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