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Lockpick_RCM/bdk/power/bq24193.c

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2020-06-26 21:17:06 +01:00
/*
* Battery charger driver for Nintendo Switch's TI BQ24193
*
* Copyright (c) 2018 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "bq24193.h"
#include <soc/i2c.h>
#include <utils/util.h>
static u8 bq24193_get_reg(u8 reg)
{
return i2c_recv_byte(I2C_1, BQ24193_I2C_ADDR, reg);
}
int bq24193_get_property(enum BQ24193_reg_prop prop, int *value)
{
u8 data;
switch (prop) {
case BQ24193_InputVoltageLimit: // Input voltage limit (mV).
data = bq24193_get_reg(BQ24193_InputSource);
data = (data & BQ24193_INCONFIG_VINDPM_MASK) >> 3;
*value = 0;
*value += ((data >> 0) & 1) ? 80 : 0;
*value += ((data >> 1) & 1) ? 160 : 0;
*value += ((data >> 2) & 1) ? 320 : 0;
*value += ((data >> 3) & 1) ? 640 : 0;
*value += 3880;
break;
case BQ24193_InputCurrentLimit: // Input current limit (mA).
data = bq24193_get_reg(BQ24193_InputSource);
data &= BQ24193_INCONFIG_INLIMIT_MASK;
switch (data)
{
case 0:
*value = 100;
break;
case 1:
*value = 150;
break;
case 2:
*value = 500;
break;
case 3:
*value = 900;
break;
case 4:
*value = 1200;
break;
case 5:
*value = 1500;
break;
case 6:
*value = 2000;
break;
case 7:
*value = 3000;
break;
}
break;
case BQ24193_SystemMinimumVoltage: // Minimum system voltage limit (mV).
data = bq24193_get_reg(BQ24193_PORConfig);
*value = (data & BQ24193_PORCONFIG_SYSMIN_MASK) >> 1;
*value *= 100;
*value += 3000;
break;
case BQ24193_FastChargeCurrentLimit: // Fast charge current limit (mA).
data = bq24193_get_reg(BQ24193_ChrgCurr);
data = (data & BQ24193_CHRGCURR_ICHG_MASK) >> 2;
*value = 0;
*value += ((data >> 0) & 1) ? 64 : 0;
*value += ((data >> 1) & 1) ? 128 : 0;
*value += ((data >> 2) & 1) ? 256 : 0;
*value += ((data >> 3) & 1) ? 512 : 0;
*value += ((data >> 4) & 1) ? 1024 : 0;
*value += ((data >> 5) & 1) ? 2048 : 0;
*value += 512;
data = bq24193_get_reg(BQ24193_ChrgCurr);
data &= BQ24193_CHRGCURR_20PCT_MASK;
if (data)
*value = *value * 20 / 100; // Fast charge current limit is 20%.
break;
case BQ24193_ChargeVoltageLimit: // Charge voltage limit (mV).
data = bq24193_get_reg(BQ24193_ChrgVolt);
data = (data & BQ24193_CHRGVOLT_VREG) >> 2;
*value = 0;
*value += ((data >> 0) & 1) ? 16 : 0;
*value += ((data >> 1) & 1) ? 32 : 0;
*value += ((data >> 2) & 1) ? 64 : 0;
*value += ((data >> 3) & 1) ? 128 : 0;
*value += ((data >> 4) & 1) ? 256 : 0;
*value += ((data >> 5) & 1) ? 512 : 0;
*value += 3504;
break;
case BQ24193_RechargeThreshold: // Recharge voltage threshold less than voltage limit (mV).
data = bq24193_get_reg(BQ24193_ChrgVolt);
data &= BQ24193_IRTHERMAL_THERM_MASK;
if (data)
*value = 300;
else
*value = 100;
break;
case BQ24193_ThermalRegulation: // Thermal regulation threshold (oC).
data = bq24193_get_reg(BQ24193_IRCompThermal);
data &= BQ24193_IRTHERMAL_THERM_MASK;
switch (data)
{
case 0:
*value = 60;
break;
case 1:
*value = 80;
break;
case 2:
*value = 100;
break;
case 3:
*value = 120;
break;
}
break;
case BQ24193_ChargeStatus: // 0: Not charging, 1: Pre-charge, 2: Fast charging, 3: Charge termination done
data = bq24193_get_reg(BQ24193_Status);
*value = (data & BQ24193_STATUS_CHRG_MASK) >> 4;
break;
case BQ24193_TempStatus: // 0: Normal, 2: Warm, 3: Cool, 5: Cold, 6: Hot.
data = bq24193_get_reg(BQ24193_FaultReg);
*value = data & BQ24193_FAULT_THERM_MASK;
break;
case BQ24193_DevID: // Dev ID.
data = bq24193_get_reg(BQ24193_VendorPart);
*value = data & BQ24193_VENDORPART_DEV_MASK;
break;
case BQ24193_ProductNumber: // Product number.
data = bq24193_get_reg(BQ24193_VendorPart);
*value = (data & BQ24193_VENDORPART_PN_MASK) >> 3;
break;
default:
return -1;
}
return 0;
}
void bq24193_enable_charger()
{
u8 reg = bq24193_get_reg(BQ24193_PORConfig);
reg &= ~BQ24193_PORCONFIG_CHGCONFIG_MASK;
reg |= BQ24193_PORCONFIG_CHGCONFIG_CHARGER_EN;
i2c_send_byte(I2C_1, BQ24193_I2C_ADDR, BQ24193_PORConfig, reg);
}
void bq24193_fake_battery_removal()
{
// Disable watchdog to keep BATFET disabled.
u8 value = bq24193_get_reg(BQ24193_ChrgTermTimer);
value &= ~BQ24193_CHRGTERM_WATCHDOG_MASK;
i2c_send_byte(I2C_1, BQ24193_I2C_ADDR, BQ24193_ChrgTermTimer, value);
// Force BATFET to disabled state. This disconnects the battery from the system.
value = bq24193_get_reg(BQ24193_Misc);
value |= BQ24193_MISC_BATFET_DI_MASK;
i2c_send_byte(I2C_1, BQ24193_I2C_ADDR, BQ24193_Misc, value);
}