gpio: rcar: Fix runtime PM imbalance on error

[linux/fpc-iii.git] / drivers / phy / cadence / phy-cadence-torrent.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Cadence Torrent SD0801 PHY driver.
 *
 * Copyright 2018 Cadence Design Systems, Inc.
 *
 */

#include <dt-bindings/phy/phy.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iopoll.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/reset.h>
#include <linux/regmap.h>

#define REF_CLK_19_2MHz         19200000
#define REF_CLK_25MHz           25000000

#define DEFAULT_NUM_LANES       4
#define MAX_NUM_LANES           4
#define DEFAULT_MAX_BIT_RATE    8100 /* in Mbps */

#define POLL_TIMEOUT_US         5000

#define TORRENT_COMMON_CDB_OFFSET       0x0

#define TORRENT_TX_LANE_CDB_OFFSET(ln, block_offset, reg_offset)        \
                                ((0x4000 << (block_offset)) +           \
                                (((ln) << 9) << (reg_offset)))

#define TORRENT_RX_LANE_CDB_OFFSET(ln, block_offset, reg_offset)        \
                                ((0x8000 << (block_offset)) +           \
                                (((ln) << 9) << (reg_offset)))

#define TORRENT_PHY_PCS_COMMON_OFFSET(block_offset)     \
                                (0xC000 << (block_offset))

#define TORRENT_PHY_PMA_COMMON_OFFSET(block_offset)     \
                                (0xE000 << (block_offset))

#define TORRENT_DPTX_PHY_OFFSET         0x0

/*
 * register offsets from DPTX PHY register block base (i.e MHDP
 * register base + 0x30a00)
 */
#define PHY_AUX_CTRL                    0x04
#define PHY_RESET                       0x20
#define PMA_TX_ELEC_IDLE_MASK           0xF0U
#define PMA_TX_ELEC_IDLE_SHIFT          4
#define PHY_L00_RESET_N_MASK            0x01U
#define PHY_PMA_XCVR_PLLCLK_EN          0x24
#define PHY_PMA_XCVR_PLLCLK_EN_ACK      0x28
#define PHY_PMA_XCVR_POWER_STATE_REQ    0x2c
#define PHY_POWER_STATE_LN_0    0x0000
#define PHY_POWER_STATE_LN_1    0x0008
#define PHY_POWER_STATE_LN_2    0x0010
#define PHY_POWER_STATE_LN_3    0x0018
#define PMA_XCVR_POWER_STATE_REQ_LN_MASK        0x3FU
#define PHY_PMA_XCVR_POWER_STATE_ACK    0x30
#define PHY_PMA_CMN_READY               0x34

/*
 * register offsets from SD0801 PHY register block base (i.e MHDP
 * register base + 0x500000)
 */
#define CMN_SSM_BANDGAP_TMR             0x0021U
#define CMN_SSM_BIAS_TMR                0x0022U
#define CMN_PLLSM0_PLLPRE_TMR           0x002AU
#define CMN_PLLSM0_PLLLOCK_TMR          0x002CU
#define CMN_PLLSM1_PLLPRE_TMR           0x0032U
#define CMN_PLLSM1_PLLLOCK_TMR          0x0034U
#define CMN_BGCAL_INIT_TMR              0x0064U
#define CMN_BGCAL_ITER_TMR              0x0065U
#define CMN_IBCAL_INIT_TMR              0x0074U
#define CMN_PLL0_VCOCAL_TCTRL           0x0082U
#define CMN_PLL0_VCOCAL_INIT_TMR        0x0084U
#define CMN_PLL0_VCOCAL_ITER_TMR        0x0085U
#define CMN_PLL0_VCOCAL_REFTIM_START    0x0086U
#define CMN_PLL0_VCOCAL_PLLCNT_START    0x0088U
#define CMN_PLL0_INTDIV_M0              0x0090U
#define CMN_PLL0_FRACDIVL_M0            0x0091U
#define CMN_PLL0_FRACDIVH_M0            0x0092U
#define CMN_PLL0_HIGH_THR_M0            0x0093U
#define CMN_PLL0_DSM_DIAG_M0            0x0094U
#define CMN_PLL0_SS_CTRL1_M0            0x0098U
#define CMN_PLL0_SS_CTRL2_M0            0x0099U
#define CMN_PLL0_SS_CTRL3_M0            0x009AU
#define CMN_PLL0_SS_CTRL4_M0            0x009BU
#define CMN_PLL0_LOCK_REFCNT_START      0x009CU
#define CMN_PLL0_LOCK_PLLCNT_START      0x009EU
#define CMN_PLL0_LOCK_PLLCNT_THR        0x009FU
#define CMN_PLL1_VCOCAL_TCTRL           0x00C2U
#define CMN_PLL1_VCOCAL_INIT_TMR        0x00C4U
#define CMN_PLL1_VCOCAL_ITER_TMR        0x00C5U
#define CMN_PLL1_VCOCAL_REFTIM_START    0x00C6U
#define CMN_PLL1_VCOCAL_PLLCNT_START    0x00C8U
#define CMN_PLL1_INTDIV_M0              0x00D0U
#define CMN_PLL1_FRACDIVL_M0            0x00D1U
#define CMN_PLL1_FRACDIVH_M0            0x00D2U
#define CMN_PLL1_HIGH_THR_M0            0x00D3U
#define CMN_PLL1_DSM_DIAG_M0            0x00D4U
#define CMN_PLL1_SS_CTRL1_M0            0x00D8U
#define CMN_PLL1_SS_CTRL2_M0            0x00D9U
#define CMN_PLL1_SS_CTRL3_M0            0x00DAU
#define CMN_PLL1_SS_CTRL4_M0            0x00DBU
#define CMN_PLL1_LOCK_REFCNT_START      0x00DCU
#define CMN_PLL1_LOCK_PLLCNT_START      0x00DEU
#define CMN_PLL1_LOCK_PLLCNT_THR        0x00DFU
#define CMN_TXPUCAL_INIT_TMR            0x0104U
#define CMN_TXPUCAL_ITER_TMR            0x0105U
#define CMN_TXPDCAL_INIT_TMR            0x010CU
#define CMN_TXPDCAL_ITER_TMR            0x010DU
#define CMN_RXCAL_INIT_TMR              0x0114U
#define CMN_RXCAL_ITER_TMR              0x0115U
#define CMN_SD_CAL_INIT_TMR             0x0124U
#define CMN_SD_CAL_ITER_TMR             0x0125U
#define CMN_SD_CAL_REFTIM_START         0x0126U
#define CMN_SD_CAL_PLLCNT_START         0x0128U
#define CMN_PDIAG_PLL0_CTRL_M0          0x01A0U
#define CMN_PDIAG_PLL0_CLK_SEL_M0       0x01A1U
#define CMN_PDIAG_PLL0_CP_PADJ_M0       0x01A4U
#define CMN_PDIAG_PLL0_CP_IADJ_M0       0x01A5U
#define CMN_PDIAG_PLL0_FILT_PADJ_M0     0x01A6U
#define CMN_PDIAG_PLL0_CP_PADJ_M1       0x01B4U
#define CMN_PDIAG_PLL0_CP_IADJ_M1       0x01B5U
#define CMN_PDIAG_PLL1_CTRL_M0          0x01C0U
#define CMN_PDIAG_PLL1_CLK_SEL_M0       0x01C1U
#define CMN_PDIAG_PLL1_CP_PADJ_M0       0x01C4U
#define CMN_PDIAG_PLL1_CP_IADJ_M0       0x01C5U
#define CMN_PDIAG_PLL1_FILT_PADJ_M0     0x01C6U

/* PMA TX Lane registers */
#define TX_TXCC_CTRL                    0x0040U
#define TX_TXCC_CPOST_MULT_00           0x004CU
#define TX_TXCC_MGNFS_MULT_000          0x0050U
#define DRV_DIAG_TX_DRV                 0x00C6U
#define XCVR_DIAG_PLLDRC_CTRL           0x00E5U
#define XCVR_DIAG_HSCLK_SEL             0x00E6U
#define XCVR_DIAG_HSCLK_DIV             0x00E7U
#define XCVR_DIAG_BIDI_CTRL             0x00EAU
#define TX_PSC_A0                       0x0100U
#define TX_PSC_A2                       0x0102U
#define TX_PSC_A3                       0x0103U
#define TX_RCVDET_ST_TMR                0x0123U
#define TX_DIAG_ACYA                    0x01E7U
#define TX_DIAG_ACYA_HBDC_MASK          0x0001U

/* PMA RX Lane registers */
#define RX_PSC_A0                       0x0000U
#define RX_PSC_A2                       0x0002U
#define RX_PSC_A3                       0x0003U
#define RX_PSC_CAL                      0x0006U
#define RX_REE_GCSM1_CTRL               0x0108U
#define RX_REE_GCSM2_CTRL               0x0110U
#define RX_REE_PERGCSM_CTRL             0x0118U

/* PHY PCS common registers */
#define PHY_PLL_CFG                     0x000EU

/* PHY PMA common registers */
#define PHY_PMA_CMN_CTRL2               0x0001U
#define PHY_PMA_PLL_RAW_CTRL            0x0003U

static const struct reg_field phy_pll_cfg =
                                REG_FIELD(PHY_PLL_CFG, 0, 1);

static const struct reg_field phy_pma_cmn_ctrl_2 =
                                REG_FIELD(PHY_PMA_CMN_CTRL2, 0, 7);

static const struct reg_field phy_pma_pll_raw_ctrl =
                                REG_FIELD(PHY_PMA_PLL_RAW_CTRL, 0, 1);

static const struct reg_field phy_reset_ctrl =
                                REG_FIELD(PHY_RESET, 8, 8);

static const struct of_device_id cdns_torrent_phy_of_match[];

struct cdns_torrent_inst {
        struct phy *phy;
        u32 mlane;
        u32 phy_type;
        u32 num_lanes;
        struct reset_control *lnk_rst;
};

struct cdns_torrent_phy {
        void __iomem *base;     /* DPTX registers base */
        void __iomem *sd_base; /* SD0801 registers base */
        u32 max_bit_rate; /* Maximum link bit rate to use (in Mbps) */
        struct reset_control *phy_rst;
        struct device *dev;
        struct clk *clk;
        unsigned long ref_clk_rate;
        struct cdns_torrent_inst phys[MAX_NUM_LANES];
        int nsubnodes;
        struct regmap *regmap;
        struct regmap *regmap_common_cdb;
        struct regmap *regmap_phy_pcs_common_cdb;
        struct regmap *regmap_phy_pma_common_cdb;
        struct regmap *regmap_tx_lane_cdb[MAX_NUM_LANES];
        struct regmap *regmap_rx_lane_cdb[MAX_NUM_LANES];
        struct regmap *regmap_dptx_phy_reg;
        struct regmap_field *phy_pll_cfg;
        struct regmap_field *phy_pma_cmn_ctrl_2;
        struct regmap_field *phy_pma_pll_raw_ctrl;
        struct regmap_field *phy_reset_ctrl;
};

enum phy_powerstate {
        POWERSTATE_A0 = 0,
        /* Powerstate A1 is unused */
        POWERSTATE_A2 = 2,
        POWERSTATE_A3 = 3,
};

static int cdns_torrent_dp_init(struct phy *phy);
static int cdns_torrent_dp_exit(struct phy *phy);
static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy,
                               u32 num_lanes);
static
int cdns_torrent_dp_wait_pma_cmn_ready(struct cdns_torrent_phy *cdns_phy);
static void cdns_torrent_dp_pma_cfg(struct cdns_torrent_phy *cdns_phy,
                                    struct cdns_torrent_inst *inst);
static
void cdns_torrent_dp_pma_cmn_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy);
static
void cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy,
                                             u32 rate, bool ssc);
static
void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy);
static
void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy,
                                           u32 rate, bool ssc);
static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
                                         unsigned int lane);
static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy,
                                         u32 rate, u32 num_lanes);
static int cdns_torrent_dp_configure(struct phy *phy,
                                     union phy_configure_opts *opts);
static int cdns_torrent_dp_set_power_state(struct cdns_torrent_phy *cdns_phy,
                                           u32 num_lanes,
                                           enum phy_powerstate powerstate);
static int cdns_torrent_phy_on(struct phy *phy);
static int cdns_torrent_phy_off(struct phy *phy);

static const struct phy_ops cdns_torrent_phy_ops = {
        .init           = cdns_torrent_dp_init,
        .exit           = cdns_torrent_dp_exit,
        .configure      = cdns_torrent_dp_configure,
        .power_on       = cdns_torrent_phy_on,
        .power_off      = cdns_torrent_phy_off,
        .owner          = THIS_MODULE,
};

struct cdns_torrent_data {
                u8 block_offset_shift;
                u8 reg_offset_shift;
};

struct cdns_regmap_cdb_context {
        struct device *dev;
        void __iomem *base;
        u8 reg_offset_shift;
};

static int cdns_regmap_write(void *context, unsigned int reg, unsigned int val)
{
        struct cdns_regmap_cdb_context *ctx = context;
        u32 offset = reg << ctx->reg_offset_shift;

        writew(val, ctx->base + offset);

        return 0;
}

static int cdns_regmap_read(void *context, unsigned int reg, unsigned int *val)
{
        struct cdns_regmap_cdb_context *ctx = context;
        u32 offset = reg << ctx->reg_offset_shift;

        *val = readw(ctx->base + offset);
        return 0;
}

static int cdns_regmap_dptx_write(void *context, unsigned int reg,
                                  unsigned int val)
{
        struct cdns_regmap_cdb_context *ctx = context;
        u32 offset = reg;

        writel(val, ctx->base + offset);

        return 0;
}

static int cdns_regmap_dptx_read(void *context, unsigned int reg,
                                 unsigned int *val)
{
        struct cdns_regmap_cdb_context *ctx = context;
        u32 offset = reg;

        *val = readl(ctx->base + offset);
        return 0;
}

#define TORRENT_TX_LANE_CDB_REGMAP_CONF(n) \
{ \
        .name = "torrent_tx_lane" n "_cdb", \
        .reg_stride = 1, \
        .fast_io = true, \
        .reg_write = cdns_regmap_write, \
        .reg_read = cdns_regmap_read, \
}

#define TORRENT_RX_LANE_CDB_REGMAP_CONF(n) \
{ \
        .name = "torrent_rx_lane" n "_cdb", \
        .reg_stride = 1, \
        .fast_io = true, \
        .reg_write = cdns_regmap_write, \
        .reg_read = cdns_regmap_read, \
}

static struct regmap_config cdns_torrent_tx_lane_cdb_config[] = {
        TORRENT_TX_LANE_CDB_REGMAP_CONF("0"),
        TORRENT_TX_LANE_CDB_REGMAP_CONF("1"),
        TORRENT_TX_LANE_CDB_REGMAP_CONF("2"),
        TORRENT_TX_LANE_CDB_REGMAP_CONF("3"),
};

static struct regmap_config cdns_torrent_rx_lane_cdb_config[] = {
        TORRENT_RX_LANE_CDB_REGMAP_CONF("0"),
        TORRENT_RX_LANE_CDB_REGMAP_CONF("1"),
        TORRENT_RX_LANE_CDB_REGMAP_CONF("2"),
        TORRENT_RX_LANE_CDB_REGMAP_CONF("3"),
};

static struct regmap_config cdns_torrent_common_cdb_config = {
        .name = "torrent_common_cdb",
        .reg_stride = 1,
        .fast_io = true,
        .reg_write = cdns_regmap_write,
        .reg_read = cdns_regmap_read,
};

static struct regmap_config cdns_torrent_phy_pcs_cmn_cdb_config = {
        .name = "torrent_phy_pcs_cmn_cdb",
        .reg_stride = 1,
        .fast_io = true,
        .reg_write = cdns_regmap_write,
        .reg_read = cdns_regmap_read,
};

static struct regmap_config cdns_torrent_phy_pma_cmn_cdb_config = {
        .name = "torrent_phy_pma_cmn_cdb",
        .reg_stride = 1,
        .fast_io = true,
        .reg_write = cdns_regmap_write,
        .reg_read = cdns_regmap_read,
};

static struct regmap_config cdns_torrent_dptx_phy_config = {
        .name = "torrent_dptx_phy",
        .reg_stride = 1,
        .fast_io = true,
        .reg_write = cdns_regmap_dptx_write,
        .reg_read = cdns_regmap_dptx_read,
};

/* PHY mmr access functions */

static void cdns_torrent_phy_write(struct regmap *regmap, u32 offset, u32 val)
{
        regmap_write(regmap, offset, val);
}

static u32 cdns_torrent_phy_read(struct regmap *regmap, u32 offset)
{
        unsigned int val;

        regmap_read(regmap, offset, &val);
        return val;
}

/* DPTX mmr access functions */

static void cdns_torrent_dp_write(struct regmap *regmap, u32 offset, u32 val)
{
        regmap_write(regmap, offset, val);
}

static u32 cdns_torrent_dp_read(struct regmap *regmap, u32 offset)
{
        u32 val;

        regmap_read(regmap, offset, &val);
        return val;
}

/*
 * Structure used to store values of PHY registers for voltage-related
 * coefficients, for particular voltage swing and pre-emphasis level. Values
 * are shared across all physical lanes.
 */
struct coefficients {
        /* Value of DRV_DIAG_TX_DRV register to use */
        u16 diag_tx_drv;
        /* Value of TX_TXCC_MGNFS_MULT_000 register to use */
        u16 mgnfs_mult;
        /* Value of TX_TXCC_CPOST_MULT_00 register to use */
        u16 cpost_mult;
};

/*
 * Array consists of values of voltage-related registers for sd0801 PHY. A value
 * of 0xFFFF is a placeholder for invalid combination, and will never be used.
 */
static const struct coefficients vltg_coeff[4][4] = {
        /* voltage swing 0, pre-emphasis 0->3 */
        {       {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x002A,
                 .cpost_mult = 0x0000},
                {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x001F,
                 .cpost_mult = 0x0014},
                {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0012,
                 .cpost_mult = 0x0020},
                {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000,
                 .cpost_mult = 0x002A}
        },

        /* voltage swing 1, pre-emphasis 0->3 */
        {       {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x001F,
                 .cpost_mult = 0x0000},
                {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0013,
                 .cpost_mult = 0x0012},
                {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000,
                 .cpost_mult = 0x001F},
                {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF,
                 .cpost_mult = 0xFFFF}
        },

        /* voltage swing 2, pre-emphasis 0->3 */
        {       {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0013,
                 .cpost_mult = 0x0000},
                {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000,
                 .cpost_mult = 0x0013},
                {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF,
                 .cpost_mult = 0xFFFF},
                {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF,
                 .cpost_mult = 0xFFFF}
        },

        /* voltage swing 3, pre-emphasis 0->3 */
        {       {.diag_tx_drv = 0x0003, .mgnfs_mult = 0x0000,
                 .cpost_mult = 0x0000},
                {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF,
                 .cpost_mult = 0xFFFF},
                {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF,
                 .cpost_mult = 0xFFFF},
                {.diag_tx_drv = 0xFFFF, .mgnfs_mult = 0xFFFF,
                 .cpost_mult = 0xFFFF}
        }
};

/*
 * Enable or disable PLL for selected lanes.
 */
static int cdns_torrent_dp_set_pll_en(struct cdns_torrent_phy *cdns_phy,
                                      struct phy_configure_opts_dp *dp,
                                      bool enable)
{
        u32 rd_val;
        u32 ret;
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;

        /*
         * Used to determine, which bits to check for or enable in
         * PHY_PMA_XCVR_PLLCLK_EN register.
         */
        u32 pll_bits;
        /* Used to enable or disable lanes. */
        u32 pll_val;

        /* Select values of registers and mask, depending on enabled lane
         * count.
         */
        switch (dp->lanes) {
        /* lane 0 */
        case (1):
                pll_bits = 0x00000001;
                break;
        /* lanes 0-1 */
        case (2):
                pll_bits = 0x00000003;
                break;
        /* lanes 0-3, all */
        default:
                pll_bits = 0x0000000F;
                break;
        }

        if (enable)
                pll_val = pll_bits;
        else
                pll_val = 0x00000000;

        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, pll_val);

        /* Wait for acknowledgment from PHY. */
        ret = regmap_read_poll_timeout(regmap,
                                       PHY_PMA_XCVR_PLLCLK_EN_ACK,
                                       rd_val,
                                       (rd_val & pll_bits) == pll_val,
                                       0, POLL_TIMEOUT_US);
        ndelay(100);
        return ret;
}

/*
 * Perform register operations related to setting link rate, once powerstate is
 * set and PLL disable request was processed.
 */
static int cdns_torrent_dp_configure_rate(struct cdns_torrent_phy *cdns_phy,
                                          struct phy_configure_opts_dp *dp)
{
        u32 ret;
        u32 read_val;

        /* Disable the cmn_pll0_en before re-programming the new data rate. */
        regmap_field_write(cdns_phy->phy_pma_pll_raw_ctrl, 0x0);

        /*
         * Wait for PLL ready de-assertion.
         * For PLL0 - PHY_PMA_CMN_CTRL2[2] == 1
         */
        ret = regmap_field_read_poll_timeout(cdns_phy->phy_pma_cmn_ctrl_2,
                                             read_val,
                                             ((read_val >> 2) & 0x01) != 0,
                                             0, POLL_TIMEOUT_US);
        if (ret)
                return ret;
        ndelay(200);

        /* DP Rate Change - VCO Output settings. */
        if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz) {
                /* PMA common configuration 19.2MHz */
                cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(cdns_phy, dp->link_rate,
                                                        dp->ssc);
                cdns_torrent_dp_pma_cmn_cfg_19_2mhz(cdns_phy);
        } else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz) {
                /* PMA common configuration 25MHz */
                cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy, dp->link_rate,
                                                      dp->ssc);
                cdns_torrent_dp_pma_cmn_cfg_25mhz(cdns_phy);
        }
        cdns_torrent_dp_pma_cmn_rate(cdns_phy, dp->link_rate, dp->lanes);

        /* Enable the cmn_pll0_en. */
        regmap_field_write(cdns_phy->phy_pma_pll_raw_ctrl, 0x3);

        /*
         * Wait for PLL ready assertion.
         * For PLL0 - PHY_PMA_CMN_CTRL2[0] == 1
         */
        ret = regmap_field_read_poll_timeout(cdns_phy->phy_pma_cmn_ctrl_2,
                                             read_val,
                                             (read_val & 0x01) != 0,
                                             0, POLL_TIMEOUT_US);
        return ret;
}

/*
 * Verify, that parameters to configure PHY with are correct.
 */
static int cdns_torrent_dp_verify_config(struct cdns_torrent_inst *inst,
                                         struct phy_configure_opts_dp *dp)
{
        u8 i;

        /* If changing link rate was required, verify it's supported. */
        if (dp->set_rate) {
                switch (dp->link_rate) {
                case 1620:
                case 2160:
                case 2430:
                case 2700:
                case 3240:
                case 4320:
                case 5400:
                case 8100:
                        /* valid bit rate */
                        break;
                default:
                        return -EINVAL;
                }
        }

        /* Verify lane count. */
        switch (dp->lanes) {
        case 1:
        case 2:
        case 4:
                /* valid lane count. */
                break;
        default:
                return -EINVAL;
        }

        /* Check against actual number of PHY's lanes. */
        if (dp->lanes > inst->num_lanes)
                return -EINVAL;

        /*
         * If changing voltages is required, check swing and pre-emphasis
         * levels, per-lane.
         */
        if (dp->set_voltages) {
                /* Lane count verified previously. */
                for (i = 0; i < dp->lanes; i++) {
                        if (dp->voltage[i] > 3 || dp->pre[i] > 3)
                                return -EINVAL;

                        /* Sum of voltage swing and pre-emphasis levels cannot
                         * exceed 3.
                         */
                        if (dp->voltage[i] + dp->pre[i] > 3)
                                return -EINVAL;
                }
        }

        return 0;
}

/* Set power state A0 and PLL clock enable to 0 on enabled lanes. */
static void cdns_torrent_dp_set_a0_pll(struct cdns_torrent_phy *cdns_phy,
                                       u32 num_lanes)
{
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;
        u32 pwr_state = cdns_torrent_dp_read(regmap,
                                             PHY_PMA_XCVR_POWER_STATE_REQ);
        u32 pll_clk_en = cdns_torrent_dp_read(regmap,
                                              PHY_PMA_XCVR_PLLCLK_EN);

        /* Lane 0 is always enabled. */
        pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK <<
                       PHY_POWER_STATE_LN_0);
        pll_clk_en &= ~0x01U;

        if (num_lanes > 1) {
                /* lane 1 */
                pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK <<
                               PHY_POWER_STATE_LN_1);
                pll_clk_en &= ~(0x01U << 1);
        }

        if (num_lanes > 2) {
                /* lanes 2 and 3 */
                pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK <<
                               PHY_POWER_STATE_LN_2);
                pwr_state &= ~(PMA_XCVR_POWER_STATE_REQ_LN_MASK <<
                               PHY_POWER_STATE_LN_3);
                pll_clk_en &= ~(0x01U << 2);
                pll_clk_en &= ~(0x01U << 3);
        }

        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_POWER_STATE_REQ, pwr_state);
        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, pll_clk_en);
}

/* Configure lane count as required. */
static int cdns_torrent_dp_set_lanes(struct cdns_torrent_phy *cdns_phy,
                                     struct phy_configure_opts_dp *dp)
{
        u32 value;
        u32 ret;
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;
        u8 lane_mask = (1 << dp->lanes) - 1;

        value = cdns_torrent_dp_read(regmap, PHY_RESET);
        /* clear pma_tx_elec_idle_ln_* bits. */
        value &= ~PMA_TX_ELEC_IDLE_MASK;
        /* Assert pma_tx_elec_idle_ln_* for disabled lanes. */
        value |= ((~lane_mask) << PMA_TX_ELEC_IDLE_SHIFT) &
                 PMA_TX_ELEC_IDLE_MASK;
        cdns_torrent_dp_write(regmap, PHY_RESET, value);

        /* reset the link by asserting phy_l00_reset_n low */
        cdns_torrent_dp_write(regmap, PHY_RESET,
                              value & (~PHY_L00_RESET_N_MASK));

        /*
         * Assert lane reset on unused lanes and lane 0 so they remain in reset
         * and powered down when re-enabling the link
         */
        value = (value & 0x0000FFF0) | (0x0000000E & lane_mask);
        cdns_torrent_dp_write(regmap, PHY_RESET, value);

        cdns_torrent_dp_set_a0_pll(cdns_phy, dp->lanes);

        /* release phy_l0*_reset_n based on used laneCount */
        value = (value & 0x0000FFF0) | (0x0000000F & lane_mask);
        cdns_torrent_dp_write(regmap, PHY_RESET, value);

        /* Wait, until PHY gets ready after releasing PHY reset signal. */
        ret = cdns_torrent_dp_wait_pma_cmn_ready(cdns_phy);
        if (ret)
                return ret;

        ndelay(100);

        /* release pma_xcvr_pllclk_en_ln_*, only for the master lane */
        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, 0x0001);

        ret = cdns_torrent_dp_run(cdns_phy, dp->lanes);

        return ret;
}

/* Configure link rate as required. */
static int cdns_torrent_dp_set_rate(struct cdns_torrent_phy *cdns_phy,
                                    struct phy_configure_opts_dp *dp)
{
        u32 ret;

        ret = cdns_torrent_dp_set_power_state(cdns_phy, dp->lanes,
                                              POWERSTATE_A3);
        if (ret)
                return ret;
        ret = cdns_torrent_dp_set_pll_en(cdns_phy, dp, false);
        if (ret)
                return ret;
        ndelay(200);

        ret = cdns_torrent_dp_configure_rate(cdns_phy, dp);
        if (ret)
                return ret;
        ndelay(200);

        ret = cdns_torrent_dp_set_pll_en(cdns_phy, dp, true);
        if (ret)
                return ret;
        ret = cdns_torrent_dp_set_power_state(cdns_phy, dp->lanes,
                                              POWERSTATE_A2);
        if (ret)
                return ret;
        ret = cdns_torrent_dp_set_power_state(cdns_phy, dp->lanes,
                                              POWERSTATE_A0);
        if (ret)
                return ret;
        ndelay(900);

        return ret;
}

/* Configure voltage swing and pre-emphasis for all enabled lanes. */
static void cdns_torrent_dp_set_voltages(struct cdns_torrent_phy *cdns_phy,
                                         struct phy_configure_opts_dp *dp)
{
        u8 lane;
        u16 val;

        for (lane = 0; lane < dp->lanes; lane++) {
                val = cdns_torrent_phy_read(cdns_phy->regmap_tx_lane_cdb[lane],
                                            TX_DIAG_ACYA);
                /*
                 * Write 1 to register bit TX_DIAG_ACYA[0] to freeze the
                 * current state of the analog TX driver.
                 */
                val |= TX_DIAG_ACYA_HBDC_MASK;
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_DIAG_ACYA, val);

                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_TXCC_CTRL, 0x08A4);
                val = vltg_coeff[dp->voltage[lane]][dp->pre[lane]].diag_tx_drv;
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       DRV_DIAG_TX_DRV, val);
                val = vltg_coeff[dp->voltage[lane]][dp->pre[lane]].mgnfs_mult;
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_TXCC_MGNFS_MULT_000,
                                       val);
                val = vltg_coeff[dp->voltage[lane]][dp->pre[lane]].cpost_mult;
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_TXCC_CPOST_MULT_00,
                                       val);

                val = cdns_torrent_phy_read(cdns_phy->regmap_tx_lane_cdb[lane],
                                            TX_DIAG_ACYA);
                /*
                 * Write 0 to register bit TX_DIAG_ACYA[0] to allow the state of
                 * analog TX driver to reflect the new programmed one.
                 */
                val &= ~TX_DIAG_ACYA_HBDC_MASK;
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_DIAG_ACYA, val);
        }
};

static int cdns_torrent_dp_configure(struct phy *phy,
                                     union phy_configure_opts *opts)
{
        struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
        struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
        int ret;

        ret = cdns_torrent_dp_verify_config(inst, &opts->dp);
        if (ret) {
                dev_err(&phy->dev, "invalid params for phy configure\n");
                return ret;
        }

        if (opts->dp.set_lanes) {
                ret = cdns_torrent_dp_set_lanes(cdns_phy, &opts->dp);
                if (ret) {
                        dev_err(&phy->dev, "cdns_torrent_dp_set_lanes failed\n");
                        return ret;
                }
        }

        if (opts->dp.set_rate) {
                ret = cdns_torrent_dp_set_rate(cdns_phy, &opts->dp);
                if (ret) {
                        dev_err(&phy->dev, "cdns_torrent_dp_set_rate failed\n");
                        return ret;
                }
        }

        if (opts->dp.set_voltages)
                cdns_torrent_dp_set_voltages(cdns_phy, &opts->dp);

        return ret;
}

static int cdns_torrent_dp_init(struct phy *phy)
{
        unsigned char lane_bits;
        int ret;
        struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
        struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;

        ret = clk_prepare_enable(cdns_phy->clk);
        if (ret) {
                dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
                return ret;
        }

        cdns_phy->ref_clk_rate = clk_get_rate(cdns_phy->clk);
        if (!(cdns_phy->ref_clk_rate)) {
                dev_err(cdns_phy->dev, "Failed to get ref clock rate\n");
                clk_disable_unprepare(cdns_phy->clk);
                return -EINVAL;
        }

        switch (cdns_phy->ref_clk_rate) {
        case REF_CLK_19_2MHz:
        case REF_CLK_25MHz:
                /* Valid Ref Clock Rate */
                break;
        default:
                dev_err(cdns_phy->dev, "Unsupported Ref Clock Rate\n");
                return -EINVAL;
        }

        cdns_torrent_dp_write(regmap, PHY_AUX_CTRL, 0x0003); /* enable AUX */

        /* PHY PMA registers configuration function */
        cdns_torrent_dp_pma_cfg(cdns_phy, inst);

        /*
         * Set lines power state to A0
         * Set lines pll clk enable to 0
         */
        cdns_torrent_dp_set_a0_pll(cdns_phy, inst->num_lanes);

        /*
         * release phy_l0*_reset_n and pma_tx_elec_idle_ln_* based on
         * used lanes
         */
        lane_bits = (1 << inst->num_lanes) - 1;
        cdns_torrent_dp_write(regmap, PHY_RESET,
                              ((0xF & ~lane_bits) << 4) | (0xF & lane_bits));

        /* release pma_xcvr_pllclk_en_ln_*, only for the master lane */
        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_PLLCLK_EN, 0x0001);

        /* PHY PMA registers configuration functions */
        /* Initialize PHY with max supported link rate, without SSC. */
        if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz)
                cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(cdns_phy,
                                                        cdns_phy->max_bit_rate,
                                                        false);
        else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz)
                cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(cdns_phy,
                                                      cdns_phy->max_bit_rate,
                                                      false);
        cdns_torrent_dp_pma_cmn_rate(cdns_phy, cdns_phy->max_bit_rate,
                                     inst->num_lanes);

        /* take out of reset */
        regmap_field_write(cdns_phy->phy_reset_ctrl, 0x1);

        cdns_torrent_phy_on(phy);

        ret = cdns_torrent_dp_wait_pma_cmn_ready(cdns_phy);
        if (ret)
                return ret;

        ret = cdns_torrent_dp_run(cdns_phy, inst->num_lanes);

        return ret;
}

static int cdns_torrent_dp_exit(struct phy *phy)
{
        struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);

        clk_disable_unprepare(cdns_phy->clk);
        return 0;
}

static
int cdns_torrent_dp_wait_pma_cmn_ready(struct cdns_torrent_phy *cdns_phy)
{
        unsigned int reg;
        int ret;
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;

        ret = regmap_read_poll_timeout(regmap, PHY_PMA_CMN_READY, reg,
                                       reg & 1, 0, POLL_TIMEOUT_US);
        if (ret == -ETIMEDOUT) {
                dev_err(cdns_phy->dev,
                        "timeout waiting for PMA common ready\n");
                return -ETIMEDOUT;
        }

        return 0;
}

static void cdns_torrent_dp_pma_cfg(struct cdns_torrent_phy *cdns_phy,
                                    struct cdns_torrent_inst *inst)
{
        unsigned int i;

        if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz)
                /* PMA common configuration 19.2MHz */
                cdns_torrent_dp_pma_cmn_cfg_19_2mhz(cdns_phy);
        else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz)
                /* PMA common configuration 25MHz */
                cdns_torrent_dp_pma_cmn_cfg_25mhz(cdns_phy);

        /* PMA lane configuration to deal with multi-link operation */
        for (i = 0; i < inst->num_lanes; i++)
                cdns_torrent_dp_pma_lane_cfg(cdns_phy, i);
}

static
void cdns_torrent_dp_pma_cmn_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy)
{
        struct regmap *regmap = cdns_phy->regmap_common_cdb;

        /* refclock registers - assumes 19.2 MHz refclock */
        cdns_torrent_phy_write(regmap, CMN_SSM_BIAS_TMR, 0x0014);
        cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLPRE_TMR, 0x0027);
        cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLLOCK_TMR, 0x00A1);
        cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLPRE_TMR, 0x0027);
        cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLLOCK_TMR, 0x00A1);
        cdns_torrent_phy_write(regmap, CMN_BGCAL_INIT_TMR, 0x0060);
        cdns_torrent_phy_write(regmap, CMN_BGCAL_ITER_TMR, 0x0060);
        cdns_torrent_phy_write(regmap, CMN_IBCAL_INIT_TMR, 0x0014);
        cdns_torrent_phy_write(regmap, CMN_TXPUCAL_INIT_TMR, 0x0018);
        cdns_torrent_phy_write(regmap, CMN_TXPUCAL_ITER_TMR, 0x0005);
        cdns_torrent_phy_write(regmap, CMN_TXPDCAL_INIT_TMR, 0x0018);
        cdns_torrent_phy_write(regmap, CMN_TXPDCAL_ITER_TMR, 0x0005);
        cdns_torrent_phy_write(regmap, CMN_RXCAL_INIT_TMR, 0x0240);
        cdns_torrent_phy_write(regmap, CMN_RXCAL_ITER_TMR, 0x0005);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_INIT_TMR, 0x0002);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_ITER_TMR, 0x0002);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_REFTIM_START, 0x000B);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_PLLCNT_START, 0x0137);

        /* PLL registers */
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
        cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
        cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_INIT_TMR, 0x00C0);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_INIT_TMR, 0x00C0);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_REFTIM_START, 0x0260);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_TCTRL, 0x0003);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_REFTIM_START, 0x0260);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_TCTRL, 0x0003);
}

/*
 * Set registers responsible for enabling and configuring SSC, with second and
 * third register values provided by parameters.
 */
static
void cdns_torrent_dp_enable_ssc_19_2mhz(struct cdns_torrent_phy *cdns_phy,
                                        u32 ctrl2_val, u32 ctrl3_val)
{
        struct regmap *regmap = cdns_phy->regmap_common_cdb;

        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0001);
        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, ctrl2_val);
        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, ctrl3_val);
        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0003);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0001);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, ctrl2_val);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, ctrl3_val);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0003);
}

static
void cdns_torrent_dp_pma_cmn_vco_cfg_19_2mhz(struct cdns_torrent_phy *cdns_phy,
                                             u32 rate, bool ssc)
{
        struct regmap *regmap = cdns_phy->regmap_common_cdb;

        /* Assumes 19.2 MHz refclock */
        switch (rate) {
        /* Setting VCO for 10.8GHz */
        case 2700:
        case 5400:
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_INTDIV_M0, 0x0119);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVL_M0, 0x4000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_HIGH_THR_M0, 0x00BC);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL0_CTRL_M0, 0x0012);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_INTDIV_M0, 0x0119);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVL_M0, 0x4000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_HIGH_THR_M0, 0x00BC);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL1_CTRL_M0, 0x0012);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x033A,
                                                           0x006A);
                break;
        /* Setting VCO for 9.72GHz */
        case 1620:
        case 2430:
        case 3240:
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_INTDIV_M0, 0x01FA);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVL_M0, 0x4000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_HIGH_THR_M0, 0x0152);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_INTDIV_M0, 0x01FA);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVL_M0, 0x4000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_HIGH_THR_M0, 0x0152);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x05DD,
                                                           0x0069);
                break;
        /* Setting VCO for 8.64GHz */
        case 2160:
        case 4320:
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_INTDIV_M0, 0x01C2);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVL_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_HIGH_THR_M0, 0x012C);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_INTDIV_M0, 0x01C2);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVL_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_HIGH_THR_M0, 0x012C);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x0536,
                                                           0x0069);
                break;
        /* Setting VCO for 8.1GHz */
        case 8100:
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_INTDIV_M0, 0x01A5);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVL_M0, 0xE000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_HIGH_THR_M0, 0x011A);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_INTDIV_M0, 0x01A5);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVL_M0, 0xE000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_HIGH_THR_M0, 0x011A);
                cdns_torrent_phy_write(regmap,
                                       CMN_PDIAG_PLL1_CTRL_M0, 0x0002);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_19_2mhz(cdns_phy, 0x04D7,
                                                           0x006A);
                break;
        }

        if (ssc) {
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_VCOCAL_PLLCNT_START, 0x025E);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_LOCK_PLLCNT_THR, 0x0005);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_VCOCAL_PLLCNT_START, 0x025E);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_LOCK_PLLCNT_THR, 0x0005);
        } else {
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_VCOCAL_PLLCNT_START, 0x0260);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_VCOCAL_PLLCNT_START, 0x0260);
                /* Set reset register values to disable SSC */
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_SS_CTRL1_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_SS_CTRL2_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_SS_CTRL3_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_SS_CTRL4_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_LOCK_PLLCNT_THR, 0x0003);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_SS_CTRL1_M0, 0x0002);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_SS_CTRL2_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_SS_CTRL3_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_SS_CTRL4_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_LOCK_PLLCNT_THR, 0x0003);
        }

        cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_REFCNT_START, 0x0099);
        cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_START, 0x0099);
        cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_REFCNT_START, 0x0099);
        cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_START, 0x0099);
}

static
void cdns_torrent_dp_pma_cmn_cfg_25mhz(struct cdns_torrent_phy *cdns_phy)
{
        struct regmap *regmap = cdns_phy->regmap_common_cdb;

        /* refclock registers - assumes 25 MHz refclock */
        cdns_torrent_phy_write(regmap, CMN_SSM_BIAS_TMR, 0x0019);
        cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLPRE_TMR, 0x0032);
        cdns_torrent_phy_write(regmap, CMN_PLLSM0_PLLLOCK_TMR, 0x00D1);
        cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLPRE_TMR, 0x0032);
        cdns_torrent_phy_write(regmap, CMN_PLLSM1_PLLLOCK_TMR, 0x00D1);
        cdns_torrent_phy_write(regmap, CMN_BGCAL_INIT_TMR, 0x007D);
        cdns_torrent_phy_write(regmap, CMN_BGCAL_ITER_TMR, 0x007D);
        cdns_torrent_phy_write(regmap, CMN_IBCAL_INIT_TMR, 0x0019);
        cdns_torrent_phy_write(regmap, CMN_TXPUCAL_INIT_TMR, 0x001E);
        cdns_torrent_phy_write(regmap, CMN_TXPUCAL_ITER_TMR, 0x0006);
        cdns_torrent_phy_write(regmap, CMN_TXPDCAL_INIT_TMR, 0x001E);
        cdns_torrent_phy_write(regmap, CMN_TXPDCAL_ITER_TMR, 0x0006);
        cdns_torrent_phy_write(regmap, CMN_RXCAL_INIT_TMR, 0x02EE);
        cdns_torrent_phy_write(regmap, CMN_RXCAL_ITER_TMR, 0x0006);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_INIT_TMR, 0x0002);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_ITER_TMR, 0x0002);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_REFTIM_START, 0x000E);
        cdns_torrent_phy_write(regmap, CMN_SD_CAL_PLLCNT_START, 0x012B);

        /* PLL registers */
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_PADJ_M0, 0x0509);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CP_IADJ_M0, 0x0F00);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_FILT_PADJ_M0, 0x0F08);
        cdns_torrent_phy_write(regmap, CMN_PLL0_DSM_DIAG_M0, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_PADJ_M0, 0x0509);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CP_IADJ_M0, 0x0F00);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_FILT_PADJ_M0, 0x0F08);
        cdns_torrent_phy_write(regmap, CMN_PLL1_DSM_DIAG_M0, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_INIT_TMR, 0x00FA);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_ITER_TMR, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_INIT_TMR, 0x00FA);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_ITER_TMR, 0x0004);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_REFTIM_START, 0x0317);
        cdns_torrent_phy_write(regmap, CMN_PLL0_VCOCAL_TCTRL, 0x0003);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_REFTIM_START, 0x0317);
        cdns_torrent_phy_write(regmap, CMN_PLL1_VCOCAL_TCTRL, 0x0003);
}

/*
 * Set registers responsible for enabling and configuring SSC, with second
 * register value provided by a parameter.
 */
static void cdns_torrent_dp_enable_ssc_25mhz(struct cdns_torrent_phy *cdns_phy,
                                             u32 ctrl2_val)
{
        struct regmap *regmap = cdns_phy->regmap_common_cdb;

        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0001);
        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, ctrl2_val);
        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x007F);
        cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0003);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0001);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, ctrl2_val);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x007F);
        cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0003);
}

static
void cdns_torrent_dp_pma_cmn_vco_cfg_25mhz(struct cdns_torrent_phy *cdns_phy,
                                           u32 rate, bool ssc)
{
        struct regmap *regmap = cdns_phy->regmap_common_cdb;

        /* Assumes 25 MHz refclock */
        switch (rate) {
        /* Setting VCO for 10.8GHz */
        case 2700:
        case 5400:
                cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x01B0);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0120);
                cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x01B0);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0120);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x0423);
                break;
        /* Setting VCO for 9.72GHz */
        case 1620:
        case 2430:
        case 3240:
                cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0184);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0xCCCD);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x0104);
                cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0184);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0xCCCD);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x0104);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x03B9);
                break;
        /* Setting VCO for 8.64GHz */
        case 2160:
        case 4320:
                cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0159);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x999A);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x00E7);
                cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0159);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x999A);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x00E7);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x034F);
                break;
        /* Setting VCO for 8.1GHz */
        case 8100:
                cdns_torrent_phy_write(regmap, CMN_PLL0_INTDIV_M0, 0x0144);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVL_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL0_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL0_HIGH_THR_M0, 0x00D8);
                cdns_torrent_phy_write(regmap, CMN_PLL1_INTDIV_M0, 0x0144);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVL_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL1_FRACDIVH_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL1_HIGH_THR_M0, 0x00D8);
                if (ssc)
                        cdns_torrent_dp_enable_ssc_25mhz(cdns_phy, 0x031A);
                break;
        }

        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL0_CTRL_M0, 0x0002);
        cdns_torrent_phy_write(regmap, CMN_PDIAG_PLL1_CTRL_M0, 0x0002);

        if (ssc) {
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_VCOCAL_PLLCNT_START, 0x0315);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_LOCK_PLLCNT_THR, 0x0005);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_VCOCAL_PLLCNT_START, 0x0315);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_LOCK_PLLCNT_THR, 0x0005);
        } else {
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_VCOCAL_PLLCNT_START, 0x0317);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_VCOCAL_PLLCNT_START, 0x0317);
                /* Set reset register values to disable SSC */
                cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL1_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL2_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL3_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL0_SS_CTRL4_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL0_LOCK_PLLCNT_THR, 0x0003);
                cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL1_M0, 0x0002);
                cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL2_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL3_M0, 0x0000);
                cdns_torrent_phy_write(regmap, CMN_PLL1_SS_CTRL4_M0, 0x0000);
                cdns_torrent_phy_write(regmap,
                                       CMN_PLL1_LOCK_PLLCNT_THR, 0x0003);
        }

        cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_REFCNT_START, 0x00C7);
        cdns_torrent_phy_write(regmap, CMN_PLL0_LOCK_PLLCNT_START, 0x00C7);
        cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_REFCNT_START, 0x00C7);
        cdns_torrent_phy_write(regmap, CMN_PLL1_LOCK_PLLCNT_START, 0x00C7);
}

static void cdns_torrent_dp_pma_cmn_rate(struct cdns_torrent_phy *cdns_phy,
                                         u32 rate, u32 num_lanes)
{
        unsigned int clk_sel_val = 0;
        unsigned int hsclk_div_val = 0;
        unsigned int i;

        /* 16'h0000 for single DP link configuration */
        regmap_field_write(cdns_phy->phy_pll_cfg, 0x0);

        switch (rate) {
        case 1620:
                clk_sel_val = 0x0f01;
                hsclk_div_val = 2;
                break;
        case 2160:
        case 2430:
        case 2700:
                clk_sel_val = 0x0701;
                hsclk_div_val = 1;
                break;
        case 3240:
                clk_sel_val = 0x0b00;
                hsclk_div_val = 2;
                break;
        case 4320:
        case 5400:
                clk_sel_val = 0x0301;
                hsclk_div_val = 0;
                break;
        case 8100:
                clk_sel_val = 0x0200;
                hsclk_div_val = 0;
                break;
        }

        cdns_torrent_phy_write(cdns_phy->regmap_common_cdb,
                               CMN_PDIAG_PLL0_CLK_SEL_M0, clk_sel_val);
        cdns_torrent_phy_write(cdns_phy->regmap_common_cdb,
                               CMN_PDIAG_PLL1_CLK_SEL_M0, clk_sel_val);

        /* PMA lane configuration to deal with multi-link operation */
        for (i = 0; i < num_lanes; i++)
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[i],
                                       XCVR_DIAG_HSCLK_DIV, hsclk_div_val);
}

static void cdns_torrent_dp_pma_lane_cfg(struct cdns_torrent_phy *cdns_phy,
                                         unsigned int lane)
{
        /* Per lane, refclock-dependent receiver detection setting */
        if (cdns_phy->ref_clk_rate == REF_CLK_19_2MHz)
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_RCVDET_ST_TMR, 0x0780);
        else if (cdns_phy->ref_clk_rate == REF_CLK_25MHz)
                cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                                       TX_RCVDET_ST_TMR, 0x09C4);

        /* Writing Tx/Rx Power State Controllers registers */
        cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                               TX_PSC_A0, 0x00FB);
        cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                               TX_PSC_A2, 0x04AA);
        cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                               TX_PSC_A3, 0x04AA);
        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_PSC_A0, 0x0000);
        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_PSC_A2, 0x0000);
        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_PSC_A3, 0x0000);

        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_PSC_CAL, 0x0000);

        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_REE_GCSM1_CTRL, 0x0000);
        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_REE_GCSM2_CTRL, 0x0000);
        cdns_torrent_phy_write(cdns_phy->regmap_rx_lane_cdb[lane],
                               RX_REE_PERGCSM_CTRL, 0x0000);

        cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                               XCVR_DIAG_BIDI_CTRL, 0x000F);
        cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                               XCVR_DIAG_PLLDRC_CTRL, 0x0001);
        cdns_torrent_phy_write(cdns_phy->regmap_tx_lane_cdb[lane],
                               XCVR_DIAG_HSCLK_SEL, 0x0000);
}

static int cdns_torrent_dp_set_power_state(struct cdns_torrent_phy *cdns_phy,
                                           u32 num_lanes,
                                           enum phy_powerstate powerstate)
{
        /* Register value for power state for a single byte. */
        u32 value_part;
        u32 value;
        u32 mask;
        u32 read_val;
        u32 ret;
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;

        switch (powerstate) {
        case (POWERSTATE_A0):
                value_part = 0x01U;
                break;
        case (POWERSTATE_A2):
                value_part = 0x04U;
                break;
        default:
                /* Powerstate A3 */
                value_part = 0x08U;
                break;
        }

        /* Select values of registers and mask, depending on enabled
         * lane count.
         */
        switch (num_lanes) {
        /* lane 0 */
        case (1):
                value = value_part;
                mask = 0x0000003FU;
                break;
        /* lanes 0-1 */
        case (2):
                value = (value_part
                         | (value_part << 8));
                mask = 0x00003F3FU;
                break;
        /* lanes 0-3, all */
        default:
                value = (value_part
                         | (value_part << 8)
                         | (value_part << 16)
                         | (value_part << 24));
                mask = 0x3F3F3F3FU;
                break;
        }

        /* Set power state A<n>. */
        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_POWER_STATE_REQ, value);
        /* Wait, until PHY acknowledges power state completion. */
        ret = regmap_read_poll_timeout(regmap, PHY_PMA_XCVR_POWER_STATE_ACK,
                                       read_val, (read_val & mask) == value, 0,
                                       POLL_TIMEOUT_US);
        cdns_torrent_dp_write(regmap, PHY_PMA_XCVR_POWER_STATE_REQ, 0x00000000);
        ndelay(100);

        return ret;
}

static int cdns_torrent_dp_run(struct cdns_torrent_phy *cdns_phy, u32 num_lanes)
{
        unsigned int read_val;
        int ret;
        struct regmap *regmap = cdns_phy->regmap_dptx_phy_reg;

        /*
         * waiting for ACK of pma_xcvr_pllclk_en_ln_*, only for the
         * master lane
         */
        ret = regmap_read_poll_timeout(regmap, PHY_PMA_XCVR_PLLCLK_EN_ACK,
                                       read_val, read_val & 1,
                                       0, POLL_TIMEOUT_US);
        if (ret == -ETIMEDOUT) {
                dev_err(cdns_phy->dev,
                        "timeout waiting for link PLL clock enable ack\n");
                return ret;
        }

        ndelay(100);

        ret = cdns_torrent_dp_set_power_state(cdns_phy, num_lanes,
                                              POWERSTATE_A2);
        if (ret)
                return ret;

        ret = cdns_torrent_dp_set_power_state(cdns_phy, num_lanes,
                                              POWERSTATE_A0);

        return ret;
}

static int cdns_torrent_phy_on(struct phy *phy)
{
        struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
        struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
        int ret;

        /* Take the PHY out of reset */
        ret = reset_control_deassert(cdns_phy->phy_rst);
        if (ret)
                return ret;

        /* Take the PHY lane group out of reset */
        return reset_control_deassert(inst->lnk_rst);
}

static int cdns_torrent_phy_off(struct phy *phy)
{
        struct cdns_torrent_inst *inst = phy_get_drvdata(phy);
        struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(phy->dev.parent);
        int ret;

        ret = reset_control_assert(cdns_phy->phy_rst);
        if (ret)
                return ret;

        return reset_control_assert(inst->lnk_rst);
}

static struct regmap *cdns_regmap_init(struct device *dev, void __iomem *base,
                                       u32 block_offset,
                                       u8 reg_offset_shift,
                                       const struct regmap_config *config)
{
        struct cdns_regmap_cdb_context *ctx;

        ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
        if (!ctx)
                return ERR_PTR(-ENOMEM);

        ctx->dev = dev;
        ctx->base = base + block_offset;
        ctx->reg_offset_shift = reg_offset_shift;

        return devm_regmap_init(dev, NULL, ctx, config);
}

static int cdns_regfield_init(struct cdns_torrent_phy *cdns_phy)
{
        struct device *dev = cdns_phy->dev;
        struct regmap_field *field;
        struct regmap *regmap;

        regmap = cdns_phy->regmap_phy_pcs_common_cdb;
        field = devm_regmap_field_alloc(dev, regmap, phy_pll_cfg);
        if (IS_ERR(field)) {
                dev_err(dev, "PHY_PLL_CFG reg field init failed\n");
                return PTR_ERR(field);
        }
        cdns_phy->phy_pll_cfg = field;

        regmap = cdns_phy->regmap_phy_pma_common_cdb;
        field = devm_regmap_field_alloc(dev, regmap, phy_pma_cmn_ctrl_2);
        if (IS_ERR(field)) {
                dev_err(dev, "PHY_PMA_CMN_CTRL2 reg field init failed\n");
                return PTR_ERR(field);
        }
        cdns_phy->phy_pma_cmn_ctrl_2 = field;

        regmap = cdns_phy->regmap_phy_pma_common_cdb;
        field = devm_regmap_field_alloc(dev, regmap, phy_pma_pll_raw_ctrl);
        if (IS_ERR(field)) {
                dev_err(dev, "PHY_PMA_PLL_RAW_CTRL reg field init failed\n");
                return PTR_ERR(field);
        }
        cdns_phy->phy_pma_pll_raw_ctrl = field;

        regmap = cdns_phy->regmap_dptx_phy_reg;
        field = devm_regmap_field_alloc(dev, regmap, phy_reset_ctrl);
        if (IS_ERR(field)) {
                dev_err(dev, "PHY_RESET reg field init failed\n");
                return PTR_ERR(field);
        }
        cdns_phy->phy_reset_ctrl = field;

        return 0;
}

static int cdns_regmap_init_torrent_dp(struct cdns_torrent_phy *cdns_phy,
                                       void __iomem *sd_base,
                                       void __iomem *base,
                                       u8 block_offset_shift,
                                       u8 reg_offset_shift)
{
        struct device *dev = cdns_phy->dev;
        struct regmap *regmap;
        u32 block_offset;
        int i;

        for (i = 0; i < MAX_NUM_LANES; i++) {
                block_offset = TORRENT_TX_LANE_CDB_OFFSET(i, block_offset_shift,
                                                          reg_offset_shift);
                regmap = cdns_regmap_init(dev, sd_base, block_offset,
                                          reg_offset_shift,
                                          &cdns_torrent_tx_lane_cdb_config[i]);
                if (IS_ERR(regmap)) {
                        dev_err(dev, "Failed to init tx lane CDB regmap\n");
                        return PTR_ERR(regmap);
                }
                cdns_phy->regmap_tx_lane_cdb[i] = regmap;

                block_offset = TORRENT_RX_LANE_CDB_OFFSET(i, block_offset_shift,
                                                          reg_offset_shift);
                regmap = cdns_regmap_init(dev, sd_base, block_offset,
                                          reg_offset_shift,
                                          &cdns_torrent_rx_lane_cdb_config[i]);
                if (IS_ERR(regmap)) {
                        dev_err(dev, "Failed to init rx lane CDB regmap\n");
                        return PTR_ERR(regmap);
                }
                cdns_phy->regmap_rx_lane_cdb[i] = regmap;
        }

        block_offset = TORRENT_COMMON_CDB_OFFSET;
        regmap = cdns_regmap_init(dev, sd_base, block_offset,
                                  reg_offset_shift,
                                  &cdns_torrent_common_cdb_config);
        if (IS_ERR(regmap)) {
                dev_err(dev, "Failed to init common CDB regmap\n");
                return PTR_ERR(regmap);
        }
        cdns_phy->regmap_common_cdb = regmap;

        block_offset = TORRENT_PHY_PCS_COMMON_OFFSET(block_offset_shift);
        regmap = cdns_regmap_init(dev, sd_base, block_offset,
                                  reg_offset_shift,
                                  &cdns_torrent_phy_pcs_cmn_cdb_config);
        if (IS_ERR(regmap)) {
                dev_err(dev, "Failed to init PHY PCS common CDB regmap\n");
                return PTR_ERR(regmap);
        }
        cdns_phy->regmap_phy_pcs_common_cdb = regmap;

        block_offset = TORRENT_PHY_PMA_COMMON_OFFSET(block_offset_shift);
        regmap = cdns_regmap_init(dev, sd_base, block_offset,
                                  reg_offset_shift,
                                  &cdns_torrent_phy_pma_cmn_cdb_config);
        if (IS_ERR(regmap)) {
                dev_err(dev, "Failed to init PHY PMA common CDB regmap\n");
                return PTR_ERR(regmap);
        }
        cdns_phy->regmap_phy_pma_common_cdb = regmap;

        block_offset = TORRENT_DPTX_PHY_OFFSET;
        regmap = cdns_regmap_init(dev, base, block_offset,
                                  reg_offset_shift,
                                  &cdns_torrent_dptx_phy_config);
        if (IS_ERR(regmap)) {
                dev_err(dev, "Failed to init DPTX PHY regmap\n");
                return PTR_ERR(regmap);
        }
        cdns_phy->regmap_dptx_phy_reg = regmap;

        return 0;
}

static int cdns_torrent_phy_probe(struct platform_device *pdev)
{
        struct resource *regs;
        struct cdns_torrent_phy *cdns_phy;
        struct device *dev = &pdev->dev;
        struct phy_provider *phy_provider;
        const struct of_device_id *match;
        struct cdns_torrent_data *data;
        struct device_node *child;
        int ret, subnodes, node = 0, i;

        /* Get init data for this PHY */
        match = of_match_device(cdns_torrent_phy_of_match, dev);
        if (!match)
                return -EINVAL;

        data = (struct cdns_torrent_data *)match->data;

        cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL);
        if (!cdns_phy)
                return -ENOMEM;

        dev_set_drvdata(dev, cdns_phy);
        cdns_phy->dev = dev;

        cdns_phy->phy_rst = devm_reset_control_get_exclusive_by_index(dev, 0);
        if (IS_ERR(cdns_phy->phy_rst)) {
                dev_err(dev, "%s: failed to get reset\n",
                        dev->of_node->full_name);
                return PTR_ERR(cdns_phy->phy_rst);
        }

        cdns_phy->clk = devm_clk_get(dev, "refclk");
        if (IS_ERR(cdns_phy->clk)) {
                dev_err(dev, "phy ref clock not found\n");
                return PTR_ERR(cdns_phy->clk);
        }

        regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        cdns_phy->sd_base = devm_ioremap_resource(&pdev->dev, regs);
        if (IS_ERR(cdns_phy->sd_base))
                return PTR_ERR(cdns_phy->sd_base);

        subnodes = of_get_available_child_count(dev->of_node);
        if (subnodes == 0) {
                dev_err(dev, "No available link subnodes found\n");
                return -EINVAL;
        } else if (subnodes != 1) {
                dev_err(dev, "Driver supports only one link subnode.\n");
                return -EINVAL;
        }

        for_each_available_child_of_node(dev->of_node, child) {
                struct phy *gphy;

                cdns_phy->phys[node].lnk_rst =
                                of_reset_control_array_get_exclusive(child);
                if (IS_ERR(cdns_phy->phys[node].lnk_rst)) {
                        dev_err(dev, "%s: failed to get reset\n",
                                child->full_name);
                        ret = PTR_ERR(cdns_phy->phys[node].lnk_rst);
                        goto put_lnk_rst;
                }

                if (of_property_read_u32(child, "reg",
                                         &cdns_phy->phys[node].mlane)) {
                        dev_err(dev, "%s: No \"reg\"-property.\n",
                                child->full_name);
                        ret = -EINVAL;
                        goto put_child;
                }

                if (cdns_phy->phys[node].mlane != 0) {
                        dev_err(dev,
                                "%s: Driver supports only lane-0 as master lane.\n",
                                child->full_name);
                        ret = -EINVAL;
                        goto put_child;
                }

                if (of_property_read_u32(child, "cdns,phy-type",
                                         &cdns_phy->phys[node].phy_type)) {
                        dev_err(dev, "%s: No \"cdns,phy-type\"-property.\n",
                                child->full_name);
                        ret = -EINVAL;
                        goto put_child;
                }

                cdns_phy->phys[node].num_lanes = DEFAULT_NUM_LANES;
                of_property_read_u32(child, "cdns,num-lanes",
                                     &cdns_phy->phys[node].num_lanes);

                if (cdns_phy->phys[node].phy_type == PHY_TYPE_DP) {
                        switch (cdns_phy->phys[node].num_lanes) {
                        case 1:
                        case 2:
                        case 4:
                        /* valid number of lanes */
                                break;
                        default:
                                dev_err(dev, "unsupported number of lanes: %d\n",
                                        cdns_phy->phys[node].num_lanes);
                                ret = -EINVAL;
                                goto put_child;
                        }

                        cdns_phy->max_bit_rate = DEFAULT_MAX_BIT_RATE;
                        of_property_read_u32(child, "cdns,max-bit-rate",
                                             &cdns_phy->max_bit_rate);

                        switch (cdns_phy->max_bit_rate) {
                        case 1620:
                        case 2160:
                        case 2430:
                        case 2700:
                        case 3240:
                        case 4320:
                        case 5400:
                        case 8100:
                        /* valid bit rate */
                                break;
                        default:
                                dev_err(dev, "unsupported max bit rate: %dMbps\n",
                                        cdns_phy->max_bit_rate);
                                ret = -EINVAL;
                                goto put_child;
                        }

                        /* DPTX registers */
                        regs = platform_get_resource(pdev, IORESOURCE_MEM, 1);
                        cdns_phy->base = devm_ioremap_resource(&pdev->dev,
                                                               regs);
                        if (IS_ERR(cdns_phy->base)) {
                                ret = PTR_ERR(cdns_phy->base);
                                goto put_child;
                        }

                        gphy = devm_phy_create(dev, child,
                                               &cdns_torrent_phy_ops);
                        if (IS_ERR(gphy)) {
                                ret = PTR_ERR(gphy);
                                goto put_child;
                        }

                        dev_info(dev, "%d lanes, max bit rate %d.%03d Gbps\n",
                                 cdns_phy->phys[node].num_lanes,
                                 cdns_phy->max_bit_rate / 1000,
                                 cdns_phy->max_bit_rate % 1000);
                } else {
                        dev_err(dev, "Driver supports only PHY_TYPE_DP\n");
                        ret = -ENOTSUPP;
                        goto put_child;
                }
                cdns_phy->phys[node].phy = gphy;
                phy_set_drvdata(gphy, &cdns_phy->phys[node]);

                node++;
        }
        cdns_phy->nsubnodes = node;

        ret = cdns_regmap_init_torrent_dp(cdns_phy, cdns_phy->sd_base,
                                          cdns_phy->base,
                                          data->block_offset_shift,
                                          data->reg_offset_shift);
        if (ret)
                goto put_lnk_rst;

        ret = cdns_regfield_init(cdns_phy);
        if (ret)
                goto put_lnk_rst;

        phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
        if (IS_ERR(phy_provider)) {
                ret = PTR_ERR(phy_provider);
                goto put_lnk_rst;
        }

        return 0;

put_child:
        node++;
put_lnk_rst:
        for (i = 0; i < node; i++)
                reset_control_put(cdns_phy->phys[i].lnk_rst);
        of_node_put(child);
        return ret;
}

static int cdns_torrent_phy_remove(struct platform_device *pdev)
{
        struct cdns_torrent_phy *cdns_phy = platform_get_drvdata(pdev);
        int i;

        reset_control_assert(cdns_phy->phy_rst);
        for (i = 0; i < cdns_phy->nsubnodes; i++) {
                reset_control_assert(cdns_phy->phys[i].lnk_rst);
                reset_control_put(cdns_phy->phys[i].lnk_rst);
        }

        return 0;
}

static const struct cdns_torrent_data cdns_map_torrent = {
        .block_offset_shift = 0x2,
        .reg_offset_shift = 0x2,
};

static const struct cdns_torrent_data ti_j721e_map_torrent = {
        .block_offset_shift = 0x0,
        .reg_offset_shift = 0x1,
};

static const struct of_device_id cdns_torrent_phy_of_match[] = {
        {
                .compatible = "cdns,torrent-phy",
                .data = &cdns_map_torrent,
        },
        {
                .compatible = "ti,j721e-serdes-10g",
                .data = &ti_j721e_map_torrent,
        },
        {}
};
MODULE_DEVICE_TABLE(of, cdns_torrent_phy_of_match);

static struct platform_driver cdns_torrent_phy_driver = {
        .probe  = cdns_torrent_phy_probe,
        .remove = cdns_torrent_phy_remove,
        .driver = {
                .name   = "cdns-torrent-phy",
                .of_match_table = cdns_torrent_phy_of_match,
        }
};
module_platform_driver(cdns_torrent_phy_driver);

MODULE_AUTHOR("Cadence Design Systems, Inc.");
MODULE_DESCRIPTION("Cadence Torrent PHY driver");
MODULE_LICENSE("GPL v2");