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/* Copyright 2017 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* Rohm BH1730 Ambient light sensor driver
*/
#ifndef __CROS_EC_ALS_BH1730_H
#define __CROS_EC_ALS_BH1730_H
/* I2C interface */
#define BH1730_I2C_ADDR_FLAGS 0x29
/* BH1730 registers */
#define BH1730_CONTROL 0x80
#define BH1730_TIMING 0x81
#define BH1730_INTERRUPT 0x82
#define BH1730_THLLOW 0x83
#define BH1730_THLHIGH 0x84
#define BH1730_THHLOW 0x85
#define BH1730_THHHIGH 0x86
#define BH1730_GAIN 0x87
#define BH1730_OPART_ID 0x92
#define BH1730_DATA0LOW 0x94
#define BH1730_DATA0HIGH 0x95
#define BH1730_DATA1LOW 0x96
#define BH1730_DATA1HIGH 0x97
/* Software reset */
#define BH1730_RESET 0xE4
/* Registers bits */
#define BH1730_CONTROL_ADC_INTR_INACTIVE (0x00 << 5)
#define BH1730_CONTROL_ADC_INTR_ACTIVE (0x01 << 5)
#define BH1730_CONTROL_ADC_VALID (0x01 << 4)
#define BH1730_CONTROL_ONE_TIME_CONTINOUS (0x00 << 3)
#define BH1730_CONTROL_ONE_TIME_ONETIME (0x01 << 3)
#define BH1730_CONTROL_DATA_SEL_TYPE0_AND_1 (0x00 << 2)
#define BH1730_CONTROL_DATA_SEL_TYPE0 (0x01 << 2)
#define BH1730_CONTROL_ADC_EN_DISABLE (0x00 << 1)
#define BH1730_CONTROL_ADC_EN_ENABLE (0x01 << 1)
#define BH1730_CONTROL_POWER_DISABLE (0x00 << 0)
#define BH1730_CONTROL_POWER_ENABLE (0x01 << 0)
#define BH1730_GAIN_GAIN_X1_GAIN (0x00 << 0)
#define BH1730_GAIN_GAIN_X2_GAIN (0x01 << 0)
#define BH1730_GAIN_GAIN_X64_GAIN (0x02 << 0)
#define BH1730_GAIN_GAIN_X128_GAIN (0x03 << 0)
/* Sensor configuration */
/* Select Gain */
#define BH1730_CONF_GAIN BH1730_GAIN_GAIN_X64_GAIN
#define BH1730_GAIN_DIV 64
/* Select Itime, 0xDA is 102.6ms = 38*2.7ms */
#define BH1730_CONF_ITIME 0xDA
#define ITIME_MS_X_10 ((256 - BH1730_CONF_ITIME) * 27)
#define ITIME_MS_X_1K (ITIME_MS_X_10 * 100)
/* default Itime is about 10Hz */
#define BH1730_10000_MHZ (10 * 1000)
#define BH1730_MAX_FREQ BH1730_10000_MHZ
/*
* 10Hz is too fast for the AP: allow the AP query data less often, the EC will
* downsample.
*/
#define BH1730_MIN_FREQ (BH1730_MAX_FREQ / 100)
/*
* Use default lux calculation formula parameters if board specific
* parameters are not defined.
*/
#ifndef CONFIG_ALS_BH1730_LUXTH_PARAMS
#define BH1730_LUXTH1_1K 260
#define BH1730_LUXTH1_D0_1K 1290
#define BH1730_LUXTH1_D1_1K 2733
#define BH1730_LUXTH2_1K 550
#define BH1730_LUXTH2_D0_1K 797
#define BH1730_LUXTH2_D1_1K 859
#define BH1730_LUXTH3_1K 1090
#define BH1730_LUXTH3_D0_1K 510
#define BH1730_LUXTH3_D1_1K 345
#define BH1730_LUXTH4_1K 2130
#define BH1730_LUXTH4_D0_1K 276
#define BH1730_LUXTH4_D1_1K 130
#endif
#define BH1730_GET_DATA(_s) ((struct bh1730_drv_data_t *)(_s)->drv_data)
struct bh1730_drv_data_t {
int rate;
int last_value;
};
extern const struct accelgyro_drv bh1730_drv;
#endif /* __CROS_EC_ALS_BH1730_H */
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