_serdes;
+ int chip_config;
+
+ if (of_property_read_bool(node, "qcom,fiber-enable")) {
+ /* Enable fiber mode autodection (1000Base-X or 100Base-FX) */
+ fiber_mode_autodect = phy_read_mmd(phydev, MDIO_MMD_AN,
+ QCA807X_MMD7_FIBER_MODE_AUTO_DETECTION);
+ fiber_mode_autodect |= QCA807X_MMD7_FIBER_MODE_AUTO_DETECTION_EN;
+ phy_write_mmd(phydev, MDIO_MMD_AN, QCA807X_MMD7_FIBER_MODE_AUTO_DETECTION,
+ fiber_mode_autodect);
+
+ /* Enable 4 copper + combo port mode */
+ chip_config = phy_read(phydev, QCA807X_CHIP_CONFIGURATION);
+ chip_config &= ~QCA807X_CHIP_CONFIGURATION_MODE_CFG_MASK;
+ chip_config |= FIELD_PREP(QCA807X_CHIP_CONFIGURATION_MODE_CFG_MASK,
+ QCA807X_CHIP_CONFIGURATION_MODE_PSGMII_FIBER);
+ phy_write(phydev, QCA807X_CHIP_CONFIGURATION, chip_config);
+
+ linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->supported);
+ linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, phydev->advertising);
+ }
+
+ /* Prevent PSGMII going into hibernation via PSGMII self test */
+ psgmii_serdes = phy_read_mmd(phydev, MDIO_MMD_PCS, PSGMII_MMD3_SERDES_CONTROL);
+ psgmii_serdes &= ~BIT(1);
+ ret = phy_write_mmd(phydev, MDIO_MMD_PCS,
+ PSGMII_MMD3_SERDES_CONTROL,
+ psgmii_serdes);
+ }
+
+ if (!of_property_read_u32(node, "qcom,control-dac", &of_control_dac)) {
+ control_dac = phy_read_mmd(phydev, MDIO_MMD_AN,
+ QCA807X_MMD7_1000BASE_T_POWER_SAVE_PER_CABLE_LENGTH);
+ control_dac &= ~QCA807X_CONTROL_DAC_MASK;
+ control_dac |= FIELD_PREP(QCA807X_CONTROL_DAC_MASK, of_control_dac);
+ ret = phy_write_mmd(phydev, MDIO_MMD_AN,
+ QCA807X_MMD7_1000BASE_T_POWER_SAVE_PER_CABLE_LENGTH,
+ control_dac);
+ }
+
+ /* Optionally configure LED-s */
+ if (IS_ENABLED(CONFIG_GPIOLIB)) {
+ /* Check whether PHY-s pins are used as GPIO-s */
+ if (!of_property_read_bool(node, "gpio-controller"))
+ ret = qca807x_led_config(phydev);
+ } else {
+ ret = qca807x_led_config(phydev);
+ }
+
+ return ret;
+}
+
+static int qca807x_probe(struct phy_device *phydev)
+{
+ struct device_node *node = phydev->mdio.dev.of_node;
+ int ret = 0;
+
+ if (IS_ENABLED(CONFIG_GPIOLIB)) {
+ /* Do not register a GPIO controller unless flagged for it */
+ if (of_property_read_bool(node, "gpio-controller"))
+ ret = qca807x_gpio(phydev);
+ }
+
+ /* Attach SFP bus on combo port*/
+ if (of_property_read_bool(node, "qcom,fiber-enable")) {
+ if (phy_read(phydev, QCA807X_CHIP_CONFIGURATION))
+ ret = phy_sfp_probe(phydev, &qca807x_sfp_ops);
+ }
+
+ return ret;
+}
+
+static int qca807x_psgmii_config(struct phy_device *phydev)
+{
+ struct device_node *node = phydev->mdio.dev.of_node;
+ int psgmii_az, tx_amp, ret = 0;
+ u32 tx_driver_strength;
+
+ /* Workaround to enable AZ transmitting ability */
+ if (of_property_read_bool(node, "qcom,psgmii-az")) {
+ psgmii_az = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, PSGMII_MODE_CTRL);
+ psgmii_az &= ~PSGMII_MODE_CTRL_AZ_WORKAROUND_MASK;
+ psgmii_az |= FIELD_PREP(PSGMII_MODE_CTRL_AZ_WORKAROUND_MASK, 0xc);
+ ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, PSGMII_MODE_CTRL, psgmii_az);
+ psgmii_az = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, PSGMII_MODE_CTRL);
+ }
+
+ /* PSGMII/QSGMII TX amp set to DT defined value instead of default 600mV */
+ if (!of_property_read_u32(node, "qcom,tx-driver-strength", &tx_driver_strength)) {
+ tx_amp = phy_read(phydev, PSGMII_QSGMII_DRIVE_CONTROL_1);
+ tx_amp &= ~PSGMII_QSGMII_TX_DRIVER_MASK;
+ tx_amp |= FIELD_PREP(PSGMII_QSGMII_TX_DRIVER_MASK, tx_driver_strength);
+ ret = phy_write(phydev, PSGMII_QSGMII_DRIVE_CONTROL_1, tx_amp);
+ }
+
+ return ret;
+}
+
+static struct phy_driver qca807x_drivers[] = {
+ {
+ PHY_ID_MATCH_EXACT(PHY_ID_QCA8072),
+ .name = "Qualcomm QCA8072",
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
+ .flags = PHY_POLL_CABLE_TEST,
+#endif
+ /* PHY_GBIT_FEATURES */
+ .probe = qca807x_probe,
+ .config_init = qca807x_config,
+ .read_status = qca807x_read_status,
+ .config_intr = qca807x_config_intr,
+ .ack_interrupt = qca807x_ack_intr,
+ .soft_reset = genphy_soft_reset,
+ .get_tunable = qca807x_get_tunable,
+ .set_tunable = qca807x_set_tunable,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
+ .cable_test_start = qca807x_cable_test_start,
+ .cable_test_get_status = qca807x_cable_test_get_status,
+#endif
+ },
+ {
+ PHY_ID_MATCH_EXACT(PHY_ID_QCA8075),
+ .name = "Qualcomm QCA8075",
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
+ .flags = PHY_POLL_CABLE_TEST,
+#endif
+ /* PHY_GBIT_FEATURES */
+ .probe = qca807x_probe,
+ .config_init = qca807x_config,
+ .read_status = qca807x_read_status,
+ .config_intr = qca807x_config_intr,
+ .ack_interrupt = qca807x_ack_intr,
+ .soft_reset = genphy_soft_reset,
+ .get_tunable = qca807x_get_tunable,
+ .set_tunable = qca807x_set_tunable,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
+ .cable_test_start = qca807x_cable_test_start,
+ .cable_test_get_status = qca807x_cable_test_get_status,
+#endif
+ },
+ {
+ PHY_ID_MATCH_EXACT(PHY_ID_QCA807X_PSGMII),
+ .name = "Qualcomm QCA807x PSGMII",
+ .probe = qca807x_psgmii_config,
+ },
+};
+module_phy_driver(qca807x_drivers);
+
+static struct mdio_device_id __maybe_unused qca807x_tbl[] = {
+ { PHY_ID_MATCH_EXACT(PHY_ID_QCA8072) },
+ { PHY_ID_MATCH_EXACT(PHY_ID_QCA8075) },
+ { PHY_ID_MATCH_MODEL(PHY_ID_QCA807X_PSGMII) },
+ { }
+};
+
+MODULE_AUTHOR("Robert Marko");
+MODULE_DESCRIPTION("Qualcomm QCA807x PHY driver");
+MODULE_DEVICE_TABLE(mdio, qca807x_tbl);
+MODULE_LICENSE("GPL");
projects / openwrt / staging / rmilecki.git / commitdiff