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Diffstat (limited to 'driver/als_opt3001.c')
| -rw-r--r-- | driver/als_opt3001.c | 315 |
1 files changed, 0 insertions, 315 deletions
diff --git a/driver/als_opt3001.c b/driver/als_opt3001.c deleted file mode 100644 index 53f2b7df89..0000000000 --- a/driver/als_opt3001.c +++ /dev/null @@ -1,315 +0,0 @@ -/* Copyright 2015 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. - * - * TI OPT3001 light sensor driver - */ - -#include "common.h" -#include "driver/als_opt3001.h" -#include "i2c.h" - -#ifdef HAS_TASK_ALS -/** - * Read register from OPT3001 light sensor. - */ -static int opt3001_i2c_read(const int reg, int *data_ptr) -{ - int ret; - - ret = i2c_read16(I2C_PORT_ALS, OPT3001_I2C_ADDR_FLAGS, - reg, data_ptr); - if (!ret) - *data_ptr = ((*data_ptr << 8) & 0xFF00) | - ((*data_ptr >> 8) & 0x00FF); - - return ret; -} - -/** - * Write register to OPT3001 light sensor. - */ -static int opt3001_i2c_write(const int reg, int data) -{ - data = ((data << 8) & 0xFF00) | ((data >> 8) & 0x00FF); - return i2c_write16(I2C_PORT_ALS, OPT3001_I2C_ADDR_FLAGS, - reg, data); -} - -/** - * Initialise OPT3001 light sensor. - */ -int opt3001_init(void) -{ - int data; - int ret; - - ret = opt3001_i2c_read(OPT3001_REG_MAN_ID, &data); - if (ret) - return ret; - if (data != OPT3001_MANUFACTURER_ID) - return EC_ERROR_UNKNOWN; - - ret = opt3001_i2c_read(OPT3001_REG_DEV_ID, &data); - if (ret) - return ret; - if (data != OPT3001_DEVICE_ID) - return EC_ERROR_UNKNOWN; - - /* - * [15:12]: 0101b Automatic full scale (1310.40lux, 0.32lux/lsb) - * [11] : 1b Conversion time 800ms - * [10:9] : 10b Continuous Mode of conversion operation - * [4] : 1b Latched window-style comparison operation - */ - return opt3001_i2c_write(OPT3001_REG_CONFIGURE, 0x5C10); -} - -/** - * Read OPT3001 light sensor data. - */ -int opt3001_read_lux(int *lux, int af) -{ - int ret; - int data; - - ret = opt3001_i2c_read(OPT3001_REG_RESULT, &data); - if (ret) - return ret; - - /* - * The default power-on values will give 12 bits of precision: - * 0x0000-0x0fff indicates 0 to 1310.40 lux. We multiply the sensor - * value by a scaling factor to account for attenuation by glass, - * tinting, etc. - */ - - /* - * lux = 2EXP[3:0] × R[11:0] / 100 - */ - *lux = (1 << ((data & 0xF000) >> 12)) * (data & 0x0FFF) * af / 100; - - return EC_SUCCESS; -} - -#ifdef CONFIG_CMD_I2C_STRESS_TEST_ALS -struct i2c_stress_test_dev opt3001_i2c_stress_test_dev = { - .reg_info = { - .read_reg = OPT3001_REG_DEV_ID, - .read_val = OPT3001_DEVICE_ID, - .write_reg = OPT3001_REG_INT_LIMIT_LSB, - }, - .i2c_read_dev = &opt3001_i2c_read, - .i2c_write_dev = &opt3001_i2c_write, -}; -#endif /* CONFIG_CMD_I2C_STRESS_TEST_ALS */ -#else /* HAS_TASK_ALS */ -#include "accelgyro.h" -#include "math_util.h" - -/** - * Read register from OPT3001 light sensor. - */ -static int opt3001_i2c_read(const int port, - const uint16_t i2c_addr_flags, - const int reg, int *data_ptr) -{ - int ret; - - ret = i2c_read16(port, i2c_addr_flags, - reg, data_ptr); - if (!ret) - *data_ptr = ((*data_ptr << 8) & 0xFF00) | - ((*data_ptr >> 8) & 0x00FF); - - return ret; -} - -/** - * Write register to OPT3001 light sensor. - */ -static int opt3001_i2c_write(const int port, - const uint16_t i2c_addr_flags, - const int reg, int data) -{ - data = ((data << 8) & 0xFF00) | ((data >> 8) & 0x00FF); - return i2c_write16(port, i2c_addr_flags, reg, data); -} - -/** - * Read OPT3001 light sensor data. - */ -int opt3001_read_lux(const struct motion_sensor_t *s, intv3_t v) -{ - struct opt3001_drv_data_t *drv_data = OPT3001_GET_DATA(s); - int ret; - int data; - - ret = opt3001_i2c_read(s->port, s->i2c_spi_addr_flags, - OPT3001_REG_RESULT, &data); - if (ret) - return ret; - - /* - * lux = 2EXP[3:0] × R[11:0] / 100 - */ - data = (1 << (data >> 12)) * (data & 0x0FFF); - data += drv_data->offset * 100; - data = data * drv_data->scale + data * drv_data->uscale / 10000; - data /= 100; - - if (data < 0) - data = 1; - - v[0] = data; - 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 { - drv_data->last_value = v[0]; - return EC_SUCCESS; - } -} - -static int opt3001_set_range(struct motion_sensor_t *s, int range, - int rnd) -{ - struct opt3001_drv_data_t *drv_data = OPT3001_GET_DATA(s); - - drv_data->scale = range >> 16; - drv_data->uscale = range & 0xffff; - s->current_range = range; - return EC_SUCCESS; -} - -static int opt3001_set_data_rate(const struct motion_sensor_t *s, - int rate, int roundup) -{ - struct opt3001_drv_data_t *drv_data = OPT3001_GET_DATA(s); - int rv; - int reg; - enum opt3001_mode mode; - - if (rate == 0) { - /* - * Suspend driver: - */ - mode = OPT3001_MODE_SUSPEND; - } else { - mode = OPT3001_MODE_CONTINUOUS; - /* - * We set the sensor for continuous mode, - * integrating over 800ms. - * Do not allow range higher than 1Hz. - */ - if (rate > OPT3001_LIGHT_MAX_FREQ) - rate = OPT3001_LIGHT_MAX_FREQ; - } - rv = opt3001_i2c_read(s->port, s->i2c_spi_addr_flags, - OPT3001_REG_CONFIGURE, ®); - if (rv) - return rv; - - rv = opt3001_i2c_write(s->port, s->i2c_spi_addr_flags, - OPT3001_REG_CONFIGURE, - (reg & OPT3001_MODE_MASK) | - (mode << OPT3001_MODE_OFFSET)); - if (rv) - return rv; - - drv_data->rate = rate; - return EC_SUCCESS; -} - -static int opt3001_get_data_rate(const struct motion_sensor_t *s) -{ - struct opt3001_drv_data_t *drv_data = OPT3001_GET_DATA(s); - - return drv_data->rate; -} - -static int opt3001_set_offset(const struct motion_sensor_t *s, - const int16_t *offset, - int16_t temp) -{ - struct opt3001_drv_data_t *drv_data = OPT3001_GET_DATA(s); - - drv_data->offset = offset[X]; - return EC_SUCCESS; -} - -static int opt3001_get_offset(const struct motion_sensor_t *s, - int16_t *offset, - int16_t *temp) -{ - struct opt3001_drv_data_t *drv_data = OPT3001_GET_DATA(s); - - offset[X] = drv_data->offset; - offset[Y] = 0; - offset[Z] = 0; - *temp = EC_MOTION_SENSE_INVALID_CALIB_TEMP; - return EC_SUCCESS; -} -/** - * Initialise OPT3001 light sensor. - */ -static int opt3001_init(struct motion_sensor_t *s) -{ - int data; - int ret; - - ret = opt3001_i2c_read(s->port, s->i2c_spi_addr_flags, - OPT3001_REG_MAN_ID, &data); - if (ret) - return ret; - if (data != OPT3001_MANUFACTURER_ID) - return EC_ERROR_ACCESS_DENIED; - - ret = opt3001_i2c_read(s->port, s->i2c_spi_addr_flags, - OPT3001_REG_DEV_ID, &data); - if (ret) - return ret; - if (data != OPT3001_DEVICE_ID) - return EC_ERROR_ACCESS_DENIED; - - /* - * [15-12]: 1100b Automatic full-scale setting mode - * [11] : 1b Conversion time 800ms - * [4] : 1b Latched window-style comparison operation - */ - opt3001_i2c_write(s->port, s->i2c_spi_addr_flags, - OPT3001_REG_CONFIGURE, 0xC810); - - opt3001_set_range(s, s->default_range, 0); - - return EC_SUCCESS; -} - -const struct accelgyro_drv opt3001_drv = { - .init = opt3001_init, - .read = opt3001_read_lux, - .set_range = opt3001_set_range, - .set_offset = opt3001_set_offset, - .get_offset = opt3001_get_offset, - .set_data_rate = opt3001_set_data_rate, - .get_data_rate = opt3001_get_data_rate, -}; - -#ifdef CONFIG_CMD_I2C_STRESS_TEST_ALS -struct i2c_stress_test_dev opt3001_i2c_stress_test_dev = { - .reg_info = { - .read_reg = OPT3001_REG_DEV_ID, - .read_val = OPT3001_DEVICE_ID, - .write_reg = OPT3001_REG_INT_LIMIT_LSB, - }, - .i2c_read = &opt3001_i2c_read, - .i2c_write = &opt3001_i2c_write, -}; -#endif /* CONFIG_CMD_I2C_STRESS_TEST_ALS */ -#endif /* HAS_TASK_ALS */ |