#include <stdlib.h>
#include <stdint.h>

#include "platform.h"
#include "fxl6408.h"

#define FXL6408_ADDR0             0x44
#define FXL6408_ADDR1             0x43

int fxl6408_reg_read(uint8_t chip_id, uint8_t reg, uint8_t *data) {
    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
    int rv;

    rv = drv_i2c_read8(addr, reg, data, 1);
    return rv;
}

int fxl6408_reg_write(uint8_t chip_id, uint8_t reg, uint8_t data) {
    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
    int rv;

    rv = drv_i2c_write8(addr, reg, &data, 1);
    return rv;
}

int fxl6408_get_pin(uint8_t chip_id, uint8_t reg, uint8_t pin, uint8_t *val) {
    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
    int rv;

    if (reg == FXL6408_REG_ID_CTRL) return DRV_ERR;

    rv = drv_i2c_read8(addr, reg, val, 1);
    if (rv) return rv;

    *val = *val >> pin;
    *val &= 0x01;

    return DRV_OK;
}

int fxl6408_set_pin(uint8_t chip_id, uint8_t reg, uint8_t pin, uint8_t val) {
    uint8_t addr = chip_id ? FXL6408_ADDR1 : FXL6408_ADDR0;
    uint8_t data;
    int rv;

    if ((reg == FXL6408_REG_ID_CTRL) || (reg == FXL6408_REG_I_STATE)) return DRV_ERR;

    rv = drv_i2c_read8(addr, reg, &data, 1);
    if (rv) return rv;

    val &= 0x01;
    data &= ~(1 << pin);
    if (val) data |= (1 << pin);

    rv = drv_i2c_write8(addr, reg, &data, 1);
    return rv;
}