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/* Copyright 2019 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.
*
* Battery pack vendor provided charging profile
*/
#include "battery_fuel_gauge.h"
#include "charge_state.h"
#include "common.h"
#include "system.h"
#include "util.h"
/*
* Battery info for all Hatch battery types. Note that the fields
* start_charging_min/max and charging_min/max are not used for the charger.
* The effective temperature limits are given by discharging_min/max_c.
*
* Fuel Gauge (FG) parameters which are used for determining if the battery
* is connected, the appropriate ship mode (battery cutoff) command, and the
* charge/discharge FETs status.
*
* Ship mode (battery cutoff) requires 2 writes to the appropriate smart battery
* register. For some batteries, the charge/discharge FET bits are set when
* charging/discharging is active, in other types, these bits set mean that
* charging/discharging is disabled. Therefore, in addition to the mask for
* these bits, a disconnect value must be specified. Note that for TI fuel
* gauge, the charge/discharge FET status is found in Operation Status (0x54),
* but a read of Manufacturer Access (0x00) will return the lower 16 bits of
* Operation status which contains the FET status bits.
*
* The assumption for battery types supported is that the charge/discharge FET
* status can be read with a sb_read() command and therefore, only the register
* address, mask, and disconnect value need to be provided.
*/
/* charging current is limited to 0.45C */
#define CHARGING_CURRENT_45C 2804
const struct board_batt_params board_battery_info[] = {
/* Dyna Battery Information */
[BATTERY_DYNA] = {
.fuel_gauge = {
.manuf_name = "Dyna",
.ship_mode = {
.reg_addr = 0x0,
.reg_data = { 0x10, 0x10 },
},
.fet = {
.reg_addr = 0x0,
.reg_mask = 0x2000,
.disconnect_val = 0x2000,
}
},
.batt_info = {
.voltage_max = 8700,
.voltage_normal = 7600, /* mV */
.voltage_min = 6000, /* mV */
.precharge_current = 150, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 60,
.discharging_min_c = -20,
.discharging_max_c = 60,
},
},
[BATTERY_SDI] = {
.fuel_gauge = {
.manuf_name = "SDI",
.device_name = "4404D62",
.ship_mode = {
.reg_addr = 0x00,
.reg_data = { 0x0010, 0x0010 },
},
.fet = {
.mfgacc_support = 0,
.reg_addr = 0x00,
.reg_mask = 0xc000,
.disconnect_val = 0x8000,
}
},
.batt_info = {
.voltage_max = 8800,
.voltage_normal = 7700, /* mV */
.voltage_min = 6000, /* mV */
.precharge_current = 200, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 55,
.discharging_min_c = -20,
.discharging_max_c = 70,
},
},
};
BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_SDI;
enum battery_present variant_battery_present(void)
{
if (system_get_board_version() != 1)
return BP_NOT_SURE;
/*
* For board version 1, there is a known issue with battery present
* signal. So, always return BP_YES indicating battery is
* present. battery_status() later should fail to talk to the battery in
* case the battery is not really present.
*/
return BP_YES;
}
int charger_profile_override(struct charge_state_data *curr)
{
if (chipset_in_state(CHIPSET_STATE_ANY_OFF))
return 0;
if (curr->requested_current > CHARGING_CURRENT_45C)
curr->requested_current = CHARGING_CURRENT_45C;
return 0;
}
/* Customs options controllable by host command. */
#define PARAM_FASTCHARGE (CS_PARAM_CUSTOM_PROFILE_MIN + 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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