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/* Copyright 2017 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.h"
#include "charger_profile_override.h"
#include "console.h"
#include "ioexpander_pca9555.h"
#include "util.h"
#define CPRINTS(format, args...) cprints(CC_CHARGER, format, ## args)
#define I2C_PORT_PCA555_BATT_PRESENT_GPIO NPCX_I2C_PORT0_0
#define I2C_ADDR_PCA555_BATT_PRESENT_GPIO_FLAGS 0x21
#define PCA555_BATT_PRESENT_GPIO_READ(reg, data) \
pca9555_read(I2C_PORT_PCA555_BATT_PRESENT_GPIO, \
I2C_ADDR_PCA555_BATT_PRESENT_GPIO_FLAGS, (reg), (data))
/* Shutdown mode parameter to write to manufacturer access register */
#define SB_SHUTDOWN_DATA 0x0010
enum fast_chg_voltage_ranges {
VOLTAGE_RANGE_0,
VOLTAGE_RANGE_1,
VOLTAGE_RANGE_2,
};
enum temp_range {
TEMP_RANGE_0,
TEMP_RANGE_1,
TEMP_RANGE_2,
TEMP_RANGE_3,
TEMP_RANGE_4,
TEMP_RANGE_5,
};
/* keep track of previous charge profile info */
static const struct fast_charge_profile *prev_chg_profile_info;
/* SMP-CA-445 battery & BQ30Z554 fuel gauge */
static const struct battery_info batt_info_smp_ca445 = {
.voltage_max = 8700, /* mV */
.voltage_normal = 7600,
/*
* Actual value 6000mV, added 100mV for charger accuracy so that
* unwanted low VSYS_Prochot# assertion can be avoided.
*/
.voltage_min = 6100,
.precharge_current = 150, /* mA */
.start_charging_min_c = 0,
.start_charging_max_c = 45,
.charging_min_c = 0,
.charging_max_c = 45,
.discharging_min_c = -20,
.discharging_max_c = 60,
};
const struct battery_info *battery_get_info(void)
{
static struct battery_info batt_info;
if (battery_is_present() == BP_YES)
return &batt_info_smp_ca445;
/*
* In no battery condition, to avoid voltage drop on VBATA set
* the battery minimum voltage to the battery maximum voltage.
*/
batt_info = batt_info_smp_ca445;
batt_info.voltage_min = batt_info.voltage_max;
return &batt_info;
}
static const struct fast_charge_profile fast_charge_smp_ca445_info[] = {
/* < 0C */
[TEMP_RANGE_0] = {
.temp_c = TEMPC_TENTHS_OF_DEG(-1),
.current_mA = {
[VOLTAGE_RANGE_0] = 0,
[VOLTAGE_RANGE_1] = 0,
[VOLTAGE_RANGE_2] = 0,
},
},
/* 0C >= && <=15C */
[TEMP_RANGE_1] = {
.temp_c = TEMPC_TENTHS_OF_DEG(15),
.current_mA = {
[VOLTAGE_RANGE_0] = 890,
[VOLTAGE_RANGE_1] = 445,
[VOLTAGE_RANGE_2] = 445,
},
},
/* 15C > && <=20C */
[TEMP_RANGE_2] = {
.temp_c = TEMPC_TENTHS_OF_DEG(20),
.current_mA = {
[VOLTAGE_RANGE_0] = 1335,
[VOLTAGE_RANGE_1] = 1335,
[VOLTAGE_RANGE_2] = 1335,
},
},
/* 20C > && <=45C */
[TEMP_RANGE_3] = {
.temp_c = TEMPC_TENTHS_OF_DEG(45),
.current_mA = {
[VOLTAGE_RANGE_0] = 2225,
[VOLTAGE_RANGE_1] = 2225,
[VOLTAGE_RANGE_2] = 2225,
},
},
/* 45C > && <=55C */
[TEMP_RANGE_4] = {
.temp_c = TEMPC_TENTHS_OF_DEG(55),
.current_mA = {
[VOLTAGE_RANGE_0] = 1335,
[VOLTAGE_RANGE_1] = 1335,
[VOLTAGE_RANGE_2] = 0,
},
},
/* > 55C */
[TEMP_RANGE_5] = {
.temp_c = TEMPC_TENTHS_OF_DEG(CHARGER_PROF_TEMP_C_LAST_RANGE),
.current_mA = {
[VOLTAGE_RANGE_0] = 0,
[VOLTAGE_RANGE_1] = 0,
[VOLTAGE_RANGE_2] = 0,
},
},
};
static const struct fast_charge_params fast_chg_params_smp_ca445 = {
.total_temp_ranges = ARRAY_SIZE(fast_charge_smp_ca445_info),
.default_temp_range_profile = TEMP_RANGE_3,
.voltage_mV = {
[VOLTAGE_RANGE_0] = 8000,
[VOLTAGE_RANGE_1] = 8200,
[VOLTAGE_RANGE_2] = CHARGER_PROF_VOLTAGE_MV_LAST_RANGE,
},
.chg_profile_info = &fast_charge_smp_ca445_info[0],
};
/*
* This can override the smart battery's charging profile. To make a change,
* modify one or more of requested_voltage, requested_current, or state.
* Leave everything else unchanged.
*
* Return the next poll period in usec, or zero to use the default (which is
* state dependent).
*/
int charger_profile_override(struct charge_state_data *curr)
{
/*
* If battery present and not in cut off and almost full
* then if it does not want charge then discharge on AC
*/
if ((battery_is_present() == BP_YES) &&
!(curr->batt.flags & BATT_FLAG_WANT_CHARGE) &&
(curr->batt.status & STATUS_FULLY_CHARGED)) {
charger_discharge_on_ac(1);
curr->state = ST_DISCHARGE;
return 0;
}
charger_discharge_on_ac(0);
return charger_profile_override_common(curr,
&fast_chg_params_smp_ca445,
&prev_chg_profile_info,
batt_info_smp_ca445.voltage_max);
}
int board_cut_off_battery(void)
{
int rv;
/* Ship mode command must be sent twice to take effect */
rv = sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
if (rv != EC_SUCCESS)
return rv;
return sb_write(SB_MANUFACTURER_ACCESS, SB_SHUTDOWN_DATA);
}
static inline int batt_smp_cos4870_is_initialized(void)
{
int batt_status;
return battery_status(&batt_status) ? 0 :
batt_status & STATUS_INITIALIZED;
}
enum battery_present battery_hw_present(void)
{
int data;
int rv;
rv = PCA555_BATT_PRESENT_GPIO_READ(PCA9555_CMD_INPUT_PORT_0, &data);
/* GPIO is low when the battery is physically present */
return rv || (data & PCA9555_IO_5) ? BP_NO : BP_YES;
}
/*
* Physical detection of battery.
*/
enum battery_present battery_is_present(void)
{
static enum battery_present batt_pres_prev = BP_NOT_SURE;
enum battery_present batt_pres;
/* Get the physical hardware status */
batt_pres = battery_hw_present();
/*
* Make sure battery status is implemented, I2C transactions are
* success & the battery status is Initialized to find out if it
* is a working battery and it is not in the cut-off mode.
*
* FETs are turned off after Power Shutdown time.
* The device will wake up when a voltage is applied to PACK.
* Battery status will be inactive until it is initialized.
*/
if (batt_pres == BP_YES && batt_pres_prev != batt_pres &&
!battery_is_cut_off() && !batt_smp_cos4870_is_initialized())
batt_pres = BP_NO;
batt_pres_prev = batt_pres;
return batt_pres;
}
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