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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.
*/
/* Trogdor family-specific USB-C configuration */
#include "charger.h"
#include "charger/isl923x_public.h"
#include "charge_state.h"
#include "temp_sensor.h"
#include "usb_pd.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
#define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
const struct charger_config_t chg_chips[] = {
{
.i2c_port = I2C_PORT_CHARGER,
.i2c_addr_flags = ISL923X_ADDR_FLAGS,
.drv = &isl923x_drv,
},
};
struct temp_chg_step {
int low; /* temp thershold ('C) to lower level*/
int high; /* temp thershold ('C) to higher level */
int current; /* charging limitation (mA) */
};
static const struct temp_chg_step temp_chg_table[] = {
{.low = 0, .high = 50, .current = 3000}, /* Lv0: normal charge */
{.low = 48, .high = 53, .current = 1500},
{.low = 51, .high = 56, .current = 1000},
{.low = 54, .high = 100, .current = 800},
};
#define NUM_TEMP_CHG_LEVELS ARRAY_SIZE(temp_chg_table)
int charger_profile_override(struct charge_state_data *curr)
{
static int current_level;
int charger_temp, charger_temp_c;
int usb_mv;
int port;
if (curr->state != ST_CHARGE)
return 0;
/* charge current control depends on temp if the system is on */
if (chipset_in_state(CHIPSET_STATE_ON)) {
temp_sensor_read(TEMP_SENSOR_SYS2, &charger_temp);
charger_temp_c = K_TO_C(charger_temp);
if (charger_temp_c <= temp_chg_table[current_level].low)
current_level--;
else if (charger_temp_c >= temp_chg_table[current_level].high)
current_level++;
if (current_level < 0)
current_level = 0;
if (current_level >= NUM_TEMP_CHG_LEVELS)
current_level = NUM_TEMP_CHG_LEVELS - 1;
curr->requested_current = MIN(curr->requested_current,
temp_chg_table[current_level].current);
}
/* Lower the max requested voltage to 5V when battery is full. */
if (chipset_in_state(CHIPSET_STATE_ANY_OFF) &&
!(curr->batt.flags & BATT_FLAG_BAD_STATUS) &&
!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) &&
(curr->batt.status & STATUS_FULLY_CHARGED))
usb_mv = 5000;
else
usb_mv = PD_MAX_VOLTAGE_MV;
if (pd_get_max_voltage() != usb_mv) {
CPRINTS("VBUS limited to %dmV", usb_mv);
for (port = 0; port < CONFIG_USB_PD_PORT_MAX_COUNT; port++)
pd_set_external_voltage_limit(port, usb_mv);
}
return 0;
}
enum ec_status charger_profile_override_get_param(uint32_t param,
uint32_t *value)
{
return EC_RES_INVALID_PARAM;
}
enum ec_status charger_profile_override_set_param(uint32_t param,
uint32_t value)
{
return EC_RES_INVALID_PARAM;
}
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