diff options
Diffstat (limited to 'driver/als_bh1730.c')
| -rw-r--r-- | driver/als_bh1730.c | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/driver/als_bh1730.c b/driver/als_bh1730.c deleted file mode 100644 index 56afb86e0b..0000000000 --- a/driver/als_bh1730.c +++ /dev/null @@ -1,180 +0,0 @@ -/* Copyright 2017 The Chromium OS Authors. All rights reserved. - * 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 - */ - -#include "accelgyro.h" -#include "config.h" -#include "console.h" -#include "driver/als_bh1730.h" -#include "i2c.h" - -#define CPRINTS(format, args...) cprints(CC_MOTION_SENSE, format, ## args) -#define CPRINTF(format, args...) cprintf(CC_MOTION_SENSE, format, ## args) - -/** - * Convert BH1730 data0, data1 to lux - */ -static int bh1730_convert_to_lux(uint32_t data0_1) -{ - int lux; - uint16_t data0 = 0x0000ffff & data0_1; - uint16_t data1 = data0_1 >> 16; - uint32_t d0_1k = data0 * 1000; - uint32_t d1_1k = data1 * 1000; - uint32_t d_temp; - uint32_t d_lux; - - if (data0 == 0) - return 0; - else - d_temp = d1_1k / data0; - - if(d_temp < BH1730_LUXTH1_1K) { - d0_1k = BH1730_LUXTH1_D0_1K * data0; - d1_1k = BH1730_LUXTH1_D1_1K * data1; - } else if(d_temp < BH1730_LUXTH2_1K) { - d0_1k = BH1730_LUXTH2_D0_1K * data0; - d1_1k = BH1730_LUXTH2_D1_1K * data1; - } else if(d_temp < BH1730_LUXTH3_1K) { - d0_1k = BH1730_LUXTH3_D0_1K * data0; - d1_1k = BH1730_LUXTH3_D1_1K * data1; - } else if(d_temp < BH1730_LUXTH4_1K) { - d0_1k = BH1730_LUXTH4_D0_1K * data0; - d1_1k = BH1730_LUXTH4_D1_1K * data1; - } else - return 0; - - d_lux = (d0_1k - d1_1k) / BH1730_GAIN_DIV; - d_lux *= 100; - lux = d_lux / ITIME_MS_X_1K; - - return lux; -} - -/** - * Read BH1730 light sensor data. - */ -static int bh1730_read_lux(const struct motion_sensor_t *s, intv3_t v) -{ - struct bh1730_drv_data_t *drv_data = BH1730_GET_DATA(s); - int ret; - int data0_1; - - /* read data0 and data1 from sensor */ - ret = i2c_read32(s->port, s->i2c_spi_addr_flags, - BH1730_DATA0LOW, &data0_1); - if (ret != EC_SUCCESS) { - CPRINTF("bh1730_read_lux - fail %d\n", ret); - return ret; - } - - /* convert sensor data0 and data1 to lux */ - v[0] = bh1730_convert_to_lux(data0_1); - v[1] = 0; - v[2] = 0; - - /* - * Return an error when nothing change to prevent filling the - * fifo with useless data. - */ - if (v[0] == drv_data->last_value) - return EC_ERROR_UNCHANGED; - else - return EC_SUCCESS; -} - -static int bh1730_set_range(struct motion_sensor_t *s, int range, - int rnd) -{ - /* Range is fixed by hardware */ - if (range != s->default_range) - return EC_ERROR_INVAL; - - s->current_range = range; - return EC_SUCCESS; -} - -static int bh1730_set_data_rate(const struct motion_sensor_t *s, - int rate, int roundup) -{ - struct bh1730_drv_data_t *drv_data = BH1730_GET_DATA(s); - - /* now only one rate supported */ - drv_data->rate = BH1730_10000_MHZ; - - return EC_SUCCESS; -} - -static int bh1730_get_data_rate(const struct motion_sensor_t *s) -{ - struct bh1730_drv_data_t *drv_data = BH1730_GET_DATA(s); - - return drv_data->rate; -} - -static int bh1730_set_offset(const struct motion_sensor_t *s, - const int16_t *offset, - int16_t temp) -{ - return EC_SUCCESS; -} - -static int bh1730_get_offset(const struct motion_sensor_t *s, - int16_t *offset, - int16_t *temp) -{ - *offset = 0; - - return EC_SUCCESS; -} - -/** - * Initialise BH1730 Ambient light sensor. - */ -static int bh1730_init(struct motion_sensor_t *s) -{ - int ret; - - /* power and measurement bit high */ - ret = i2c_write8(s->port, s->i2c_spi_addr_flags, - BH1730_CONTROL, - BH1730_CONTROL_POWER_ENABLE - | BH1730_CONTROL_ADC_EN_ENABLE); - - if (ret != EC_SUCCESS) { - CPRINTF("bh1730_init_sensor - enable fail %d\n", ret); - return ret; - } - - /* set timing */ - ret = i2c_write8(s->port, s->i2c_spi_addr_flags, - BH1730_TIMING, BH1730_CONF_ITIME); - if (ret != EC_SUCCESS) { - CPRINTF("bh1730_init_sensor - time fail %d\n", ret); - return ret; - } - /* set ADC gain */ - ret = i2c_write8(s->port, s->i2c_spi_addr_flags, - BH1730_GAIN, BH1730_CONF_GAIN); - - if (ret != EC_SUCCESS) { - CPRINTF("bh1730_init_sensor - gain fail %d\n", ret); - return ret; - } - - return sensor_init_done(s); -} - -const struct accelgyro_drv bh1730_drv = { - .init = bh1730_init, - .read = bh1730_read_lux, - .set_range = bh1730_set_range, - .set_offset = bh1730_set_offset, - .get_offset = bh1730_get_offset, - .set_data_rate = bh1730_set_data_rate, - .get_data_rate = bh1730_get_data_rate, -}; - |