/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * Copyright 2022 Google, Inc
 *
 * MAXIM TCPC header file.
 */
#ifndef TCPCI_MAXIM_H_
#define TCPCI_MAXIM_H_

#define VENDOR_CC_STATUS2                       0x85
#define CC1_VUFP_RD0P5                          BIT(1)
#define CC2_VUFP_RD0P5                          BIT(5)
#define TCPC_VENDOR_FLADC_STATUS                0x89

#define TCPC_VENDOR_CC_CTRL1                    0x8c
#define CCCONNDRY                               BIT(7)
#define CCCOMPEN                                BIT(5)

#define TCPC_VENDOR_CC_CTRL2                    0x8d
#define SBUOVPDIS                               BIT(7)
#define CCOVPDIS                                BIT(6)
#define SBURPCTRL                               BIT(5)
#define CCLPMODESEL                             GENMASK(4, 3)
#define LOW_POWER_MODE_DISABLE                  0
#define ULTRA_LOW_POWER_MODE                    1
#define CCRPCTRL                                GENMASK(2, 0)
#define UA_1_SRC                                1
#define UA_80_SRC                               3

#define TCPC_VENDOR_CC_CTRL3                    0x8e
#define CCWTRDEB                                GENMASK(7, 6)
#define CCWTRDEB_1MS                            1
#define CCWTRSEL                                GENMASK(5, 3)
#define CCWTRSEL_1V                             0x4
#define CCLADDERDIS                             BIT(2)
#define WTRCYCLE                                GENMASK(0, 0)
#define WTRCYCLE_2_4_S                          0
#define WTRCYCLE_4_8_S                          1

#define TCPC_VENDOR_ADC_CTRL1                   0x91
#define ADCINSEL                                GENMASK(7, 5)
#define ADCEN                                   BIT(0)

enum contamiant_state {
        NOT_DETECTED,
        DETECTED,
        SINK,
};

/*
 * @potential_contaminant:
 *              Last returned result to tcpm indicating whether the TCPM port
 *              has potential contaminant.
 */
struct max_tcpci_chip {
        struct tcpci_data data;
        struct tcpci *tcpci;
        struct device *dev;
        struct i2c_client *client;
        struct tcpm_port *port;
        enum contamiant_state contaminant_state;
        bool veto_vconn_swap;
};

static inline int max_tcpci_read16(struct max_tcpci_chip *chip, unsigned int reg, u16 *val)
{
        return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u16));
}

static inline int max_tcpci_write16(struct max_tcpci_chip *chip, unsigned int reg, u16 val)
{
        return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u16));
}

static inline int max_tcpci_read8(struct max_tcpci_chip *chip, unsigned int reg, u8 *val)
{
        return regmap_raw_read(chip->data.regmap, reg, val, sizeof(u8));
}

static inline int max_tcpci_write8(struct max_tcpci_chip *chip, unsigned int reg, u8 val)
{
        return regmap_raw_write(chip->data.regmap, reg, &val, sizeof(u8));
}

/**
 * max_contaminant_is_contaminant - Test if CC was toggled due to contaminant
 *
 * @chip: Handle to a struct max_tcpci_chip
 * @disconnect_while_debounce: Whether the disconnect was detected when CC
 *                             pins were debouncing
 * @cc_handled: Returns whether or not update to CC status was handled here
 *
 * Determine if a contaminant was detected.
 *
 * Returns: true if a contaminant was detected, false otherwise. cc_handled
 * is updated to reflect whether or not further CC handling is required.
 */
bool max_contaminant_is_contaminant(struct max_tcpci_chip *chip, bool disconnect_while_debounce,
                                    bool *cc_handled);

#endif  // TCPCI_MAXIM_H_