// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2015 MediaTek Inc.
 * Author: Chunfeng Yun <chunfeng.yun@mediatek.com>
 *
 */

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

/* version V1 sub-banks offset base address */
/* banks shared by multiple phys */
#define SSUSB_SIFSLV_V1_SPLLC           0x000   /* shared by u3 phys */
#define SSUSB_SIFSLV_V1_U2FREQ          0x100   /* shared by u2 phys */
#define SSUSB_SIFSLV_V1_CHIP            0x300   /* shared by u3 phys */
/* u2 phy bank */
#define SSUSB_SIFSLV_V1_U2PHY_COM       0x000
/* u3/pcie/sata phy banks */
#define SSUSB_SIFSLV_V1_U3PHYD          0x000
#define SSUSB_SIFSLV_V1_U3PHYA          0x200

/* version V2 sub-banks offset base address */
/* u2 phy banks */
#define SSUSB_SIFSLV_V2_MISC            0x000
#define SSUSB_SIFSLV_V2_U2FREQ          0x100
#define SSUSB_SIFSLV_V2_U2PHY_COM       0x300
/* u3/pcie/sata phy banks */
#define SSUSB_SIFSLV_V2_SPLLC           0x000
#define SSUSB_SIFSLV_V2_CHIP            0x100
#define SSUSB_SIFSLV_V2_U3PHYD          0x200
#define SSUSB_SIFSLV_V2_U3PHYA          0x400

#define U3P_USBPHYACR0          0x000
#define PA0_RG_U2PLL_FORCE_ON           BIT(15)
#define PA0_RG_USB20_INTR_EN            BIT(5)

#define U3P_USBPHYACR1          0x004
#define PA1_RG_VRT_SEL                  GENMASK(14, 12)
#define PA1_RG_VRT_SEL_VAL(x)   ((0x7 & (x)) << 12)
#define PA1_RG_TERM_SEL         GENMASK(10, 8)
#define PA1_RG_TERM_SEL_VAL(x)  ((0x7 & (x)) << 8)

#define U3P_USBPHYACR2          0x008
#define PA2_RG_SIF_U2PLL_FORCE_EN       BIT(18)

#define U3P_USBPHYACR5          0x014
#define PA5_RG_U2_HSTX_SRCAL_EN BIT(15)
#define PA5_RG_U2_HSTX_SRCTRL           GENMASK(14, 12)
#define PA5_RG_U2_HSTX_SRCTRL_VAL(x)    ((0x7 & (x)) << 12)
#define PA5_RG_U2_HS_100U_U3_EN BIT(11)

#define U3P_USBPHYACR6          0x018
#define PA6_RG_U2_BC11_SW_EN            BIT(23)
#define PA6_RG_U2_OTG_VBUSCMP_EN        BIT(20)
#define PA6_RG_U2_SQTH          GENMASK(3, 0)
#define PA6_RG_U2_SQTH_VAL(x)   (0xf & (x))

#define U3P_U2PHYACR4           0x020
#define P2C_RG_USB20_GPIO_CTL           BIT(9)
#define P2C_USB20_GPIO_MODE             BIT(8)
#define P2C_U2_GPIO_CTR_MSK     (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)

#define U3D_U2PHYDCR0           0x060
#define P2C_RG_SIF_U2PLL_FORCE_ON       BIT(24)

#define U3P_U2PHYDTM0           0x068
#define P2C_FORCE_UART_EN               BIT(26)
#define P2C_FORCE_DATAIN                BIT(23)
#define P2C_FORCE_DM_PULLDOWN           BIT(21)
#define P2C_FORCE_DP_PULLDOWN           BIT(20)
#define P2C_FORCE_XCVRSEL               BIT(19)
#define P2C_FORCE_SUSPENDM              BIT(18)
#define P2C_FORCE_TERMSEL               BIT(17)
#define P2C_RG_DATAIN                   GENMASK(13, 10)
#define P2C_RG_DATAIN_VAL(x)            ((0xf & (x)) << 10)
#define P2C_RG_DMPULLDOWN               BIT(7)
#define P2C_RG_DPPULLDOWN               BIT(6)
#define P2C_RG_XCVRSEL                  GENMASK(5, 4)
#define P2C_RG_XCVRSEL_VAL(x)           ((0x3 & (x)) << 4)
#define P2C_RG_SUSPENDM                 BIT(3)
#define P2C_RG_TERMSEL                  BIT(2)
#define P2C_DTM0_PART_MASK \
                (P2C_FORCE_DATAIN | P2C_FORCE_DM_PULLDOWN | \
                P2C_FORCE_DP_PULLDOWN | P2C_FORCE_XCVRSEL | \
                P2C_FORCE_TERMSEL | P2C_RG_DMPULLDOWN | \
                P2C_RG_DPPULLDOWN | P2C_RG_TERMSEL)

#define U3P_U2PHYDTM1           0x06C
#define P2C_RG_UART_EN                  BIT(16)
#define P2C_FORCE_IDDIG         BIT(9)
#define P2C_RG_VBUSVALID                BIT(5)
#define P2C_RG_SESSEND                  BIT(4)
#define P2C_RG_AVALID                   BIT(2)
#define P2C_RG_IDDIG                    BIT(1)

#define U3P_U2PHYBC12C          0x080
#define P2C_RG_CHGDT_EN         BIT(0)

#define U3P_U3_CHIP_GPIO_CTLD           0x0c
#define P3C_REG_IP_SW_RST               BIT(31)
#define P3C_MCU_BUS_CK_GATE_EN          BIT(30)
#define P3C_FORCE_IP_SW_RST             BIT(29)

#define U3P_U3_CHIP_GPIO_CTLE           0x10
#define P3C_RG_SWRST_U3_PHYD            BIT(25)
#define P3C_RG_SWRST_U3_PHYD_FORCE_EN   BIT(24)

#define U3P_U3_PHYA_REG0        0x000
#define P3A_RG_CLKDRV_OFF               GENMASK(3, 2)
#define P3A_RG_CLKDRV_OFF_VAL(x)        ((0x3 & (x)) << 2)

#define U3P_U3_PHYA_REG1        0x004
#define P3A_RG_CLKDRV_AMP               GENMASK(31, 29)
#define P3A_RG_CLKDRV_AMP_VAL(x)        ((0x7 & (x)) << 29)

#define U3P_U3_PHYA_REG6        0x018
#define P3A_RG_TX_EIDLE_CM              GENMASK(31, 28)
#define P3A_RG_TX_EIDLE_CM_VAL(x)       ((0xf & (x)) << 28)

#define U3P_U3_PHYA_REG9        0x024
#define P3A_RG_RX_DAC_MUX               GENMASK(5, 1)
#define P3A_RG_RX_DAC_MUX_VAL(x)        ((0x1f & (x)) << 1)

#define U3P_U3_PHYA_DA_REG0     0x100
#define P3A_RG_XTAL_EXT_PE2H            GENMASK(17, 16)
#define P3A_RG_XTAL_EXT_PE2H_VAL(x)     ((0x3 & (x)) << 16)
#define P3A_RG_XTAL_EXT_PE1H            GENMASK(13, 12)
#define P3A_RG_XTAL_EXT_PE1H_VAL(x)     ((0x3 & (x)) << 12)
#define P3A_RG_XTAL_EXT_EN_U3           GENMASK(11, 10)
#define P3A_RG_XTAL_EXT_EN_U3_VAL(x)    ((0x3 & (x)) << 10)

#define U3P_U3_PHYA_DA_REG4     0x108
#define P3A_RG_PLL_DIVEN_PE2H           GENMASK(21, 19)
#define P3A_RG_PLL_BC_PE2H              GENMASK(7, 6)
#define P3A_RG_PLL_BC_PE2H_VAL(x)       ((0x3 & (x)) << 6)

#define U3P_U3_PHYA_DA_REG5     0x10c
#define P3A_RG_PLL_BR_PE2H              GENMASK(29, 28)
#define P3A_RG_PLL_BR_PE2H_VAL(x)       ((0x3 & (x)) << 28)
#define P3A_RG_PLL_IC_PE2H              GENMASK(15, 12)
#define P3A_RG_PLL_IC_PE2H_VAL(x)       ((0xf & (x)) << 12)

#define U3P_U3_PHYA_DA_REG6     0x110
#define P3A_RG_PLL_IR_PE2H              GENMASK(19, 16)
#define P3A_RG_PLL_IR_PE2H_VAL(x)       ((0xf & (x)) << 16)

#define U3P_U3_PHYA_DA_REG7     0x114
#define P3A_RG_PLL_BP_PE2H              GENMASK(19, 16)
#define P3A_RG_PLL_BP_PE2H_VAL(x)       ((0xf & (x)) << 16)

#define U3P_U3_PHYA_DA_REG20    0x13c
#define P3A_RG_PLL_DELTA1_PE2H          GENMASK(31, 16)
#define P3A_RG_PLL_DELTA1_PE2H_VAL(x)   ((0xffff & (x)) << 16)

#define U3P_U3_PHYA_DA_REG25    0x148
#define P3A_RG_PLL_DELTA_PE2H           GENMASK(15, 0)
#define P3A_RG_PLL_DELTA_PE2H_VAL(x)    (0xffff & (x))

#define U3P_U3_PHYD_LFPS1               0x00c
#define P3D_RG_FWAKE_TH         GENMASK(21, 16)
#define P3D_RG_FWAKE_TH_VAL(x)  ((0x3f & (x)) << 16)

#define U3P_U3_PHYD_CDR1                0x05c
#define P3D_RG_CDR_BIR_LTD1             GENMASK(28, 24)
#define P3D_RG_CDR_BIR_LTD1_VAL(x)      ((0x1f & (x)) << 24)
#define P3D_RG_CDR_BIR_LTD0             GENMASK(12, 8)
#define P3D_RG_CDR_BIR_LTD0_VAL(x)      ((0x1f & (x)) << 8)

#define U3P_U3_PHYD_RXDET1              0x128
#define P3D_RG_RXDET_STB2_SET           GENMASK(17, 9)
#define P3D_RG_RXDET_STB2_SET_VAL(x)    ((0x1ff & (x)) << 9)

#define U3P_U3_PHYD_RXDET2              0x12c
#define P3D_RG_RXDET_STB2_SET_P3        GENMASK(8, 0)
#define P3D_RG_RXDET_STB2_SET_P3_VAL(x) (0x1ff & (x))

#define U3P_SPLLC_XTALCTL3              0x018
#define XC3_RG_U3_XTAL_RX_PWD           BIT(9)
#define XC3_RG_U3_FRC_XTAL_RX_PWD       BIT(8)

#define U3P_U2FREQ_FMCR0        0x00
#define P2F_RG_MONCLK_SEL       GENMASK(27, 26)
#define P2F_RG_MONCLK_SEL_VAL(x)        ((0x3 & (x)) << 26)
#define P2F_RG_FREQDET_EN       BIT(24)
#define P2F_RG_CYCLECNT         GENMASK(23, 0)
#define P2F_RG_CYCLECNT_VAL(x)  ((P2F_RG_CYCLECNT) & (x))

#define U3P_U2FREQ_VALUE        0x0c

#define U3P_U2FREQ_FMMONR1      0x10
#define P2F_USB_FM_VALID        BIT(0)
#define P2F_RG_FRCK_EN          BIT(8)

#define U3P_REF_CLK             26      /* MHZ */
#define U3P_SLEW_RATE_COEF      28
#define U3P_SR_COEF_DIVISOR     1000
#define U3P_FM_DET_CYCLE_CNT    1024

/* SATA register setting */
#define PHYD_CTRL_SIGNAL_MODE4          0x1c
/* CDR Charge Pump P-path current adjustment */
#define RG_CDR_BICLTD1_GEN1_MSK         GENMASK(23, 20)
#define RG_CDR_BICLTD1_GEN1_VAL(x)      ((0xf & (x)) << 20)
#define RG_CDR_BICLTD0_GEN1_MSK         GENMASK(11, 8)
#define RG_CDR_BICLTD0_GEN1_VAL(x)      ((0xf & (x)) << 8)

#define PHYD_DESIGN_OPTION2             0x24
/* Symbol lock count selection */
#define RG_LOCK_CNT_SEL_MSK             GENMASK(5, 4)
#define RG_LOCK_CNT_SEL_VAL(x)          ((0x3 & (x)) << 4)

#define PHYD_DESIGN_OPTION9     0x40
/* COMWAK GAP width window */
#define RG_TG_MAX_MSK           GENMASK(20, 16)
#define RG_TG_MAX_VAL(x)        ((0x1f & (x)) << 16)
/* COMINIT GAP width window */
#define RG_T2_MAX_MSK           GENMASK(13, 8)
#define RG_T2_MAX_VAL(x)        ((0x3f & (x)) << 8)
/* COMWAK GAP width window */
#define RG_TG_MIN_MSK           GENMASK(7, 5)
#define RG_TG_MIN_VAL(x)        ((0x7 & (x)) << 5)
/* COMINIT GAP width window */
#define RG_T2_MIN_MSK           GENMASK(4, 0)
#define RG_T2_MIN_VAL(x)        (0x1f & (x))

#define ANA_RG_CTRL_SIGNAL1             0x4c
/* TX driver tail current control for 0dB de-empahsis mdoe for Gen1 speed */
#define RG_IDRV_0DB_GEN1_MSK            GENMASK(13, 8)
#define RG_IDRV_0DB_GEN1_VAL(x)         ((0x3f & (x)) << 8)

#define ANA_RG_CTRL_SIGNAL4             0x58
#define RG_CDR_BICLTR_GEN1_MSK          GENMASK(23, 20)
#define RG_CDR_BICLTR_GEN1_VAL(x)       ((0xf & (x)) << 20)
/* Loop filter R1 resistance adjustment for Gen1 speed */
#define RG_CDR_BR_GEN2_MSK              GENMASK(10, 8)
#define RG_CDR_BR_GEN2_VAL(x)           ((0x7 & (x)) << 8)

#define ANA_RG_CTRL_SIGNAL6             0x60
/* I-path capacitance adjustment for Gen1 */
#define RG_CDR_BC_GEN1_MSK              GENMASK(28, 24)
#define RG_CDR_BC_GEN1_VAL(x)           ((0x1f & (x)) << 24)
#define RG_CDR_BIRLTR_GEN1_MSK          GENMASK(4, 0)
#define RG_CDR_BIRLTR_GEN1_VAL(x)       (0x1f & (x))

#define ANA_EQ_EYE_CTRL_SIGNAL1         0x6c
/* RX Gen1 LEQ tuning step */
#define RG_EQ_DLEQ_LFI_GEN1_MSK         GENMASK(11, 8)
#define RG_EQ_DLEQ_LFI_GEN1_VAL(x)      ((0xf & (x)) << 8)

#define ANA_EQ_EYE_CTRL_SIGNAL4         0xd8
#define RG_CDR_BIRLTD0_GEN1_MSK         GENMASK(20, 16)
#define RG_CDR_BIRLTD0_GEN1_VAL(x)      ((0x1f & (x)) << 16)

#define ANA_EQ_EYE_CTRL_SIGNAL5         0xdc
#define RG_CDR_BIRLTD0_GEN3_MSK         GENMASK(4, 0)
#define RG_CDR_BIRLTD0_GEN3_VAL(x)      (0x1f & (x))

enum mtk_phy_version {
        MTK_PHY_V1 = 1,
        MTK_PHY_V2,
};

struct mtk_phy_pdata {
        /* avoid RX sensitivity level degradation only for mt8173 */
        bool avoid_rx_sen_degradation;
        enum mtk_phy_version version;
};

struct u2phy_banks {
        void __iomem *misc;
        void __iomem *fmreg;
        void __iomem *com;
};

struct u3phy_banks {
        void __iomem *spllc;
        void __iomem *chip;
        void __iomem *phyd; /* include u3phyd_bank2 */
        void __iomem *phya; /* include u3phya_da */
};

struct mtk_phy_instance {
        struct phy *phy;
        void __iomem *port_base;
        union {
                struct u2phy_banks u2_banks;
                struct u3phy_banks u3_banks;
        };
        struct clk *ref_clk;    /* reference clock of anolog phy */
        u32 index;
        u8 type;
        int eye_src;
        int eye_vrt;
        int eye_term;
        bool bc12_en;
};

struct mtk_tphy {
        struct device *dev;
        void __iomem *sif_base; /* only shared sif */
        /* deprecated, use @ref_clk instead in phy instance */
        struct clk *u3phya_ref; /* reference clock of usb3 anolog phy */
        const struct mtk_phy_pdata *pdata;
        struct mtk_phy_instance **phys;
        int nphys;
        int src_ref_clk; /* MHZ, reference clock for slew rate calibrate */
        int src_coef; /* coefficient for slew rate calibrate */
};

static void hs_slew_rate_calibrate(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        void __iomem *fmreg = u2_banks->fmreg;
        void __iomem *com = u2_banks->com;
        int calibration_val;
        int fm_out;
        u32 tmp;

        /* use force value */
        if (instance->eye_src)
                return;

        /* enable USB ring oscillator */
        tmp = readl(com + U3P_USBPHYACR5);
        tmp |= PA5_RG_U2_HSTX_SRCAL_EN;
        writel(tmp, com + U3P_USBPHYACR5);
        udelay(1);

        /*enable free run clock */
        tmp = readl(fmreg + U3P_U2FREQ_FMMONR1);
        tmp |= P2F_RG_FRCK_EN;
        writel(tmp, fmreg + U3P_U2FREQ_FMMONR1);

        /* set cycle count as 1024, and select u2 channel */
        tmp = readl(fmreg + U3P_U2FREQ_FMCR0);
        tmp &= ~(P2F_RG_CYCLECNT | P2F_RG_MONCLK_SEL);
        tmp |= P2F_RG_CYCLECNT_VAL(U3P_FM_DET_CYCLE_CNT);
        if (tphy->pdata->version == MTK_PHY_V1)
                tmp |= P2F_RG_MONCLK_SEL_VAL(instance->index >> 1);

        writel(tmp, fmreg + U3P_U2FREQ_FMCR0);

        /* enable frequency meter */
        tmp = readl(fmreg + U3P_U2FREQ_FMCR0);
        tmp |= P2F_RG_FREQDET_EN;
        writel(tmp, fmreg + U3P_U2FREQ_FMCR0);

        /* ignore return value */
        readl_poll_timeout(fmreg + U3P_U2FREQ_FMMONR1, tmp,
                           (tmp & P2F_USB_FM_VALID), 10, 200);

        fm_out = readl(fmreg + U3P_U2FREQ_VALUE);

        /* disable frequency meter */
        tmp = readl(fmreg + U3P_U2FREQ_FMCR0);
        tmp &= ~P2F_RG_FREQDET_EN;
        writel(tmp, fmreg + U3P_U2FREQ_FMCR0);

        /*disable free run clock */
        tmp = readl(fmreg + U3P_U2FREQ_FMMONR1);
        tmp &= ~P2F_RG_FRCK_EN;
        writel(tmp, fmreg + U3P_U2FREQ_FMMONR1);

        if (fm_out) {
                /* ( 1024 / FM_OUT ) x reference clock frequency x coef */
                tmp = tphy->src_ref_clk * tphy->src_coef;
                tmp = (tmp * U3P_FM_DET_CYCLE_CNT) / fm_out;
                calibration_val = DIV_ROUND_CLOSEST(tmp, U3P_SR_COEF_DIVISOR);
        } else {
                /* if FM detection fail, set default value */
                calibration_val = 4;
        }
        dev_dbg(tphy->dev, "phy:%d, fm_out:%d, calib:%d (clk:%d, coef:%d)\n",
                instance->index, fm_out, calibration_val,
                tphy->src_ref_clk, tphy->src_coef);

        /* set HS slew rate */
        tmp = readl(com + U3P_USBPHYACR5);
        tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
        tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(calibration_val);
        writel(tmp, com + U3P_USBPHYACR5);

        /* disable USB ring oscillator */
        tmp = readl(com + U3P_USBPHYACR5);
        tmp &= ~PA5_RG_U2_HSTX_SRCAL_EN;
        writel(tmp, com + U3P_USBPHYACR5);
}

static void u3_phy_instance_init(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u3phy_banks *u3_banks = &instance->u3_banks;
        u32 tmp;

        /* gating PCIe Analog XTAL clock */
        tmp = readl(u3_banks->spllc + U3P_SPLLC_XTALCTL3);
        tmp |= XC3_RG_U3_XTAL_RX_PWD | XC3_RG_U3_FRC_XTAL_RX_PWD;
        writel(tmp, u3_banks->spllc + U3P_SPLLC_XTALCTL3);

        /* gating XSQ */
        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG0);
        tmp &= ~P3A_RG_XTAL_EXT_EN_U3;
        tmp |= P3A_RG_XTAL_EXT_EN_U3_VAL(2);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG0);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG9);
        tmp &= ~P3A_RG_RX_DAC_MUX;
        tmp |= P3A_RG_RX_DAC_MUX_VAL(4);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_REG9);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG6);
        tmp &= ~P3A_RG_TX_EIDLE_CM;
        tmp |= P3A_RG_TX_EIDLE_CM_VAL(0xe);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_REG6);

        tmp = readl(u3_banks->phyd + U3P_U3_PHYD_CDR1);
        tmp &= ~(P3D_RG_CDR_BIR_LTD0 | P3D_RG_CDR_BIR_LTD1);
        tmp |= P3D_RG_CDR_BIR_LTD0_VAL(0xc) | P3D_RG_CDR_BIR_LTD1_VAL(0x3);
        writel(tmp, u3_banks->phyd + U3P_U3_PHYD_CDR1);

        tmp = readl(u3_banks->phyd + U3P_U3_PHYD_LFPS1);
        tmp &= ~P3D_RG_FWAKE_TH;
        tmp |= P3D_RG_FWAKE_TH_VAL(0x34);
        writel(tmp, u3_banks->phyd + U3P_U3_PHYD_LFPS1);

        tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RXDET1);
        tmp &= ~P3D_RG_RXDET_STB2_SET;
        tmp |= P3D_RG_RXDET_STB2_SET_VAL(0x10);
        writel(tmp, u3_banks->phyd + U3P_U3_PHYD_RXDET1);

        tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RXDET2);
        tmp &= ~P3D_RG_RXDET_STB2_SET_P3;
        tmp |= P3D_RG_RXDET_STB2_SET_P3_VAL(0x10);
        writel(tmp, u3_banks->phyd + U3P_U3_PHYD_RXDET2);

        dev_dbg(tphy->dev, "%s(%d)\n", __func__, instance->index);
}

static void u2_phy_instance_init(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        void __iomem *com = u2_banks->com;
        u32 index = instance->index;
        u32 tmp;

        /* switch to USB function, and enable usb pll */
        tmp = readl(com + U3P_U2PHYDTM0);
        tmp &= ~(P2C_FORCE_UART_EN | P2C_FORCE_SUSPENDM);
        tmp |= P2C_RG_XCVRSEL_VAL(1) | P2C_RG_DATAIN_VAL(0);
        writel(tmp, com + U3P_U2PHYDTM0);

        tmp = readl(com + U3P_U2PHYDTM1);
        tmp &= ~P2C_RG_UART_EN;
        writel(tmp, com + U3P_U2PHYDTM1);

        tmp = readl(com + U3P_USBPHYACR0);
        tmp |= PA0_RG_USB20_INTR_EN;
        writel(tmp, com + U3P_USBPHYACR0);

        /* disable switch 100uA current to SSUSB */
        tmp = readl(com + U3P_USBPHYACR5);
        tmp &= ~PA5_RG_U2_HS_100U_U3_EN;
        writel(tmp, com + U3P_USBPHYACR5);

        if (!index) {
                tmp = readl(com + U3P_U2PHYACR4);
                tmp &= ~P2C_U2_GPIO_CTR_MSK;
                writel(tmp, com + U3P_U2PHYACR4);
        }

        if (tphy->pdata->avoid_rx_sen_degradation) {
                if (!index) {
                        tmp = readl(com + U3P_USBPHYACR2);
                        tmp |= PA2_RG_SIF_U2PLL_FORCE_EN;
                        writel(tmp, com + U3P_USBPHYACR2);

                        tmp = readl(com + U3D_U2PHYDCR0);
                        tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
                        writel(tmp, com + U3D_U2PHYDCR0);
                } else {
                        tmp = readl(com + U3D_U2PHYDCR0);
                        tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
                        writel(tmp, com + U3D_U2PHYDCR0);

                        tmp = readl(com + U3P_U2PHYDTM0);
                        tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
                        writel(tmp, com + U3P_U2PHYDTM0);
                }
        }

        tmp = readl(com + U3P_USBPHYACR6);
        tmp &= ~PA6_RG_U2_BC11_SW_EN;   /* DP/DM BC1.1 path Disable */
        tmp &= ~PA6_RG_U2_SQTH;
        tmp |= PA6_RG_U2_SQTH_VAL(2);
        writel(tmp, com + U3P_USBPHYACR6);

        dev_dbg(tphy->dev, "%s(%d)\n", __func__, index);
}

static void u2_phy_instance_power_on(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        void __iomem *com = u2_banks->com;
        u32 index = instance->index;
        u32 tmp;

        tmp = readl(com + U3P_U2PHYDTM0);
        tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
        writel(tmp, com + U3P_U2PHYDTM0);

        /* OTG Enable */
        tmp = readl(com + U3P_USBPHYACR6);
        tmp |= PA6_RG_U2_OTG_VBUSCMP_EN;
        writel(tmp, com + U3P_USBPHYACR6);

        tmp = readl(com + U3P_U2PHYDTM1);
        tmp |= P2C_RG_VBUSVALID | P2C_RG_AVALID;
        tmp &= ~P2C_RG_SESSEND;
        writel(tmp, com + U3P_U2PHYDTM1);

        if (tphy->pdata->avoid_rx_sen_degradation && index) {
                tmp = readl(com + U3D_U2PHYDCR0);
                tmp |= P2C_RG_SIF_U2PLL_FORCE_ON;
                writel(tmp, com + U3D_U2PHYDCR0);

                tmp = readl(com + U3P_U2PHYDTM0);
                tmp |= P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM;
                writel(tmp, com + U3P_U2PHYDTM0);
        }
        dev_dbg(tphy->dev, "%s(%d)\n", __func__, index);
}

static void u2_phy_instance_power_off(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        void __iomem *com = u2_banks->com;
        u32 index = instance->index;
        u32 tmp;

        tmp = readl(com + U3P_U2PHYDTM0);
        tmp &= ~(P2C_RG_XCVRSEL | P2C_RG_DATAIN);
        writel(tmp, com + U3P_U2PHYDTM0);

        /* OTG Disable */
        tmp = readl(com + U3P_USBPHYACR6);
        tmp &= ~PA6_RG_U2_OTG_VBUSCMP_EN;
        writel(tmp, com + U3P_USBPHYACR6);

        tmp = readl(com + U3P_U2PHYDTM1);
        tmp &= ~(P2C_RG_VBUSVALID | P2C_RG_AVALID);
        tmp |= P2C_RG_SESSEND;
        writel(tmp, com + U3P_U2PHYDTM1);

        if (tphy->pdata->avoid_rx_sen_degradation && index) {
                tmp = readl(com + U3P_U2PHYDTM0);
                tmp &= ~(P2C_RG_SUSPENDM | P2C_FORCE_SUSPENDM);
                writel(tmp, com + U3P_U2PHYDTM0);

                tmp = readl(com + U3D_U2PHYDCR0);
                tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
                writel(tmp, com + U3D_U2PHYDCR0);
        }

        dev_dbg(tphy->dev, "%s(%d)\n", __func__, index);
}

static void u2_phy_instance_exit(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        void __iomem *com = u2_banks->com;
        u32 index = instance->index;
        u32 tmp;

        if (tphy->pdata->avoid_rx_sen_degradation && index) {
                tmp = readl(com + U3D_U2PHYDCR0);
                tmp &= ~P2C_RG_SIF_U2PLL_FORCE_ON;
                writel(tmp, com + U3D_U2PHYDCR0);

                tmp = readl(com + U3P_U2PHYDTM0);
                tmp &= ~P2C_FORCE_SUSPENDM;
                writel(tmp, com + U3P_U2PHYDTM0);
        }
}

static void u2_phy_instance_set_mode(struct mtk_tphy *tphy,
                                     struct mtk_phy_instance *instance,
                                     enum phy_mode mode)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        u32 tmp;

        tmp = readl(u2_banks->com + U3P_U2PHYDTM1);
        switch (mode) {
        case PHY_MODE_USB_DEVICE:
                tmp |= P2C_FORCE_IDDIG | P2C_RG_IDDIG;
                break;
        case PHY_MODE_USB_HOST:
                tmp |= P2C_FORCE_IDDIG;
                tmp &= ~P2C_RG_IDDIG;
                break;
        case PHY_MODE_USB_OTG:
                tmp &= ~(P2C_FORCE_IDDIG | P2C_RG_IDDIG);
                break;
        default:
                return;
        }
        writel(tmp, u2_banks->com + U3P_U2PHYDTM1);
}

static void pcie_phy_instance_init(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u3phy_banks *u3_banks = &instance->u3_banks;
        u32 tmp;

        if (tphy->pdata->version != MTK_PHY_V1)
                return;

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG0);
        tmp &= ~(P3A_RG_XTAL_EXT_PE1H | P3A_RG_XTAL_EXT_PE2H);
        tmp |= P3A_RG_XTAL_EXT_PE1H_VAL(0x2) | P3A_RG_XTAL_EXT_PE2H_VAL(0x2);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG0);

        /* ref clk drive */
        tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG1);
        tmp &= ~P3A_RG_CLKDRV_AMP;
        tmp |= P3A_RG_CLKDRV_AMP_VAL(0x4);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_REG1);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_REG0);
        tmp &= ~P3A_RG_CLKDRV_OFF;
        tmp |= P3A_RG_CLKDRV_OFF_VAL(0x1);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_REG0);

        /* SSC delta -5000ppm */
        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG20);
        tmp &= ~P3A_RG_PLL_DELTA1_PE2H;
        tmp |= P3A_RG_PLL_DELTA1_PE2H_VAL(0x3c);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG20);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG25);
        tmp &= ~P3A_RG_PLL_DELTA_PE2H;
        tmp |= P3A_RG_PLL_DELTA_PE2H_VAL(0x36);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG25);

        /* change pll BW 0.6M */
        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG5);
        tmp &= ~(P3A_RG_PLL_BR_PE2H | P3A_RG_PLL_IC_PE2H);
        tmp |= P3A_RG_PLL_BR_PE2H_VAL(0x1) | P3A_RG_PLL_IC_PE2H_VAL(0x1);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG5);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG4);
        tmp &= ~(P3A_RG_PLL_DIVEN_PE2H | P3A_RG_PLL_BC_PE2H);
        tmp |= P3A_RG_PLL_BC_PE2H_VAL(0x3);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG4);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG6);
        tmp &= ~P3A_RG_PLL_IR_PE2H;
        tmp |= P3A_RG_PLL_IR_PE2H_VAL(0x2);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG6);

        tmp = readl(u3_banks->phya + U3P_U3_PHYA_DA_REG7);
        tmp &= ~P3A_RG_PLL_BP_PE2H;
        tmp |= P3A_RG_PLL_BP_PE2H_VAL(0xa);
        writel(tmp, u3_banks->phya + U3P_U3_PHYA_DA_REG7);

        /* Tx Detect Rx Timing: 10us -> 5us */
        tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RXDET1);
        tmp &= ~P3D_RG_RXDET_STB2_SET;
        tmp |= P3D_RG_RXDET_STB2_SET_VAL(0x10);
        writel(tmp, u3_banks->phyd + U3P_U3_PHYD_RXDET1);

        tmp = readl(u3_banks->phyd + U3P_U3_PHYD_RXDET2);
        tmp &= ~P3D_RG_RXDET_STB2_SET_P3;
        tmp |= P3D_RG_RXDET_STB2_SET_P3_VAL(0x10);
        writel(tmp, u3_banks->phyd + U3P_U3_PHYD_RXDET2);

        /* wait for PCIe subsys register to active */
        usleep_range(2500, 3000);
        dev_dbg(tphy->dev, "%s(%d)\n", __func__, instance->index);
}

static void pcie_phy_instance_power_on(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u3phy_banks *bank = &instance->u3_banks;
        u32 tmp;

        tmp = readl(bank->chip + U3P_U3_CHIP_GPIO_CTLD);
        tmp &= ~(P3C_FORCE_IP_SW_RST | P3C_REG_IP_SW_RST);
        writel(tmp, bank->chip + U3P_U3_CHIP_GPIO_CTLD);

        tmp = readl(bank->chip + U3P_U3_CHIP_GPIO_CTLE);
        tmp &= ~(P3C_RG_SWRST_U3_PHYD_FORCE_EN | P3C_RG_SWRST_U3_PHYD);
        writel(tmp, bank->chip + U3P_U3_CHIP_GPIO_CTLE);
}

static void pcie_phy_instance_power_off(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)

{
        struct u3phy_banks *bank = &instance->u3_banks;
        u32 tmp;

        tmp = readl(bank->chip + U3P_U3_CHIP_GPIO_CTLD);
        tmp |= P3C_FORCE_IP_SW_RST | P3C_REG_IP_SW_RST;
        writel(tmp, bank->chip + U3P_U3_CHIP_GPIO_CTLD);

        tmp = readl(bank->chip + U3P_U3_CHIP_GPIO_CTLE);
        tmp |= P3C_RG_SWRST_U3_PHYD_FORCE_EN | P3C_RG_SWRST_U3_PHYD;
        writel(tmp, bank->chip + U3P_U3_CHIP_GPIO_CTLE);
}

static void sata_phy_instance_init(struct mtk_tphy *tphy,
        struct mtk_phy_instance *instance)
{
        struct u3phy_banks *u3_banks = &instance->u3_banks;
        void __iomem *phyd = u3_banks->phyd;
        u32 tmp;

        /* charge current adjustment */
        tmp = readl(phyd + ANA_RG_CTRL_SIGNAL6);
        tmp &= ~(RG_CDR_BIRLTR_GEN1_MSK | RG_CDR_BC_GEN1_MSK);
        tmp |= RG_CDR_BIRLTR_GEN1_VAL(0x6) | RG_CDR_BC_GEN1_VAL(0x1a);
        writel(tmp, phyd + ANA_RG_CTRL_SIGNAL6);

        tmp = readl(phyd + ANA_EQ_EYE_CTRL_SIGNAL4);
        tmp &= ~RG_CDR_BIRLTD0_GEN1_MSK;
        tmp |= RG_CDR_BIRLTD0_GEN1_VAL(0x18);
        writel(tmp, phyd + ANA_EQ_EYE_CTRL_SIGNAL4);

        tmp = readl(phyd + ANA_EQ_EYE_CTRL_SIGNAL5);
        tmp &= ~RG_CDR_BIRLTD0_GEN3_MSK;
        tmp |= RG_CDR_BIRLTD0_GEN3_VAL(0x06);
        writel(tmp, phyd + ANA_EQ_EYE_CTRL_SIGNAL5);

        tmp = readl(phyd + ANA_RG_CTRL_SIGNAL4);
        tmp &= ~(RG_CDR_BICLTR_GEN1_MSK | RG_CDR_BR_GEN2_MSK);
        tmp |= RG_CDR_BICLTR_GEN1_VAL(0x0c) | RG_CDR_BR_GEN2_VAL(0x07);
        writel(tmp, phyd + ANA_RG_CTRL_SIGNAL4);

        tmp = readl(phyd + PHYD_CTRL_SIGNAL_MODE4);
        tmp &= ~(RG_CDR_BICLTD0_GEN1_MSK | RG_CDR_BICLTD1_GEN1_MSK);
        tmp |= RG_CDR_BICLTD0_GEN1_VAL(0x08) | RG_CDR_BICLTD1_GEN1_VAL(0x02);
        writel(tmp, phyd + PHYD_CTRL_SIGNAL_MODE4);

        tmp = readl(phyd + PHYD_DESIGN_OPTION2);
        tmp &= ~RG_LOCK_CNT_SEL_MSK;
        tmp |= RG_LOCK_CNT_SEL_VAL(0x02);
        writel(tmp, phyd + PHYD_DESIGN_OPTION2);

        tmp = readl(phyd + PHYD_DESIGN_OPTION9);
        tmp &= ~(RG_T2_MIN_MSK | RG_TG_MIN_MSK |
                 RG_T2_MAX_MSK | RG_TG_MAX_MSK);
        tmp |= RG_T2_MIN_VAL(0x12) | RG_TG_MIN_VAL(0x04) |
               RG_T2_MAX_VAL(0x31) | RG_TG_MAX_VAL(0x0e);
        writel(tmp, phyd + PHYD_DESIGN_OPTION9);

        tmp = readl(phyd + ANA_RG_CTRL_SIGNAL1);
        tmp &= ~RG_IDRV_0DB_GEN1_MSK;
        tmp |= RG_IDRV_0DB_GEN1_VAL(0x20);
        writel(tmp, phyd + ANA_RG_CTRL_SIGNAL1);

        tmp = readl(phyd + ANA_EQ_EYE_CTRL_SIGNAL1);
        tmp &= ~RG_EQ_DLEQ_LFI_GEN1_MSK;
        tmp |= RG_EQ_DLEQ_LFI_GEN1_VAL(0x03);
        writel(tmp, phyd + ANA_EQ_EYE_CTRL_SIGNAL1);

        dev_dbg(tphy->dev, "%s(%d)\n", __func__, instance->index);
}

static void phy_v1_banks_init(struct mtk_tphy *tphy,
                              struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        struct u3phy_banks *u3_banks = &instance->u3_banks;

        switch (instance->type) {
        case PHY_TYPE_USB2:
                u2_banks->misc = NULL;
                u2_banks->fmreg = tphy->sif_base + SSUSB_SIFSLV_V1_U2FREQ;
                u2_banks->com = instance->port_base + SSUSB_SIFSLV_V1_U2PHY_COM;
                break;
        case PHY_TYPE_USB3:
        case PHY_TYPE_PCIE:
                u3_banks->spllc = tphy->sif_base + SSUSB_SIFSLV_V1_SPLLC;
                u3_banks->chip = tphy->sif_base + SSUSB_SIFSLV_V1_CHIP;
                u3_banks->phyd = instance->port_base + SSUSB_SIFSLV_V1_U3PHYD;
                u3_banks->phya = instance->port_base + SSUSB_SIFSLV_V1_U3PHYA;
                break;
        case PHY_TYPE_SATA:
                u3_banks->phyd = instance->port_base + SSUSB_SIFSLV_V1_U3PHYD;
                break;
        default:
                dev_err(tphy->dev, "incompatible PHY type\n");
                return;
        }
}

static void phy_v2_banks_init(struct mtk_tphy *tphy,
                              struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        struct u3phy_banks *u3_banks = &instance->u3_banks;

        switch (instance->type) {
        case PHY_TYPE_USB2:
                u2_banks->misc = instance->port_base + SSUSB_SIFSLV_V2_MISC;
                u2_banks->fmreg = instance->port_base + SSUSB_SIFSLV_V2_U2FREQ;
                u2_banks->com = instance->port_base + SSUSB_SIFSLV_V2_U2PHY_COM;
                break;
        case PHY_TYPE_USB3:
        case PHY_TYPE_PCIE:
                u3_banks->spllc = instance->port_base + SSUSB_SIFSLV_V2_SPLLC;
                u3_banks->chip = instance->port_base + SSUSB_SIFSLV_V2_CHIP;
                u3_banks->phyd = instance->port_base + SSUSB_SIFSLV_V2_U3PHYD;
                u3_banks->phya = instance->port_base + SSUSB_SIFSLV_V2_U3PHYA;
                break;
        default:
                dev_err(tphy->dev, "incompatible PHY type\n");
                return;
        }
}

static void phy_parse_property(struct mtk_tphy *tphy,
                                struct mtk_phy_instance *instance)
{
        struct device *dev = &instance->phy->dev;

        if (instance->type != PHY_TYPE_USB2)
                return;

        instance->bc12_en = device_property_read_bool(dev, "mediatek,bc12");
        device_property_read_u32(dev, "mediatek,eye-src",
                                 &instance->eye_src);
        device_property_read_u32(dev, "mediatek,eye-vrt",
                                 &instance->eye_vrt);
        device_property_read_u32(dev, "mediatek,eye-term",
                                 &instance->eye_term);
        dev_dbg(dev, "bc12:%d, src:%d, vrt:%d, term:%d\n",
                instance->bc12_en, instance->eye_src,
                instance->eye_vrt, instance->eye_term);
}

static void u2_phy_props_set(struct mtk_tphy *tphy,
                             struct mtk_phy_instance *instance)
{
        struct u2phy_banks *u2_banks = &instance->u2_banks;
        void __iomem *com = u2_banks->com;
        u32 tmp;

        if (instance->bc12_en) {
                tmp = readl(com + U3P_U2PHYBC12C);
                tmp |= P2C_RG_CHGDT_EN; /* BC1.2 path Enable */
                writel(tmp, com + U3P_U2PHYBC12C);
        }

        if (instance->eye_src) {
                tmp = readl(com + U3P_USBPHYACR5);
                tmp &= ~PA5_RG_U2_HSTX_SRCTRL;
                tmp |= PA5_RG_U2_HSTX_SRCTRL_VAL(instance->eye_src);
                writel(tmp, com + U3P_USBPHYACR5);
        }

        if (instance->eye_vrt) {
                tmp = readl(com + U3P_USBPHYACR1);
                tmp &= ~PA1_RG_VRT_SEL;
                tmp |= PA1_RG_VRT_SEL_VAL(instance->eye_vrt);
                writel(tmp, com + U3P_USBPHYACR1);
        }

        if (instance->eye_term) {
                tmp = readl(com + U3P_USBPHYACR1);
                tmp &= ~PA1_RG_TERM_SEL;
                tmp |= PA1_RG_TERM_SEL_VAL(instance->eye_term);
                writel(tmp, com + U3P_USBPHYACR1);
        }
}

static int mtk_phy_init(struct phy *phy)
{
        struct mtk_phy_instance *instance = phy_get_drvdata(phy);
        struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);
        int ret;

        ret = clk_prepare_enable(tphy->u3phya_ref);
        if (ret) {
                dev_err(tphy->dev, "failed to enable u3phya_ref\n");
                return ret;
        }

        ret = clk_prepare_enable(instance->ref_clk);
        if (ret) {
                dev_err(tphy->dev, "failed to enable ref_clk\n");
                return ret;
        }

        switch (instance->type) {
        case PHY_TYPE_USB2:
                u2_phy_instance_init(tphy, instance);
                u2_phy_props_set(tphy, instance);
                break;
        case PHY_TYPE_USB3:
                u3_phy_instance_init(tphy, instance);
                break;
        case PHY_TYPE_PCIE:
                pcie_phy_instance_init(tphy, instance);
                break;
        case PHY_TYPE_SATA:
                sata_phy_instance_init(tphy, instance);
                break;
        default:
                dev_err(tphy->dev, "incompatible PHY type\n");
                return -EINVAL;
        }

        return 0;
}

static int mtk_phy_power_on(struct phy *phy)
{
        struct mtk_phy_instance *instance = phy_get_drvdata(phy);
        struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);

        if (instance->type == PHY_TYPE_USB2) {
                u2_phy_instance_power_on(tphy, instance);
                hs_slew_rate_calibrate(tphy, instance);
        } else if (instance->type == PHY_TYPE_PCIE) {
                pcie_phy_instance_power_on(tphy, instance);
        }

        return 0;
}

static int mtk_phy_power_off(struct phy *phy)
{
        struct mtk_phy_instance *instance = phy_get_drvdata(phy);
        struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);

        if (instance->type == PHY_TYPE_USB2)
                u2_phy_instance_power_off(tphy, instance);
        else if (instance->type == PHY_TYPE_PCIE)
                pcie_phy_instance_power_off(tphy, instance);

        return 0;
}

static int mtk_phy_exit(struct phy *phy)
{
        struct mtk_phy_instance *instance = phy_get_drvdata(phy);
        struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);

        if (instance->type == PHY_TYPE_USB2)
                u2_phy_instance_exit(tphy, instance);

        clk_disable_unprepare(instance->ref_clk);
        clk_disable_unprepare(tphy->u3phya_ref);
        return 0;
}

static int mtk_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode)
{
        struct mtk_phy_instance *instance = phy_get_drvdata(phy);
        struct mtk_tphy *tphy = dev_get_drvdata(phy->dev.parent);

        if (instance->type == PHY_TYPE_USB2)
                u2_phy_instance_set_mode(tphy, instance, mode);

        return 0;
}

static struct phy *mtk_phy_xlate(struct device *dev,
                                        struct of_phandle_args *args)
{
        struct mtk_tphy *tphy = dev_get_drvdata(dev);
        struct mtk_phy_instance *instance = NULL;
        struct device_node *phy_np = args->np;
        int index;

        if (args->args_count != 1) {
                dev_err(dev, "invalid number of cells in 'phy' property\n");
                return ERR_PTR(-EINVAL);
        }

        for (index = 0; index < tphy->nphys; index++)
                if (phy_np == tphy->phys[index]->phy->dev.of_node) {
                        instance = tphy->phys[index];

                        break;
                }

        if (!instance) {
                dev_err(dev, "failed to find appropriate phy\n");
                return ERR_PTR(-EINVAL);
        }

        instance->type = args->args[0];
        if (!(instance->type == PHY_TYPE_USB2 ||
              instance->type == PHY_TYPE_USB3 ||
              instance->type == PHY_TYPE_PCIE ||
              instance->type == PHY_TYPE_SATA)) {
                dev_err(dev, "unsupported device type: %d\n", instance->type);
                return ERR_PTR(-EINVAL);
        }

        if (tphy->pdata->version == MTK_PHY_V1) {
                phy_v1_banks_init(tphy, instance);
        } else if (tphy->pdata->version == MTK_PHY_V2) {
                phy_v2_banks_init(tphy, instance);
        } else {
                dev_err(dev, "phy version is not supported\n");
                return ERR_PTR(-EINVAL);
        }

        phy_parse_property(tphy, instance);

        return instance->phy;
}

static const struct phy_ops mtk_tphy_ops = {
        .init           = mtk_phy_init,
        .exit           = mtk_phy_exit,
        .power_on       = mtk_phy_power_on,
        .power_off      = mtk_phy_power_off,
        .set_mode       = mtk_phy_set_mode,
        .owner          = THIS_MODULE,
};

static const struct mtk_phy_pdata tphy_v1_pdata = {
        .avoid_rx_sen_degradation = false,
        .version = MTK_PHY_V1,
};

static const struct mtk_phy_pdata tphy_v2_pdata = {
        .avoid_rx_sen_degradation = false,
        .version = MTK_PHY_V2,
};

static const struct mtk_phy_pdata mt8173_pdata = {
        .avoid_rx_sen_degradation = true,
        .version = MTK_PHY_V1,
};

static const struct of_device_id mtk_tphy_id_table[] = {
        { .compatible = "mediatek,mt2701-u3phy", .data = &tphy_v1_pdata },
        { .compatible = "mediatek,mt2712-u3phy", .data = &tphy_v2_pdata },
        { .compatible = "mediatek,mt8173-u3phy", .data = &mt8173_pdata },
        { .compatible = "mediatek,generic-tphy-v1", .data = &tphy_v1_pdata },
        { .compatible = "mediatek,generic-tphy-v2", .data = &tphy_v2_pdata },
        { },
};
MODULE_DEVICE_TABLE(of, mtk_tphy_id_table);

static int mtk_tphy_probe(struct platform_device *pdev)
{
        struct device *dev = &pdev->dev;
        struct device_node *np = dev->of_node;
        struct device_node *child_np;
        struct phy_provider *provider;
        struct resource *sif_res;
        struct mtk_tphy *tphy;
        struct resource res;
        int port, retval;

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

        tphy->pdata = of_device_get_match_data(dev);
        if (!tphy->pdata)
                return -EINVAL;

        tphy->nphys = of_get_child_count(np);
        tphy->phys = devm_kcalloc(dev, tphy->nphys,
                                       sizeof(*tphy->phys), GFP_KERNEL);
        if (!tphy->phys)
                return -ENOMEM;

        tphy->dev = dev;
        platform_set_drvdata(pdev, tphy);

        sif_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        /* SATA phy of V1 needn't it if not shared with PCIe or USB */
        if (sif_res && tphy->pdata->version == MTK_PHY_V1) {
                /* get banks shared by multiple phys */
                tphy->sif_base = devm_ioremap_resource(dev, sif_res);
                if (IS_ERR(tphy->sif_base)) {
                        dev_err(dev, "failed to remap sif regs\n");
                        return PTR_ERR(tphy->sif_base);
                }
        }

        /* it's deprecated, make it optional for backward compatibility */
        tphy->u3phya_ref = devm_clk_get_optional(dev, "u3phya_ref");
        if (IS_ERR(tphy->u3phya_ref))
                return PTR_ERR(tphy->u3phya_ref);

        tphy->src_ref_clk = U3P_REF_CLK;
        tphy->src_coef = U3P_SLEW_RATE_COEF;
        /* update parameters of slew rate calibrate if exist */
        device_property_read_u32(dev, "mediatek,src-ref-clk-mhz",
                &tphy->src_ref_clk);
        device_property_read_u32(dev, "mediatek,src-coef", &tphy->src_coef);

        port = 0;
        for_each_child_of_node(np, child_np) {
                struct mtk_phy_instance *instance;
                struct phy *phy;

                instance = devm_kzalloc(dev, sizeof(*instance), GFP_KERNEL);
                if (!instance) {
                        retval = -ENOMEM;
                        goto put_child;
                }

                tphy->phys[port] = instance;

                phy = devm_phy_create(dev, child_np, &mtk_tphy_ops);
                if (IS_ERR(phy)) {
                        dev_err(dev, "failed to create phy\n");
                        retval = PTR_ERR(phy);
                        goto put_child;
                }

                retval = of_address_to_resource(child_np, 0, &res);
                if (retval) {
                        dev_err(dev, "failed to get address resource(id-%d)\n",
                                port);
                        goto put_child;
                }

                instance->port_base = devm_ioremap_resource(&phy->dev, &res);
                if (IS_ERR(instance->port_base)) {
                        dev_err(dev, "failed to remap phy regs\n");
                        retval = PTR_ERR(instance->port_base);
                        goto put_child;
                }

                instance->phy = phy;
                instance->index = port;
                phy_set_drvdata(phy, instance);
                port++;

                /* if deprecated clock is provided, ignore instance's one */
                if (tphy->u3phya_ref)
                        continue;

                instance->ref_clk = devm_clk_get(&phy->dev, "ref");
                if (IS_ERR(instance->ref_clk)) {
                        dev_err(dev, "failed to get ref_clk(id-%d)\n", port);
                        retval = PTR_ERR(instance->ref_clk);
                        goto put_child;
                }
        }

        provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);

        return PTR_ERR_OR_ZERO(provider);
put_child:
        of_node_put(child_np);
        return retval;
}

static struct platform_driver mtk_tphy_driver = {
        .probe          = mtk_tphy_probe,
        .driver         = {
                .name   = "mtk-tphy",
                .of_match_table = mtk_tphy_id_table,
        },
};

module_platform_driver(mtk_tphy_driver);

MODULE_AUTHOR("Chunfeng Yun <chunfeng.yun@mediatek.com>");
MODULE_DESCRIPTION("MediaTek T-PHY driver");
MODULE_LICENSE("GPL v2");