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/* Copyright 2016 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/**
* Commons acc/gyro function for ST sensors in Chrome EC
*/
#include "stm_mems_common.h"
/**
* st_raw_read_n - Read n bytes for read
*/
int st_raw_read_n(const int port,
const uint16_t i2c_addr_flags,
const uint8_t reg, uint8_t *data_ptr, const int len)
{
/* TODO: Implement SPI interface support */
return i2c_read_block(port, i2c_addr_flags,
reg | 0x80, data_ptr, len);
}
/**
* st_raw_read_n_noinc - Read n bytes for read (no auto inc address)
*/
int st_raw_read_n_noinc(const int port,
const uint16_t i2c_addr_flags,
const uint8_t reg, uint8_t *data_ptr, const int len)
{
/* TODO: Implement SPI interface support */
return i2c_read_block(port, i2c_addr_flags,
reg, data_ptr, len);
}
/**
* st_write_data_with_mask - Write register with mask
* @s: Motion sensor pointer
* @reg: Device register
* @mask: The mask to search
* @data: Data pointer
*/
int st_write_data_with_mask(const struct motion_sensor_t *s, int reg,
uint8_t mask, uint8_t data)
{
int err;
int new_data = 0x00, old_data = 0x00;
err = st_raw_read8(s->port, s->i2c_spi_addr_flags,
reg, &old_data);
if (err != EC_SUCCESS)
return err;
new_data = ((old_data & (~mask)) |
((data << __builtin_ctz(mask)) & mask));
if (new_data == old_data)
return EC_SUCCESS;
return st_raw_write8(s->port, s->i2c_spi_addr_flags,
reg, new_data);
}
/**
* st_get_resolution - Get bit resolution
* @s: Motion sensor pointer
*/
int st_get_resolution(const struct motion_sensor_t *s)
{
struct stprivate_data *data = s->drv_data;
return data->resol;
}
/**
* st_set_offset - Set data offset
* @s: Motion sensor pointer
* @offset: offset vector
* @temp: Temp
*/
int st_set_offset(const struct motion_sensor_t *s,
const int16_t *offset, int16_t temp)
{
struct stprivate_data *data = s->drv_data;
data->offset[X] = offset[X];
data->offset[Y] = offset[Y];
data->offset[Z] = offset[Z];
return EC_SUCCESS;
}
/**
* st_get_offset - Get data offset
* @s: Motion sensor pointer
* @offset: offset vector
* @temp: Temp
*/
int st_get_offset(const struct motion_sensor_t *s,
int16_t *offset, int16_t *temp)
{
struct stprivate_data *data = s->drv_data;
offset[X] = data->offset[X];
offset[Y] = data->offset[Y];
offset[Z] = data->offset[Z];
*temp = EC_MOTION_SENSE_INVALID_CALIB_TEMP;
return EC_SUCCESS;
}
/**
* st_get_data_rate - Get data rate (ODR)
* @s: Motion sensor pointer
*/
int st_get_data_rate(const struct motion_sensor_t *s)
{
struct stprivate_data *data = s->drv_data;
return data->base.odr;
}
/**
* st_normalize - Apply LSB data sens. and rotation based on sensor resolution
* @s: Motion sensor pointer
* @v: output vector
* @data: LSB raw data
*/
void st_normalize(const struct motion_sensor_t *s, intv3_t v, uint8_t *data)
{
int i;
struct stprivate_data *drvdata = s->drv_data;
/*
* Data is left-aligned and the bottom bits need to be
* cleared because they may contain trash data.
*/
uint16_t mask = ~((1 << (16 - drvdata->resol)) - 1);
for (i = X; i <= Z; i++) {
v[i] = ((data[i * 2 + 1] << 8) | data[i * 2]) & mask;
}
rotate(v, *s->rot_standard_ref, v);
for (i = X; i <= Z; i++)
v[i] += (drvdata->offset[i] << 5) / s->current_range;
}
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