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/* Copyright 2021 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.
*/
#define DT_DRV_COMPAT cros_lis2dw12_emul
#include <device.h>
#include <drivers/i2c.h>
#include <drivers/i2c_emul.h>
#include <emul.h>
#include <errno.h>
#include <sys/__assert.h>
#include "driver/accel_lis2dw12.h"
#include "emul/emul_common_i2c.h"
#include "emul/emul_lis2dw12.h"
#include "i2c.h"
#include <logging/log.h>
LOG_MODULE_REGISTER(lis2dw12_emul, CONFIG_LIS2DW12_EMUL_LOG_LEVEL);
#define LIS2DW12_DATA_FROM_I2C_EMUL(_emul) \
CONTAINER_OF(CONTAINER_OF(_emul, struct i2c_common_emul_data, emul), \
struct lis2dw12_emul_data, common)
struct lis2dw12_emul_data {
/** Common I2C data */
struct i2c_common_emul_data common;
/** Emulated who-am-i register */
uint8_t who_am_i_reg;
/** Emulated ctrl2 register */
uint8_t ctrl2_reg;
/** Soft reset count */
uint32_t soft_reset_count;
};
struct lis2dw12_emul_cfg {
/** Common I2C config */
struct i2c_common_emul_cfg common;
};
struct i2c_emul *lis2dw12_emul_to_i2c_emul(const struct emul *emul)
{
struct lis2dw12_emul_data *data = emul->data;
return &(data->common.emul);
}
void lis2dw12_emul_reset(const struct emul *emul)
{
struct lis2dw12_emul_data *data = emul->data;
struct i2c_emul *i2c_emul = lis2dw12_emul_to_i2c_emul(emul);
i2c_common_emul_set_read_fail_reg(i2c_emul,
I2C_COMMON_EMUL_NO_FAIL_REG);
i2c_common_emul_set_write_fail_reg(i2c_emul,
I2C_COMMON_EMUL_NO_FAIL_REG);
i2c_common_emul_set_read_func(i2c_emul, NULL, NULL);
i2c_common_emul_set_write_func(i2c_emul, NULL, NULL);
data->who_am_i_reg = LIS2DW12_WHO_AM_I;
data->ctrl2_reg = 0;
data->soft_reset_count = 0;
}
void lis2dw12_emul_set_who_am_i(const struct emul *emul, uint8_t who_am_i)
{
struct lis2dw12_emul_data *data = emul->data;
data->who_am_i_reg = who_am_i;
}
uint32_t lis2dw12_emul_get_soft_reset_count(const struct emul *emul)
{
struct lis2dw12_emul_data *data = emul->data;
return data->soft_reset_count;
}
static int lis2dw12_emul_read_byte(struct i2c_emul *emul, int reg, uint8_t *val,
int bytes)
{
struct lis2dw12_emul_data *data = LIS2DW12_DATA_FROM_I2C_EMUL(emul);
switch (reg) {
case LIS2DW12_WHO_AM_I_REG:
__ASSERT_NO_MSG(bytes == 0);
*val = data->who_am_i_reg;
break;
case LIS2DW12_CTRL2_ADDR:
__ASSERT_NO_MSG(bytes == 0);
*val = data->ctrl2_reg;
break;
default:
return -EINVAL;
}
return 0;
}
static int lis2dw12_emul_write_byte(struct i2c_emul *emul, int reg, uint8_t val,
int bytes)
{
struct lis2dw12_emul_data *data = LIS2DW12_DATA_FROM_I2C_EMUL(emul);
switch (reg) {
case LIS2DW12_WHO_AM_I_REG:
LOG_ERR("Can't write to who-am-i register");
return -EINVAL;
case LIS2DW12_CTRL2_ADDR:
__ASSERT_NO_MSG(bytes == 1);
if ((val & LIS2DW12_SOFT_RESET_MASK) != 0) {
/* Soft reset */
data->soft_reset_count++;
}
data->ctrl2_reg = val & ~LIS2DW12_SOFT_RESET_MASK;
break;
default:
return -EINVAL;
}
return 0;
}
static struct i2c_emul_api lis2dw12_emul_api_i2c = {
.transfer = i2c_common_emul_transfer,
};
static int emul_lis2dw12_init(const struct emul *emul,
const struct device *parent)
{
const struct lis2dw12_emul_cfg *lis2dw12_cfg = emul->cfg;
const struct i2c_common_emul_cfg *cfg = &(lis2dw12_cfg->common);
struct lis2dw12_emul_data *data = emul->data;
data->common.emul.api = &lis2dw12_emul_api_i2c;
data->common.emul.addr = cfg->addr;
data->common.emul.parent = emul;
data->common.i2c = parent;
data->common.cfg = cfg;
i2c_common_emul_init(&data->common);
return i2c_emul_register(parent, emul->dev_label, &data->common.emul);
}
#define INIT_LIS2DW12(n) \
static struct lis2dw12_emul_data lis2dw12_emul_data_##n = { \
.common = { \
.write_byte = lis2dw12_emul_write_byte, \
.read_byte = lis2dw12_emul_read_byte, \
}, \
}; \
static const struct lis2dw12_emul_cfg lis2dw12_emul_cfg_##n = { \
.common = { \
.i2c_label = DT_INST_BUS_LABEL(n), \
.dev_label = DT_INST_LABEL(n), \
.addr = DT_INST_REG_ADDR(n), \
}, \
}; \
EMUL_DEFINE(emul_lis2dw12_init, DT_DRV_INST(n), \
&lis2dw12_emul_cfg_##n, &lis2dw12_emul_data_##n)
DT_INST_FOREACH_STATUS_OKAY(INIT_LIS2DW12)
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