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/* Copyright 2023 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "driver/ppc/nx20p348x.h"
#include "emul/emul_common_i2c.h"
#include "emul/emul_stub_device.h"
#include "usbc/ppc_nx20p348x.h"
#include "usbc_ppc.h"
#include "util.h"
#include <zephyr/device.h>
#include <zephyr/logging/log.h>
#include <zephyr/ztest.h>
#define DT_DRV_COMPAT NX20P348X_COMPAT
#define LOG_LEVEL CONFIG_I2C_LOG_LEVEL
LOG_MODULE_REGISTER(emul_nx20p348x);
/*
* Device control reg marks the end of defined regs for the NX20P3483 (0x0B)
*/
#define NX20P348X_MAX_REG NX20P348X_DEVICE_CONTROL_REG
struct nx20p348x_emul_data {
struct i2c_common_emul_data common;
uint8_t regs[NX20P348X_MAX_REG + 1];
};
struct nx20p348x_reg_default {
uint8_t offset;
uint8_t val;
};
/* Chip defaults for non-zero registers (spec Rev 0.4 Table 9) */
struct nx20p348x_reg_default nx20p348x_defaults[] = {
{ .offset = NX20P348X_DEVICE_ID_REG, .val = 0x09 },
{ .offset = NX20P348X_OVLO_THRESHOLD_REG, .val = 0x01 },
{ .offset = NX20P348X_HV_SRC_OCP_THRESHOLD_REG, .val = 0x0B },
{ .offset = NX20P348X_5V_SRC_OCP_THRESHOLD_REG, .val = 0x0B },
};
void nx20p348x_emul_reset_regs(const struct emul *emul)
{
struct nx20p348x_emul_data *data =
(struct nx20p348x_emul_data *)emul->data;
memset(data->regs, 0, sizeof(data->regs));
for (int i = 0; i < ARRAY_SIZE(nx20p348x_defaults); i++) {
struct nx20p348x_reg_default def = nx20p348x_defaults[i];
data->regs[def.offset] = def.val;
}
}
uint8_t nx20p348x_emul_peek(const struct emul *emul, int reg)
{
__ASSERT_NO_MSG(IN_RANGE(reg, 0, NX20P348X_MAX_REG));
struct nx20p348x_emul_data *data =
(struct nx20p348x_emul_data *)emul->data;
return data->regs[reg];
}
static int nx20p348x_emul_read(const struct emul *emul, int reg, uint8_t *val,
int bytes, void *unused_data)
{
struct nx20p348x_emul_data *data =
(struct nx20p348x_emul_data *)emul->data;
if (!IN_RANGE(reg, 0, NX20P348X_MAX_REG)) {
LOG_ERR("Register out of range: %d", reg);
return -EINVAL;
}
if (bytes != 0) {
LOG_ERR("Emulator expects single byte transactions: "
"%d bytes requested",
bytes);
return -EINVAL;
}
*val = data->regs[reg];
return 0;
}
static int nx20p348x_emul_write(const struct emul *emul, int reg, uint8_t val,
int bytes, void *unused_data)
{
struct nx20p348x_emul_data *data =
(struct nx20p348x_emul_data *)emul->data;
if (!IN_RANGE(reg, 0, NX20P348X_MAX_REG)) {
LOG_ERR("Register out of range: %d", reg);
return -EINVAL;
}
if (bytes != 1) {
LOG_ERR("Emulator expects single byte transactions: "
"%d bytes written",
bytes);
return -EINVAL;
}
data->regs[reg] = val;
return 0;
}
static int nx20p348x_emul_init(const struct emul *emul,
const struct device *parent)
{
struct nx20p348x_emul_data *data =
(struct nx20p348x_emul_data *)emul->data;
struct i2c_common_emul_data *common_data = &data->common;
i2c_common_emul_init(common_data);
i2c_common_emul_set_read_func(common_data, nx20p348x_emul_read, NULL);
i2c_common_emul_set_write_func(common_data, nx20p348x_emul_write, NULL);
nx20p348x_emul_reset_regs(emul);
return 0;
}
#define INIT_NX20P348X_EMUL(n) \
static struct i2c_common_emul_cfg common_cfg_##n; \
static struct nx20p348x_emul_data nx20p348x_emul_data_##n; \
static struct i2c_common_emul_cfg common_cfg_##n = { \
.dev_label = DT_NODE_FULL_NAME(DT_DRV_INST(n)), \
.data = &nx20p348x_emul_data_##n.common, \
.addr = DT_INST_REG_ADDR(n) \
}; \
EMUL_DT_INST_DEFINE(n, nx20p348x_emul_init, &nx20p348x_emul_data_##n, \
&common_cfg_##n, &i2c_common_emul_api, NULL)
DT_INST_FOREACH_STATUS_OKAY(INIT_NX20P348X_EMUL)
DT_INST_FOREACH_STATUS_OKAY(EMUL_STUB_DEVICE);
static void nx20p348x_emul_reset_rule_before(const struct ztest_unit_test *test,
void *data)
{
ARG_UNUSED(test);
ARG_UNUSED(data);
#define NX20P348X_EMUL_RESET_RULE_BEFORE(n) \
nx20p348x_emul_reset_regs(EMUL_DT_GET(DT_DRV_INST(n)))
DT_INST_FOREACH_STATUS_OKAY(NX20P348X_EMUL_RESET_RULE_BEFORE);
}
ZTEST_RULE(nx20p348x_emul_reset, nx20p348x_emul_reset_rule_before, NULL);
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