/* Copyright 2022 The ChromiumOS Authors
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * CAPELLA CM32183 light sensor driver
 */

#ifndef __CROS_EC_ALS_CM32183_H
#define __CROS_EC_ALS_CM32183_H

/* I2C interface */
#define CM32183_I2C_ADDR 0x29

/* CM32183 registers */
#define CM32183_REG_CONFIGURE 0x00

#define CM32183_REG_CONFIGURE_CH_EN 0x0004

/* ALS Sensitivity_mode (BIT 12:11) */
#define CM32183_REG_CONFIGURE_ALS_SENSITIVITY_MASK GENMASK(12, 11)
#define CM32183_REG_CONFIGURE_ALS_SENSITIVITY_SHIFT 11
#define CM32183_REG_CONFIGURE_ALS_SENSITIVITY_1 0
#define CM32183_REG_CONFIGURE_ALS_SENSITIVITY_2 1
#define CM32183_REG_CONFIGURE_ALS_SENSITIVITY_1_DIV_8 2
#define CM32183_REG_CONFIGURE_ALS_SENSITIVITY_1_DIV_4 3

/*
 * Gain mode
 * 0 Gain*1
 * 1 Gain*2  (bit 10)
 */
#define CM32183_REG_CONFIGURE_GAIN BIT(10)

/*
 * ALS integration time setting which represents how long
 * ALS can update the readout value (BIT 9:6)
 * BIT 9:6     function
 *  0000         100ms
 *  0001         200ms
 *  0010         400ms
 *  0011         800ms
 */
#define CM32183_REG_CONFIGURE_ALS_INTEGRATION_MASK GENMASK(9, 6)
#define CM32183_REG_CONFIGURE_ALS_INTEGRATION_SHIFT 6
#define CM32183_REG_CONFIGURE_ALS_INTEGRATION_SET100MS 0
#define CM32183_REG_CONFIGURE_ALS_INTEGRATION_SET200MS 1
#define CM32183_REG_CONFIGURE_ALS_INTEGRATION_SET400MS 2
#define CM32183_REG_CONFIGURE_ALS_INTEGRATION_SET800MS 3

/*
 * ALS interrupt persistence setting.The interrupt pin is
 * triggered while sensor reading is out of threshold windows
 * after consecutive number of measurement cycle. (BIT 5:4)
 *  BIT 5:4      measurement cycle
 *    00                 1
 *    01                 2
 *    10                 4
 *    11                 8
 */
#define CM32183_REG_CONFIGURE_MEASUREMENT_MASK GENMASK(5, 4)
#define CM32183_REG_CONFIGURE_MEASUREMENT_SHIFT 4
#define CM32183_REG_CONFIGURE_MEASUREMENT_CYCLE_1 0
#define CM32183_REG_CONFIGURE_MEASUREMENT_CYCLE_2 1
#define CM32183_REG_CONFIGURE_MEASUREMENT_CYCLE_4 2
#define CM32183_REG_CONFIGURE_MEASUREMENT_CYCLE_8 3

/*
 * channel selection of interrupt (BIT 3)
 * 0   ALS CH interrupt
 * 1   White CH interrupt
 */
#define CM32183_REG_CONFIGURE_CHANNEL_SELECTION BIT(3)

/*
 * Channel enable (BIT 2)
 *  0   ALS CH enable only
 *  1   ALS & White CH enable
 */
#define CM32183_REG_CONFIGURE_CHANNEL_ENABLE BIT(2)

/* enable/disable interrupt function (BIT 1) */
#define CM32183_REG_CONFIGURE_INTERRUPT_ENABLE BIT(1)

/*
 * how to power on and shutdown sensor (BIT 0)
 * 0   power on
 * 1   shutdown
 */
#define CM32183_REG_CONFIGURE_POWER BIT(0)

#define CM32183_REG_INT_HSB 0x01
#define CM32183_REG_INT_LSB 0x02
#define CM32183_REG_ALS_RESULT 0x04
#define CM32183_REG_WHITE_RESULT 0x05

#define CM32183_REG_TRIGGER 0x06

#define CM32183_REG_TRIGGER_LOW_THRESHOLD BIT(15)
#define CM32183_REG_TRIGGER_HIGH_THRESHOLD BIT(14)

extern const struct accelgyro_drv cm32183_drv;

#endif /* __CROS_EC_ALS_CM32183_H */