Linux 6.14-rc3

[linux.git] / drivers / net / phy / micrel.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * drivers/net/phy/micrel.c
 *
 * Driver for Micrel PHYs
 *
 * Author: David J. Choi
 *
 * Copyright (c) 2010-2013 Micrel, Inc.
 * Copyright (c) 2014 Johan Hovold <[email protected]>
 *
 * Support : Micrel Phys:
 *              Giga phys: ksz9021, ksz9031, ksz9131, lan8841, lan8814
 *              100/10 Phys : ksz8001, ksz8721, ksz8737, ksz8041
 *                         ksz8021, ksz8031, ksz8051,
 *                         ksz8081, ksz8091,
 *                         ksz8061,
 *              Switch : ksz8873, ksz886x
 *                       ksz9477, lan8804
 */

#include <linux/bitfield.h>
#include <linux/ethtool_netlink.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/phy.h>
#include <linux/micrel_phy.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/ptp_clock_kernel.h>
#include <linux/ptp_clock.h>
#include <linux/ptp_classify.h>
#include <linux/net_tstamp.h>
#include <linux/gpio/consumer.h>

/* Operation Mode Strap Override */
#define MII_KSZPHY_OMSO                         0x16
#define KSZPHY_OMSO_FACTORY_TEST                BIT(15)
#define KSZPHY_OMSO_B_CAST_OFF                  BIT(9)
#define KSZPHY_OMSO_NAND_TREE_ON                BIT(5)
#define KSZPHY_OMSO_RMII_OVERRIDE               BIT(1)
#define KSZPHY_OMSO_MII_OVERRIDE                BIT(0)

/* general Interrupt control/status reg in vendor specific block. */
#define MII_KSZPHY_INTCS                        0x1B
#define KSZPHY_INTCS_JABBER                     BIT(15)
#define KSZPHY_INTCS_RECEIVE_ERR                BIT(14)
#define KSZPHY_INTCS_PAGE_RECEIVE               BIT(13)
#define KSZPHY_INTCS_PARELLEL                   BIT(12)
#define KSZPHY_INTCS_LINK_PARTNER_ACK           BIT(11)
#define KSZPHY_INTCS_LINK_DOWN                  BIT(10)
#define KSZPHY_INTCS_REMOTE_FAULT               BIT(9)
#define KSZPHY_INTCS_LINK_UP                    BIT(8)
#define KSZPHY_INTCS_ALL                        (KSZPHY_INTCS_LINK_UP |\
                                                KSZPHY_INTCS_LINK_DOWN)
#define KSZPHY_INTCS_LINK_DOWN_STATUS           BIT(2)
#define KSZPHY_INTCS_LINK_UP_STATUS             BIT(0)
#define KSZPHY_INTCS_STATUS                     (KSZPHY_INTCS_LINK_DOWN_STATUS |\
                                                 KSZPHY_INTCS_LINK_UP_STATUS)

/* LinkMD Control/Status */
#define KSZ8081_LMD                             0x1d
#define KSZ8081_LMD_ENABLE_TEST                 BIT(15)
#define KSZ8081_LMD_STAT_NORMAL                 0
#define KSZ8081_LMD_STAT_OPEN                   1
#define KSZ8081_LMD_STAT_SHORT                  2
#define KSZ8081_LMD_STAT_FAIL                   3
#define KSZ8081_LMD_STAT_MASK                   GENMASK(14, 13)
/* Short cable (<10 meter) has been detected by LinkMD */
#define KSZ8081_LMD_SHORT_INDICATOR             BIT(12)
#define KSZ8081_LMD_DELTA_TIME_MASK             GENMASK(8, 0)

#define KSZ9x31_LMD                             0x12
#define KSZ9x31_LMD_VCT_EN                      BIT(15)
#define KSZ9x31_LMD_VCT_DIS_TX                  BIT(14)
#define KSZ9x31_LMD_VCT_PAIR(n)                 (((n) & 0x3) << 12)
#define KSZ9x31_LMD_VCT_SEL_RESULT              0
#define KSZ9x31_LMD_VCT_SEL_THRES_HI            BIT(10)
#define KSZ9x31_LMD_VCT_SEL_THRES_LO            BIT(11)
#define KSZ9x31_LMD_VCT_SEL_MASK                GENMASK(11, 10)
#define KSZ9x31_LMD_VCT_ST_NORMAL               0
#define KSZ9x31_LMD_VCT_ST_OPEN                 1
#define KSZ9x31_LMD_VCT_ST_SHORT                2
#define KSZ9x31_LMD_VCT_ST_FAIL                 3
#define KSZ9x31_LMD_VCT_ST_MASK                 GENMASK(9, 8)
#define KSZ9x31_LMD_VCT_DATA_REFLECTED_INVALID  BIT(7)
#define KSZ9x31_LMD_VCT_DATA_SIG_WAIT_TOO_LONG  BIT(6)
#define KSZ9x31_LMD_VCT_DATA_MASK100            BIT(5)
#define KSZ9x31_LMD_VCT_DATA_NLP_FLP            BIT(4)
#define KSZ9x31_LMD_VCT_DATA_LO_PULSE_MASK      GENMASK(3, 2)
#define KSZ9x31_LMD_VCT_DATA_HI_PULSE_MASK      GENMASK(1, 0)
#define KSZ9x31_LMD_VCT_DATA_MASK               GENMASK(7, 0)

#define KSZPHY_WIRE_PAIR_MASK                   0x3

#define LAN8814_CABLE_DIAG                      0x12
#define LAN8814_CABLE_DIAG_STAT_MASK            GENMASK(9, 8)
#define LAN8814_CABLE_DIAG_VCT_DATA_MASK        GENMASK(7, 0)
#define LAN8814_PAIR_BIT_SHIFT                  12

#define LAN8814_WIRE_PAIR_MASK                  0xF

/* Lan8814 general Interrupt control/status reg in GPHY specific block. */
#define LAN8814_INTC                            0x18
#define LAN8814_INTS                            0x1B

#define LAN8814_INT_LINK_DOWN                   BIT(2)
#define LAN8814_INT_LINK_UP                     BIT(0)
#define LAN8814_INT_LINK                        (LAN8814_INT_LINK_UP |\
                                                 LAN8814_INT_LINK_DOWN)

#define LAN8814_INTR_CTRL_REG                   0x34
#define LAN8814_INTR_CTRL_REG_POLARITY          BIT(1)
#define LAN8814_INTR_CTRL_REG_INTR_ENABLE       BIT(0)

#define LAN8814_EEE_STATE                       0x38
#define LAN8814_EEE_STATE_MASK2P5P              BIT(10)

#define LAN8814_PD_CONTROLS                     0x9d
#define LAN8814_PD_CONTROLS_PD_MEAS_TIME_MASK   GENMASK(3, 0)
#define LAN8814_PD_CONTROLS_PD_MEAS_TIME_VAL    0xb

/* Represents 1ppm adjustment in 2^32 format with
 * each nsec contains 4 clock cycles.
 * The value is calculated as following: (1/1000000)/((2^-32)/4)
 */
#define LAN8814_1PPM_FORMAT                     17179

/* Represents 1ppm adjustment in 2^32 format with
 * each nsec contains 8 clock cycles.
 * The value is calculated as following: (1/1000000)/((2^-32)/8)
 */
#define LAN8841_1PPM_FORMAT                     34360

#define PTP_RX_VERSION                          0x0248
#define PTP_TX_VERSION                          0x0288
#define PTP_MAX_VERSION(x)                      (((x) & GENMASK(7, 0)) << 8)
#define PTP_MIN_VERSION(x)                      ((x) & GENMASK(7, 0))

#define PTP_RX_MOD                              0x024F
#define PTP_RX_MOD_BAD_UDPV4_CHKSUM_FORCE_FCS_DIS_ BIT(3)
#define PTP_RX_TIMESTAMP_EN                     0x024D
#define PTP_TX_TIMESTAMP_EN                     0x028D

#define PTP_TIMESTAMP_EN_SYNC_                  BIT(0)
#define PTP_TIMESTAMP_EN_DREQ_                  BIT(1)
#define PTP_TIMESTAMP_EN_PDREQ_                 BIT(2)
#define PTP_TIMESTAMP_EN_PDRES_                 BIT(3)

#define PTP_TX_PARSE_L2_ADDR_EN                 0x0284
#define PTP_RX_PARSE_L2_ADDR_EN                 0x0244

#define PTP_TX_PARSE_IP_ADDR_EN                 0x0285
#define PTP_RX_PARSE_IP_ADDR_EN                 0x0245
#define LTC_HARD_RESET                          0x023F
#define LTC_HARD_RESET_                         BIT(0)

#define TSU_HARD_RESET                          0x02C1
#define TSU_HARD_RESET_                         BIT(0)

#define PTP_CMD_CTL                             0x0200
#define PTP_CMD_CTL_PTP_DISABLE_                BIT(0)
#define PTP_CMD_CTL_PTP_ENABLE_                 BIT(1)
#define PTP_CMD_CTL_PTP_CLOCK_READ_             BIT(3)
#define PTP_CMD_CTL_PTP_CLOCK_LOAD_             BIT(4)
#define PTP_CMD_CTL_PTP_LTC_STEP_SEC_           BIT(5)
#define PTP_CMD_CTL_PTP_LTC_STEP_NSEC_          BIT(6)

#define PTP_COMMON_INT_ENA                      0x0204
#define PTP_COMMON_INT_ENA_GPIO_CAP_EN          BIT(2)

#define PTP_CLOCK_SET_SEC_HI                    0x0205
#define PTP_CLOCK_SET_SEC_MID                   0x0206
#define PTP_CLOCK_SET_SEC_LO                    0x0207
#define PTP_CLOCK_SET_NS_HI                     0x0208
#define PTP_CLOCK_SET_NS_LO                     0x0209

#define PTP_CLOCK_READ_SEC_HI                   0x0229
#define PTP_CLOCK_READ_SEC_MID                  0x022A
#define PTP_CLOCK_READ_SEC_LO                   0x022B
#define PTP_CLOCK_READ_NS_HI                    0x022C
#define PTP_CLOCK_READ_NS_LO                    0x022D

#define PTP_GPIO_SEL                            0x0230
#define PTP_GPIO_SEL_GPIO_SEL(pin)              ((pin) << 8)
#define PTP_GPIO_CAP_MAP_LO                     0x0232

#define PTP_GPIO_CAP_EN                         0x0233
#define PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(gpio)    BIT(gpio)
#define PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(gpio)    (BIT(gpio) << 8)

#define PTP_GPIO_RE_LTC_SEC_HI_CAP              0x0235
#define PTP_GPIO_RE_LTC_SEC_LO_CAP              0x0236
#define PTP_GPIO_RE_LTC_NS_HI_CAP               0x0237
#define PTP_GPIO_RE_LTC_NS_LO_CAP               0x0238
#define PTP_GPIO_FE_LTC_SEC_HI_CAP              0x0239
#define PTP_GPIO_FE_LTC_SEC_LO_CAP              0x023A
#define PTP_GPIO_FE_LTC_NS_HI_CAP               0x023B
#define PTP_GPIO_FE_LTC_NS_LO_CAP               0x023C

#define PTP_GPIO_CAP_STS                        0x023D
#define PTP_GPIO_CAP_STS_PTP_GPIO_RE_STS(gpio)  BIT(gpio)
#define PTP_GPIO_CAP_STS_PTP_GPIO_FE_STS(gpio)  (BIT(gpio) << 8)

#define PTP_OPERATING_MODE                      0x0241
#define PTP_OPERATING_MODE_STANDALONE_          BIT(0)

#define PTP_TX_MOD                              0x028F
#define PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_       BIT(12)
#define PTP_TX_MOD_BAD_UDPV4_CHKSUM_FORCE_FCS_DIS_ BIT(3)

#define PTP_RX_PARSE_CONFIG                     0x0242
#define PTP_RX_PARSE_CONFIG_LAYER2_EN_          BIT(0)
#define PTP_RX_PARSE_CONFIG_IPV4_EN_            BIT(1)
#define PTP_RX_PARSE_CONFIG_IPV6_EN_            BIT(2)

#define PTP_TX_PARSE_CONFIG                     0x0282
#define PTP_TX_PARSE_CONFIG_LAYER2_EN_          BIT(0)
#define PTP_TX_PARSE_CONFIG_IPV4_EN_            BIT(1)
#define PTP_TX_PARSE_CONFIG_IPV6_EN_            BIT(2)

#define PTP_CLOCK_RATE_ADJ_HI                   0x020C
#define PTP_CLOCK_RATE_ADJ_LO                   0x020D
#define PTP_CLOCK_RATE_ADJ_DIR_                 BIT(15)

#define PTP_LTC_STEP_ADJ_HI                     0x0212
#define PTP_LTC_STEP_ADJ_LO                     0x0213
#define PTP_LTC_STEP_ADJ_DIR_                   BIT(15)

#define LAN8814_INTR_STS_REG                    0x0033
#define LAN8814_INTR_STS_REG_1588_TSU0_         BIT(0)
#define LAN8814_INTR_STS_REG_1588_TSU1_         BIT(1)
#define LAN8814_INTR_STS_REG_1588_TSU2_         BIT(2)
#define LAN8814_INTR_STS_REG_1588_TSU3_         BIT(3)

#define PTP_CAP_INFO                            0x022A
#define PTP_CAP_INFO_TX_TS_CNT_GET_(reg_val)    (((reg_val) & 0x0f00) >> 8)
#define PTP_CAP_INFO_RX_TS_CNT_GET_(reg_val)    ((reg_val) & 0x000f)

#define PTP_TX_EGRESS_SEC_HI                    0x0296
#define PTP_TX_EGRESS_SEC_LO                    0x0297
#define PTP_TX_EGRESS_NS_HI                     0x0294
#define PTP_TX_EGRESS_NS_LO                     0x0295
#define PTP_TX_MSG_HEADER2                      0x0299

#define PTP_RX_INGRESS_SEC_HI                   0x0256
#define PTP_RX_INGRESS_SEC_LO                   0x0257
#define PTP_RX_INGRESS_NS_HI                    0x0254
#define PTP_RX_INGRESS_NS_LO                    0x0255
#define PTP_RX_MSG_HEADER2                      0x0259

#define PTP_TSU_INT_EN                          0x0200
#define PTP_TSU_INT_EN_PTP_TX_TS_OVRFL_EN_      BIT(3)
#define PTP_TSU_INT_EN_PTP_TX_TS_EN_            BIT(2)
#define PTP_TSU_INT_EN_PTP_RX_TS_OVRFL_EN_      BIT(1)
#define PTP_TSU_INT_EN_PTP_RX_TS_EN_            BIT(0)

#define PTP_TSU_INT_STS                         0x0201
#define PTP_TSU_INT_STS_PTP_TX_TS_OVRFL_INT_    BIT(3)
#define PTP_TSU_INT_STS_PTP_TX_TS_EN_           BIT(2)
#define PTP_TSU_INT_STS_PTP_RX_TS_OVRFL_INT_    BIT(1)
#define PTP_TSU_INT_STS_PTP_RX_TS_EN_           BIT(0)

#define LAN8814_LED_CTRL_1                      0x0
#define LAN8814_LED_CTRL_1_KSZ9031_LED_MODE_    BIT(6)

/* PHY Control 1 */
#define MII_KSZPHY_CTRL_1                       0x1e
#define KSZ8081_CTRL1_MDIX_STAT                 BIT(4)

/* PHY Control 2 / PHY Control (if no PHY Control 1) */
#define MII_KSZPHY_CTRL_2                       0x1f
#define MII_KSZPHY_CTRL                         MII_KSZPHY_CTRL_2
/* bitmap of PHY register to set interrupt mode */
#define KSZ8081_CTRL2_HP_MDIX                   BIT(15)
#define KSZ8081_CTRL2_MDI_MDI_X_SELECT          BIT(14)
#define KSZ8081_CTRL2_DISABLE_AUTO_MDIX         BIT(13)
#define KSZ8081_CTRL2_FORCE_LINK                BIT(11)
#define KSZ8081_CTRL2_POWER_SAVING              BIT(10)
#define KSZPHY_CTRL_INT_ACTIVE_HIGH             BIT(9)
#define KSZPHY_RMII_REF_CLK_SEL                 BIT(7)

/* Write/read to/from extended registers */
#define MII_KSZPHY_EXTREG                       0x0b
#define KSZPHY_EXTREG_WRITE                     0x8000

#define MII_KSZPHY_EXTREG_WRITE                 0x0c
#define MII_KSZPHY_EXTREG_READ                  0x0d

/* Extended registers */
#define MII_KSZPHY_CLK_CONTROL_PAD_SKEW         0x104
#define MII_KSZPHY_RX_DATA_PAD_SKEW             0x105
#define MII_KSZPHY_TX_DATA_PAD_SKEW             0x106

#define PS_TO_REG                               200
#define FIFO_SIZE                               8

#define LAN8814_PTP_GPIO_NUM                    24
#define LAN8814_PTP_PEROUT_NUM                  2
#define LAN8814_PTP_EXTTS_NUM                   3

#define LAN8814_BUFFER_TIME                     2

#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_200MS      13
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100MS      12
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50MS       11
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10MS       10
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5MS        9
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1MS        8
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500US      7
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100US      6
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50US       5
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10US       4
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5US        3
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1US        2
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500NS      1
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100NS      0

#define LAN8814_GPIO_EN1                        0x20
#define LAN8814_GPIO_EN2                        0x21
#define LAN8814_GPIO_DIR1                       0x22
#define LAN8814_GPIO_DIR2                       0x23
#define LAN8814_GPIO_BUF1                       0x24
#define LAN8814_GPIO_BUF2                       0x25

#define LAN8814_GPIO_EN_ADDR(pin) \
        ((pin) > 15 ? LAN8814_GPIO_EN1 : LAN8814_GPIO_EN2)
#define LAN8814_GPIO_EN_BIT(pin)                BIT(pin)
#define LAN8814_GPIO_DIR_ADDR(pin) \
        ((pin) > 15 ? LAN8814_GPIO_DIR1 : LAN8814_GPIO_DIR2)
#define LAN8814_GPIO_DIR_BIT(pin)               BIT(pin)
#define LAN8814_GPIO_BUF_ADDR(pin) \
        ((pin) > 15 ? LAN8814_GPIO_BUF1 : LAN8814_GPIO_BUF2)
#define LAN8814_GPIO_BUF_BIT(pin)               BIT(pin)

#define LAN8814_EVENT_A                         0
#define LAN8814_EVENT_B                         1

#define LAN8814_PTP_GENERAL_CONFIG              0x0201
#define LAN8814_PTP_GENERAL_CONFIG_LTC_EVENT_MASK(event) \
        ((event) ? GENMASK(11, 8) : GENMASK(7, 4))
#define LAN8814_PTP_GENERAL_CONFIG_LTC_EVENT_SET(event, value) \
        (((value) & GENMASK(3, 0)) << (4 + ((event) << 2)))
#define LAN8814_PTP_GENERAL_CONFIG_RELOAD_ADD_X(event) \
        ((event) ? BIT(2) : BIT(0))
#define LAN8814_PTP_GENERAL_CONFIG_POLARITY_X(event) \
        ((event) ? BIT(3) : BIT(1))

#define LAN8814_PTP_CLOCK_TARGET_SEC_HI(event)  ((event) ? 0x21F : 0x215)
#define LAN8814_PTP_CLOCK_TARGET_SEC_LO(event)  ((event) ? 0x220 : 0x216)
#define LAN8814_PTP_CLOCK_TARGET_NS_HI(event)   ((event) ? 0x221 : 0x217)
#define LAN8814_PTP_CLOCK_TARGET_NS_LO(event)   ((event) ? 0x222 : 0x218)

#define LAN8814_PTP_CLOCK_TARGET_RELOAD_SEC_HI(event)   ((event) ? 0x223 : 0x219)
#define LAN8814_PTP_CLOCK_TARGET_RELOAD_SEC_LO(event)   ((event) ? 0x224 : 0x21A)
#define LAN8814_PTP_CLOCK_TARGET_RELOAD_NS_HI(event)    ((event) ? 0x225 : 0x21B)
#define LAN8814_PTP_CLOCK_TARGET_RELOAD_NS_LO(event)    ((event) ? 0x226 : 0x21C)

/* Delay used to get the second part from the LTC */
#define LAN8841_GET_SEC_LTC_DELAY               (500 * NSEC_PER_MSEC)

struct kszphy_hw_stat {
        const char *string;
        u8 reg;
        u8 bits;
};

static struct kszphy_hw_stat kszphy_hw_stats[] = {
        { "phy_receive_errors", 21, 16},
        { "phy_idle_errors", 10, 8 },
};

struct kszphy_type {
        u32 led_mode_reg;
        u16 interrupt_level_mask;
        u16 cable_diag_reg;
        unsigned long pair_mask;
        u16 disable_dll_tx_bit;
        u16 disable_dll_rx_bit;
        u16 disable_dll_mask;
        bool has_broadcast_disable;
        bool has_nand_tree_disable;
        bool has_rmii_ref_clk_sel;
};

/* Shared structure between the PHYs of the same package. */
struct lan8814_shared_priv {
        struct phy_device *phydev;
        struct ptp_clock *ptp_clock;
        struct ptp_clock_info ptp_clock_info;
        struct ptp_pin_desc *pin_config;

        /* Lock for ptp_clock */
        struct mutex shared_lock;
};

struct lan8814_ptp_rx_ts {
        struct list_head list;
        u32 seconds;
        u32 nsec;
        u16 seq_id;
};

struct kszphy_ptp_priv {
        struct mii_timestamper mii_ts;
        struct phy_device *phydev;

        struct sk_buff_head tx_queue;
        struct sk_buff_head rx_queue;

        struct list_head rx_ts_list;
        /* Lock for Rx ts fifo */
        spinlock_t rx_ts_lock;

        int hwts_tx_type;
        enum hwtstamp_rx_filters rx_filter;
        int layer;
        int version;

        struct ptp_clock *ptp_clock;
        struct ptp_clock_info ptp_clock_info;
        /* Lock for ptp_clock */
        struct mutex ptp_lock;
        struct ptp_pin_desc *pin_config;

        s64 seconds;
        /* Lock for accessing seconds */
        spinlock_t seconds_lock;
};

struct kszphy_priv {
        struct kszphy_ptp_priv ptp_priv;
        const struct kszphy_type *type;
        struct clk *clk;
        int led_mode;
        u16 vct_ctrl1000;
        bool rmii_ref_clk_sel;
        bool rmii_ref_clk_sel_val;
        bool clk_enable;
        u64 stats[ARRAY_SIZE(kszphy_hw_stats)];
};

static const struct kszphy_type lan8814_type = {
        .led_mode_reg           = ~LAN8814_LED_CTRL_1,
        .cable_diag_reg         = LAN8814_CABLE_DIAG,
        .pair_mask              = LAN8814_WIRE_PAIR_MASK,
};

static const struct kszphy_type ksz886x_type = {
        .cable_diag_reg         = KSZ8081_LMD,
        .pair_mask              = KSZPHY_WIRE_PAIR_MASK,
};

static const struct kszphy_type ksz8021_type = {
        .led_mode_reg           = MII_KSZPHY_CTRL_2,
        .has_broadcast_disable  = true,
        .has_nand_tree_disable  = true,
        .has_rmii_ref_clk_sel   = true,
};

static const struct kszphy_type ksz8041_type = {
        .led_mode_reg           = MII_KSZPHY_CTRL_1,
};

static const struct kszphy_type ksz8051_type = {
        .led_mode_reg           = MII_KSZPHY_CTRL_2,
        .has_nand_tree_disable  = true,
};

static const struct kszphy_type ksz8081_type = {
        .led_mode_reg           = MII_KSZPHY_CTRL_2,
        .has_broadcast_disable  = true,
        .has_nand_tree_disable  = true,
        .has_rmii_ref_clk_sel   = true,
};

static const struct kszphy_type ks8737_type = {
        .interrupt_level_mask   = BIT(14),
};

static const struct kszphy_type ksz9021_type = {
        .interrupt_level_mask   = BIT(14),
};

static const struct kszphy_type ksz9131_type = {
        .interrupt_level_mask   = BIT(14),
        .disable_dll_tx_bit     = BIT(12),
        .disable_dll_rx_bit     = BIT(12),
        .disable_dll_mask       = BIT_MASK(12),
};

static const struct kszphy_type lan8841_type = {
        .disable_dll_tx_bit     = BIT(14),
        .disable_dll_rx_bit     = BIT(14),
        .disable_dll_mask       = BIT_MASK(14),
        .cable_diag_reg         = LAN8814_CABLE_DIAG,
        .pair_mask              = LAN8814_WIRE_PAIR_MASK,
};

static int kszphy_extended_write(struct phy_device *phydev,
                                u32 regnum, u16 val)
{
        phy_write(phydev, MII_KSZPHY_EXTREG, KSZPHY_EXTREG_WRITE | regnum);
        return phy_write(phydev, MII_KSZPHY_EXTREG_WRITE, val);
}

static int kszphy_extended_read(struct phy_device *phydev,
                                u32 regnum)
{
        phy_write(phydev, MII_KSZPHY_EXTREG, regnum);
        return phy_read(phydev, MII_KSZPHY_EXTREG_READ);
}

static int kszphy_ack_interrupt(struct phy_device *phydev)
{
        /* bit[7..0] int status, which is a read and clear register. */
        int rc;

        rc = phy_read(phydev, MII_KSZPHY_INTCS);

        return (rc < 0) ? rc : 0;
}

static int kszphy_config_intr(struct phy_device *phydev)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        int temp, err;
        u16 mask;

        if (type && type->interrupt_level_mask)
                mask = type->interrupt_level_mask;
        else
                mask = KSZPHY_CTRL_INT_ACTIVE_HIGH;

        /* set the interrupt pin active low */
        temp = phy_read(phydev, MII_KSZPHY_CTRL);
        if (temp < 0)
                return temp;
        temp &= ~mask;
        phy_write(phydev, MII_KSZPHY_CTRL, temp);

        /* enable / disable interrupts */
        if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
                err = kszphy_ack_interrupt(phydev);
                if (err)
                        return err;

                err = phy_write(phydev, MII_KSZPHY_INTCS, KSZPHY_INTCS_ALL);
        } else {
                err = phy_write(phydev, MII_KSZPHY_INTCS, 0);
                if (err)
                        return err;

                err = kszphy_ack_interrupt(phydev);
        }

        return err;
}

static irqreturn_t kszphy_handle_interrupt(struct phy_device *phydev)
{
        int irq_status;

        irq_status = phy_read(phydev, MII_KSZPHY_INTCS);
        if (irq_status < 0) {
                phy_error(phydev);
                return IRQ_NONE;
        }

        if (!(irq_status & KSZPHY_INTCS_STATUS))
                return IRQ_NONE;

        phy_trigger_machine(phydev);

        return IRQ_HANDLED;
}

static int kszphy_rmii_clk_sel(struct phy_device *phydev, bool val)
{
        int ctrl;

        ctrl = phy_read(phydev, MII_KSZPHY_CTRL);
        if (ctrl < 0)
                return ctrl;

        if (val)
                ctrl |= KSZPHY_RMII_REF_CLK_SEL;
        else
                ctrl &= ~KSZPHY_RMII_REF_CLK_SEL;

        return phy_write(phydev, MII_KSZPHY_CTRL, ctrl);
}

static int kszphy_setup_led(struct phy_device *phydev, u32 reg, int val)
{
        int rc, temp, shift;

        switch (reg) {
        case MII_KSZPHY_CTRL_1:
                shift = 14;
                break;
        case MII_KSZPHY_CTRL_2:
                shift = 4;
                break;
        default:
                return -EINVAL;
        }

        temp = phy_read(phydev, reg);
        if (temp < 0) {
                rc = temp;
                goto out;
        }

        temp &= ~(3 << shift);
        temp |= val << shift;
        rc = phy_write(phydev, reg, temp);
out:
        if (rc < 0)
                phydev_err(phydev, "failed to set led mode\n");

        return rc;
}

/* Disable PHY address 0 as the broadcast address, so that it can be used as a
 * unique (non-broadcast) address on a shared bus.
 */
static int kszphy_broadcast_disable(struct phy_device *phydev)
{
        int ret;

        ret = phy_read(phydev, MII_KSZPHY_OMSO);
        if (ret < 0)
                goto out;

        ret = phy_write(phydev, MII_KSZPHY_OMSO, ret | KSZPHY_OMSO_B_CAST_OFF);
out:
        if (ret)
                phydev_err(phydev, "failed to disable broadcast address\n");

        return ret;
}

static int kszphy_nand_tree_disable(struct phy_device *phydev)
{
        int ret;

        ret = phy_read(phydev, MII_KSZPHY_OMSO);
        if (ret < 0)
                goto out;

        if (!(ret & KSZPHY_OMSO_NAND_TREE_ON))
                return 0;

        ret = phy_write(phydev, MII_KSZPHY_OMSO,
                        ret & ~KSZPHY_OMSO_NAND_TREE_ON);
out:
        if (ret)
                phydev_err(phydev, "failed to disable NAND tree mode\n");

        return ret;
}

/* Some config bits need to be set again on resume, handle them here. */
static int kszphy_config_reset(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;
        int ret;

        if (priv->rmii_ref_clk_sel) {
                ret = kszphy_rmii_clk_sel(phydev, priv->rmii_ref_clk_sel_val);
                if (ret) {
                        phydev_err(phydev,
                                   "failed to set rmii reference clock\n");
                        return ret;
                }
        }

        if (priv->type && priv->led_mode >= 0)
                kszphy_setup_led(phydev, priv->type->led_mode_reg, priv->led_mode);

        return 0;
}

static int kszphy_config_init(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;
        const struct kszphy_type *type;

        if (!priv)
                return 0;

        type = priv->type;

        if (type && type->has_broadcast_disable)
                kszphy_broadcast_disable(phydev);

        if (type && type->has_nand_tree_disable)
                kszphy_nand_tree_disable(phydev);

        return kszphy_config_reset(phydev);
}

static int ksz8041_fiber_mode(struct phy_device *phydev)
{
        struct device_node *of_node = phydev->mdio.dev.of_node;

        return of_property_read_bool(of_node, "micrel,fiber-mode");
}

static int ksz8041_config_init(struct phy_device *phydev)
{
        __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };

        /* Limit supported and advertised modes in fiber mode */
        if (ksz8041_fiber_mode(phydev)) {
                phydev->dev_flags |= MICREL_PHY_FXEN;
                linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, mask);
                linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, mask);

                linkmode_and(phydev->supported, phydev->supported, mask);
                linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
                                 phydev->supported);
                linkmode_and(phydev->advertising, phydev->advertising, mask);
                linkmode_set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT,
                                 phydev->advertising);
                phydev->autoneg = AUTONEG_DISABLE;
        }

        return kszphy_config_init(phydev);
}

static int ksz8041_config_aneg(struct phy_device *phydev)
{
        /* Skip auto-negotiation in fiber mode */
        if (phydev->dev_flags & MICREL_PHY_FXEN) {
                phydev->speed = SPEED_100;
                return 0;
        }

        return genphy_config_aneg(phydev);
}

static int ksz8051_ksz8795_match_phy_device(struct phy_device *phydev,
                                            const bool ksz_8051)
{
        int ret;

        if (!phy_id_compare(phydev->phy_id, PHY_ID_KSZ8051, MICREL_PHY_ID_MASK))
                return 0;

        ret = phy_read(phydev, MII_BMSR);
        if (ret < 0)
                return ret;

        /* KSZ8051 PHY and KSZ8794/KSZ8795/KSZ8765 switch share the same
         * exact PHY ID. However, they can be told apart by the extended
         * capability registers presence. The KSZ8051 PHY has them while
         * the switch does not.
         */
        ret &= BMSR_ERCAP;
        if (ksz_8051)
                return ret;
        else
                return !ret;
}

static int ksz8051_match_phy_device(struct phy_device *phydev)
{
        return ksz8051_ksz8795_match_phy_device(phydev, true);
}

static int ksz8081_config_init(struct phy_device *phydev)
{
        /* KSZPHY_OMSO_FACTORY_TEST is set at de-assertion of the reset line
         * based on the RXER (KSZ8081RNA/RND) or TXC (KSZ8081MNX/RNB) pin. If a
         * pull-down is missing, the factory test mode should be cleared by
         * manually writing a 0.
         */
        phy_clear_bits(phydev, MII_KSZPHY_OMSO, KSZPHY_OMSO_FACTORY_TEST);

        return kszphy_config_init(phydev);
}

static int ksz8081_config_mdix(struct phy_device *phydev, u8 ctrl)
{
        u16 val;

        switch (ctrl) {
        case ETH_TP_MDI:
                val = KSZ8081_CTRL2_DISABLE_AUTO_MDIX;
                break;
        case ETH_TP_MDI_X:
                val = KSZ8081_CTRL2_DISABLE_AUTO_MDIX |
                        KSZ8081_CTRL2_MDI_MDI_X_SELECT;
                break;
        case ETH_TP_MDI_AUTO:
                val = 0;
                break;
        default:
                return 0;
        }

        return phy_modify(phydev, MII_KSZPHY_CTRL_2,
                          KSZ8081_CTRL2_HP_MDIX |
                          KSZ8081_CTRL2_MDI_MDI_X_SELECT |
                          KSZ8081_CTRL2_DISABLE_AUTO_MDIX,
                          KSZ8081_CTRL2_HP_MDIX | val);
}

static int ksz8081_config_aneg(struct phy_device *phydev)
{
        int ret;

        ret = genphy_config_aneg(phydev);
        if (ret)
                return ret;

        /* The MDI-X configuration is automatically changed by the PHY after
         * switching from autoneg off to on. So, take MDI-X configuration under
         * own control and set it after autoneg configuration was done.
         */
        return ksz8081_config_mdix(phydev, phydev->mdix_ctrl);
}

static int ksz8081_mdix_update(struct phy_device *phydev)
{
        int ret;

        ret = phy_read(phydev, MII_KSZPHY_CTRL_2);
        if (ret < 0)
                return ret;

        if (ret & KSZ8081_CTRL2_DISABLE_AUTO_MDIX) {
                if (ret & KSZ8081_CTRL2_MDI_MDI_X_SELECT)
                        phydev->mdix_ctrl = ETH_TP_MDI_X;
                else
                        phydev->mdix_ctrl = ETH_TP_MDI;
        } else {
                phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
        }

        ret = phy_read(phydev, MII_KSZPHY_CTRL_1);
        if (ret < 0)
                return ret;

        if (ret & KSZ8081_CTRL1_MDIX_STAT)
                phydev->mdix = ETH_TP_MDI;
        else
                phydev->mdix = ETH_TP_MDI_X;

        return 0;
}

static int ksz8081_read_status(struct phy_device *phydev)
{
        int ret;

        ret = ksz8081_mdix_update(phydev);
        if (ret < 0)
                return ret;

        return genphy_read_status(phydev);
}

static int ksz8061_config_init(struct phy_device *phydev)
{
        int ret;

        /* Chip can be powered down by the bootstrap code. */
        ret = phy_read(phydev, MII_BMCR);
        if (ret < 0)
                return ret;
        if (ret & BMCR_PDOWN) {
                ret = phy_write(phydev, MII_BMCR, ret & ~BMCR_PDOWN);
                if (ret < 0)
                        return ret;
                usleep_range(1000, 2000);
        }

        ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_DEVID1, 0xB61A);
        if (ret)
                return ret;

        return kszphy_config_init(phydev);
}

static int ksz8795_match_phy_device(struct phy_device *phydev)
{
        return ksz8051_ksz8795_match_phy_device(phydev, false);
}

static int ksz9021_load_values_from_of(struct phy_device *phydev,
                                       const struct device_node *of_node,
                                       u16 reg,
                                       const char *field1, const char *field2,
                                       const char *field3, const char *field4)
{
        int val1 = -1;
        int val2 = -2;
        int val3 = -3;
        int val4 = -4;
        int newval;
        int matches = 0;

        if (!of_property_read_u32(of_node, field1, &val1))
                matches++;

        if (!of_property_read_u32(of_node, field2, &val2))
                matches++;

        if (!of_property_read_u32(of_node, field3, &val3))
                matches++;

        if (!of_property_read_u32(of_node, field4, &val4))
                matches++;

        if (!matches)
                return 0;

        if (matches < 4)
                newval = kszphy_extended_read(phydev, reg);
        else
                newval = 0;

        if (val1 != -1)
                newval = ((newval & 0xfff0) | ((val1 / PS_TO_REG) & 0xf) << 0);

        if (val2 != -2)
                newval = ((newval & 0xff0f) | ((val2 / PS_TO_REG) & 0xf) << 4);

        if (val3 != -3)
                newval = ((newval & 0xf0ff) | ((val3 / PS_TO_REG) & 0xf) << 8);

        if (val4 != -4)
                newval = ((newval & 0x0fff) | ((val4 / PS_TO_REG) & 0xf) << 12);

        return kszphy_extended_write(phydev, reg, newval);
}

static int ksz9021_config_init(struct phy_device *phydev)
{
        const struct device_node *of_node;
        const struct device *dev_walker;

        /* The Micrel driver has a deprecated option to place phy OF
         * properties in the MAC node. Walk up the tree of devices to
         * find a device with an OF node.
         */
        dev_walker = &phydev->mdio.dev;
        do {
                of_node = dev_walker->of_node;
                dev_walker = dev_walker->parent;

        } while (!of_node && dev_walker);

        if (of_node) {
                ksz9021_load_values_from_of(phydev, of_node,
                                    MII_KSZPHY_CLK_CONTROL_PAD_SKEW,
                                    "txen-skew-ps", "txc-skew-ps",
                                    "rxdv-skew-ps", "rxc-skew-ps");
                ksz9021_load_values_from_of(phydev, of_node,
                                    MII_KSZPHY_RX_DATA_PAD_SKEW,
                                    "rxd0-skew-ps", "rxd1-skew-ps",
                                    "rxd2-skew-ps", "rxd3-skew-ps");
                ksz9021_load_values_from_of(phydev, of_node,
                                    MII_KSZPHY_TX_DATA_PAD_SKEW,
                                    "txd0-skew-ps", "txd1-skew-ps",
                                    "txd2-skew-ps", "txd3-skew-ps");
        }
        return 0;
}

#define KSZ9031_PS_TO_REG               60

/* Extended registers */
/* MMD Address 0x0 */
#define MII_KSZ9031RN_FLP_BURST_TX_LO   3
#define MII_KSZ9031RN_FLP_BURST_TX_HI   4

/* MMD Address 0x2 */
#define MII_KSZ9031RN_CONTROL_PAD_SKEW  4
#define MII_KSZ9031RN_RX_CTL_M          GENMASK(7, 4)
#define MII_KSZ9031RN_TX_CTL_M          GENMASK(3, 0)

#define MII_KSZ9031RN_RX_DATA_PAD_SKEW  5
#define MII_KSZ9031RN_RXD3              GENMASK(15, 12)
#define MII_KSZ9031RN_RXD2              GENMASK(11, 8)
#define MII_KSZ9031RN_RXD1              GENMASK(7, 4)
#define MII_KSZ9031RN_RXD0              GENMASK(3, 0)

#define MII_KSZ9031RN_TX_DATA_PAD_SKEW  6
#define MII_KSZ9031RN_TXD3              GENMASK(15, 12)
#define MII_KSZ9031RN_TXD2              GENMASK(11, 8)
#define MII_KSZ9031RN_TXD1              GENMASK(7, 4)
#define MII_KSZ9031RN_TXD0              GENMASK(3, 0)

#define MII_KSZ9031RN_CLK_PAD_SKEW      8
#define MII_KSZ9031RN_GTX_CLK           GENMASK(9, 5)
#define MII_KSZ9031RN_RX_CLK            GENMASK(4, 0)

/* KSZ9031 has internal RGMII_IDRX = 1.2ns and RGMII_IDTX = 0ns. To
 * provide different RGMII options we need to configure delay offset
 * for each pad relative to build in delay.
 */
/* keep rx as "No delay adjustment" and set rx_clk to +0.60ns to get delays of
 * 1.80ns
 */
#define RX_ID                           0x7
#define RX_CLK_ID                       0x19

/* set rx to +0.30ns and rx_clk to -0.90ns to compensate the
 * internal 1.2ns delay.
 */
#define RX_ND                           0xc
#define RX_CLK_ND                       0x0

/* set tx to -0.42ns and tx_clk to +0.96ns to get 1.38ns delay */
#define TX_ID                           0x0
#define TX_CLK_ID                       0x1f

/* set tx and tx_clk to "No delay adjustment" to keep 0ns
 * dealy
 */
#define TX_ND                           0x7
#define TX_CLK_ND                       0xf

/* MMD Address 0x1C */
#define MII_KSZ9031RN_EDPD              0x23
#define MII_KSZ9031RN_EDPD_ENABLE       BIT(0)

static int ksz9031_of_load_skew_values(struct phy_device *phydev,
                                       const struct device_node *of_node,
                                       u16 reg, size_t field_sz,
                                       const char *field[], u8 numfields,
                                       bool *update)
{
        int val[4] = {-1, -2, -3, -4};
        int matches = 0;
        u16 mask;
        u16 maxval;
        u16 newval;
        int i;

        for (i = 0; i < numfields; i++)
                if (!of_property_read_u32(of_node, field[i], val + i))
                        matches++;

        if (!matches)
                return 0;

        *update |= true;

        if (matches < numfields)
                newval = phy_read_mmd(phydev, 2, reg);
        else
                newval = 0;

        maxval = (field_sz == 4) ? 0xf : 0x1f;
        for (i = 0; i < numfields; i++)
                if (val[i] != -(i + 1)) {
                        mask = 0xffff;
                        mask ^= maxval << (field_sz * i);
                        newval = (newval & mask) |
                                (((val[i] / KSZ9031_PS_TO_REG) & maxval)
                                        << (field_sz * i));
                }

        return phy_write_mmd(phydev, 2, reg, newval);
}

/* Center KSZ9031RNX FLP timing at 16ms. */
static int ksz9031_center_flp_timing(struct phy_device *phydev)
{
        int result;

        result = phy_write_mmd(phydev, 0, MII_KSZ9031RN_FLP_BURST_TX_HI,
                               0x0006);
        if (result)
                return result;

        result = phy_write_mmd(phydev, 0, MII_KSZ9031RN_FLP_BURST_TX_LO,
                               0x1A80);
        if (result)
                return result;

        return genphy_restart_aneg(phydev);
}

/* Enable energy-detect power-down mode */
static int ksz9031_enable_edpd(struct phy_device *phydev)
{
        int reg;

        reg = phy_read_mmd(phydev, 0x1C, MII_KSZ9031RN_EDPD);
        if (reg < 0)
                return reg;
        return phy_write_mmd(phydev, 0x1C, MII_KSZ9031RN_EDPD,
                             reg | MII_KSZ9031RN_EDPD_ENABLE);
}

static int ksz9031_config_rgmii_delay(struct phy_device *phydev)
{
        u16 rx, tx, rx_clk, tx_clk;
        int ret;

        switch (phydev->interface) {
        case PHY_INTERFACE_MODE_RGMII:
                tx = TX_ND;
                tx_clk = TX_CLK_ND;
                rx = RX_ND;
                rx_clk = RX_CLK_ND;
                break;
        case PHY_INTERFACE_MODE_RGMII_ID:
                tx = TX_ID;
                tx_clk = TX_CLK_ID;
                rx = RX_ID;
                rx_clk = RX_CLK_ID;
                break;
        case PHY_INTERFACE_MODE_RGMII_RXID:
                tx = TX_ND;
                tx_clk = TX_CLK_ND;
                rx = RX_ID;
                rx_clk = RX_CLK_ID;
                break;
        case PHY_INTERFACE_MODE_RGMII_TXID:
                tx = TX_ID;
                tx_clk = TX_CLK_ID;
                rx = RX_ND;
                rx_clk = RX_CLK_ND;
                break;
        default:
                return 0;
        }

        ret = phy_write_mmd(phydev, 2, MII_KSZ9031RN_CONTROL_PAD_SKEW,
                            FIELD_PREP(MII_KSZ9031RN_RX_CTL_M, rx) |
                            FIELD_PREP(MII_KSZ9031RN_TX_CTL_M, tx));
        if (ret < 0)
                return ret;

        ret = phy_write_mmd(phydev, 2, MII_KSZ9031RN_RX_DATA_PAD_SKEW,
                            FIELD_PREP(MII_KSZ9031RN_RXD3, rx) |
                            FIELD_PREP(MII_KSZ9031RN_RXD2, rx) |
                            FIELD_PREP(MII_KSZ9031RN_RXD1, rx) |
                            FIELD_PREP(MII_KSZ9031RN_RXD0, rx));
        if (ret < 0)
                return ret;

        ret = phy_write_mmd(phydev, 2, MII_KSZ9031RN_TX_DATA_PAD_SKEW,
                            FIELD_PREP(MII_KSZ9031RN_TXD3, tx) |
                            FIELD_PREP(MII_KSZ9031RN_TXD2, tx) |
                            FIELD_PREP(MII_KSZ9031RN_TXD1, tx) |
                            FIELD_PREP(MII_KSZ9031RN_TXD0, tx));
        if (ret < 0)
                return ret;

        return phy_write_mmd(phydev, 2, MII_KSZ9031RN_CLK_PAD_SKEW,
                             FIELD_PREP(MII_KSZ9031RN_GTX_CLK, tx_clk) |
                             FIELD_PREP(MII_KSZ9031RN_RX_CLK, rx_clk));
}

static int ksz9031_config_init(struct phy_device *phydev)
{
        const struct device_node *of_node;
        static const char *clk_skews[2] = {"rxc-skew-ps", "txc-skew-ps"};
        static const char *rx_data_skews[4] = {
                "rxd0-skew-ps", "rxd1-skew-ps",
                "rxd2-skew-ps", "rxd3-skew-ps"
        };
        static const char *tx_data_skews[4] = {
                "txd0-skew-ps", "txd1-skew-ps",
                "txd2-skew-ps", "txd3-skew-ps"
        };
        static const char *control_skews[2] = {"txen-skew-ps", "rxdv-skew-ps"};
        const struct device *dev_walker;
        int result;

        result = ksz9031_enable_edpd(phydev);
        if (result < 0)
                return result;

        /* The Micrel driver has a deprecated option to place phy OF
         * properties in the MAC node. Walk up the tree of devices to
         * find a device with an OF node.
         */
        dev_walker = &phydev->mdio.dev;
        do {
                of_node = dev_walker->of_node;
                dev_walker = dev_walker->parent;
        } while (!of_node && dev_walker);

        if (of_node) {
                bool update = false;

                if (phy_interface_is_rgmii(phydev)) {
                        result = ksz9031_config_rgmii_delay(phydev);
                        if (result < 0)
                                return result;
                }

                ksz9031_of_load_skew_values(phydev, of_node,
                                MII_KSZ9031RN_CLK_PAD_SKEW, 5,
                                clk_skews, 2, &update);

                ksz9031_of_load_skew_values(phydev, of_node,
                                MII_KSZ9031RN_CONTROL_PAD_SKEW, 4,
                                control_skews, 2, &update);

                ksz9031_of_load_skew_values(phydev, of_node,
                                MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4,
                                rx_data_skews, 4, &update);

                ksz9031_of_load_skew_values(phydev, of_node,
                                MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4,
                                tx_data_skews, 4, &update);

                if (update && !phy_interface_is_rgmii(phydev))
                        phydev_warn(phydev,
                                    "*-skew-ps values should be used only with RGMII PHY modes\n");

                /* Silicon Errata Sheet (DS80000691D or DS80000692D):
                 * When the device links in the 1000BASE-T slave mode only,
                 * the optional 125MHz reference output clock (CLK125_NDO)
                 * has wide duty cycle variation.
                 *
                 * The optional CLK125_NDO clock does not meet the RGMII
                 * 45/55 percent (min/max) duty cycle requirement and therefore
                 * cannot be used directly by the MAC side for clocking
                 * applications that have setup/hold time requirements on
                 * rising and falling clock edges.
                 *
                 * Workaround:
                 * Force the phy to be the master to receive a stable clock
                 * which meets the duty cycle requirement.
                 */
                if (of_property_read_bool(of_node, "micrel,force-master")) {
                        result = phy_read(phydev, MII_CTRL1000);
                        if (result < 0)
                                goto err_force_master;

                        /* enable master mode, config & prefer master */
                        result |= CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER;
                        result = phy_write(phydev, MII_CTRL1000, result);
                        if (result < 0)
                                goto err_force_master;
                }
        }

        return ksz9031_center_flp_timing(phydev);

err_force_master:
        phydev_err(phydev, "failed to force the phy to master mode\n");
        return result;
}

#define KSZ9131_SKEW_5BIT_MAX   2400
#define KSZ9131_SKEW_4BIT_MAX   800
#define KSZ9131_OFFSET          700
#define KSZ9131_STEP            100

static int ksz9131_of_load_skew_values(struct phy_device *phydev,
                                       struct device_node *of_node,
                                       u16 reg, size_t field_sz,
                                       char *field[], u8 numfields)
{
        int val[4] = {-(1 + KSZ9131_OFFSET), -(2 + KSZ9131_OFFSET),
                      -(3 + KSZ9131_OFFSET), -(4 + KSZ9131_OFFSET)};
        int skewval, skewmax = 0;
        int matches = 0;
        u16 maxval;
        u16 newval;
        u16 mask;
        int i;

        /* psec properties in dts should mean x pico seconds */
        if (field_sz == 5)
                skewmax = KSZ9131_SKEW_5BIT_MAX;
        else
                skewmax = KSZ9131_SKEW_4BIT_MAX;

        for (i = 0; i < numfields; i++)
                if (!of_property_read_s32(of_node, field[i], &skewval)) {
                        if (skewval < -KSZ9131_OFFSET)
                                skewval = -KSZ9131_OFFSET;
                        else if (skewval > skewmax)
                                skewval = skewmax;

                        val[i] = skewval + KSZ9131_OFFSET;
                        matches++;
                }

        if (!matches)
                return 0;

        if (matches < numfields)
                newval = phy_read_mmd(phydev, 2, reg);
        else
                newval = 0;

        maxval = (field_sz == 4) ? 0xf : 0x1f;
        for (i = 0; i < numfields; i++)
                if (val[i] != -(i + 1 + KSZ9131_OFFSET)) {
                        mask = 0xffff;
                        mask ^= maxval << (field_sz * i);
                        newval = (newval & mask) |
                                (((val[i] / KSZ9131_STEP) & maxval)
                                        << (field_sz * i));
                }

        return phy_write_mmd(phydev, 2, reg, newval);
}

#define KSZ9131RN_MMD_COMMON_CTRL_REG   2
#define KSZ9131RN_RXC_DLL_CTRL          76
#define KSZ9131RN_TXC_DLL_CTRL          77
#define KSZ9131RN_DLL_ENABLE_DELAY      0

static int ksz9131_config_rgmii_delay(struct phy_device *phydev)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        u16 rxcdll_val, txcdll_val;
        int ret;

        switch (phydev->interface) {
        case PHY_INTERFACE_MODE_RGMII:
                rxcdll_val = type->disable_dll_rx_bit;
                txcdll_val = type->disable_dll_tx_bit;
                break;
        case PHY_INTERFACE_MODE_RGMII_ID:
                rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
                txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
                break;
        case PHY_INTERFACE_MODE_RGMII_RXID:
                rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
                txcdll_val = type->disable_dll_tx_bit;
                break;
        case PHY_INTERFACE_MODE_RGMII_TXID:
                rxcdll_val = type->disable_dll_rx_bit;
                txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY;
                break;
        default:
                return 0;
        }

        ret = phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                             KSZ9131RN_RXC_DLL_CTRL, type->disable_dll_mask,
                             rxcdll_val);
        if (ret < 0)
                return ret;

        return phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                              KSZ9131RN_TXC_DLL_CTRL, type->disable_dll_mask,
                              txcdll_val);
}

/* Silicon Errata DS80000693B
 *
 * When LEDs are configured in Individual Mode, LED1 is ON in a no-link
 * condition. Workaround is to set register 0x1e, bit 9, this way LED1 behaves
 * according to the datasheet (off if there is no link).
 */
static int ksz9131_led_errata(struct phy_device *phydev)
{
        int reg;

        reg = phy_read_mmd(phydev, 2, 0);
        if (reg < 0)
                return reg;

        if (!(reg & BIT(4)))
                return 0;

        return phy_set_bits(phydev, 0x1e, BIT(9));
}

static int ksz9131_config_init(struct phy_device *phydev)
{
        struct device_node *of_node;
        char *clk_skews[2] = {"rxc-skew-psec", "txc-skew-psec"};
        char *rx_data_skews[4] = {
                "rxd0-skew-psec", "rxd1-skew-psec",
                "rxd2-skew-psec", "rxd3-skew-psec"
        };
        char *tx_data_skews[4] = {
                "txd0-skew-psec", "txd1-skew-psec",
                "txd2-skew-psec", "txd3-skew-psec"
        };
        char *control_skews[2] = {"txen-skew-psec", "rxdv-skew-psec"};
        const struct device *dev_walker;
        int ret;

        phydev->mdix_ctrl = ETH_TP_MDI_AUTO;

        dev_walker = &phydev->mdio.dev;
        do {
                of_node = dev_walker->of_node;
                dev_walker = dev_walker->parent;
        } while (!of_node && dev_walker);

        if (!of_node)
                return 0;

        if (phy_interface_is_rgmii(phydev)) {
                ret = ksz9131_config_rgmii_delay(phydev);
                if (ret < 0)
                        return ret;
        }

        ret = ksz9131_of_load_skew_values(phydev, of_node,
                                          MII_KSZ9031RN_CLK_PAD_SKEW, 5,
                                          clk_skews, 2);
        if (ret < 0)
                return ret;

        ret = ksz9131_of_load_skew_values(phydev, of_node,
                                          MII_KSZ9031RN_CONTROL_PAD_SKEW, 4,
                                          control_skews, 2);
        if (ret < 0)
                return ret;

        ret = ksz9131_of_load_skew_values(phydev, of_node,
                                          MII_KSZ9031RN_RX_DATA_PAD_SKEW, 4,
                                          rx_data_skews, 4);
        if (ret < 0)
                return ret;

        ret = ksz9131_of_load_skew_values(phydev, of_node,
                                          MII_KSZ9031RN_TX_DATA_PAD_SKEW, 4,
                                          tx_data_skews, 4);
        if (ret < 0)
                return ret;

        ret = ksz9131_led_errata(phydev);
        if (ret < 0)
                return ret;

        return 0;
}

#define MII_KSZ9131_AUTO_MDIX           0x1C
#define MII_KSZ9131_AUTO_MDI_SET        BIT(7)
#define MII_KSZ9131_AUTO_MDIX_SWAP_OFF  BIT(6)
#define MII_KSZ9131_DIG_AXAN_STS        0x14
#define MII_KSZ9131_DIG_AXAN_STS_LINK_DET       BIT(14)
#define MII_KSZ9131_DIG_AXAN_STS_A_SELECT       BIT(12)

static int ksz9131_mdix_update(struct phy_device *phydev)
{
        int ret;

        if (phydev->mdix_ctrl != ETH_TP_MDI_AUTO) {
                phydev->mdix = phydev->mdix_ctrl;
        } else {
                ret = phy_read(phydev, MII_KSZ9131_DIG_AXAN_STS);
                if (ret < 0)
                        return ret;

                if (ret & MII_KSZ9131_DIG_AXAN_STS_LINK_DET) {
                        if (ret & MII_KSZ9131_DIG_AXAN_STS_A_SELECT)
                                phydev->mdix = ETH_TP_MDI;
                        else
                                phydev->mdix = ETH_TP_MDI_X;
                } else {
                        phydev->mdix = ETH_TP_MDI_INVALID;
                }
        }

        return 0;
}

static int ksz9131_config_mdix(struct phy_device *phydev, u8 ctrl)
{
        u16 val;

        switch (ctrl) {
        case ETH_TP_MDI:
                val = MII_KSZ9131_AUTO_MDIX_SWAP_OFF |
                      MII_KSZ9131_AUTO_MDI_SET;
                break;
        case ETH_TP_MDI_X:
                val = MII_KSZ9131_AUTO_MDIX_SWAP_OFF;
                break;
        case ETH_TP_MDI_AUTO:
                val = 0;
                break;
        default:
                return 0;
        }

        return phy_modify(phydev, MII_KSZ9131_AUTO_MDIX,
                          MII_KSZ9131_AUTO_MDIX_SWAP_OFF |
                          MII_KSZ9131_AUTO_MDI_SET, val);
}

static int ksz9131_read_status(struct phy_device *phydev)
{
        int ret;

        ret = ksz9131_mdix_update(phydev);
        if (ret < 0)
                return ret;

        return genphy_read_status(phydev);
}

static int ksz9131_config_aneg(struct phy_device *phydev)
{
        int ret;

        ret = ksz9131_config_mdix(phydev, phydev->mdix_ctrl);
        if (ret)
                return ret;

        return genphy_config_aneg(phydev);
}

static int ksz9477_get_features(struct phy_device *phydev)
{
        int ret;

        ret = genphy_read_abilities(phydev);
        if (ret)
                return ret;

        /* The "EEE control and capability 1" (Register 3.20) seems to be
         * influenced by the "EEE advertisement 1" (Register 7.60). Changes
         * on the 7.60 will affect 3.20. So, we need to construct our own list
         * of caps.
         * KSZ8563R should have 100BaseTX/Full only.
         */
        linkmode_and(phydev->supported_eee, phydev->supported,
                     PHY_EEE_CAP1_FEATURES);

        return 0;
}

#define KSZ8873MLL_GLOBAL_CONTROL_4     0x06
#define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX      BIT(6)
#define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED       BIT(4)
static int ksz8873mll_read_status(struct phy_device *phydev)
{
        int regval;

        /* dummy read */
        regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);

        regval = phy_read(phydev, KSZ8873MLL_GLOBAL_CONTROL_4);

        if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX)
                phydev->duplex = DUPLEX_HALF;
        else
                phydev->duplex = DUPLEX_FULL;

        if (regval & KSZ8873MLL_GLOBAL_CONTROL_4_SPEED)
                phydev->speed = SPEED_10;
        else
                phydev->speed = SPEED_100;

        phydev->link = 1;
        phydev->pause = phydev->asym_pause = 0;

        return 0;
}

static int ksz9031_get_features(struct phy_device *phydev)
{
        int ret;

        ret = genphy_read_abilities(phydev);
        if (ret < 0)
                return ret;

        /* Silicon Errata Sheet (DS80000691D or DS80000692D):
         * Whenever the device's Asymmetric Pause capability is set to 1,
         * link-up may fail after a link-up to link-down transition.
         *
         * The Errata Sheet is for ksz9031, but ksz9021 has the same issue
         *
         * Workaround:
         * Do not enable the Asymmetric Pause capability bit.
         */
        linkmode_clear_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, phydev->supported);

        /* We force setting the Pause capability as the core will force the
         * Asymmetric Pause capability to 1 otherwise.
         */
        linkmode_set_bit(ETHTOOL_LINK_MODE_Pause_BIT, phydev->supported);

        return 0;
}

static int ksz9031_read_status(struct phy_device *phydev)
{
        int err;
        int regval;

        err = genphy_read_status(phydev);
        if (err)
                return err;

        /* Make sure the PHY is not broken. Read idle error count,
         * and reset the PHY if it is maxed out.
         */
        regval = phy_read(phydev, MII_STAT1000);
        if ((regval & 0xFF) == 0xFF) {
                phy_init_hw(phydev);
                phydev->link = 0;
                if (phydev->drv->config_intr && phy_interrupt_is_valid(phydev))
                        phydev->drv->config_intr(phydev);
                return genphy_config_aneg(phydev);
        }

        return 0;
}

static int ksz9x31_cable_test_start(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;
        int ret;

        /* KSZ9131RNX, DS00002841B-page 38, 4.14 LinkMD (R) Cable Diagnostic
         * Prior to running the cable diagnostics, Auto-negotiation should
         * be disabled, full duplex set and the link speed set to 1000Mbps
         * via the Basic Control Register.
         */
        ret = phy_modify(phydev, MII_BMCR,
                         BMCR_SPEED1000 | BMCR_FULLDPLX |
                         BMCR_ANENABLE | BMCR_SPEED100,
                         BMCR_SPEED1000 | BMCR_FULLDPLX);
        if (ret)
                return ret;

        /* KSZ9131RNX, DS00002841B-page 38, 4.14 LinkMD (R) Cable Diagnostic
         * The Master-Slave configuration should be set to Slave by writing
         * a value of 0x1000 to the Auto-Negotiation Master Slave Control
         * Register.
         */
        ret = phy_read(phydev, MII_CTRL1000);
        if (ret < 0)
                return ret;

        /* Cache these bits, they need to be restored once LinkMD finishes. */
        priv->vct_ctrl1000 = ret & (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER);
        ret &= ~(CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER);
        ret |= CTL1000_ENABLE_MASTER;

        return phy_write(phydev, MII_CTRL1000, ret);
}

static int ksz9x31_cable_test_result_trans(u16 status)
{
        switch (FIELD_GET(KSZ9x31_LMD_VCT_ST_MASK, status)) {
        case KSZ9x31_LMD_VCT_ST_NORMAL:
                return ETHTOOL_A_CABLE_RESULT_CODE_OK;
        case KSZ9x31_LMD_VCT_ST_OPEN:
                return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
        case KSZ9x31_LMD_VCT_ST_SHORT:
                return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
        case KSZ9x31_LMD_VCT_ST_FAIL:
                fallthrough;
        default:
                return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
        }
}

static bool ksz9x31_cable_test_failed(u16 status)
{
        int stat = FIELD_GET(KSZ9x31_LMD_VCT_ST_MASK, status);

        return stat == KSZ9x31_LMD_VCT_ST_FAIL;
}

static bool ksz9x31_cable_test_fault_length_valid(u16 status)
{
        switch (FIELD_GET(KSZ9x31_LMD_VCT_ST_MASK, status)) {
        case KSZ9x31_LMD_VCT_ST_OPEN:
                fallthrough;
        case KSZ9x31_LMD_VCT_ST_SHORT:
                return true;
        }
        return false;
}

static int ksz9x31_cable_test_fault_length(struct phy_device *phydev, u16 stat)
{
        int dt = FIELD_GET(KSZ9x31_LMD_VCT_DATA_MASK, stat);

        /* KSZ9131RNX, DS00002841B-page 38, 4.14 LinkMD (R) Cable Diagnostic
         *
         * distance to fault = (VCT_DATA - 22) * 4 / cable propagation velocity
         */
        if (phydev_id_compare(phydev, PHY_ID_KSZ9131))
                dt = clamp(dt - 22, 0, 255);

        return (dt * 400) / 10;
}

static int ksz9x31_cable_test_wait_for_completion(struct phy_device *phydev)
{
        int val, ret;

        ret = phy_read_poll_timeout(phydev, KSZ9x31_LMD, val,
                                    !(val & KSZ9x31_LMD_VCT_EN),
                                    30000, 100000, true);

        return ret < 0 ? ret : 0;
}

static int ksz9x31_cable_test_get_pair(int pair)
{
        static const int ethtool_pair[] = {
                ETHTOOL_A_CABLE_PAIR_A,
                ETHTOOL_A_CABLE_PAIR_B,
                ETHTOOL_A_CABLE_PAIR_C,
                ETHTOOL_A_CABLE_PAIR_D,
        };

        return ethtool_pair[pair];
}

static int ksz9x31_cable_test_one_pair(struct phy_device *phydev, int pair)
{
        int ret, val;

        /* KSZ9131RNX, DS00002841B-page 38, 4.14 LinkMD (R) Cable Diagnostic
         * To test each individual cable pair, set the cable pair in the Cable
         * Diagnostics Test Pair (VCT_PAIR[1:0]) field of the LinkMD Cable
         * Diagnostic Register, along with setting the Cable Diagnostics Test
         * Enable (VCT_EN) bit. The Cable Diagnostics Test Enable (VCT_EN) bit
         * will self clear when the test is concluded.
         */
        ret = phy_write(phydev, KSZ9x31_LMD,
                        KSZ9x31_LMD_VCT_EN | KSZ9x31_LMD_VCT_PAIR(pair));
        if (ret)
                return ret;

        ret = ksz9x31_cable_test_wait_for_completion(phydev);
        if (ret)
                return ret;

        val = phy_read(phydev, KSZ9x31_LMD);
        if (val < 0)
                return val;

        if (ksz9x31_cable_test_failed(val))
                return -EAGAIN;

        ret = ethnl_cable_test_result(phydev,
                                      ksz9x31_cable_test_get_pair(pair),
                                      ksz9x31_cable_test_result_trans(val));
        if (ret)
                return ret;

        if (!ksz9x31_cable_test_fault_length_valid(val))
                return 0;

        return ethnl_cable_test_fault_length(phydev,
                                             ksz9x31_cable_test_get_pair(pair),
                                             ksz9x31_cable_test_fault_length(phydev, val));
}

static int ksz9x31_cable_test_get_status(struct phy_device *phydev,
                                         bool *finished)
{
        struct kszphy_priv *priv = phydev->priv;
        unsigned long pair_mask = 0xf;
        int retries = 20;
        int pair, ret, rv;

        *finished = false;

        /* Try harder if link partner is active */
        while (pair_mask && retries--) {
                for_each_set_bit(pair, &pair_mask, 4) {
                        ret = ksz9x31_cable_test_one_pair(phydev, pair);
                        if (ret == -EAGAIN)
                                continue;
                        if (ret < 0)
                                return ret;
                        clear_bit(pair, &pair_mask);
                }
                /* If link partner is in autonegotiation mode it will send 2ms
                 * of FLPs with at least 6ms of silence.
                 * Add 2ms sleep to have better chances to hit this silence.
                 */
                if (pair_mask)
                        usleep_range(2000, 3000);
        }

        /* Report remaining unfinished pair result as unknown. */
        for_each_set_bit(pair, &pair_mask, 4) {
                ret = ethnl_cable_test_result(phydev,
                                              ksz9x31_cable_test_get_pair(pair),
                                              ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC);
        }

        *finished = true;

        /* Restore cached bits from before LinkMD got started. */
        rv = phy_modify(phydev, MII_CTRL1000,
                        CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER,
                        priv->vct_ctrl1000);
        if (rv)
                return rv;

        return ret;
}

static int ksz8873mll_config_aneg(struct phy_device *phydev)
{
        return 0;
}

static int ksz886x_config_mdix(struct phy_device *phydev, u8 ctrl)
{
        u16 val;

        switch (ctrl) {
        case ETH_TP_MDI:
                val = KSZ886X_BMCR_DISABLE_AUTO_MDIX;
                break;
        case ETH_TP_MDI_X:
                /* Note: The naming of the bit KSZ886X_BMCR_FORCE_MDI is bit
                 * counter intuitive, the "-X" in "1 = Force MDI" in the data
                 * sheet seems to be missing:
                 * 1 = Force MDI (sic!) (transmit on RX+/RX- pins)
                 * 0 = Normal operation (transmit on TX+/TX- pins)
                 */
                val = KSZ886X_BMCR_DISABLE_AUTO_MDIX | KSZ886X_BMCR_FORCE_MDI;
                break;
        case ETH_TP_MDI_AUTO:
                val = 0;
                break;
        default:
                return 0;
        }

        return phy_modify(phydev, MII_BMCR,
                          KSZ886X_BMCR_HP_MDIX | KSZ886X_BMCR_FORCE_MDI |
                          KSZ886X_BMCR_DISABLE_AUTO_MDIX,
                          KSZ886X_BMCR_HP_MDIX | val);
}

static int ksz886x_config_aneg(struct phy_device *phydev)
{
        int ret;

        ret = genphy_config_aneg(phydev);
        if (ret)
                return ret;

        if (phydev->autoneg != AUTONEG_ENABLE) {
                /* When autonegotation is disabled, we need to manually force
                 * the link state. If we don't do this, the PHY will keep
                 * sending Fast Link Pulses (FLPs) which are part of the
                 * autonegotiation process. This is not desired when
                 * autonegotiation is off.
                 */
                ret = phy_set_bits(phydev, MII_KSZPHY_CTRL,
                                   KSZ886X_CTRL_FORCE_LINK);
                if (ret)
                        return ret;
        } else {
                /* If we had previously forced the link state, we need to
                 * clear KSZ886X_CTRL_FORCE_LINK bit now. Otherwise, the PHY
                 * will not perform autonegotiation.
                 */
                ret = phy_clear_bits(phydev, MII_KSZPHY_CTRL,
                                     KSZ886X_CTRL_FORCE_LINK);
                if (ret)
                        return ret;
        }

        /* The MDI-X configuration is automatically changed by the PHY after
         * switching from autoneg off to on. So, take MDI-X configuration under
         * own control and set it after autoneg configuration was done.
         */
        return ksz886x_config_mdix(phydev, phydev->mdix_ctrl);
}

static int ksz886x_mdix_update(struct phy_device *phydev)
{
        int ret;

        ret = phy_read(phydev, MII_BMCR);
        if (ret < 0)
                return ret;

        if (ret & KSZ886X_BMCR_DISABLE_AUTO_MDIX) {
                if (ret & KSZ886X_BMCR_FORCE_MDI)
                        phydev->mdix_ctrl = ETH_TP_MDI_X;
                else
                        phydev->mdix_ctrl = ETH_TP_MDI;
        } else {
                phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
        }

        ret = phy_read(phydev, MII_KSZPHY_CTRL);
        if (ret < 0)
                return ret;

        /* Same reverse logic as KSZ886X_BMCR_FORCE_MDI */
        if (ret & KSZ886X_CTRL_MDIX_STAT)
                phydev->mdix = ETH_TP_MDI_X;
        else
                phydev->mdix = ETH_TP_MDI;

        return 0;
}

static int ksz886x_read_status(struct phy_device *phydev)
{
        int ret;

        ret = ksz886x_mdix_update(phydev);
        if (ret < 0)
                return ret;

        return genphy_read_status(phydev);
}

struct ksz9477_errata_write {
        u8 dev_addr;
        u8 reg_addr;
        u16 val;
};

static const struct ksz9477_errata_write ksz9477_errata_writes[] = {
         /* Register settings are needed to improve PHY receive performance */
        {0x01, 0x6f, 0xdd0b},
        {0x01, 0x8f, 0x6032},
        {0x01, 0x9d, 0x248c},
        {0x01, 0x75, 0x0060},
        {0x01, 0xd3, 0x7777},
        {0x1c, 0x06, 0x3008},
        {0x1c, 0x08, 0x2000},

        /* Transmit waveform amplitude can be improved (1000BASE-T, 100BASE-TX, 10BASE-Te) */
        {0x1c, 0x04, 0x00d0},

        /* Register settings are required to meet data sheet supply current specifications */
        {0x1c, 0x13, 0x6eff},
        {0x1c, 0x14, 0xe6ff},
        {0x1c, 0x15, 0x6eff},
        {0x1c, 0x16, 0xe6ff},
        {0x1c, 0x17, 0x00ff},
        {0x1c, 0x18, 0x43ff},
        {0x1c, 0x19, 0xc3ff},
        {0x1c, 0x1a, 0x6fff},
        {0x1c, 0x1b, 0x07ff},
        {0x1c, 0x1c, 0x0fff},
        {0x1c, 0x1d, 0xe7ff},
        {0x1c, 0x1e, 0xefff},
        {0x1c, 0x20, 0xeeee},
};

static int ksz9477_phy_errata(struct phy_device *phydev)
{
        int err;
        int i;

        /* Apply PHY settings to address errata listed in
         * KSZ9477, KSZ9897, KSZ9896, KSZ9567, KSZ8565
         * Silicon Errata and Data Sheet Clarification documents.
         *
         * Document notes: Before configuring the PHY MMD registers, it is
         * necessary to set the PHY to 100 Mbps speed with auto-negotiation
         * disabled by writing to register 0xN100-0xN101. After writing the
         * MMD registers, and after all errata workarounds that involve PHY
         * register settings, write register 0xN100-0xN101 again to enable
         * and restart auto-negotiation.
         */
        err = phy_write(phydev, MII_BMCR, BMCR_SPEED100 | BMCR_FULLDPLX);
        if (err)
                return err;

        for (i = 0; i < ARRAY_SIZE(ksz9477_errata_writes); ++i) {
                const struct ksz9477_errata_write *errata = &ksz9477_errata_writes[i];

                err = phy_write_mmd(phydev, errata->dev_addr, errata->reg_addr, errata->val);
                if (err)
                        return err;
        }

        err = genphy_restart_aneg(phydev);
        if (err)
                return err;

        return err;
}

static int ksz9477_config_init(struct phy_device *phydev)
{
        int err;

        /* Only KSZ9897 family of switches needs this fix. */
        if ((phydev->phy_id & 0xf) == 1) {
                err = ksz9477_phy_errata(phydev);
                if (err)
                        return err;
        }

        /* According to KSZ9477 Errata DS80000754C (Module 4) all EEE modes
         * in this switch shall be regarded as broken.
         */
        if (phydev->dev_flags & MICREL_NO_EEE)
                phy_disable_eee(phydev);

        return kszphy_config_init(phydev);
}

static int kszphy_get_sset_count(struct phy_device *phydev)
{
        return ARRAY_SIZE(kszphy_hw_stats);
}

static void kszphy_get_strings(struct phy_device *phydev, u8 *data)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++)
                ethtool_puts(&data, kszphy_hw_stats[i].string);
}

static u64 kszphy_get_stat(struct phy_device *phydev, int i)
{
        struct kszphy_hw_stat stat = kszphy_hw_stats[i];
        struct kszphy_priv *priv = phydev->priv;
        int val;
        u64 ret;

        val = phy_read(phydev, stat.reg);
        if (val < 0) {
                ret = U64_MAX;
        } else {
                val = val & ((1 << stat.bits) - 1);
                priv->stats[i] += val;
                ret = priv->stats[i];
        }

        return ret;
}

static void kszphy_get_stats(struct phy_device *phydev,
                             struct ethtool_stats *stats, u64 *data)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(kszphy_hw_stats); i++)
                data[i] = kszphy_get_stat(phydev, i);
}

static void kszphy_enable_clk(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;

        if (!priv->clk_enable && priv->clk) {
                clk_prepare_enable(priv->clk);
                priv->clk_enable = true;
        }
}

static void kszphy_disable_clk(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;

        if (priv->clk_enable && priv->clk) {
                clk_disable_unprepare(priv->clk);
                priv->clk_enable = false;
        }
}

static int kszphy_generic_resume(struct phy_device *phydev)
{
        kszphy_enable_clk(phydev);

        return genphy_resume(phydev);
}

static int kszphy_generic_suspend(struct phy_device *phydev)
{
        int ret;

        ret = genphy_suspend(phydev);
        if (ret)
                return ret;

        kszphy_disable_clk(phydev);

        return 0;
}

static int kszphy_suspend(struct phy_device *phydev)
{
        /* Disable PHY Interrupts */
        if (phy_interrupt_is_valid(phydev)) {
                phydev->interrupts = PHY_INTERRUPT_DISABLED;
                if (phydev->drv->config_intr)
                        phydev->drv->config_intr(phydev);
        }

        return kszphy_generic_suspend(phydev);
}

static void kszphy_parse_led_mode(struct phy_device *phydev)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        const struct device_node *np = phydev->mdio.dev.of_node;
        struct kszphy_priv *priv = phydev->priv;
        int ret;

        if (type && type->led_mode_reg) {
                ret = of_property_read_u32(np, "micrel,led-mode",
                                           &priv->led_mode);

                if (ret)
                        priv->led_mode = -1;

                if (priv->led_mode > 3) {
                        phydev_err(phydev, "invalid led mode: 0x%02x\n",
                                   priv->led_mode);
                        priv->led_mode = -1;
                }
        } else {
                priv->led_mode = -1;
        }
}

static int kszphy_resume(struct phy_device *phydev)
{
        int ret;

        ret = kszphy_generic_resume(phydev);
        if (ret)
                return ret;

        /* After switching from power-down to normal mode, an internal global
         * reset is automatically generated. Wait a minimum of 1 ms before
         * read/write access to the PHY registers.
         */
        usleep_range(1000, 2000);

        ret = kszphy_config_reset(phydev);
        if (ret)
                return ret;

        /* Enable PHY Interrupts */
        if (phy_interrupt_is_valid(phydev)) {
                phydev->interrupts = PHY_INTERRUPT_ENABLED;
                if (phydev->drv->config_intr)
                        phydev->drv->config_intr(phydev);
        }

        return 0;
}

/* Because of errata DS80000700A, receiver error following software
 * power down. Suspend and resume callbacks only disable and enable
 * external rmii reference clock.
 */
static int ksz8041_resume(struct phy_device *phydev)
{
        kszphy_enable_clk(phydev);

        return 0;
}

static int ksz8041_suspend(struct phy_device *phydev)
{
        kszphy_disable_clk(phydev);

        return 0;
}

static int ksz9477_resume(struct phy_device *phydev)
{
        int ret;

        /* No need to initialize registers if not powered down. */
        ret = phy_read(phydev, MII_BMCR);
        if (ret < 0)
                return ret;
        if (!(ret & BMCR_PDOWN))
                return 0;

        genphy_resume(phydev);

        /* After switching from power-down to normal mode, an internal global
         * reset is automatically generated. Wait a minimum of 1 ms before
         * read/write access to the PHY registers.
         */
        usleep_range(1000, 2000);

        /* Only KSZ9897 family of switches needs this fix. */
        if ((phydev->phy_id & 0xf) == 1) {
                ret = ksz9477_phy_errata(phydev);
                if (ret)
                        return ret;
        }

        /* Enable PHY Interrupts */
        if (phy_interrupt_is_valid(phydev)) {
                phydev->interrupts = PHY_INTERRUPT_ENABLED;
                if (phydev->drv->config_intr)
                        phydev->drv->config_intr(phydev);
        }

        return 0;
}

static int ksz8061_resume(struct phy_device *phydev)
{
        int ret;

        /* This function can be called twice when the Ethernet device is on. */
        ret = phy_read(phydev, MII_BMCR);
        if (ret < 0)
                return ret;
        if (!(ret & BMCR_PDOWN))
                return 0;

        ret = kszphy_generic_resume(phydev);
        if (ret)
                return ret;

        usleep_range(1000, 2000);

        /* Re-program the value after chip is reset. */
        ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_DEVID1, 0xB61A);
        if (ret)
                return ret;

        /* Enable PHY Interrupts */
        if (phy_interrupt_is_valid(phydev)) {
                phydev->interrupts = PHY_INTERRUPT_ENABLED;
                if (phydev->drv->config_intr)
                        phydev->drv->config_intr(phydev);
        }

        return 0;
}

static int ksz8061_suspend(struct phy_device *phydev)
{
        return kszphy_suspend(phydev);
}

static int kszphy_probe(struct phy_device *phydev)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        const struct device_node *np = phydev->mdio.dev.of_node;
        struct kszphy_priv *priv;
        struct clk *clk;

        priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        phydev->priv = priv;

        priv->type = type;

        kszphy_parse_led_mode(phydev);

        clk = devm_clk_get_optional_enabled(&phydev->mdio.dev, "rmii-ref");
        /* NOTE: clk may be NULL if building without CONFIG_HAVE_CLK */
        if (!IS_ERR_OR_NULL(clk)) {
                unsigned long rate = clk_get_rate(clk);
                bool rmii_ref_clk_sel_25_mhz;

                if (type)
                        priv->rmii_ref_clk_sel = type->has_rmii_ref_clk_sel;
                rmii_ref_clk_sel_25_mhz = of_property_read_bool(np,
                                "micrel,rmii-reference-clock-select-25-mhz");

                if (rate > 24500000 && rate < 25500000) {
                        priv->rmii_ref_clk_sel_val = rmii_ref_clk_sel_25_mhz;
                } else if (rate > 49500000 && rate < 50500000) {
                        priv->rmii_ref_clk_sel_val = !rmii_ref_clk_sel_25_mhz;
                } else {
                        phydev_err(phydev, "Clock rate out of range: %ld\n",
                                   rate);
                        return -EINVAL;
                }
        } else if (!clk) {
                /* unnamed clock from the generic ethernet-phy binding */
                clk = devm_clk_get_optional_enabled(&phydev->mdio.dev, NULL);
        }

        if (IS_ERR(clk))
                return PTR_ERR(clk);

        clk_disable_unprepare(clk);
        priv->clk = clk;

        if (ksz8041_fiber_mode(phydev))
                phydev->port = PORT_FIBRE;

        /* Support legacy board-file configuration */
        if (phydev->dev_flags & MICREL_PHY_50MHZ_CLK) {
                priv->rmii_ref_clk_sel = true;
                priv->rmii_ref_clk_sel_val = true;
        }

        return 0;
}

static int lan8814_cable_test_start(struct phy_device *phydev)
{
        /* If autoneg is enabled, we won't be able to test cross pair
         * short. In this case, the PHY will "detect" a link and
         * confuse the internal state machine - disable auto neg here.
         * Set the speed to 1000mbit and full duplex.
         */
        return phy_modify(phydev, MII_BMCR, BMCR_ANENABLE | BMCR_SPEED100,
                          BMCR_SPEED1000 | BMCR_FULLDPLX);
}

static int ksz886x_cable_test_start(struct phy_device *phydev)
{
        if (phydev->dev_flags & MICREL_KSZ8_P1_ERRATA)
                return -EOPNOTSUPP;

        /* If autoneg is enabled, we won't be able to test cross pair
         * short. In this case, the PHY will "detect" a link and
         * confuse the internal state machine - disable auto neg here.
         * If autoneg is disabled, we should set the speed to 10mbit.
         */
        return phy_clear_bits(phydev, MII_BMCR, BMCR_ANENABLE | BMCR_SPEED100);
}

static __always_inline int ksz886x_cable_test_result_trans(u16 status, u16 mask)
{
        switch (FIELD_GET(mask, status)) {
        case KSZ8081_LMD_STAT_NORMAL:
                return ETHTOOL_A_CABLE_RESULT_CODE_OK;
        case KSZ8081_LMD_STAT_SHORT:
                return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
        case KSZ8081_LMD_STAT_OPEN:
                return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
        case KSZ8081_LMD_STAT_FAIL:
                fallthrough;
        default:
                return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
        }
}

static __always_inline bool ksz886x_cable_test_failed(u16 status, u16 mask)
{
        return FIELD_GET(mask, status) ==
                KSZ8081_LMD_STAT_FAIL;
}

static __always_inline bool ksz886x_cable_test_fault_length_valid(u16 status, u16 mask)
{
        switch (FIELD_GET(mask, status)) {
        case KSZ8081_LMD_STAT_OPEN:
                fallthrough;
        case KSZ8081_LMD_STAT_SHORT:
                return true;
        }
        return false;
}

static __always_inline int ksz886x_cable_test_fault_length(struct phy_device *phydev,
                                                           u16 status, u16 data_mask)
{
        int dt;

        /* According to the data sheet the distance to the fault is
         * DELTA_TIME * 0.4 meters for ksz phys.
         * (DELTA_TIME - 22) * 0.8 for lan8814 phy.
         */
        dt = FIELD_GET(data_mask, status);

        if (phydev_id_compare(phydev, PHY_ID_LAN8814))
                return ((dt - 22) * 800) / 10;
        else
                return (dt * 400) / 10;
}

static int ksz886x_cable_test_wait_for_completion(struct phy_device *phydev)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        int val, ret;

        ret = phy_read_poll_timeout(phydev, type->cable_diag_reg, val,
                                    !(val & KSZ8081_LMD_ENABLE_TEST),
                                    30000, 100000, true);

        return ret < 0 ? ret : 0;
}

static int lan8814_cable_test_one_pair(struct phy_device *phydev, int pair)
{
        static const int ethtool_pair[] = { ETHTOOL_A_CABLE_PAIR_A,
                                            ETHTOOL_A_CABLE_PAIR_B,
                                            ETHTOOL_A_CABLE_PAIR_C,
                                            ETHTOOL_A_CABLE_PAIR_D,
                                          };
        u32 fault_length;
        int ret;
        int val;

        val = KSZ8081_LMD_ENABLE_TEST;
        val = val | (pair << LAN8814_PAIR_BIT_SHIFT);

        ret = phy_write(phydev, LAN8814_CABLE_DIAG, val);
        if (ret < 0)
                return ret;

        ret = ksz886x_cable_test_wait_for_completion(phydev);
        if (ret)
                return ret;

        val = phy_read(phydev, LAN8814_CABLE_DIAG);
        if (val < 0)
                return val;

        if (ksz886x_cable_test_failed(val, LAN8814_CABLE_DIAG_STAT_MASK))
                return -EAGAIN;

        ret = ethnl_cable_test_result(phydev, ethtool_pair[pair],
                                      ksz886x_cable_test_result_trans(val,
                                                                      LAN8814_CABLE_DIAG_STAT_MASK
                                                                      ));
        if (ret)
                return ret;

        if (!ksz886x_cable_test_fault_length_valid(val, LAN8814_CABLE_DIAG_STAT_MASK))
                return 0;

        fault_length = ksz886x_cable_test_fault_length(phydev, val,
                                                       LAN8814_CABLE_DIAG_VCT_DATA_MASK);

        return ethnl_cable_test_fault_length(phydev, ethtool_pair[pair], fault_length);
}

static int ksz886x_cable_test_one_pair(struct phy_device *phydev, int pair)
{
        static const int ethtool_pair[] = {
                ETHTOOL_A_CABLE_PAIR_A,
                ETHTOOL_A_CABLE_PAIR_B,
        };
        int ret, val, mdix;
        u32 fault_length;

        /* There is no way to choice the pair, like we do one ksz9031.
         * We can workaround this limitation by using the MDI-X functionality.
         */
        if (pair == 0)
                mdix = ETH_TP_MDI;
        else
                mdix = ETH_TP_MDI_X;

        switch (phydev->phy_id & MICREL_PHY_ID_MASK) {
        case PHY_ID_KSZ8081:
                ret = ksz8081_config_mdix(phydev, mdix);
                break;
        case PHY_ID_KSZ886X:
                ret = ksz886x_config_mdix(phydev, mdix);
                break;
        default:
                ret = -ENODEV;
        }

        if (ret)
                return ret;

        /* Now we are ready to fire. This command will send a 100ns pulse
         * to the pair.
         */
        ret = phy_write(phydev, KSZ8081_LMD, KSZ8081_LMD_ENABLE_TEST);
        if (ret)
                return ret;

        ret = ksz886x_cable_test_wait_for_completion(phydev);
        if (ret)
                return ret;

        val = phy_read(phydev, KSZ8081_LMD);
        if (val < 0)
                return val;

        if (ksz886x_cable_test_failed(val, KSZ8081_LMD_STAT_MASK))
                return -EAGAIN;

        ret = ethnl_cable_test_result(phydev, ethtool_pair[pair],
                                      ksz886x_cable_test_result_trans(val, KSZ8081_LMD_STAT_MASK));
        if (ret)
                return ret;

        if (!ksz886x_cable_test_fault_length_valid(val, KSZ8081_LMD_STAT_MASK))
                return 0;

        fault_length = ksz886x_cable_test_fault_length(phydev, val, KSZ8081_LMD_DELTA_TIME_MASK);

        return ethnl_cable_test_fault_length(phydev, ethtool_pair[pair], fault_length);
}

static int ksz886x_cable_test_get_status(struct phy_device *phydev,
                                         bool *finished)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        unsigned long pair_mask = type->pair_mask;
        int retries = 20;
        int ret = 0;
        int pair;

        *finished = false;

        /* Try harder if link partner is active */
        while (pair_mask && retries--) {
                for_each_set_bit(pair, &pair_mask, 4) {
                        if (type->cable_diag_reg == LAN8814_CABLE_DIAG)
                                ret = lan8814_cable_test_one_pair(phydev, pair);
                        else
                                ret = ksz886x_cable_test_one_pair(phydev, pair);
                        if (ret == -EAGAIN)
                                continue;
                        if (ret < 0)
                                return ret;
                        clear_bit(pair, &pair_mask);
                }
                /* If link partner is in autonegotiation mode it will send 2ms
                 * of FLPs with at least 6ms of silence.
                 * Add 2ms sleep to have better chances to hit this silence.
                 */
                if (pair_mask)
                        msleep(2);
        }

        *finished = true;

        return ret;
}

#define LAN_EXT_PAGE_ACCESS_CONTROL                     0x16
#define LAN_EXT_PAGE_ACCESS_ADDRESS_DATA                0x17
#define LAN_EXT_PAGE_ACCESS_CTRL_EP_FUNC                0x4000

#define LAN8814_QSGMII_SOFT_RESET                       0x43
#define LAN8814_QSGMII_SOFT_RESET_BIT                   BIT(0)
#define LAN8814_QSGMII_PCS1G_ANEG_CONFIG                0x13
#define LAN8814_QSGMII_PCS1G_ANEG_CONFIG_ANEG_ENA       BIT(3)
#define LAN8814_ALIGN_SWAP                              0x4a
#define LAN8814_ALIGN_TX_A_B_SWAP                       0x1
#define LAN8814_ALIGN_TX_A_B_SWAP_MASK                  GENMASK(2, 0)

#define LAN8804_ALIGN_SWAP                              0x4a
#define LAN8804_ALIGN_TX_A_B_SWAP                       0x1
#define LAN8804_ALIGN_TX_A_B_SWAP_MASK                  GENMASK(2, 0)
#define LAN8814_CLOCK_MANAGEMENT                        0xd
#define LAN8814_LINK_QUALITY                            0x8e

static int lanphy_read_page_reg(struct phy_device *phydev, int page, u32 addr)
{
        int data;

        phy_lock_mdio_bus(phydev);
        __phy_write(phydev, LAN_EXT_PAGE_ACCESS_CONTROL, page);
        __phy_write(phydev, LAN_EXT_PAGE_ACCESS_ADDRESS_DATA, addr);
        __phy_write(phydev, LAN_EXT_PAGE_ACCESS_CONTROL,
                    (page | LAN_EXT_PAGE_ACCESS_CTRL_EP_FUNC));
        data = __phy_read(phydev, LAN_EXT_PAGE_ACCESS_ADDRESS_DATA);
        phy_unlock_mdio_bus(phydev);

        return data;
}

static int lanphy_write_page_reg(struct phy_device *phydev, int page, u16 addr,
                                 u16 val)
{
        phy_lock_mdio_bus(phydev);
        __phy_write(phydev, LAN_EXT_PAGE_ACCESS_CONTROL, page);
        __phy_write(phydev, LAN_EXT_PAGE_ACCESS_ADDRESS_DATA, addr);
        __phy_write(phydev, LAN_EXT_PAGE_ACCESS_CONTROL,
                    page | LAN_EXT_PAGE_ACCESS_CTRL_EP_FUNC);

        val = __phy_write(phydev, LAN_EXT_PAGE_ACCESS_ADDRESS_DATA, val);
        if (val != 0)
                phydev_err(phydev, "Error: phy_write has returned error %d\n",
                           val);
        phy_unlock_mdio_bus(phydev);
        return val;
}

static int lan8814_config_ts_intr(struct phy_device *phydev, bool enable)
{
        u16 val = 0;

        if (enable)
                val = PTP_TSU_INT_EN_PTP_TX_TS_EN_ |
                      PTP_TSU_INT_EN_PTP_TX_TS_OVRFL_EN_ |
                      PTP_TSU_INT_EN_PTP_RX_TS_EN_ |
                      PTP_TSU_INT_EN_PTP_RX_TS_OVRFL_EN_;

        return lanphy_write_page_reg(phydev, 5, PTP_TSU_INT_EN, val);
}

static void lan8814_ptp_rx_ts_get(struct phy_device *phydev,
                                  u32 *seconds, u32 *nano_seconds, u16 *seq_id)
{
        *seconds = lanphy_read_page_reg(phydev, 5, PTP_RX_INGRESS_SEC_HI);
        *seconds = (*seconds << 16) |
                   lanphy_read_page_reg(phydev, 5, PTP_RX_INGRESS_SEC_LO);

        *nano_seconds = lanphy_read_page_reg(phydev, 5, PTP_RX_INGRESS_NS_HI);
        *nano_seconds = ((*nano_seconds & 0x3fff) << 16) |
                        lanphy_read_page_reg(phydev, 5, PTP_RX_INGRESS_NS_LO);

        *seq_id = lanphy_read_page_reg(phydev, 5, PTP_RX_MSG_HEADER2);
}

static void lan8814_ptp_tx_ts_get(struct phy_device *phydev,
                                  u32 *seconds, u32 *nano_seconds, u16 *seq_id)
{
        *seconds = lanphy_read_page_reg(phydev, 5, PTP_TX_EGRESS_SEC_HI);
        *seconds = *seconds << 16 |
                   lanphy_read_page_reg(phydev, 5, PTP_TX_EGRESS_SEC_LO);

        *nano_seconds = lanphy_read_page_reg(phydev, 5, PTP_TX_EGRESS_NS_HI);
        *nano_seconds = ((*nano_seconds & 0x3fff) << 16) |
                        lanphy_read_page_reg(phydev, 5, PTP_TX_EGRESS_NS_LO);

        *seq_id = lanphy_read_page_reg(phydev, 5, PTP_TX_MSG_HEADER2);
}

static int lan8814_ts_info(struct mii_timestamper *mii_ts, struct kernel_ethtool_ts_info *info)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);
        struct phy_device *phydev = ptp_priv->phydev;
        struct lan8814_shared_priv *shared = phydev->shared->priv;

        info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
                                SOF_TIMESTAMPING_RX_HARDWARE |
                                SOF_TIMESTAMPING_RAW_HARDWARE;

        info->phc_index = ptp_clock_index(shared->ptp_clock);

        info->tx_types =
                (1 << HWTSTAMP_TX_OFF) |
                (1 << HWTSTAMP_TX_ON) |
                (1 << HWTSTAMP_TX_ONESTEP_SYNC);

        info->rx_filters =
                (1 << HWTSTAMP_FILTER_NONE) |
                (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
                (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
                (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
                (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);

        return 0;
}

static void lan8814_flush_fifo(struct phy_device *phydev, bool egress)
{
        int i;

        for (i = 0; i < FIFO_SIZE; ++i)
                lanphy_read_page_reg(phydev, 5,
                                     egress ? PTP_TX_MSG_HEADER2 : PTP_RX_MSG_HEADER2);

        /* Read to clear overflow status bit */
        lanphy_read_page_reg(phydev, 5, PTP_TSU_INT_STS);
}

static int lan8814_hwtstamp(struct mii_timestamper *mii_ts,
                            struct kernel_hwtstamp_config *config,
                            struct netlink_ext_ack *extack)
{
        struct kszphy_ptp_priv *ptp_priv =
                          container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);
        struct lan8814_ptp_rx_ts *rx_ts, *tmp;
        int txcfg = 0, rxcfg = 0;
        int pkt_ts_enable;
        int tx_mod;

        ptp_priv->hwts_tx_type = config->tx_type;
        ptp_priv->rx_filter = config->rx_filter;

        switch (config->rx_filter) {
        case HWTSTAMP_FILTER_NONE:
                ptp_priv->layer = 0;
                ptp_priv->version = 0;
                break;
        case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
                ptp_priv->layer = PTP_CLASS_L4;
                ptp_priv->version = PTP_CLASS_V2;
                break;
        case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
                ptp_priv->layer = PTP_CLASS_L2;
                ptp_priv->version = PTP_CLASS_V2;
                break;
        case HWTSTAMP_FILTER_PTP_V2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
                ptp_priv->layer = PTP_CLASS_L4 | PTP_CLASS_L2;
                ptp_priv->version = PTP_CLASS_V2;
                break;
        default:
                return -ERANGE;
        }

        if (ptp_priv->layer & PTP_CLASS_L2) {
                rxcfg = PTP_RX_PARSE_CONFIG_LAYER2_EN_;
                txcfg = PTP_TX_PARSE_CONFIG_LAYER2_EN_;
        } else if (ptp_priv->layer & PTP_CLASS_L4) {
                rxcfg |= PTP_RX_PARSE_CONFIG_IPV4_EN_ | PTP_RX_PARSE_CONFIG_IPV6_EN_;
                txcfg |= PTP_TX_PARSE_CONFIG_IPV4_EN_ | PTP_TX_PARSE_CONFIG_IPV6_EN_;
        }
        lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_RX_PARSE_CONFIG, rxcfg);
        lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_PARSE_CONFIG, txcfg);

        pkt_ts_enable = PTP_TIMESTAMP_EN_SYNC_ | PTP_TIMESTAMP_EN_DREQ_ |
                        PTP_TIMESTAMP_EN_PDREQ_ | PTP_TIMESTAMP_EN_PDRES_;
        lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_RX_TIMESTAMP_EN, pkt_ts_enable);
        lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_TIMESTAMP_EN, pkt_ts_enable);

        tx_mod = lanphy_read_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD);
        if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ONESTEP_SYNC) {
                lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
                                      tx_mod | PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
        } else if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ON) {
                lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
                                      tx_mod & ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
        }

        if (config->rx_filter != HWTSTAMP_FILTER_NONE)
                lan8814_config_ts_intr(ptp_priv->phydev, true);
        else
                lan8814_config_ts_intr(ptp_priv->phydev, false);

        /* In case of multiple starts and stops, these needs to be cleared */
        list_for_each_entry_safe(rx_ts, tmp, &ptp_priv->rx_ts_list, list) {
                list_del(&rx_ts->list);
                kfree(rx_ts);
        }
        skb_queue_purge(&ptp_priv->rx_queue);
        skb_queue_purge(&ptp_priv->tx_queue);

        lan8814_flush_fifo(ptp_priv->phydev, false);
        lan8814_flush_fifo(ptp_priv->phydev, true);

        return 0;
}

static void lan8814_txtstamp(struct mii_timestamper *mii_ts,
                             struct sk_buff *skb, int type)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);

        switch (ptp_priv->hwts_tx_type) {
        case HWTSTAMP_TX_ONESTEP_SYNC:
                if (ptp_msg_is_sync(skb, type)) {
                        kfree_skb(skb);
                        return;
                }
                fallthrough;
        case HWTSTAMP_TX_ON:
                skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
                skb_queue_tail(&ptp_priv->tx_queue, skb);
                break;
        case HWTSTAMP_TX_OFF:
        default:
                kfree_skb(skb);
                break;
        }
}

static bool lan8814_get_sig_rx(struct sk_buff *skb, u16 *sig)
{
        struct ptp_header *ptp_header;
        u32 type;

        skb_push(skb, ETH_HLEN);
        type = ptp_classify_raw(skb);
        ptp_header = ptp_parse_header(skb, type);
        skb_pull_inline(skb, ETH_HLEN);

        if (!ptp_header)
                return false;

        *sig = (__force u16)(ntohs(ptp_header->sequence_id));
        return true;
}

static bool lan8814_match_rx_skb(struct kszphy_ptp_priv *ptp_priv,
                                 struct sk_buff *skb)
{
        struct skb_shared_hwtstamps *shhwtstamps;
        struct lan8814_ptp_rx_ts *rx_ts, *tmp;
        unsigned long flags;
        bool ret = false;
        u16 skb_sig;

        if (!lan8814_get_sig_rx(skb, &skb_sig))
                return ret;

        /* Iterate over all RX timestamps and match it with the received skbs */
        spin_lock_irqsave(&ptp_priv->rx_ts_lock, flags);
        list_for_each_entry_safe(rx_ts, tmp, &ptp_priv->rx_ts_list, list) {
                /* Check if we found the signature we were looking for. */
                if (memcmp(&skb_sig, &rx_ts->seq_id, sizeof(rx_ts->seq_id)))
                        continue;

                shhwtstamps = skb_hwtstamps(skb);
                memset(shhwtstamps, 0, sizeof(*shhwtstamps));
                shhwtstamps->hwtstamp = ktime_set(rx_ts->seconds,
                                                  rx_ts->nsec);
                list_del(&rx_ts->list);
                kfree(rx_ts);

                ret = true;
                break;
        }
        spin_unlock_irqrestore(&ptp_priv->rx_ts_lock, flags);

        if (ret)
                netif_rx(skb);
        return ret;
}

static bool lan8814_rxtstamp(struct mii_timestamper *mii_ts, struct sk_buff *skb, int type)
{
        struct kszphy_ptp_priv *ptp_priv =
                        container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);

        if (ptp_priv->rx_filter == HWTSTAMP_FILTER_NONE ||
            type == PTP_CLASS_NONE)
                return false;

        if ((type & ptp_priv->version) == 0 || (type & ptp_priv->layer) == 0)
                return false;

        /* If we failed to match then add it to the queue for when the timestamp
         * will come
         */
        if (!lan8814_match_rx_skb(ptp_priv, skb))
                skb_queue_tail(&ptp_priv->rx_queue, skb);

        return true;
}

static void lan8814_ptp_clock_set(struct phy_device *phydev,
                                  time64_t sec, u32 nsec)
{
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_SET_SEC_LO, lower_16_bits(sec));
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_SET_SEC_MID, upper_16_bits(sec));
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_SET_SEC_HI, upper_32_bits(sec));
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_SET_NS_LO, lower_16_bits(nsec));
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_SET_NS_HI, upper_16_bits(nsec));

        lanphy_write_page_reg(phydev, 4, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
}

static void lan8814_ptp_clock_get(struct phy_device *phydev,
                                  time64_t *sec, u32 *nsec)
{
        lanphy_write_page_reg(phydev, 4, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);

        *sec = lanphy_read_page_reg(phydev, 4, PTP_CLOCK_READ_SEC_HI);
        *sec <<= 16;
        *sec |= lanphy_read_page_reg(phydev, 4, PTP_CLOCK_READ_SEC_MID);
        *sec <<= 16;
        *sec |= lanphy_read_page_reg(phydev, 4, PTP_CLOCK_READ_SEC_LO);

        *nsec = lanphy_read_page_reg(phydev, 4, PTP_CLOCK_READ_NS_HI);
        *nsec <<= 16;
        *nsec |= lanphy_read_page_reg(phydev, 4, PTP_CLOCK_READ_NS_LO);
}

static int lan8814_ptpci_gettime64(struct ptp_clock_info *ptpci,
                                   struct timespec64 *ts)
{
        struct lan8814_shared_priv *shared = container_of(ptpci, struct lan8814_shared_priv,
                                                          ptp_clock_info);
        struct phy_device *phydev = shared->phydev;
        u32 nano_seconds;
        time64_t seconds;

        mutex_lock(&shared->shared_lock);
        lan8814_ptp_clock_get(phydev, &seconds, &nano_seconds);
        mutex_unlock(&shared->shared_lock);
        ts->tv_sec = seconds;
        ts->tv_nsec = nano_seconds;

        return 0;
}

static int lan8814_ptpci_settime64(struct ptp_clock_info *ptpci,
                                   const struct timespec64 *ts)
{
        struct lan8814_shared_priv *shared = container_of(ptpci, struct lan8814_shared_priv,
                                                          ptp_clock_info);
        struct phy_device *phydev = shared->phydev;

        mutex_lock(&shared->shared_lock);
        lan8814_ptp_clock_set(phydev, ts->tv_sec, ts->tv_nsec);
        mutex_unlock(&shared->shared_lock);

        return 0;
}

static void lan8814_ptp_set_target(struct phy_device *phydev, int event,
                                   s64 start_sec, u32 start_nsec)
{
        /* Set the start time */
        lanphy_write_page_reg(phydev, 4, LAN8814_PTP_CLOCK_TARGET_SEC_LO(event),
                              lower_16_bits(start_sec));
        lanphy_write_page_reg(phydev, 4, LAN8814_PTP_CLOCK_TARGET_SEC_HI(event),
                              upper_16_bits(start_sec));

        lanphy_write_page_reg(phydev, 4, LAN8814_PTP_CLOCK_TARGET_NS_LO(event),
                              lower_16_bits(start_nsec));
        lanphy_write_page_reg(phydev, 4, LAN8814_PTP_CLOCK_TARGET_NS_HI(event),
                              upper_16_bits(start_nsec) & 0x3fff);
}

static void lan8814_ptp_update_target(struct phy_device *phydev, time64_t sec)
{
        lan8814_ptp_set_target(phydev, LAN8814_EVENT_A,
                               sec + LAN8814_BUFFER_TIME, 0);
        lan8814_ptp_set_target(phydev, LAN8814_EVENT_B,
                               sec + LAN8814_BUFFER_TIME, 0);
}

static void lan8814_ptp_clock_step(struct phy_device *phydev,
                                   s64 time_step_ns)
{
        u32 nano_seconds_step;
        u64 abs_time_step_ns;
        time64_t set_seconds;
        u32 nano_seconds;
        u32 remainder;
        s32 seconds;

        if (time_step_ns >  15000000000LL) {
                /* convert to clock set */
                lan8814_ptp_clock_get(phydev, &set_seconds, &nano_seconds);
                set_seconds += div_u64_rem(time_step_ns, 1000000000LL,
                                           &remainder);
                nano_seconds += remainder;
                if (nano_seconds >= 1000000000) {
                        set_seconds++;
                        nano_seconds -= 1000000000;
                }
                lan8814_ptp_clock_set(phydev, set_seconds, nano_seconds);
                lan8814_ptp_update_target(phydev, set_seconds);
                return;
        } else if (time_step_ns < -15000000000LL) {
                /* convert to clock set */
                time_step_ns = -time_step_ns;

                lan8814_ptp_clock_get(phydev, &set_seconds, &nano_seconds);
                set_seconds -= div_u64_rem(time_step_ns, 1000000000LL,
                                           &remainder);
                nano_seconds_step = remainder;
                if (nano_seconds < nano_seconds_step) {
                        set_seconds--;
                        nano_seconds += 1000000000;
                }
                nano_seconds -= nano_seconds_step;
                lan8814_ptp_clock_set(phydev, set_seconds, nano_seconds);
                lan8814_ptp_update_target(phydev, set_seconds);
                return;
        }

        /* do clock step */
        if (time_step_ns >= 0) {
                abs_time_step_ns = (u64)time_step_ns;
                seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000,
                                           &remainder);
                nano_seconds = remainder;
        } else {
                abs_time_step_ns = (u64)(-time_step_ns);
                seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000,
                            &remainder));
                nano_seconds = remainder;
                if (nano_seconds > 0) {
                        /* subtracting nano seconds is not allowed
                         * convert to subtracting from seconds,
                         * and adding to nanoseconds
                         */
                        seconds--;
                        nano_seconds = (1000000000 - nano_seconds);
                }
        }

        if (nano_seconds > 0) {
                /* add 8 ns to cover the likely normal increment */
                nano_seconds += 8;
        }

        if (nano_seconds >= 1000000000) {
                /* carry into seconds */
                seconds++;
                nano_seconds -= 1000000000;
        }

        while (seconds) {
                u32 nsec;

                if (seconds > 0) {
                        u32 adjustment_value = (u32)seconds;
                        u16 adjustment_value_lo, adjustment_value_hi;

                        if (adjustment_value > 0xF)
                                adjustment_value = 0xF;

                        adjustment_value_lo = adjustment_value & 0xffff;
                        adjustment_value_hi = (adjustment_value >> 16) & 0x3fff;

                        lanphy_write_page_reg(phydev, 4, PTP_LTC_STEP_ADJ_LO,
                                              adjustment_value_lo);
                        lanphy_write_page_reg(phydev, 4, PTP_LTC_STEP_ADJ_HI,
                                              PTP_LTC_STEP_ADJ_DIR_ |
                                              adjustment_value_hi);
                        seconds -= ((s32)adjustment_value);

                        lan8814_ptp_clock_get(phydev, &set_seconds, &nsec);
                        set_seconds -= adjustment_value;
                        lan8814_ptp_update_target(phydev, set_seconds);
                } else {
                        u32 adjustment_value = (u32)(-seconds);
                        u16 adjustment_value_lo, adjustment_value_hi;

                        if (adjustment_value > 0xF)
                                adjustment_value = 0xF;

                        adjustment_value_lo = adjustment_value & 0xffff;
                        adjustment_value_hi = (adjustment_value >> 16) & 0x3fff;

                        lanphy_write_page_reg(phydev, 4, PTP_LTC_STEP_ADJ_LO,
                                              adjustment_value_lo);
                        lanphy_write_page_reg(phydev, 4, PTP_LTC_STEP_ADJ_HI,
                                              adjustment_value_hi);
                        seconds += ((s32)adjustment_value);

                        lan8814_ptp_clock_get(phydev, &set_seconds, &nsec);
                        set_seconds += adjustment_value;
                        lan8814_ptp_update_target(phydev, set_seconds);
                }
                lanphy_write_page_reg(phydev, 4, PTP_CMD_CTL,
                                      PTP_CMD_CTL_PTP_LTC_STEP_SEC_);
        }
        if (nano_seconds) {
                u16 nano_seconds_lo;
                u16 nano_seconds_hi;

                nano_seconds_lo = nano_seconds & 0xffff;
                nano_seconds_hi = (nano_seconds >> 16) & 0x3fff;

                lanphy_write_page_reg(phydev, 4, PTP_LTC_STEP_ADJ_LO,
                                      nano_seconds_lo);
                lanphy_write_page_reg(phydev, 4, PTP_LTC_STEP_ADJ_HI,
                                      PTP_LTC_STEP_ADJ_DIR_ |
                                      nano_seconds_hi);
                lanphy_write_page_reg(phydev, 4, PTP_CMD_CTL,
                                      PTP_CMD_CTL_PTP_LTC_STEP_NSEC_);
        }
}

static int lan8814_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
{
        struct lan8814_shared_priv *shared = container_of(ptpci, struct lan8814_shared_priv,
                                                          ptp_clock_info);
        struct phy_device *phydev = shared->phydev;

        mutex_lock(&shared->shared_lock);
        lan8814_ptp_clock_step(phydev, delta);
        mutex_unlock(&shared->shared_lock);

        return 0;
}

static int lan8814_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm)
{
        struct lan8814_shared_priv *shared = container_of(ptpci, struct lan8814_shared_priv,
                                                          ptp_clock_info);
        struct phy_device *phydev = shared->phydev;
        u16 kszphy_rate_adj_lo, kszphy_rate_adj_hi;
        bool positive = true;
        u32 kszphy_rate_adj;

        if (scaled_ppm < 0) {
                scaled_ppm = -scaled_ppm;
                positive = false;
        }

        kszphy_rate_adj = LAN8814_1PPM_FORMAT * (scaled_ppm >> 16);
        kszphy_rate_adj += (LAN8814_1PPM_FORMAT * (0xffff & scaled_ppm)) >> 16;

        kszphy_rate_adj_lo = kszphy_rate_adj & 0xffff;
        kszphy_rate_adj_hi = (kszphy_rate_adj >> 16) & 0x3fff;

        if (positive)
                kszphy_rate_adj_hi |= PTP_CLOCK_RATE_ADJ_DIR_;

        mutex_lock(&shared->shared_lock);
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_RATE_ADJ_HI, kszphy_rate_adj_hi);
        lanphy_write_page_reg(phydev, 4, PTP_CLOCK_RATE_ADJ_LO, kszphy_rate_adj_lo);
        mutex_unlock(&shared->shared_lock);

        return 0;
}

static void lan8814_ptp_set_reload(struct phy_device *phydev, int event,
                                   s64 period_sec, u32 period_nsec)
{
        lanphy_write_page_reg(phydev, 4,
                              LAN8814_PTP_CLOCK_TARGET_RELOAD_SEC_LO(event),
                              lower_16_bits(period_sec));
        lanphy_write_page_reg(phydev, 4,
                              LAN8814_PTP_CLOCK_TARGET_RELOAD_SEC_HI(event),
                              upper_16_bits(period_sec));

        lanphy_write_page_reg(phydev, 4,
                              LAN8814_PTP_CLOCK_TARGET_RELOAD_NS_LO(event),
                              lower_16_bits(period_nsec));
        lanphy_write_page_reg(phydev, 4,
                              LAN8814_PTP_CLOCK_TARGET_RELOAD_NS_HI(event),
                              upper_16_bits(period_nsec) & 0x3fff);
}

static void lan8814_ptp_enable_event(struct phy_device *phydev, int event,
                                     int pulse_width)
{
        u16 val;

        val = lanphy_read_page_reg(phydev, 4, LAN8814_PTP_GENERAL_CONFIG);
        /* Set the pulse width of the event */
        val &= ~(LAN8814_PTP_GENERAL_CONFIG_LTC_EVENT_MASK(event));
        /* Make sure that the target clock will be incremented each time when
         * local time reaches or pass it
         */
        val |= LAN8814_PTP_GENERAL_CONFIG_LTC_EVENT_SET(event, pulse_width);
        val &= ~(LAN8814_PTP_GENERAL_CONFIG_RELOAD_ADD_X(event));
        /* Set the polarity high */
        val |= LAN8814_PTP_GENERAL_CONFIG_POLARITY_X(event);
        lanphy_write_page_reg(phydev, 4, LAN8814_PTP_GENERAL_CONFIG, val);
}

static void lan8814_ptp_disable_event(struct phy_device *phydev, int event)
{
        u16 val;

        /* Set target to too far in the future, effectively disabling it */
        lan8814_ptp_set_target(phydev, event, 0xFFFFFFFF, 0);

        /* And then reload once it recheas the target */
        val = lanphy_read_page_reg(phydev, 4, LAN8814_PTP_GENERAL_CONFIG);
        val |= LAN8814_PTP_GENERAL_CONFIG_RELOAD_ADD_X(event);
        lanphy_write_page_reg(phydev, 4, LAN8814_PTP_GENERAL_CONFIG, val);
}

static void lan8814_ptp_perout_off(struct phy_device *phydev, int pin)
{
        u16 val;

        /* Disable gpio alternate function,
         * 1: select as gpio,
         * 0: select alt func
         */
        val = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_EN_ADDR(pin));
        val |= LAN8814_GPIO_EN_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_EN_ADDR(pin), val);

        val = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin));
        val &= ~LAN8814_GPIO_DIR_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin), val);

        val = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_BUF_ADDR(pin));
        val &= ~LAN8814_GPIO_BUF_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_BUF_ADDR(pin), val);
}

static void lan8814_ptp_perout_on(struct phy_device *phydev, int pin)
{
        int val;

        /* Set as gpio output */
        val = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin));
        val |= LAN8814_GPIO_DIR_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin), val);

        /* Enable gpio 0:for alternate function, 1:gpio */
        val = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_EN_ADDR(pin));
        val &= ~LAN8814_GPIO_EN_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_EN_ADDR(pin), val);

        /* Set buffer type to push pull */
        val = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_BUF_ADDR(pin));
        val |= LAN8814_GPIO_BUF_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_BUF_ADDR(pin), val);
}

static int lan8814_ptp_perout(struct ptp_clock_info *ptpci,
                              struct ptp_clock_request *rq, int on)
{
        struct lan8814_shared_priv *shared = container_of(ptpci, struct lan8814_shared_priv,
                                                          ptp_clock_info);
        struct phy_device *phydev = shared->phydev;
        struct timespec64 ts_on, ts_period;
        s64 on_nsec, period_nsec;
        int pulse_width;
        int pin, event;

        /* Reject requests with unsupported flags */
        if (rq->perout.flags & ~PTP_PEROUT_DUTY_CYCLE)
                return -EOPNOTSUPP;

        mutex_lock(&shared->shared_lock);
        event = rq->perout.index;
        pin = ptp_find_pin(shared->ptp_clock, PTP_PF_PEROUT, event);
        if (pin < 0 || pin >= LAN8814_PTP_PEROUT_NUM) {
                mutex_unlock(&shared->shared_lock);
                return -EBUSY;
        }

        if (!on) {
                lan8814_ptp_perout_off(phydev, pin);
                lan8814_ptp_disable_event(phydev, event);
                mutex_unlock(&shared->shared_lock);
                return 0;
        }

        ts_on.tv_sec = rq->perout.on.sec;
        ts_on.tv_nsec = rq->perout.on.nsec;
        on_nsec = timespec64_to_ns(&ts_on);

        ts_period.tv_sec = rq->perout.period.sec;
        ts_period.tv_nsec = rq->perout.period.nsec;
        period_nsec = timespec64_to_ns(&ts_period);

        if (period_nsec < 200) {
                pr_warn_ratelimited("%s: perout period too small, minimum is 200 nsec\n",
                                    phydev_name(phydev));
                mutex_unlock(&shared->shared_lock);
                return -EOPNOTSUPP;
        }

        if (on_nsec >= period_nsec) {
                pr_warn_ratelimited("%s: pulse width must be smaller than period\n",
                                    phydev_name(phydev));
                mutex_unlock(&shared->shared_lock);
                return -EINVAL;
        }

        switch (on_nsec) {
        case 200000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_200MS;
                break;
        case 100000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100MS;
                break;
        case 50000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50MS;
                break;
        case 10000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10MS;
                break;
        case 5000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5MS;
                break;
        case 1000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1MS;
                break;
        case 500000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500US;
                break;
        case 100000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100US;
                break;
        case 50000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50US;
                break;
        case 10000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10US;
                break;
        case 5000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5US;
                break;
        case 1000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1US;
                break;
        case 500:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500NS;
                break;
        case 100:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100NS;
                break;
        default:
                pr_warn_ratelimited("%s: Use default duty cycle of 100ns\n",
                                    phydev_name(phydev));
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100NS;
                break;
        }

        /* Configure to pulse every period */
        lan8814_ptp_enable_event(phydev, event, pulse_width);
        lan8814_ptp_set_target(phydev, event, rq->perout.start.sec,
                               rq->perout.start.nsec);
        lan8814_ptp_set_reload(phydev, event, rq->perout.period.sec,
                               rq->perout.period.nsec);
        lan8814_ptp_perout_on(phydev, pin);
        mutex_unlock(&shared->shared_lock);

        return 0;
}

static void lan8814_ptp_extts_on(struct phy_device *phydev, int pin, u32 flags)
{
        u16 tmp;

        /* Set as gpio input */
        tmp = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin));
        tmp &= ~LAN8814_GPIO_DIR_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin), tmp);

        /* Map the pin to ltc pin 0 of the capture map registers */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_GPIO_CAP_MAP_LO);
        tmp |= pin;
        lanphy_write_page_reg(phydev, 4, PTP_GPIO_CAP_MAP_LO, tmp);

        /* Enable capture on the edges of the ltc pin */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_GPIO_CAP_EN);
        if (flags & PTP_RISING_EDGE)
                tmp |= PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(0);
        if (flags & PTP_FALLING_EDGE)
                tmp |= PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(0);
        lanphy_write_page_reg(phydev, 4, PTP_GPIO_CAP_EN, tmp);

        /* Enable interrupt top interrupt */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_COMMON_INT_ENA);
        tmp |= PTP_COMMON_INT_ENA_GPIO_CAP_EN;
        lanphy_write_page_reg(phydev, 4, PTP_COMMON_INT_ENA, tmp);
}

static void lan8814_ptp_extts_off(struct phy_device *phydev, int pin)
{
        u16 tmp;

        /* Set as gpio out */
        tmp = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin));
        tmp |= LAN8814_GPIO_DIR_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_DIR_ADDR(pin), tmp);

        /* Enable alternate, 0:for alternate function, 1:gpio */
        tmp = lanphy_read_page_reg(phydev, 4, LAN8814_GPIO_EN_ADDR(pin));
        tmp &= ~LAN8814_GPIO_EN_BIT(pin);
        lanphy_write_page_reg(phydev, 4, LAN8814_GPIO_EN_ADDR(pin), tmp);

        /* Clear the mapping of pin to registers 0 of the capture registers */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_GPIO_CAP_MAP_LO);
        tmp &= ~GENMASK(3, 0);
        lanphy_write_page_reg(phydev, 4, PTP_GPIO_CAP_MAP_LO, tmp);

        /* Disable capture on both of the edges */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_GPIO_CAP_EN);
        tmp &= ~PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(pin);
        tmp &= ~PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(pin);
        lanphy_write_page_reg(phydev, 4, PTP_GPIO_CAP_EN, tmp);

        /* Disable interrupt top interrupt */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_COMMON_INT_ENA);
        tmp &= ~PTP_COMMON_INT_ENA_GPIO_CAP_EN;
        lanphy_write_page_reg(phydev, 4, PTP_COMMON_INT_ENA, tmp);
}

static int lan8814_ptp_extts(struct ptp_clock_info *ptpci,
                             struct ptp_clock_request *rq, int on)
{
        struct lan8814_shared_priv *shared = container_of(ptpci, struct lan8814_shared_priv,
                                                          ptp_clock_info);
        struct phy_device *phydev = shared->phydev;
        int pin;

        if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
                                PTP_EXTTS_EDGES |
                                PTP_STRICT_FLAGS))
                return -EOPNOTSUPP;

        pin = ptp_find_pin(shared->ptp_clock, PTP_PF_EXTTS,
                           rq->extts.index);
        if (pin == -1 || pin != LAN8814_PTP_EXTTS_NUM)
                return -EINVAL;

        mutex_lock(&shared->shared_lock);
        if (on)
                lan8814_ptp_extts_on(phydev, pin, rq->extts.flags);
        else
                lan8814_ptp_extts_off(phydev, pin);

        mutex_unlock(&shared->shared_lock);

        return 0;
}

static int lan8814_ptpci_enable(struct ptp_clock_info *ptpci,
                                struct ptp_clock_request *rq, int on)
{
        switch (rq->type) {
        case PTP_CLK_REQ_PEROUT:
                return lan8814_ptp_perout(ptpci, rq, on);
        case PTP_CLK_REQ_EXTTS:
                return lan8814_ptp_extts(ptpci, rq, on);
        default:
                return -EINVAL;
        }
}

static int lan8814_ptpci_verify(struct ptp_clock_info *ptp, unsigned int pin,
                                enum ptp_pin_function func, unsigned int chan)
{
        switch (func) {
        case PTP_PF_NONE:
        case PTP_PF_PEROUT:
                /* Only pins 0 and 1 can generate perout signals. And for pin 0
                 * there is only chan 0 (event A) and for pin 1 there is only
                 * chan 1 (event B)
                 */
                if (pin >= LAN8814_PTP_PEROUT_NUM || pin != chan)
                        return -1;
                break;
        case PTP_PF_EXTTS:
                if (pin != LAN8814_PTP_EXTTS_NUM)
                        return -1;
                break;
        default:
                return -1;
        }

        return 0;
}

static bool lan8814_get_sig_tx(struct sk_buff *skb, u16 *sig)
{
        struct ptp_header *ptp_header;
        u32 type;

        type = ptp_classify_raw(skb);
        ptp_header = ptp_parse_header(skb, type);

        if (!ptp_header)
                return false;

        *sig = (__force u16)(ntohs(ptp_header->sequence_id));
        return true;
}

static void lan8814_match_tx_skb(struct kszphy_ptp_priv *ptp_priv,
                                 u32 seconds, u32 nsec, u16 seq_id)
{
        struct skb_shared_hwtstamps shhwtstamps;
        struct sk_buff *skb, *skb_tmp;
        unsigned long flags;
        bool ret = false;
        u16 skb_sig;

        spin_lock_irqsave(&ptp_priv->tx_queue.lock, flags);
        skb_queue_walk_safe(&ptp_priv->tx_queue, skb, skb_tmp) {
                if (!lan8814_get_sig_tx(skb, &skb_sig))
                        continue;

                if (memcmp(&skb_sig, &seq_id, sizeof(seq_id)))
                        continue;

                __skb_unlink(skb, &ptp_priv->tx_queue);
                ret = true;
                break;
        }
        spin_unlock_irqrestore(&ptp_priv->tx_queue.lock, flags);

        if (ret) {
                memset(&shhwtstamps, 0, sizeof(shhwtstamps));
                shhwtstamps.hwtstamp = ktime_set(seconds, nsec);
                skb_complete_tx_timestamp(skb, &shhwtstamps);
        }
}

static void lan8814_dequeue_tx_skb(struct kszphy_ptp_priv *ptp_priv)
{
        struct phy_device *phydev = ptp_priv->phydev;
        u32 seconds, nsec;
        u16 seq_id;

        lan8814_ptp_tx_ts_get(phydev, &seconds, &nsec, &seq_id);
        lan8814_match_tx_skb(ptp_priv, seconds, nsec, seq_id);
}

static void lan8814_get_tx_ts(struct kszphy_ptp_priv *ptp_priv)
{
        struct phy_device *phydev = ptp_priv->phydev;
        u32 reg;

        do {
                lan8814_dequeue_tx_skb(ptp_priv);

                /* If other timestamps are available in the FIFO,
                 * process them.
                 */
                reg = lanphy_read_page_reg(phydev, 5, PTP_CAP_INFO);
        } while (PTP_CAP_INFO_TX_TS_CNT_GET_(reg) > 0);
}

static bool lan8814_match_skb(struct kszphy_ptp_priv *ptp_priv,
                              struct lan8814_ptp_rx_ts *rx_ts)
{
        struct skb_shared_hwtstamps *shhwtstamps;
        struct sk_buff *skb, *skb_tmp;
        unsigned long flags;
        bool ret = false;
        u16 skb_sig;

        spin_lock_irqsave(&ptp_priv->rx_queue.lock, flags);
        skb_queue_walk_safe(&ptp_priv->rx_queue, skb, skb_tmp) {
                if (!lan8814_get_sig_rx(skb, &skb_sig))
                        continue;

                if (memcmp(&skb_sig, &rx_ts->seq_id, sizeof(rx_ts->seq_id)))
                        continue;

                __skb_unlink(skb, &ptp_priv->rx_queue);

                ret = true;
                break;
        }
        spin_unlock_irqrestore(&ptp_priv->rx_queue.lock, flags);

        if (ret) {
                shhwtstamps = skb_hwtstamps(skb);
                memset(shhwtstamps, 0, sizeof(*shhwtstamps));
                shhwtstamps->hwtstamp = ktime_set(rx_ts->seconds, rx_ts->nsec);
                netif_rx(skb);
        }

        return ret;
}

static void lan8814_match_rx_ts(struct kszphy_ptp_priv *ptp_priv,
                                struct lan8814_ptp_rx_ts *rx_ts)
{
        unsigned long flags;

        /* If we failed to match the skb add it to the queue for when
         * the frame will come
         */
        if (!lan8814_match_skb(ptp_priv, rx_ts)) {
                spin_lock_irqsave(&ptp_priv->rx_ts_lock, flags);
                list_add(&rx_ts->list, &ptp_priv->rx_ts_list);
                spin_unlock_irqrestore(&ptp_priv->rx_ts_lock, flags);
        } else {
                kfree(rx_ts);
        }
}

static void lan8814_get_rx_ts(struct kszphy_ptp_priv *ptp_priv)
{
        struct phy_device *phydev = ptp_priv->phydev;
        struct lan8814_ptp_rx_ts *rx_ts;
        u32 reg;

        do {
                rx_ts = kzalloc(sizeof(*rx_ts), GFP_KERNEL);
                if (!rx_ts)
                        return;

                lan8814_ptp_rx_ts_get(phydev, &rx_ts->seconds, &rx_ts->nsec,
                                      &rx_ts->seq_id);
                lan8814_match_rx_ts(ptp_priv, rx_ts);

                /* If other timestamps are available in the FIFO,
                 * process them.
                 */
                reg = lanphy_read_page_reg(phydev, 5, PTP_CAP_INFO);
        } while (PTP_CAP_INFO_RX_TS_CNT_GET_(reg) > 0);
}

static void lan8814_handle_ptp_interrupt(struct phy_device *phydev, u16 status)
{
        struct kszphy_priv *priv = phydev->priv;
        struct kszphy_ptp_priv *ptp_priv = &priv->ptp_priv;

        if (status & PTP_TSU_INT_STS_PTP_TX_TS_EN_)
                lan8814_get_tx_ts(ptp_priv);

        if (status & PTP_TSU_INT_STS_PTP_RX_TS_EN_)
                lan8814_get_rx_ts(ptp_priv);

        if (status & PTP_TSU_INT_STS_PTP_TX_TS_OVRFL_INT_) {
                lan8814_flush_fifo(phydev, true);
                skb_queue_purge(&ptp_priv->tx_queue);
        }

        if (status & PTP_TSU_INT_STS_PTP_RX_TS_OVRFL_INT_) {
                lan8814_flush_fifo(phydev, false);
                skb_queue_purge(&ptp_priv->rx_queue);
        }
}

static int lan8814_gpio_process_cap(struct lan8814_shared_priv *shared)
{
        struct phy_device *phydev = shared->phydev;
        struct ptp_clock_event ptp_event = {0};
        unsigned long nsec;
        s64 sec;
        u16 tmp;

        /* This is 0 because whatever was the input pin it was mapped it to
         * ltc gpio pin 0
         */
        tmp = lanphy_read_page_reg(phydev, 4, PTP_GPIO_SEL);
        tmp |= PTP_GPIO_SEL_GPIO_SEL(0);
        lanphy_write_page_reg(phydev, 4, PTP_GPIO_SEL, tmp);

        tmp = lanphy_read_page_reg(phydev, 4, PTP_GPIO_CAP_STS);
        if (!(tmp & PTP_GPIO_CAP_STS_PTP_GPIO_RE_STS(0)) &&
            !(tmp & PTP_GPIO_CAP_STS_PTP_GPIO_FE_STS(0)))
                return -1;

        if (tmp & BIT(0)) {
                sec = lanphy_read_page_reg(phydev, 4, PTP_GPIO_RE_LTC_SEC_HI_CAP);
                sec <<= 16;
                sec |= lanphy_read_page_reg(phydev, 4, PTP_GPIO_RE_LTC_SEC_LO_CAP);

                nsec = lanphy_read_page_reg(phydev, 4, PTP_GPIO_RE_LTC_NS_HI_CAP) & 0x3fff;
                nsec <<= 16;
                nsec |= lanphy_read_page_reg(phydev, 4, PTP_GPIO_RE_LTC_NS_LO_CAP);
        } else {
                sec = lanphy_read_page_reg(phydev, 4, PTP_GPIO_FE_LTC_SEC_HI_CAP);
                sec <<= 16;
                sec |= lanphy_read_page_reg(phydev, 4, PTP_GPIO_FE_LTC_SEC_LO_CAP);

                nsec = lanphy_read_page_reg(phydev, 4, PTP_GPIO_FE_LTC_NS_HI_CAP) & 0x3fff;
                nsec <<= 16;
                nsec |= lanphy_read_page_reg(phydev, 4, PTP_GPIO_RE_LTC_NS_LO_CAP);
        }

        ptp_event.index = 0;
        ptp_event.timestamp = ktime_set(sec, nsec);
        ptp_event.type = PTP_CLOCK_EXTTS;
        ptp_clock_event(shared->ptp_clock, &ptp_event);

        return 0;
}

static int lan8814_handle_gpio_interrupt(struct phy_device *phydev, u16 status)
{
        struct lan8814_shared_priv *shared = phydev->shared->priv;
        int ret;

        mutex_lock(&shared->shared_lock);
        ret = lan8814_gpio_process_cap(shared);
        mutex_unlock(&shared->shared_lock);

        return ret;
}

static int lan8804_config_init(struct phy_device *phydev)
{
        int val;

        /* MDI-X setting for swap A,B transmit */
        val = lanphy_read_page_reg(phydev, 2, LAN8804_ALIGN_SWAP);
        val &= ~LAN8804_ALIGN_TX_A_B_SWAP_MASK;
        val |= LAN8804_ALIGN_TX_A_B_SWAP;
        lanphy_write_page_reg(phydev, 2, LAN8804_ALIGN_SWAP, val);

        /* Make sure that the PHY will not stop generating the clock when the
         * link partner goes down
         */
        lanphy_write_page_reg(phydev, 31, LAN8814_CLOCK_MANAGEMENT, 0x27e);
        lanphy_read_page_reg(phydev, 1, LAN8814_LINK_QUALITY);

        return 0;
}

static irqreturn_t lan8804_handle_interrupt(struct phy_device *phydev)
{
        int status;

        status = phy_read(phydev, LAN8814_INTS);
        if (status < 0) {
                phy_error(phydev);
                return IRQ_NONE;
        }

        if (status > 0)
                phy_trigger_machine(phydev);

        return IRQ_HANDLED;
}

#define LAN8804_OUTPUT_CONTROL                  25
#define LAN8804_OUTPUT_CONTROL_INTR_BUFFER      BIT(14)
#define LAN8804_CONTROL                         31
#define LAN8804_CONTROL_INTR_POLARITY           BIT(14)

static int lan8804_config_intr(struct phy_device *phydev)
{
        int err;

        /* This is an internal PHY of lan966x and is not possible to change the
         * polarity on the GIC found in lan966x, therefore change the polarity
         * of the interrupt in the PHY from being active low instead of active
         * high.
         */
        phy_write(phydev, LAN8804_CONTROL, LAN8804_CONTROL_INTR_POLARITY);

        /* By default interrupt buffer is open-drain in which case the interrupt
         * can be active only low. Therefore change the interrupt buffer to be
         * push-pull to be able to change interrupt polarity
         */
        phy_write(phydev, LAN8804_OUTPUT_CONTROL,
                  LAN8804_OUTPUT_CONTROL_INTR_BUFFER);

        if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
                err = phy_read(phydev, LAN8814_INTS);
                if (err < 0)
                        return err;

                err = phy_write(phydev, LAN8814_INTC, LAN8814_INT_LINK);
                if (err)
                        return err;
        } else {
                err = phy_write(phydev, LAN8814_INTC, 0);
                if (err)
                        return err;

                err = phy_read(phydev, LAN8814_INTS);
                if (err < 0)
                        return err;
        }

        return 0;
}

static irqreturn_t lan8814_handle_interrupt(struct phy_device *phydev)
{
        int ret = IRQ_NONE;
        int irq_status;

        irq_status = phy_read(phydev, LAN8814_INTS);
        if (irq_status < 0) {
                phy_error(phydev);
                return IRQ_NONE;
        }

        if (irq_status & LAN8814_INT_LINK) {
                phy_trigger_machine(phydev);
                ret = IRQ_HANDLED;
        }

        while (true) {
                irq_status = lanphy_read_page_reg(phydev, 5, PTP_TSU_INT_STS);
                if (!irq_status)
                        break;

                lan8814_handle_ptp_interrupt(phydev, irq_status);
                ret = IRQ_HANDLED;
        }

        if (!lan8814_handle_gpio_interrupt(phydev, irq_status))
                ret = IRQ_HANDLED;

        return ret;
}

static int lan8814_ack_interrupt(struct phy_device *phydev)
{
        /* bit[12..0] int status, which is a read and clear register. */
        int rc;

        rc = phy_read(phydev, LAN8814_INTS);

        return (rc < 0) ? rc : 0;
}

static int lan8814_config_intr(struct phy_device *phydev)
{
        int err;

        lanphy_write_page_reg(phydev, 4, LAN8814_INTR_CTRL_REG,
                              LAN8814_INTR_CTRL_REG_POLARITY |
                              LAN8814_INTR_CTRL_REG_INTR_ENABLE);

        /* enable / disable interrupts */
        if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
                err = lan8814_ack_interrupt(phydev);
                if (err)
                        return err;

                err = phy_write(phydev, LAN8814_INTC, LAN8814_INT_LINK);
        } else {
                err = phy_write(phydev, LAN8814_INTC, 0);
                if (err)
                        return err;

                err = lan8814_ack_interrupt(phydev);
        }

        return err;
}

static void lan8814_ptp_init(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;
        struct kszphy_ptp_priv *ptp_priv = &priv->ptp_priv;
        u32 temp;

        if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK) ||
            !IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING))
                return;

        lanphy_write_page_reg(phydev, 5, TSU_HARD_RESET, TSU_HARD_RESET_);

        temp = lanphy_read_page_reg(phydev, 5, PTP_TX_MOD);
        temp |= PTP_TX_MOD_BAD_UDPV4_CHKSUM_FORCE_FCS_DIS_;
        lanphy_write_page_reg(phydev, 5, PTP_TX_MOD, temp);

        temp = lanphy_read_page_reg(phydev, 5, PTP_RX_MOD);
        temp |= PTP_RX_MOD_BAD_UDPV4_CHKSUM_FORCE_FCS_DIS_;
        lanphy_write_page_reg(phydev, 5, PTP_RX_MOD, temp);

        lanphy_write_page_reg(phydev, 5, PTP_RX_PARSE_CONFIG, 0);
        lanphy_write_page_reg(phydev, 5, PTP_TX_PARSE_CONFIG, 0);

        /* Removing default registers configs related to L2 and IP */
        lanphy_write_page_reg(phydev, 5, PTP_TX_PARSE_L2_ADDR_EN, 0);
        lanphy_write_page_reg(phydev, 5, PTP_RX_PARSE_L2_ADDR_EN, 0);
        lanphy_write_page_reg(phydev, 5, PTP_TX_PARSE_IP_ADDR_EN, 0);
        lanphy_write_page_reg(phydev, 5, PTP_RX_PARSE_IP_ADDR_EN, 0);

        /* Disable checking for minorVersionPTP field */
        lanphy_write_page_reg(phydev, 5, PTP_RX_VERSION,
                              PTP_MAX_VERSION(0xff) | PTP_MIN_VERSION(0x0));
        lanphy_write_page_reg(phydev, 5, PTP_TX_VERSION,
                              PTP_MAX_VERSION(0xff) | PTP_MIN_VERSION(0x0));

        skb_queue_head_init(&ptp_priv->tx_queue);
        skb_queue_head_init(&ptp_priv->rx_queue);
        INIT_LIST_HEAD(&ptp_priv->rx_ts_list);
        spin_lock_init(&ptp_priv->rx_ts_lock);

        ptp_priv->phydev = phydev;

        ptp_priv->mii_ts.rxtstamp = lan8814_rxtstamp;
        ptp_priv->mii_ts.txtstamp = lan8814_txtstamp;
        ptp_priv->mii_ts.hwtstamp = lan8814_hwtstamp;
        ptp_priv->mii_ts.ts_info  = lan8814_ts_info;

        phydev->mii_ts = &ptp_priv->mii_ts;

        /* Timestamp selected by default to keep legacy API */
        phydev->default_timestamp = true;
}

static int lan8814_ptp_probe_once(struct phy_device *phydev)
{
        struct lan8814_shared_priv *shared = phydev->shared->priv;

        /* Initialise shared lock for clock*/
        mutex_init(&shared->shared_lock);

        shared->pin_config = devm_kmalloc_array(&phydev->mdio.dev,
                                                LAN8814_PTP_GPIO_NUM,
                                                sizeof(*shared->pin_config),
                                                GFP_KERNEL);
        if (!shared->pin_config)
                return -ENOMEM;

        for (int i = 0; i < LAN8814_PTP_GPIO_NUM; i++) {
                struct ptp_pin_desc *ptp_pin = &shared->pin_config[i];

                memset(ptp_pin, 0, sizeof(*ptp_pin));
                snprintf(ptp_pin->name,
                         sizeof(ptp_pin->name), "lan8814_ptp_pin_%02d", i);
                ptp_pin->index = i;
                ptp_pin->func =  PTP_PF_NONE;
        }

        shared->ptp_clock_info.owner = THIS_MODULE;
        snprintf(shared->ptp_clock_info.name, 30, "%s", phydev->drv->name);
        shared->ptp_clock_info.max_adj = 31249999;
        shared->ptp_clock_info.n_alarm = 0;
        shared->ptp_clock_info.n_ext_ts = LAN8814_PTP_EXTTS_NUM;
        shared->ptp_clock_info.n_pins = LAN8814_PTP_GPIO_NUM;
        shared->ptp_clock_info.pps = 0;
        shared->ptp_clock_info.pin_config = shared->pin_config;
        shared->ptp_clock_info.n_per_out = LAN8814_PTP_PEROUT_NUM;
        shared->ptp_clock_info.adjfine = lan8814_ptpci_adjfine;
        shared->ptp_clock_info.adjtime = lan8814_ptpci_adjtime;
        shared->ptp_clock_info.gettime64 = lan8814_ptpci_gettime64;
        shared->ptp_clock_info.settime64 = lan8814_ptpci_settime64;
        shared->ptp_clock_info.getcrosststamp = NULL;
        shared->ptp_clock_info.enable = lan8814_ptpci_enable;
        shared->ptp_clock_info.verify = lan8814_ptpci_verify;

        shared->ptp_clock = ptp_clock_register(&shared->ptp_clock_info,
                                               &phydev->mdio.dev);
        if (IS_ERR(shared->ptp_clock)) {
                phydev_err(phydev, "ptp_clock_register failed %lu\n",
                           PTR_ERR(shared->ptp_clock));
                return -EINVAL;
        }

        /* Check if PHC support is missing at the configuration level */
        if (!shared->ptp_clock)
                return 0;

        phydev_dbg(phydev, "successfully registered ptp clock\n");

        shared->phydev = phydev;

        /* The EP.4 is shared between all the PHYs in the package and also it
         * can be accessed by any of the PHYs
         */
        lanphy_write_page_reg(phydev, 4, LTC_HARD_RESET, LTC_HARD_RESET_);
        lanphy_write_page_reg(phydev, 4, PTP_OPERATING_MODE,
                              PTP_OPERATING_MODE_STANDALONE_);

        /* Enable ptp to run LTC clock for ptp and gpio 1PPS operation */
        lanphy_write_page_reg(phydev, 4, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);

        return 0;
}

static void lan8814_setup_led(struct phy_device *phydev, int val)
{
        int temp;

        temp = lanphy_read_page_reg(phydev, 5, LAN8814_LED_CTRL_1);

        if (val)
                temp |= LAN8814_LED_CTRL_1_KSZ9031_LED_MODE_;
        else
                temp &= ~LAN8814_LED_CTRL_1_KSZ9031_LED_MODE_;

        lanphy_write_page_reg(phydev, 5, LAN8814_LED_CTRL_1, temp);
}

static int lan8814_config_init(struct phy_device *phydev)
{
        struct kszphy_priv *lan8814 = phydev->priv;
        int val;

        /* Reset the PHY */
        val = lanphy_read_page_reg(phydev, 4, LAN8814_QSGMII_SOFT_RESET);
        val |= LAN8814_QSGMII_SOFT_RESET_BIT;
        lanphy_write_page_reg(phydev, 4, LAN8814_QSGMII_SOFT_RESET, val);

        /* Disable ANEG with QSGMII PCS Host side */
        val = lanphy_read_page_reg(phydev, 5, LAN8814_QSGMII_PCS1G_ANEG_CONFIG);
        val &= ~LAN8814_QSGMII_PCS1G_ANEG_CONFIG_ANEG_ENA;
        lanphy_write_page_reg(phydev, 5, LAN8814_QSGMII_PCS1G_ANEG_CONFIG, val);

        /* MDI-X setting for swap A,B transmit */
        val = lanphy_read_page_reg(phydev, 2, LAN8814_ALIGN_SWAP);
        val &= ~LAN8814_ALIGN_TX_A_B_SWAP_MASK;
        val |= LAN8814_ALIGN_TX_A_B_SWAP;
        lanphy_write_page_reg(phydev, 2, LAN8814_ALIGN_SWAP, val);

        if (lan8814->led_mode >= 0)
                lan8814_setup_led(phydev, lan8814->led_mode);

        return 0;
}

/* It is expected that there will not be any 'lan8814_take_coma_mode'
 * function called in suspend. Because the GPIO line can be shared, so if one of
 * the phys goes back in coma mode, then all the other PHYs will go, which is
 * wrong.
 */
static int lan8814_release_coma_mode(struct phy_device *phydev)
{
        struct gpio_desc *gpiod;

        gpiod = devm_gpiod_get_optional(&phydev->mdio.dev, "coma-mode",
                                        GPIOD_OUT_HIGH_OPEN_DRAIN |
                                        GPIOD_FLAGS_BIT_NONEXCLUSIVE);
        if (IS_ERR(gpiod))
                return PTR_ERR(gpiod);

        gpiod_set_consumer_name(gpiod, "LAN8814 coma mode");
        gpiod_set_value_cansleep(gpiod, 0);

        return 0;
}

static void lan8814_clear_2psp_bit(struct phy_device *phydev)
{
        u16 val;

        /* It was noticed that when traffic is passing through the PHY and the
         * cable is removed then the LED was still one even though there is no
         * link
         */
        val = lanphy_read_page_reg(phydev, 2, LAN8814_EEE_STATE);
        val &= ~LAN8814_EEE_STATE_MASK2P5P;
        lanphy_write_page_reg(phydev, 2, LAN8814_EEE_STATE, val);
}

static void lan8814_update_meas_time(struct phy_device *phydev)
{
        u16 val;

        /* By setting the measure time to a value of 0xb this will allow cables
         * longer than 100m to be used. This configuration can be used
         * regardless of the mode of operation of the PHY
         */
        val = lanphy_read_page_reg(phydev, 1, LAN8814_PD_CONTROLS);
        val &= ~LAN8814_PD_CONTROLS_PD_MEAS_TIME_MASK;
        val |= LAN8814_PD_CONTROLS_PD_MEAS_TIME_VAL;
        lanphy_write_page_reg(phydev, 1, LAN8814_PD_CONTROLS, val);
}

static int lan8814_probe(struct phy_device *phydev)
{
        const struct kszphy_type *type = phydev->drv->driver_data;
        struct kszphy_priv *priv;
        u16 addr;
        int err;

        priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        phydev->priv = priv;

        priv->type = type;

        kszphy_parse_led_mode(phydev);

        /* Strap-in value for PHY address, below register read gives starting
         * phy address value
         */
        addr = lanphy_read_page_reg(phydev, 4, 0) & 0x1F;
        devm_phy_package_join(&phydev->mdio.dev, phydev,
                              addr, sizeof(struct lan8814_shared_priv));

        if (phy_package_init_once(phydev)) {
                err = lan8814_release_coma_mode(phydev);
                if (err)
                        return err;

                err = lan8814_ptp_probe_once(phydev);
                if (err)
                        return err;
        }

        lan8814_ptp_init(phydev);

        /* Errata workarounds */
        lan8814_clear_2psp_bit(phydev);
        lan8814_update_meas_time(phydev);

        return 0;
}

#define LAN8841_MMD_TIMER_REG                   0
#define LAN8841_MMD0_REGISTER_17                17
#define LAN8841_MMD0_REGISTER_17_DROP_OPT(x)    ((x) & 0x3)
#define LAN8841_MMD0_REGISTER_17_XMIT_TOG_TX_DIS        BIT(3)
#define LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG   2
#define LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG_MAGJACK   BIT(14)
#define LAN8841_MMD_ANALOG_REG                  28
#define LAN8841_ANALOG_CONTROL_1                1
#define LAN8841_ANALOG_CONTROL_1_PLL_TRIM(x)    (((x) & 0x3) << 5)
#define LAN8841_ANALOG_CONTROL_10               13
#define LAN8841_ANALOG_CONTROL_10_PLL_DIV(x)    ((x) & 0x3)
#define LAN8841_ANALOG_CONTROL_11               14
#define LAN8841_ANALOG_CONTROL_11_LDO_REF(x)    (((x) & 0x7) << 12)
#define LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT 69
#define LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT_VAL 0xbffc
#define LAN8841_BTRX_POWER_DOWN                 70
#define LAN8841_BTRX_POWER_DOWN_QBIAS_CH_A      BIT(0)
#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_A       BIT(1)
#define LAN8841_BTRX_POWER_DOWN_QBIAS_CH_B      BIT(2)
#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_B       BIT(3)
#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_C       BIT(5)
#define LAN8841_BTRX_POWER_DOWN_BTRX_CH_D       BIT(7)
#define LAN8841_ADC_CHANNEL_MASK                198
#define LAN8841_PTP_RX_PARSE_L2_ADDR_EN         370
#define LAN8841_PTP_RX_PARSE_IP_ADDR_EN         371
#define LAN8841_PTP_RX_VERSION                  374
#define LAN8841_PTP_TX_PARSE_L2_ADDR_EN         434
#define LAN8841_PTP_TX_PARSE_IP_ADDR_EN         435
#define LAN8841_PTP_TX_VERSION                  438
#define LAN8841_PTP_CMD_CTL                     256
#define LAN8841_PTP_CMD_CTL_PTP_ENABLE          BIT(2)
#define LAN8841_PTP_CMD_CTL_PTP_DISABLE         BIT(1)
#define LAN8841_PTP_CMD_CTL_PTP_RESET           BIT(0)
#define LAN8841_PTP_RX_PARSE_CONFIG             368
#define LAN8841_PTP_TX_PARSE_CONFIG             432
#define LAN8841_PTP_RX_MODE                     381
#define LAN8841_PTP_INSERT_TS_EN                BIT(0)
#define LAN8841_PTP_INSERT_TS_32BIT             BIT(1)

static int lan8841_config_init(struct phy_device *phydev)
{
        int ret;

        ret = ksz9131_config_init(phydev);
        if (ret)
                return ret;

        /* Initialize the HW by resetting everything */
        phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                       LAN8841_PTP_CMD_CTL,
                       LAN8841_PTP_CMD_CTL_PTP_RESET,
                       LAN8841_PTP_CMD_CTL_PTP_RESET);

        phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                       LAN8841_PTP_CMD_CTL,
                       LAN8841_PTP_CMD_CTL_PTP_ENABLE,
                       LAN8841_PTP_CMD_CTL_PTP_ENABLE);

        /* Don't process any frames */
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_RX_PARSE_CONFIG, 0);
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_TX_PARSE_CONFIG, 0);
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_TX_PARSE_L2_ADDR_EN, 0);
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_RX_PARSE_L2_ADDR_EN, 0);
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_TX_PARSE_IP_ADDR_EN, 0);
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_RX_PARSE_IP_ADDR_EN, 0);

        /* Disable checking for minorVersionPTP field */
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_RX_VERSION, 0xff00);
        phy_write_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                      LAN8841_PTP_TX_VERSION, 0xff00);

        /* 100BT Clause 40 improvenent errata */
        phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG,
                      LAN8841_ANALOG_CONTROL_1,
                      LAN8841_ANALOG_CONTROL_1_PLL_TRIM(0x2));
        phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG,
                      LAN8841_ANALOG_CONTROL_10,
                      LAN8841_ANALOG_CONTROL_10_PLL_DIV(0x1));

        /* 10M/100M Ethernet Signal Tuning Errata for Shorted-Center Tap
         * Magnetics
         */
        ret = phy_read_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                           LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG);
        if (ret & LAN8841_OPERATION_MODE_STRAP_OVERRIDE_LOW_REG_MAGJACK) {
                phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG,
                              LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT,
                              LAN8841_TX_LOW_I_CH_C_D_POWER_MANAGMENT_VAL);
                phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG,
                              LAN8841_BTRX_POWER_DOWN,
                              LAN8841_BTRX_POWER_DOWN_QBIAS_CH_A |
                              LAN8841_BTRX_POWER_DOWN_BTRX_CH_A |
                              LAN8841_BTRX_POWER_DOWN_QBIAS_CH_B |
                              LAN8841_BTRX_POWER_DOWN_BTRX_CH_B |
                              LAN8841_BTRX_POWER_DOWN_BTRX_CH_C |
                              LAN8841_BTRX_POWER_DOWN_BTRX_CH_D);
        }

        /* LDO Adjustment errata */
        phy_write_mmd(phydev, LAN8841_MMD_ANALOG_REG,
                      LAN8841_ANALOG_CONTROL_11,
                      LAN8841_ANALOG_CONTROL_11_LDO_REF(1));

        /* 100BT RGMII latency tuning errata */
        phy_write_mmd(phydev, MDIO_MMD_PMAPMD,
                      LAN8841_ADC_CHANNEL_MASK, 0x0);
        phy_write_mmd(phydev, LAN8841_MMD_TIMER_REG,
                      LAN8841_MMD0_REGISTER_17,
                      LAN8841_MMD0_REGISTER_17_DROP_OPT(2) |
                      LAN8841_MMD0_REGISTER_17_XMIT_TOG_TX_DIS);

        return 0;
}

#define LAN8841_OUTPUT_CTRL                     25
#define LAN8841_OUTPUT_CTRL_INT_BUFFER          BIT(14)
#define LAN8841_INT_PTP                         BIT(9)

static int lan8841_config_intr(struct phy_device *phydev)
{
        int err;

        phy_modify(phydev, LAN8841_OUTPUT_CTRL,
                   LAN8841_OUTPUT_CTRL_INT_BUFFER, 0);

        if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
                err = phy_read(phydev, LAN8814_INTS);
                if (err < 0)
                        return err;

                /* Enable / disable interrupts. It is OK to enable PTP interrupt
                 * even if it PTP is not enabled. Because the underneath blocks
                 * will not enable the PTP so we will never get the PTP
                 * interrupt.
                 */
                err = phy_write(phydev, LAN8814_INTC,
                                LAN8814_INT_LINK | LAN8841_INT_PTP);
        } else {
                err = phy_write(phydev, LAN8814_INTC, 0);
                if (err)
                        return err;

                err = phy_read(phydev, LAN8814_INTS);
                if (err < 0)
                        return err;

                /* Getting a positive value doesn't mean that is an error, it
                 * just indicates what was the status. Therefore make sure to
                 * clear the value and say that there is no error.
                 */
                err = 0;
        }

        return err;
}

#define LAN8841_PTP_TX_EGRESS_SEC_LO                    453
#define LAN8841_PTP_TX_EGRESS_SEC_HI                    452
#define LAN8841_PTP_TX_EGRESS_NS_LO                     451
#define LAN8841_PTP_TX_EGRESS_NS_HI                     450
#define LAN8841_PTP_TX_EGRESS_NSEC_HI_VALID             BIT(15)
#define LAN8841_PTP_TX_MSG_HEADER2                      455

static bool lan8841_ptp_get_tx_ts(struct kszphy_ptp_priv *ptp_priv,
                                  u32 *sec, u32 *nsec, u16 *seq)
{
        struct phy_device *phydev = ptp_priv->phydev;

        *nsec = phy_read_mmd(phydev, 2, LAN8841_PTP_TX_EGRESS_NS_HI);
        if (!(*nsec & LAN8841_PTP_TX_EGRESS_NSEC_HI_VALID))
                return false;

        *nsec = ((*nsec & 0x3fff) << 16);
        *nsec = *nsec | phy_read_mmd(phydev, 2, LAN8841_PTP_TX_EGRESS_NS_LO);

        *sec = phy_read_mmd(phydev, 2, LAN8841_PTP_TX_EGRESS_SEC_HI);
        *sec = *sec << 16;
        *sec = *sec | phy_read_mmd(phydev, 2, LAN8841_PTP_TX_EGRESS_SEC_LO);

        *seq = phy_read_mmd(phydev, 2, LAN8841_PTP_TX_MSG_HEADER2);

        return true;
}

static void lan8841_ptp_process_tx_ts(struct kszphy_ptp_priv *ptp_priv)
{
        u32 sec, nsec;
        u16 seq;

        while (lan8841_ptp_get_tx_ts(ptp_priv, &sec, &nsec, &seq))
                lan8814_match_tx_skb(ptp_priv, sec, nsec, seq);
}

#define LAN8841_PTP_INT_STS                     259
#define LAN8841_PTP_INT_STS_PTP_TX_TS_OVRFL_INT BIT(13)
#define LAN8841_PTP_INT_STS_PTP_TX_TS_INT       BIT(12)
#define LAN8841_PTP_INT_STS_PTP_GPIO_CAP_INT    BIT(2)

static void lan8841_ptp_flush_fifo(struct kszphy_ptp_priv *ptp_priv)
{
        struct phy_device *phydev = ptp_priv->phydev;
        int i;

        for (i = 0; i < FIFO_SIZE; ++i)
                phy_read_mmd(phydev, 2, LAN8841_PTP_TX_MSG_HEADER2);

        phy_read_mmd(phydev, 2, LAN8841_PTP_INT_STS);
}

#define LAN8841_PTP_GPIO_CAP_STS                        506
#define LAN8841_PTP_GPIO_SEL                            327
#define LAN8841_PTP_GPIO_SEL_GPIO_SEL(gpio)             ((gpio) << 8)
#define LAN8841_PTP_GPIO_RE_LTC_SEC_HI_CAP              498
#define LAN8841_PTP_GPIO_RE_LTC_SEC_LO_CAP              499
#define LAN8841_PTP_GPIO_RE_LTC_NS_HI_CAP               500
#define LAN8841_PTP_GPIO_RE_LTC_NS_LO_CAP               501
#define LAN8841_PTP_GPIO_FE_LTC_SEC_HI_CAP              502
#define LAN8841_PTP_GPIO_FE_LTC_SEC_LO_CAP              503
#define LAN8841_PTP_GPIO_FE_LTC_NS_HI_CAP               504
#define LAN8841_PTP_GPIO_FE_LTC_NS_LO_CAP               505

static void lan8841_gpio_process_cap(struct kszphy_ptp_priv *ptp_priv)
{
        struct phy_device *phydev = ptp_priv->phydev;
        struct ptp_clock_event ptp_event = {0};
        int pin, ret, tmp;
        s32 sec, nsec;

        pin = ptp_find_pin_unlocked(ptp_priv->ptp_clock, PTP_PF_EXTTS, 0);
        if (pin == -1)
                return;

        tmp = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_CAP_STS);
        if (tmp < 0)
                return;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_GPIO_SEL,
                            LAN8841_PTP_GPIO_SEL_GPIO_SEL(pin));
        if (ret)
                return;

        mutex_lock(&ptp_priv->ptp_lock);
        if (tmp & BIT(pin)) {
                sec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_SEC_HI_CAP);
                sec <<= 16;
                sec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_SEC_LO_CAP);

                nsec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_NS_HI_CAP) & 0x3fff;
                nsec <<= 16;
                nsec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_NS_LO_CAP);
        } else {
                sec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_SEC_HI_CAP);
                sec <<= 16;
                sec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_SEC_LO_CAP);

                nsec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_NS_HI_CAP) & 0x3fff;
                nsec <<= 16;
                nsec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_NS_LO_CAP);
        }
        mutex_unlock(&ptp_priv->ptp_lock);
        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_GPIO_SEL, 0);
        if (ret)
                return;

        ptp_event.index = 0;
        ptp_event.timestamp = ktime_set(sec, nsec);
        ptp_event.type = PTP_CLOCK_EXTTS;
        ptp_clock_event(ptp_priv->ptp_clock, &ptp_event);
}

static void lan8841_handle_ptp_interrupt(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;
        struct kszphy_ptp_priv *ptp_priv = &priv->ptp_priv;
        u16 status;

        do {
                status = phy_read_mmd(phydev, 2, LAN8841_PTP_INT_STS);

                if (status & LAN8841_PTP_INT_STS_PTP_TX_TS_INT)
                        lan8841_ptp_process_tx_ts(ptp_priv);

                if (status & LAN8841_PTP_INT_STS_PTP_GPIO_CAP_INT)
                        lan8841_gpio_process_cap(ptp_priv);

                if (status & LAN8841_PTP_INT_STS_PTP_TX_TS_OVRFL_INT) {
                        lan8841_ptp_flush_fifo(ptp_priv);
                        skb_queue_purge(&ptp_priv->tx_queue);
                }

        } while (status & (LAN8841_PTP_INT_STS_PTP_TX_TS_INT |
                           LAN8841_PTP_INT_STS_PTP_GPIO_CAP_INT |
                           LAN8841_PTP_INT_STS_PTP_TX_TS_OVRFL_INT));
}

#define LAN8841_INTS_PTP                BIT(9)

static irqreturn_t lan8841_handle_interrupt(struct phy_device *phydev)
{
        irqreturn_t ret = IRQ_NONE;
        int irq_status;

        irq_status = phy_read(phydev, LAN8814_INTS);
        if (irq_status < 0) {
                phy_error(phydev);
                return IRQ_NONE;
        }

        if (irq_status & LAN8814_INT_LINK) {
                phy_trigger_machine(phydev);
                ret = IRQ_HANDLED;
        }

        if (irq_status & LAN8841_INTS_PTP) {
                lan8841_handle_ptp_interrupt(phydev);
                ret = IRQ_HANDLED;
        }

        return ret;
}

static int lan8841_ts_info(struct mii_timestamper *mii_ts,
                           struct kernel_ethtool_ts_info *info)
{
        struct kszphy_ptp_priv *ptp_priv;

        ptp_priv = container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);

        info->phc_index = ptp_priv->ptp_clock ?
                                ptp_clock_index(ptp_priv->ptp_clock) : -1;
        if (info->phc_index == -1)
                return 0;

        info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
                                SOF_TIMESTAMPING_RX_HARDWARE |
                                SOF_TIMESTAMPING_RAW_HARDWARE;

        info->tx_types = (1 << HWTSTAMP_TX_OFF) |
                         (1 << HWTSTAMP_TX_ON) |
                         (1 << HWTSTAMP_TX_ONESTEP_SYNC);

        info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
                           (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
                           (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
                           (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);

        return 0;
}

#define LAN8841_PTP_INT_EN                      260
#define LAN8841_PTP_INT_EN_PTP_TX_TS_OVRFL_EN   BIT(13)
#define LAN8841_PTP_INT_EN_PTP_TX_TS_EN         BIT(12)

static void lan8841_ptp_enable_processing(struct kszphy_ptp_priv *ptp_priv,
                                          bool enable)
{
        struct phy_device *phydev = ptp_priv->phydev;

        if (enable) {
                /* Enable interrupts on the TX side */
                phy_modify_mmd(phydev, 2, LAN8841_PTP_INT_EN,
                               LAN8841_PTP_INT_EN_PTP_TX_TS_OVRFL_EN |
                               LAN8841_PTP_INT_EN_PTP_TX_TS_EN,
                               LAN8841_PTP_INT_EN_PTP_TX_TS_OVRFL_EN |
                               LAN8841_PTP_INT_EN_PTP_TX_TS_EN);

                /* Enable the modification of the frame on RX side,
                 * this will add the ns and 2 bits of sec in the reserved field
                 * of the PTP header
                 */
                phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                               LAN8841_PTP_RX_MODE,
                               LAN8841_PTP_INSERT_TS_EN |
                               LAN8841_PTP_INSERT_TS_32BIT,
                               LAN8841_PTP_INSERT_TS_EN |
                               LAN8841_PTP_INSERT_TS_32BIT);

                ptp_schedule_worker(ptp_priv->ptp_clock, 0);
        } else {
                /* Disable interrupts on the TX side */
                phy_modify_mmd(phydev, 2, LAN8841_PTP_INT_EN,
                               LAN8841_PTP_INT_EN_PTP_TX_TS_OVRFL_EN |
                               LAN8841_PTP_INT_EN_PTP_TX_TS_EN, 0);

                /* Disable modification of the RX frames */
                phy_modify_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                               LAN8841_PTP_RX_MODE,
                               LAN8841_PTP_INSERT_TS_EN |
                               LAN8841_PTP_INSERT_TS_32BIT, 0);

                ptp_cancel_worker_sync(ptp_priv->ptp_clock);
        }
}

#define LAN8841_PTP_RX_TIMESTAMP_EN             379
#define LAN8841_PTP_TX_TIMESTAMP_EN             443
#define LAN8841_PTP_TX_MOD                      445

static int lan8841_hwtstamp(struct mii_timestamper *mii_ts,
                            struct kernel_hwtstamp_config *config,
                            struct netlink_ext_ack *extack)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);
        struct phy_device *phydev = ptp_priv->phydev;
        int txcfg = 0, rxcfg = 0;
        int pkt_ts_enable;

        ptp_priv->hwts_tx_type = config->tx_type;
        ptp_priv->rx_filter = config->rx_filter;

        switch (config->rx_filter) {
        case HWTSTAMP_FILTER_NONE:
                ptp_priv->layer = 0;
                ptp_priv->version = 0;
                break;
        case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
                ptp_priv->layer = PTP_CLASS_L4;
                ptp_priv->version = PTP_CLASS_V2;
                break;
        case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
                ptp_priv->layer = PTP_CLASS_L2;
                ptp_priv->version = PTP_CLASS_V2;
                break;
        case HWTSTAMP_FILTER_PTP_V2_EVENT:
        case HWTSTAMP_FILTER_PTP_V2_SYNC:
        case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
                ptp_priv->layer = PTP_CLASS_L4 | PTP_CLASS_L2;
                ptp_priv->version = PTP_CLASS_V2;
                break;
        default:
                return -ERANGE;
        }

        /* Setup parsing of the frames and enable the timestamping for ptp
         * frames
         */
        if (ptp_priv->layer & PTP_CLASS_L2) {
                rxcfg |= PTP_RX_PARSE_CONFIG_LAYER2_EN_;
                txcfg |= PTP_TX_PARSE_CONFIG_LAYER2_EN_;
        } else if (ptp_priv->layer & PTP_CLASS_L4) {
                rxcfg |= PTP_RX_PARSE_CONFIG_IPV4_EN_ | PTP_RX_PARSE_CONFIG_IPV6_EN_;
                txcfg |= PTP_TX_PARSE_CONFIG_IPV4_EN_ | PTP_TX_PARSE_CONFIG_IPV6_EN_;
        }

        phy_write_mmd(phydev, 2, LAN8841_PTP_RX_PARSE_CONFIG, rxcfg);
        phy_write_mmd(phydev, 2, LAN8841_PTP_TX_PARSE_CONFIG, txcfg);

        pkt_ts_enable = PTP_TIMESTAMP_EN_SYNC_ | PTP_TIMESTAMP_EN_DREQ_ |
                        PTP_TIMESTAMP_EN_PDREQ_ | PTP_TIMESTAMP_EN_PDRES_;
        phy_write_mmd(phydev, 2, LAN8841_PTP_RX_TIMESTAMP_EN, pkt_ts_enable);
        phy_write_mmd(phydev, 2, LAN8841_PTP_TX_TIMESTAMP_EN, pkt_ts_enable);

        /* Enable / disable of the TX timestamp in the SYNC frames */
        phy_modify_mmd(phydev, 2, LAN8841_PTP_TX_MOD,
                       PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_,
                       ptp_priv->hwts_tx_type == HWTSTAMP_TX_ONESTEP_SYNC ?
                                PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_ : 0);

        /* Now enable/disable the timestamping */
        lan8841_ptp_enable_processing(ptp_priv,
                                      config->rx_filter != HWTSTAMP_FILTER_NONE);

        skb_queue_purge(&ptp_priv->tx_queue);

        lan8841_ptp_flush_fifo(ptp_priv);

        return 0;
}

static bool lan8841_rxtstamp(struct mii_timestamper *mii_ts,
                             struct sk_buff *skb, int type)
{
        struct kszphy_ptp_priv *ptp_priv =
                        container_of(mii_ts, struct kszphy_ptp_priv, mii_ts);
        struct ptp_header *header = ptp_parse_header(skb, type);
        struct skb_shared_hwtstamps *shhwtstamps;
        struct timespec64 ts;
        unsigned long flags;
        u32 ts_header;

        if (!header)
                return false;

        if (ptp_priv->rx_filter == HWTSTAMP_FILTER_NONE ||
            type == PTP_CLASS_NONE)
                return false;

        if ((type & ptp_priv->version) == 0 || (type & ptp_priv->layer) == 0)
                return false;

        spin_lock_irqsave(&ptp_priv->seconds_lock, flags);
        ts.tv_sec = ptp_priv->seconds;
        spin_unlock_irqrestore(&ptp_priv->seconds_lock, flags);
        ts_header = __be32_to_cpu(header->reserved2);

        shhwtstamps = skb_hwtstamps(skb);
        memset(shhwtstamps, 0, sizeof(*shhwtstamps));

        /* Check for any wrap arounds for the second part */
        if ((ts.tv_sec & GENMASK(1, 0)) == 0 && (ts_header >> 30) == 3)
                ts.tv_sec -= GENMASK(1, 0) + 1;
        else if ((ts.tv_sec & GENMASK(1, 0)) == 3 && (ts_header >> 30) == 0)
                ts.tv_sec += 1;

        shhwtstamps->hwtstamp =
                ktime_set((ts.tv_sec & ~(GENMASK(1, 0))) | ts_header >> 30,
                          ts_header & GENMASK(29, 0));
        header->reserved2 = 0;

        netif_rx(skb);

        return true;
}

#define LAN8841_EVENT_A         0
#define LAN8841_EVENT_B         1
#define LAN8841_PTP_LTC_TARGET_SEC_HI(event)    ((event) == LAN8841_EVENT_A ? 278 : 288)
#define LAN8841_PTP_LTC_TARGET_SEC_LO(event)    ((event) == LAN8841_EVENT_A ? 279 : 289)
#define LAN8841_PTP_LTC_TARGET_NS_HI(event)     ((event) == LAN8841_EVENT_A ? 280 : 290)
#define LAN8841_PTP_LTC_TARGET_NS_LO(event)     ((event) == LAN8841_EVENT_A ? 281 : 291)

static int lan8841_ptp_set_target(struct kszphy_ptp_priv *ptp_priv, u8 event,
                                  s64 sec, u32 nsec)
{
        struct phy_device *phydev = ptp_priv->phydev;
        int ret;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_SEC_HI(event),
                            upper_16_bits(sec));
        if (ret)
                return ret;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_SEC_LO(event),
                            lower_16_bits(sec));
        if (ret)
                return ret;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_NS_HI(event) & 0x3fff,
                            upper_16_bits(nsec));
        if (ret)
                return ret;

        return phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_NS_LO(event),
                            lower_16_bits(nsec));
}

#define LAN8841_BUFFER_TIME     2

static int lan8841_ptp_update_target(struct kszphy_ptp_priv *ptp_priv,
                                     const struct timespec64 *ts)
{
        return lan8841_ptp_set_target(ptp_priv, LAN8841_EVENT_A,
                                      ts->tv_sec + LAN8841_BUFFER_TIME, 0);
}

#define LAN8841_PTP_LTC_TARGET_RELOAD_SEC_HI(event)     ((event) == LAN8841_EVENT_A ? 282 : 292)
#define LAN8841_PTP_LTC_TARGET_RELOAD_SEC_LO(event)     ((event) == LAN8841_EVENT_A ? 283 : 293)
#define LAN8841_PTP_LTC_TARGET_RELOAD_NS_HI(event)      ((event) == LAN8841_EVENT_A ? 284 : 294)
#define LAN8841_PTP_LTC_TARGET_RELOAD_NS_LO(event)      ((event) == LAN8841_EVENT_A ? 285 : 295)

static int lan8841_ptp_set_reload(struct kszphy_ptp_priv *ptp_priv, u8 event,
                                  s64 sec, u32 nsec)
{
        struct phy_device *phydev = ptp_priv->phydev;
        int ret;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_RELOAD_SEC_HI(event),
                            upper_16_bits(sec));
        if (ret)
                return ret;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_RELOAD_SEC_LO(event),
                            lower_16_bits(sec));
        if (ret)
                return ret;

        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_RELOAD_NS_HI(event) & 0x3fff,
                            upper_16_bits(nsec));
        if (ret)
                return ret;

        return phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_TARGET_RELOAD_NS_LO(event),
                             lower_16_bits(nsec));
}

#define LAN8841_PTP_LTC_SET_SEC_HI      262
#define LAN8841_PTP_LTC_SET_SEC_MID     263
#define LAN8841_PTP_LTC_SET_SEC_LO      264
#define LAN8841_PTP_LTC_SET_NS_HI       265
#define LAN8841_PTP_LTC_SET_NS_LO       266
#define LAN8841_PTP_CMD_CTL_PTP_LTC_LOAD        BIT(4)

static int lan8841_ptp_settime64(struct ptp_clock_info *ptp,
                                 const struct timespec64 *ts)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct phy_device *phydev = ptp_priv->phydev;
        unsigned long flags;
        int ret;

        /* Set the value to be stored */
        mutex_lock(&ptp_priv->ptp_lock);
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_SET_SEC_LO, lower_16_bits(ts->tv_sec));
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_SET_SEC_MID, upper_16_bits(ts->tv_sec));
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_SET_SEC_HI, upper_32_bits(ts->tv_sec) & 0xffff);
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_SET_NS_LO, lower_16_bits(ts->tv_nsec));
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_SET_NS_HI, upper_16_bits(ts->tv_nsec) & 0x3fff);

        /* Set the command to load the LTC */
        phy_write_mmd(phydev, 2, LAN8841_PTP_CMD_CTL,
                      LAN8841_PTP_CMD_CTL_PTP_LTC_LOAD);
        ret = lan8841_ptp_update_target(ptp_priv, ts);
        mutex_unlock(&ptp_priv->ptp_lock);

        spin_lock_irqsave(&ptp_priv->seconds_lock, flags);
        ptp_priv->seconds = ts->tv_sec;
        spin_unlock_irqrestore(&ptp_priv->seconds_lock, flags);

        return ret;
}

#define LAN8841_PTP_LTC_RD_SEC_HI       358
#define LAN8841_PTP_LTC_RD_SEC_MID      359
#define LAN8841_PTP_LTC_RD_SEC_LO       360
#define LAN8841_PTP_LTC_RD_NS_HI        361
#define LAN8841_PTP_LTC_RD_NS_LO        362
#define LAN8841_PTP_CMD_CTL_PTP_LTC_READ        BIT(3)

static int lan8841_ptp_gettime64(struct ptp_clock_info *ptp,
                                 struct timespec64 *ts)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct phy_device *phydev = ptp_priv->phydev;
        time64_t s;
        s64 ns;

        mutex_lock(&ptp_priv->ptp_lock);
        /* Issue the command to read the LTC */
        phy_write_mmd(phydev, 2, LAN8841_PTP_CMD_CTL,
                      LAN8841_PTP_CMD_CTL_PTP_LTC_READ);

        /* Read the LTC */
        s = phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_SEC_HI);
        s <<= 16;
        s |= phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_SEC_MID);
        s <<= 16;
        s |= phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_SEC_LO);

        ns = phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_NS_HI) & 0x3fff;
        ns <<= 16;
        ns |= phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_NS_LO);
        mutex_unlock(&ptp_priv->ptp_lock);

        set_normalized_timespec64(ts, s, ns);
        return 0;
}

static void lan8841_ptp_getseconds(struct ptp_clock_info *ptp,
                                   struct timespec64 *ts)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct phy_device *phydev = ptp_priv->phydev;
        time64_t s;

        mutex_lock(&ptp_priv->ptp_lock);
        /* Issue the command to read the LTC */
        phy_write_mmd(phydev, 2, LAN8841_PTP_CMD_CTL,
                      LAN8841_PTP_CMD_CTL_PTP_LTC_READ);

        /* Read the LTC */
        s = phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_SEC_HI);
        s <<= 16;
        s |= phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_SEC_MID);
        s <<= 16;
        s |= phy_read_mmd(phydev, 2, LAN8841_PTP_LTC_RD_SEC_LO);
        mutex_unlock(&ptp_priv->ptp_lock);

        set_normalized_timespec64(ts, s, 0);
}

#define LAN8841_PTP_LTC_STEP_ADJ_LO                     276
#define LAN8841_PTP_LTC_STEP_ADJ_HI                     275
#define LAN8841_PTP_LTC_STEP_ADJ_DIR                    BIT(15)
#define LAN8841_PTP_CMD_CTL_PTP_LTC_STEP_SECONDS        BIT(5)
#define LAN8841_PTP_CMD_CTL_PTP_LTC_STEP_NANOSECONDS    BIT(6)

static int lan8841_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct phy_device *phydev = ptp_priv->phydev;
        struct timespec64 ts;
        bool add = true;
        u32 nsec;
        s32 sec;
        int ret;

        /* The HW allows up to 15 sec to adjust the time, but here we limit to
         * 10 sec the adjustment. The reason is, in case the adjustment is 14
         * sec and 999999999 nsec, then we add 8ns to compansate the actual
         * increment so the value can be bigger than 15 sec. Therefore limit the
         * possible adjustments so we will not have these corner cases
         */
        if (delta > 10000000000LL || delta < -10000000000LL) {
                /* The timeadjustment is too big, so fall back using set time */
                u64 now;

                ptp->gettime64(ptp, &ts);

                now = ktime_to_ns(timespec64_to_ktime(ts));
                ts = ns_to_timespec64(now + delta);

                ptp->settime64(ptp, &ts);
                return 0;
        }

        sec = div_u64_rem(delta < 0 ? -delta : delta, NSEC_PER_SEC, &nsec);
        if (delta < 0 && nsec != 0) {
                /* It is not allowed to adjust low the nsec part, therefore
                 * subtract more from second part and add to nanosecond such
                 * that would roll over, so the second part will increase
                 */
                sec--;
                nsec = NSEC_PER_SEC - nsec;
        }

        /* Calculate the adjustments and the direction */
        if (delta < 0)
                add = false;

        if (nsec > 0)
                /* add 8 ns to cover the likely normal increment */
                nsec += 8;

        if (nsec >= NSEC_PER_SEC) {
                /* carry into seconds */
                sec++;
                nsec -= NSEC_PER_SEC;
        }

        mutex_lock(&ptp_priv->ptp_lock);
        if (sec) {
                phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_STEP_ADJ_LO, sec);
                phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_STEP_ADJ_HI,
                              add ? LAN8841_PTP_LTC_STEP_ADJ_DIR : 0);
                phy_write_mmd(phydev, 2, LAN8841_PTP_CMD_CTL,
                              LAN8841_PTP_CMD_CTL_PTP_LTC_STEP_SECONDS);
        }

        if (nsec) {
                phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_STEP_ADJ_LO,
                              nsec & 0xffff);
                phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_STEP_ADJ_HI,
                              (nsec >> 16) & 0x3fff);
                phy_write_mmd(phydev, 2, LAN8841_PTP_CMD_CTL,
                              LAN8841_PTP_CMD_CTL_PTP_LTC_STEP_NANOSECONDS);
        }
        mutex_unlock(&ptp_priv->ptp_lock);

        /* Update the target clock */
        ptp->gettime64(ptp, &ts);
        mutex_lock(&ptp_priv->ptp_lock);
        ret = lan8841_ptp_update_target(ptp_priv, &ts);
        mutex_unlock(&ptp_priv->ptp_lock);

        return ret;
}

#define LAN8841_PTP_LTC_RATE_ADJ_HI             269
#define LAN8841_PTP_LTC_RATE_ADJ_HI_DIR         BIT(15)
#define LAN8841_PTP_LTC_RATE_ADJ_LO             270

static int lan8841_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct phy_device *phydev = ptp_priv->phydev;
        bool faster = true;
        u32 rate;

        if (!scaled_ppm)
                return 0;

        if (scaled_ppm < 0) {
                scaled_ppm = -scaled_ppm;
                faster = false;
        }

        rate = LAN8841_1PPM_FORMAT * (upper_16_bits(scaled_ppm));
        rate += (LAN8841_1PPM_FORMAT * (lower_16_bits(scaled_ppm))) >> 16;

        mutex_lock(&ptp_priv->ptp_lock);
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_RATE_ADJ_HI,
                      faster ? LAN8841_PTP_LTC_RATE_ADJ_HI_DIR | (upper_16_bits(rate) & 0x3fff)
                             : upper_16_bits(rate) & 0x3fff);
        phy_write_mmd(phydev, 2, LAN8841_PTP_LTC_RATE_ADJ_LO, lower_16_bits(rate));
        mutex_unlock(&ptp_priv->ptp_lock);

        return 0;
}

static int lan8841_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
                              enum ptp_pin_function func, unsigned int chan)
{
        switch (func) {
        case PTP_PF_NONE:
        case PTP_PF_PEROUT:
        case PTP_PF_EXTTS:
                break;
        default:
                return -1;
        }

        return 0;
}

#define LAN8841_PTP_GPIO_NUM    10
#define LAN8841_GPIO_EN         128
#define LAN8841_GPIO_DIR        129
#define LAN8841_GPIO_BUF        130

static int lan8841_ptp_perout_off(struct kszphy_ptp_priv *ptp_priv, int pin)
{
        struct phy_device *phydev = ptp_priv->phydev;
        int ret;

        ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_EN, BIT(pin));
        if (ret)
                return ret;

        ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_DIR, BIT(pin));
        if (ret)
                return ret;

        return phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_BUF, BIT(pin));
}

static int lan8841_ptp_perout_on(struct kszphy_ptp_priv *ptp_priv, int pin)
{
        struct phy_device *phydev = ptp_priv->phydev;
        int ret;

        ret = phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_EN, BIT(pin));
        if (ret)
                return ret;

        ret = phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_DIR, BIT(pin));
        if (ret)
                return ret;

        return phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_BUF, BIT(pin));
}

#define LAN8841_GPIO_DATA_SEL1                          131
#define LAN8841_GPIO_DATA_SEL2                          132
#define LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_MASK  GENMASK(2, 0)
#define LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_A     1
#define LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_B     2
#define LAN8841_PTP_GENERAL_CONFIG                      257
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_A      BIT(1)
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_B      BIT(3)
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_A_MASK     GENMASK(7, 4)
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_B_MASK     GENMASK(11, 8)
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_A          4
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_B          7

static int lan8841_ptp_remove_event(struct kszphy_ptp_priv *ptp_priv, int pin,
                                    u8 event)
{
        struct phy_device *phydev = ptp_priv->phydev;
        u16 tmp;
        int ret;

        /* Now remove pin from the event. GPIO_DATA_SEL1 contains the GPIO
         * pins 0-4 while GPIO_DATA_SEL2 contains GPIO pins 5-9, therefore
         * depending on the pin, it requires to read a different register
         */
        if (pin < 5) {
                tmp = LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_MASK << (3 * pin);
                ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_DATA_SEL1, tmp);
        } else {
                tmp = LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_MASK << (3 * (pin - 5));
                ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_DATA_SEL2, tmp);
        }
        if (ret)
                return ret;

        /* Disable the event */
        if (event == LAN8841_EVENT_A)
                tmp = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_A |
                      LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_A_MASK;
        else
                tmp = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_B |
                      LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_B_MASK;
        return phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_EN, tmp);
}

static int lan8841_ptp_enable_event(struct kszphy_ptp_priv *ptp_priv, int pin,
                                    u8 event, int pulse_width)
{
        struct phy_device *phydev = ptp_priv->phydev;
        u16 tmp;
        int ret;

        /* Enable the event */
        if (event == LAN8841_EVENT_A)
                ret = phy_modify_mmd(phydev, 2, LAN8841_PTP_GENERAL_CONFIG,
                                     LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_A |
                                     LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_A_MASK,
                                     LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_A |
                                     pulse_width << LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_A);
        else
                ret = phy_modify_mmd(phydev, 2, LAN8841_PTP_GENERAL_CONFIG,
                                     LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_B |
                                     LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_B_MASK,
                                     LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_POL_B |
                                     pulse_width << LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_B);
        if (ret)
                return ret;

        /* Now connect the pin to the event. GPIO_DATA_SEL1 contains the GPIO
         * pins 0-4 while GPIO_DATA_SEL2 contains GPIO pins 5-9, therefore
         * depending on the pin, it requires to read a different register
         */
        if (event == LAN8841_EVENT_A)
                tmp = LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_A;
        else
                tmp = LAN8841_GPIO_DATA_SEL_GPIO_DATA_SEL_EVENT_B;

        if (pin < 5)
                ret = phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_DATA_SEL1,
                                       tmp << (3 * pin));
        else
                ret = phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_DATA_SEL2,
                                       tmp << (3 * (pin - 5)));

        return ret;
}

#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_200MS      13
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100MS      12
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50MS       11
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10MS       10
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5MS        9
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1MS        8
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500US      7
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100US      6
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50US       5
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10US       4
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5US        3
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1US        2
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500NS      1
#define LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100NS      0

static int lan8841_ptp_perout(struct ptp_clock_info *ptp,
                              struct ptp_clock_request *rq, int on)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct phy_device *phydev = ptp_priv->phydev;
        struct timespec64 ts_on, ts_period;
        s64 on_nsec, period_nsec;
        int pulse_width;
        int pin;
        int ret;

        if (rq->perout.flags & ~PTP_PEROUT_DUTY_CYCLE)
                return -EOPNOTSUPP;

        pin = ptp_find_pin(ptp_priv->ptp_clock, PTP_PF_PEROUT, rq->perout.index);
        if (pin == -1 || pin >= LAN8841_PTP_GPIO_NUM)
                return -EINVAL;

        if (!on) {
                ret = lan8841_ptp_perout_off(ptp_priv, pin);
                if (ret)
                        return ret;

                return lan8841_ptp_remove_event(ptp_priv, LAN8841_EVENT_A, pin);
        }

        ts_on.tv_sec = rq->perout.on.sec;
        ts_on.tv_nsec = rq->perout.on.nsec;
        on_nsec = timespec64_to_ns(&ts_on);

        ts_period.tv_sec = rq->perout.period.sec;
        ts_period.tv_nsec = rq->perout.period.nsec;
        period_nsec = timespec64_to_ns(&ts_period);

        if (period_nsec < 200) {
                pr_warn_ratelimited("%s: perout period too small, minimum is 200 nsec\n",
                                    phydev_name(phydev));
                return -EOPNOTSUPP;
        }

        if (on_nsec >= period_nsec) {
                pr_warn_ratelimited("%s: pulse width must be smaller than period\n",
                                    phydev_name(phydev));
                return -EINVAL;
        }

        switch (on_nsec) {
        case 200000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_200MS;
                break;
        case 100000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100MS;
                break;
        case 50000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50MS;
                break;
        case 10000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10MS;
                break;
        case 5000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5MS;
                break;
        case 1000000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1MS;
                break;
        case 500000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500US;
                break;
        case 100000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100US;
                break;
        case 50000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_50US;
                break;
        case 10000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_10US;
                break;
        case 5000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_5US;
                break;
        case 1000:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_1US;
                break;
        case 500:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_500NS;
                break;
        case 100:
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100NS;
                break;
        default:
                pr_warn_ratelimited("%s: Use default duty cycle of 100ns\n",
                                    phydev_name(phydev));
                pulse_width = LAN8841_PTP_GENERAL_CONFIG_LTC_EVENT_100NS;
                break;
        }

        mutex_lock(&ptp_priv->ptp_lock);
        ret = lan8841_ptp_set_target(ptp_priv, LAN8841_EVENT_A, rq->perout.start.sec,
                                     rq->perout.start.nsec);
        mutex_unlock(&ptp_priv->ptp_lock);
        if (ret)
                return ret;

        ret = lan8841_ptp_set_reload(ptp_priv, LAN8841_EVENT_A, rq->perout.period.sec,
                                     rq->perout.period.nsec);
        if (ret)
                return ret;

        ret = lan8841_ptp_enable_event(ptp_priv, pin, LAN8841_EVENT_A,
                                       pulse_width);
        if (ret)
                return ret;

        ret = lan8841_ptp_perout_on(ptp_priv, pin);
        if (ret)
                lan8841_ptp_remove_event(ptp_priv, pin, LAN8841_EVENT_A);

        return ret;
}

#define LAN8841_PTP_GPIO_CAP_EN                 496
#define LAN8841_PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(gpio)    (BIT(gpio))
#define LAN8841_PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(gpio)    (BIT(gpio) << 8)
#define LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN      BIT(2)

static int lan8841_ptp_extts_on(struct kszphy_ptp_priv *ptp_priv, int pin,
                                u32 flags)
{
        struct phy_device *phydev = ptp_priv->phydev;
        u16 tmp = 0;
        int ret;

        /* Set GPIO to be intput */
        ret = phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_EN, BIT(pin));
        if (ret)
                return ret;

        ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_BUF, BIT(pin));
        if (ret)
                return ret;

        /* Enable capture on the edges of the pin */
        if (flags & PTP_RISING_EDGE)
                tmp |= LAN8841_PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(pin);
        if (flags & PTP_FALLING_EDGE)
                tmp |= LAN8841_PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(pin);
        ret = phy_write_mmd(phydev, 2, LAN8841_PTP_GPIO_CAP_EN, tmp);
        if (ret)
                return ret;

        /* Enable interrupt */
        return phy_modify_mmd(phydev, 2, LAN8841_PTP_INT_EN,
                              LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN,
                              LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN);
}

static int lan8841_ptp_extts_off(struct kszphy_ptp_priv *ptp_priv, int pin)
{
        struct phy_device *phydev = ptp_priv->phydev;
        int ret;

        /* Set GPIO to be output */
        ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_EN, BIT(pin));
        if (ret)
                return ret;

        ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_BUF, BIT(pin));
        if (ret)
                return ret;

        /* Disable capture on both of the edges */
        ret = phy_modify_mmd(phydev, 2, LAN8841_PTP_GPIO_CAP_EN,
                             LAN8841_PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(pin) |
                             LAN8841_PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(pin),
                             0);
        if (ret)
                return ret;

        /* Disable interrupt */
        return phy_modify_mmd(phydev, 2, LAN8841_PTP_INT_EN,
                              LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN,
                              0);
}

static int lan8841_ptp_extts(struct ptp_clock_info *ptp,
                             struct ptp_clock_request *rq, int on)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        int pin;
        int ret;

        /* Reject requests with unsupported flags */
        if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
                                PTP_EXTTS_EDGES |
                                PTP_STRICT_FLAGS))
                return -EOPNOTSUPP;

        pin = ptp_find_pin(ptp_priv->ptp_clock, PTP_PF_EXTTS, rq->extts.index);
        if (pin == -1 || pin >= LAN8841_PTP_GPIO_NUM)
                return -EINVAL;

        mutex_lock(&ptp_priv->ptp_lock);
        if (on)
                ret = lan8841_ptp_extts_on(ptp_priv, pin, rq->extts.flags);
        else
                ret = lan8841_ptp_extts_off(ptp_priv, pin);
        mutex_unlock(&ptp_priv->ptp_lock);

        return ret;
}

static int lan8841_ptp_enable(struct ptp_clock_info *ptp,
                              struct ptp_clock_request *rq, int on)
{
        switch (rq->type) {
        case PTP_CLK_REQ_EXTTS:
                return lan8841_ptp_extts(ptp, rq, on);
        case PTP_CLK_REQ_PEROUT:
                return lan8841_ptp_perout(ptp, rq, on);
        default:
                return -EOPNOTSUPP;
        }

        return 0;
}

static long lan8841_ptp_do_aux_work(struct ptp_clock_info *ptp)
{
        struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv,
                                                        ptp_clock_info);
        struct timespec64 ts;
        unsigned long flags;

        lan8841_ptp_getseconds(&ptp_priv->ptp_clock_info, &ts);

        spin_lock_irqsave(&ptp_priv->seconds_lock, flags);
        ptp_priv->seconds = ts.tv_sec;
        spin_unlock_irqrestore(&ptp_priv->seconds_lock, flags);

        return nsecs_to_jiffies(LAN8841_GET_SEC_LTC_DELAY);
}

static struct ptp_clock_info lan8841_ptp_clock_info = {
        .owner          = THIS_MODULE,
        .name           = "lan8841 ptp",
        .max_adj        = 31249999,
        .gettime64      = lan8841_ptp_gettime64,
        .settime64      = lan8841_ptp_settime64,
        .adjtime        = lan8841_ptp_adjtime,
        .adjfine        = lan8841_ptp_adjfine,
        .verify         = lan8841_ptp_verify,
        .enable         = lan8841_ptp_enable,
        .do_aux_work    = lan8841_ptp_do_aux_work,
        .n_per_out      = LAN8841_PTP_GPIO_NUM,
        .n_ext_ts       = LAN8841_PTP_GPIO_NUM,
        .n_pins         = LAN8841_PTP_GPIO_NUM,
};

#define LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER 3
#define LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER_STRAP_RGMII_EN BIT(0)

static int lan8841_probe(struct phy_device *phydev)
{
        struct kszphy_ptp_priv *ptp_priv;
        struct kszphy_priv *priv;
        int err;

        err = kszphy_probe(phydev);
        if (err)
                return err;

        if (phy_read_mmd(phydev, KSZ9131RN_MMD_COMMON_CTRL_REG,
                         LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER) &
            LAN8841_OPERATION_MODE_STRAP_LOW_REGISTER_STRAP_RGMII_EN)
                phydev->interface = PHY_INTERFACE_MODE_RGMII_RXID;

        /* Register the clock */
        if (!IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING))
                return 0;

        priv = phydev->priv;
        ptp_priv = &priv->ptp_priv;

        ptp_priv->pin_config = devm_kcalloc(&phydev->mdio.dev,
                                            LAN8841_PTP_GPIO_NUM,
                                            sizeof(*ptp_priv->pin_config),
                                            GFP_KERNEL);
        if (!ptp_priv->pin_config)
                return -ENOMEM;

        for (int i = 0; i < LAN8841_PTP_GPIO_NUM; ++i) {
                struct ptp_pin_desc *p = &ptp_priv->pin_config[i];

                snprintf(p->name, sizeof(p->name), "pin%d", i);
                p->index = i;
                p->func = PTP_PF_NONE;
        }

        ptp_priv->ptp_clock_info = lan8841_ptp_clock_info;
        ptp_priv->ptp_clock_info.pin_config = ptp_priv->pin_config;
        ptp_priv->ptp_clock = ptp_clock_register(&ptp_priv->ptp_clock_info,
                                                 &phydev->mdio.dev);
        if (IS_ERR(ptp_priv->ptp_clock)) {
                phydev_err(phydev, "ptp_clock_register failed: %lu\n",
                           PTR_ERR(ptp_priv->ptp_clock));
                return -EINVAL;
        }

        if (!ptp_priv->ptp_clock)
                return 0;

        /* Initialize the SW */
        skb_queue_head_init(&ptp_priv->tx_queue);
        ptp_priv->phydev = phydev;
        mutex_init(&ptp_priv->ptp_lock);
        spin_lock_init(&ptp_priv->seconds_lock);

        ptp_priv->mii_ts.rxtstamp = lan8841_rxtstamp;
        ptp_priv->mii_ts.txtstamp = lan8814_txtstamp;
        ptp_priv->mii_ts.hwtstamp = lan8841_hwtstamp;
        ptp_priv->mii_ts.ts_info = lan8841_ts_info;

        phydev->mii_ts = &ptp_priv->mii_ts;

        /* Timestamp selected by default to keep legacy API */
        phydev->default_timestamp = true;

        return 0;
}

static int lan8804_resume(struct phy_device *phydev)
{
        return kszphy_resume(phydev);
}

static int lan8804_suspend(struct phy_device *phydev)
{
        return kszphy_generic_suspend(phydev);
}

static int lan8841_resume(struct phy_device *phydev)
{
        return kszphy_generic_resume(phydev);
}

static int lan8841_suspend(struct phy_device *phydev)
{
        struct kszphy_priv *priv = phydev->priv;
        struct kszphy_ptp_priv *ptp_priv = &priv->ptp_priv;

        if (ptp_priv->ptp_clock)
                ptp_cancel_worker_sync(ptp_priv->ptp_clock);

        return kszphy_generic_suspend(phydev);
}

static struct phy_driver ksphy_driver[] = {
{
        .phy_id         = PHY_ID_KS8737,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Micrel KS8737",
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ks8737_type,
        .probe          = kszphy_probe,
        .config_init    = kszphy_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ8021,
        .phy_id_mask    = 0x00ffffff,
        .name           = "Micrel KSZ8021 or KSZ8031",
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8021_type,
        .probe          = kszphy_probe,
        .config_init    = kszphy_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ8031,
        .phy_id_mask    = 0x00ffffff,
        .name           = "Micrel KSZ8031",
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8021_type,
        .probe          = kszphy_probe,
        .config_init    = kszphy_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ8041,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Micrel KSZ8041",
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8041_type,
        .probe          = kszphy_probe,
        .config_init    = ksz8041_config_init,
        .config_aneg    = ksz8041_config_aneg,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = ksz8041_suspend,
        .resume         = ksz8041_resume,
}, {
        .phy_id         = PHY_ID_KSZ8041RNLI,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Micrel KSZ8041RNLI",
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8041_type,
        .probe          = kszphy_probe,
        .config_init    = kszphy_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
}, {
        .name           = "Micrel KSZ8051",
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8051_type,
        .probe          = kszphy_probe,
        .config_init    = kszphy_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .match_phy_device = ksz8051_match_phy_device,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ8001,
        .name           = "Micrel KSZ8001 or KS8721",
        .phy_id_mask    = 0x00fffffc,
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8041_type,
        .probe          = kszphy_probe,
        .config_init    = kszphy_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ8081,
        .name           = "Micrel KSZ8081 or KSZ8091",
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .flags          = PHY_POLL_CABLE_TEST,
        /* PHY_BASIC_FEATURES */
        .driver_data    = &ksz8081_type,
        .probe          = kszphy_probe,
        .config_init    = ksz8081_config_init,
        .soft_reset     = genphy_soft_reset,
        .config_aneg    = ksz8081_config_aneg,
        .read_status    = ksz8081_read_status,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
        .cable_test_start       = ksz886x_cable_test_start,
        .cable_test_get_status  = ksz886x_cable_test_get_status,
}, {
        .phy_id         = PHY_ID_KSZ8061,
        .name           = "Micrel KSZ8061",
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        /* PHY_BASIC_FEATURES */
        .probe          = kszphy_probe,
        .config_init    = ksz8061_config_init,
        .soft_reset     = genphy_soft_reset,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .suspend        = ksz8061_suspend,
        .resume         = ksz8061_resume,
}, {
        .phy_id         = PHY_ID_KSZ9021,
        .phy_id_mask    = 0x000ffffe,
        .name           = "Micrel KSZ9021 Gigabit PHY",
        /* PHY_GBIT_FEATURES */
        .driver_data    = &ksz9021_type,
        .probe          = kszphy_probe,
        .get_features   = ksz9031_get_features,
        .config_init    = ksz9021_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
        .read_mmd       = genphy_read_mmd_unsupported,
        .write_mmd      = genphy_write_mmd_unsupported,
}, {
        .phy_id         = PHY_ID_KSZ9031,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Micrel KSZ9031 Gigabit PHY",
        .flags          = PHY_POLL_CABLE_TEST,
        .driver_data    = &ksz9021_type,
        .probe          = kszphy_probe,
        .get_features   = ksz9031_get_features,
        .config_init    = ksz9031_config_init,
        .soft_reset     = genphy_soft_reset,
        .read_status    = ksz9031_read_status,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
        .cable_test_start       = ksz9x31_cable_test_start,
        .cable_test_get_status  = ksz9x31_cable_test_get_status,
}, {
        .phy_id         = PHY_ID_LAN8814,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Microchip INDY Gigabit Quad PHY",
        .flags          = PHY_POLL_CABLE_TEST,
        .config_init    = lan8814_config_init,
        .driver_data    = &lan8814_type,
        .probe          = lan8814_probe,
        .soft_reset     = genphy_soft_reset,
        .read_status    = ksz9031_read_status,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = genphy_suspend,
        .resume         = kszphy_resume,
        .config_intr    = lan8814_config_intr,
        .handle_interrupt = lan8814_handle_interrupt,
        .cable_test_start       = lan8814_cable_test_start,
        .cable_test_get_status  = ksz886x_cable_test_get_status,
}, {
        .phy_id         = PHY_ID_LAN8804,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Microchip LAN966X Gigabit PHY",
        .config_init    = lan8804_config_init,
        .driver_data    = &ksz9021_type,
        .probe          = kszphy_probe,
        .soft_reset     = genphy_soft_reset,
        .read_status    = ksz9031_read_status,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = lan8804_suspend,
        .resume         = lan8804_resume,
        .config_intr    = lan8804_config_intr,
        .handle_interrupt = lan8804_handle_interrupt,
}, {
        .phy_id         = PHY_ID_LAN8841,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Microchip LAN8841 Gigabit PHY",
        .flags          = PHY_POLL_CABLE_TEST,
        .driver_data    = &lan8841_type,
        .config_init    = lan8841_config_init,
        .probe          = lan8841_probe,
        .soft_reset     = genphy_soft_reset,
        .config_intr    = lan8841_config_intr,
        .handle_interrupt = lan8841_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = lan8841_suspend,
        .resume         = lan8841_resume,
        .cable_test_start       = lan8814_cable_test_start,
        .cable_test_get_status  = ksz886x_cable_test_get_status,
}, {
        .phy_id         = PHY_ID_KSZ9131,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Microchip KSZ9131 Gigabit PHY",
        /* PHY_GBIT_FEATURES */
        .flags          = PHY_POLL_CABLE_TEST,
        .driver_data    = &ksz9131_type,
        .probe          = kszphy_probe,
        .soft_reset     = genphy_soft_reset,
        .config_init    = ksz9131_config_init,
        .config_intr    = kszphy_config_intr,
        .config_aneg    = ksz9131_config_aneg,
        .read_status    = ksz9131_read_status,
        .handle_interrupt = kszphy_handle_interrupt,
        .get_sset_count = kszphy_get_sset_count,
        .get_strings    = kszphy_get_strings,
        .get_stats      = kszphy_get_stats,
        .suspend        = kszphy_suspend,
        .resume         = kszphy_resume,
        .cable_test_start       = ksz9x31_cable_test_start,
        .cable_test_get_status  = ksz9x31_cable_test_get_status,
        .get_features   = ksz9477_get_features,
}, {
        .phy_id         = PHY_ID_KSZ8873MLL,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Micrel KSZ8873MLL Switch",
        /* PHY_BASIC_FEATURES */
        .config_init    = kszphy_config_init,
        .config_aneg    = ksz8873mll_config_aneg,
        .read_status    = ksz8873mll_read_status,
        .suspend        = genphy_suspend,
        .resume         = genphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ886X,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Micrel KSZ8851 Ethernet MAC or KSZ886X Switch",
        .driver_data    = &ksz886x_type,
        /* PHY_BASIC_FEATURES */
        .flags          = PHY_POLL_CABLE_TEST,
        .config_init    = kszphy_config_init,
        .config_aneg    = ksz886x_config_aneg,
        .read_status    = ksz886x_read_status,
        .suspend        = genphy_suspend,
        .resume         = genphy_resume,
        .cable_test_start       = ksz886x_cable_test_start,
        .cable_test_get_status  = ksz886x_cable_test_get_status,
}, {
        .name           = "Micrel KSZ87XX Switch",
        /* PHY_BASIC_FEATURES */
        .config_init    = kszphy_config_init,
        .match_phy_device = ksz8795_match_phy_device,
        .suspend        = genphy_suspend,
        .resume         = genphy_resume,
}, {
        .phy_id         = PHY_ID_KSZ9477,
        .phy_id_mask    = MICREL_PHY_ID_MASK,
        .name           = "Microchip KSZ9477",
        /* PHY_GBIT_FEATURES */
        .config_init    = ksz9477_config_init,
        .config_intr    = kszphy_config_intr,
        .handle_interrupt = kszphy_handle_interrupt,
        .suspend        = genphy_suspend,
        .resume         = ksz9477_resume,
        .get_features   = ksz9477_get_features,
} };

module_phy_driver(ksphy_driver);

MODULE_DESCRIPTION("Micrel PHY driver");
MODULE_AUTHOR("David J. Choi");
MODULE_LICENSE("GPL");

static const struct mdio_device_id __maybe_unused micrel_tbl[] = {
        { PHY_ID_KSZ9021, 0x000ffffe },
        { PHY_ID_KSZ9031, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ9131, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8001, 0x00fffffc },
        { PHY_ID_KS8737, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8021, 0x00ffffff },
        { PHY_ID_KSZ8031, 0x00ffffff },
        { PHY_ID_KSZ8041, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8051, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8061, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8081, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ8873MLL, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ886X, MICREL_PHY_ID_MASK },
        { PHY_ID_KSZ9477, MICREL_PHY_ID_MASK },
        { PHY_ID_LAN8814, MICREL_PHY_ID_MASK },
        { PHY_ID_LAN8804, MICREL_PHY_ID_MASK },
        { PHY_ID_LAN8841, MICREL_PHY_ID_MASK },
        { }
};

MODULE_DEVICE_TABLE(mdio, micrel_tbl);