Add Battery Charger & Fuel Gauge dirvers
* Add Fuel gauge configuration fix * Add Battery de-sync fix * Fuel gauge registers dumping * Add help and battery status in menu
This commit is contained in:
Kostas Missos
373
ipl/max17050.c
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373
ipl/max17050.c
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/*
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* Fuel gauge driver for Nintendo Switch's Maxim 17050
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*
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* Copyright (C) 2011 Samsung Electronics
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* MyungJoo Ham <myungjoo.ham@samsung.com>
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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
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* This driver is based on max17040_battery.c
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*/
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#include "max17050.h"
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#include "i2c.h"
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#include "util.h"
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/* Status register bits */
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#define STATUS_POR_BIT (1 << 1)
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#define STATUS_BST_BIT (1 << 3)
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#define STATUS_VMN_BIT (1 << 8)
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#define STATUS_TMN_BIT (1 << 9)
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#define STATUS_SMN_BIT (1 << 10)
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#define STATUS_BI_BIT (1 << 11)
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#define STATUS_VMX_BIT (1 << 12)
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#define STATUS_TMX_BIT (1 << 13)
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#define STATUS_SMX_BIT (1 << 14)
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#define STATUS_BR_BIT (1 << 15)
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/* Interrupt mask bits */
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#define CONFIG_ALRT_BIT_ENBL (1 << 2)
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#define STATUS_INTR_SOCMIN_BIT (1 << 10)
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#define STATUS_INTR_SOCMAX_BIT (1 << 14)
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#define VFSOC0_LOCK 0x0000
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#define VFSOC0_UNLOCK 0x0080
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#define dP_ACC_100 0x1900
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#define dP_ACC_200 0x3200
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#define MAX17050_VMAX_TOLERANCE 50 /* 50 mV */
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static int _max17050_get_temperature(int *temp)
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{
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u16 data;
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_TEMP);
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*temp = (s16)data;
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/* The value is converted into deci-centigrade scale */
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/* Units of LSB = 1 / 256 degree Celsius */
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*temp = *temp * 10 / 256;
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return 0;
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}
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int _max17050_get_status(int *status)
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{
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int charge_full, charge_now;
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int avg_current;
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u16 data;
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/*
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* The MAX170xx has builtin end-of-charge detection and will update
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* FullCAP to match RepCap when it detects end of charging.
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*
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* When this cycle the battery gets charged to a higher (calculated)
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* capacity then the previous cycle then FullCAP will get updated
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* contineously once end-of-charge detection kicks in, so allow the
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* 2 to differ a bit.
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*/
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i2c_recv_buf_small((u8 *)&charge_full, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_FullCAP);
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i2c_recv_buf_small((u8 *)&charge_now, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_RepCap);
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if ((charge_full - charge_now) <= MAX17050_FULL_THRESHOLD) {
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*status = 0xFF; //FULL
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return 0;
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}
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/*
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* Even though we are supplied, we may still be discharging if the
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* supply is e.g. only delivering 5V 0.5A. Check current if available.
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*/
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_AvgCurrent);
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avg_current = (s16)data;
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avg_current *= 1562500 / MAX17050_DEFAULT_SNS_RESISTOR;
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if (avg_current > 0)
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*status = 0x1; //Charging
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else
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*status = 0x0; //Discharging
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return 0;
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}
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int _max17050_get_battery_health(int *health)
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{
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int temp, vavg, vbatt;
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u16 val;
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i2c_recv_buf_small((u8 *)&val, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_AvgVCELL);
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/* bits [0-3] unused */
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vavg = val * 625 / 8;
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/* Convert to millivolts */
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vavg /= 1000;
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i2c_recv_buf_small((u8 *)&val, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_VCELL);
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/* bits [0-3] unused */
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vbatt = val * 625 / 8;
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/* Convert to millivolts */
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vbatt /= 1000;
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if (vavg < MAX17050_DEFAULT_VMIN) {
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*health = HEALTH_DEAD;
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goto out;
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}
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if (vbatt > MAX17050_DEFAULT_VMAX + MAX17050_VMAX_TOLERANCE) {
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*health = HEALTH_OVERVOLTAGE;
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goto out;
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}
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_max17050_get_temperature(&temp);
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if (temp < MAX17050_DEFAULT_TEMP_MIN) {
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*health = HEALTH_COLD;
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goto out;
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}
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if (temp > MAX17050_DEFAULT_TEMP_MAX) {
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*health = HEALTH_OVERHEAT;
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goto out;
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}
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*health = HEALTH_GOOD; // 1
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out:
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return 0;
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}
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int max17050_get_property(enum MAX17050_reg reg, int *value)
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{
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u16 data;
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switch (reg) {
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//case 0x101://///////////////////////////FIX
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// _max17050_get_status(value);
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// break;
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case MAX17050_Cycles: //Cycle count.
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i2c_recv_buf_small((u8 *)value, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_Cycles);
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break;
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case MAX17050_MinMaxVolt: //Voltage max/min
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i2c_recv_buf_small((u8 *)value, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_MinMaxVolt);
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//value = (data >> 8) * 20; /* Voltage MAX. Units of LSB = 20mV */
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//value = (data & 0xff) * 20; /* Voltage MIN. Units of 20mV */
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*value = data;
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break;
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case MAX17050_V_empty: //Voltage min design.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_V_empty);
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*value = (data >> 7) * 10; /* Units of LSB = 10mV */
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break;
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case MAX17050_VCELL: //Voltage now.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_VCELL);
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*value = data * 625 / 8 / 1000;
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break;
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case MAX17050_AvgVCELL: //Voltage avg.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_AvgVCELL);
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*value = data * 625 / 8 / 1000;
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break;
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case MAX17050_OCVInternal: //Voltage ocv.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_OCVInternal);
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*value = data * 625 / 8 / 1000;
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break;
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case MAX17050_RepSOC: //Capacity %.
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i2c_recv_buf_small((u8 *)value, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_RepSOC);
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break;
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case MAX17050_DesignCap: //Charge full design.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_DesignCap);
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data = data * 5 / 10;
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*value = data;
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break;
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case MAX17050_FullCAP: //Charge full.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_FullCAP);
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data = data * 5 / 10;
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*value = data;
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break;
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case MAX17050_RepCap: //Charge now.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_RepCap);
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data = data * 5 / 10;
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*value = data;
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break;
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case MAX17050_TEMP: //Temp.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_TEMP);
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*value = (s16)(data);
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*value = *value * 10 / 256;
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break;
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//case 0x100: //FIX me
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// _max17050_get_battery_health(value);
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// break;
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case MAX17050_Current: //Current now.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_Current);
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*value = (s16)data;
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*value *= 1562500 / MAX17050_DEFAULT_SNS_RESISTOR;
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break;
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case MAX17050_AvgCurrent: //Current avg.
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i2c_recv_buf_small((u8 *)&data, 2, I2C_1, MAXIM17050_I2C_ADDR, MAX17050_AvgCurrent);
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*value = (s16)data;
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*value *= 1562500 / MAX17050_DEFAULT_SNS_RESISTOR;
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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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static int _max17050_write_verify_reg(u8 reg, u16 value)
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{
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int retries = 8;
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int ret;
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u16 read_value;
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do {
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ret = i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, reg, (u8 *)&value, 2);
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i2c_recv_buf_small((u8 *)&read_value, 2, I2C_1, MAXIM17050_I2C_ADDR, reg);
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if (read_value != value) {
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ret = -1;
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retries--;
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}
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} while (retries && read_value != value);
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return ret;
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}
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static void _max17050_override_por(u8 reg, u16 value)
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{
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if (value)
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i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, reg, (u8 *)&value, 2);
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}
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static void _max17050_load_new_capacity_params()
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{
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u16 fullcap, repSoc, dq_acc, dp_acc;
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fullcap = 0x2476; // 4667mAh design capacity.
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dq_acc = 0x10bc; // From a healthy fuel gauge.
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dp_acc = 0x5e09; // =||=
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repSoc = 0x6400; // 100%.
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_max17050_write_verify_reg(MAX17050_RemCap, fullcap);
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_max17050_write_verify_reg(MAX17050_RepCap, fullcap);
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_max17050_write_verify_reg(MAX17050_dQacc, dq_acc);
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_max17050_write_verify_reg(MAX17050_dPacc, dp_acc);
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_max17050_write_verify_reg(MAX17050_FullCAP, fullcap);
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//i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_DesignCap, (u8 *)&fullcap, 2);
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_max17050_write_verify_reg(MAX17050_FullCAPNom, fullcap);
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/* Update SOC register with new SOC */
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i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_RepSOC, (u8 *)&repSoc, 2);
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}
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static void _max17050_reset_vfsoc0_reg()
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{
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u16 lockVal = 0;
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u16 vfSoc = 0x6440; // >100% for fully charged battery
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lockVal = VFSOC0_UNLOCK;
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i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_VFSOC0Enable, (u8 *)&lockVal, 2);
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_max17050_write_verify_reg(MAX17050_VFSOC0, vfSoc);
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lockVal = VFSOC0_LOCK;
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i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_VFSOC0Enable, (u8 *)&lockVal, 2);
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}
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static void _max17050_update_capacity_regs()
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{
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u16 value = 0x2476; //Set to 4667mAh design capacity.
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_max17050_write_verify_reg(MAX17050_FullCAP, value);
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_max17050_write_verify_reg(MAX17050_FullCAPNom, value);
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//i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_DesignCap, config->design_cap, 2);
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}
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static void _max17050_write_config_regs()
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{
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u16 value = 0;
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value = 0x7254;
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i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_CONFIG, (u8 *)&value, 2);
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value = 0x2473;
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i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_LearnCFG, (u8 *)&value, 2);
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//i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_FilterCFG, (u8 *)&value, 2)
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//i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_RelaxCFG, (u8 *)&value, 2)
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//i2c_send_buf_small(I2C_1, MAXIM17050_I2C_ADDR, MAX17050_FullSOCThr, (u8 *)&value, 2)
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}
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/*
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* Block write all the override values coming from platform data.
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* This function MUST be called before the POR initialization proceedure
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* specified by maxim.
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*/
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static void _max17050_override_por_values()
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{
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u16 dq_acc = 0x10bc; // From a healthy fuel gauge.
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u16 dp_acc = 0x5e09; // =||=
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_max17050_override_por(MAX17050_dQacc, dq_acc);
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_max17050_override_por(MAX17050_dPacc, dp_acc);
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//_max17050_override_por(MAX17050_RCOMP0, config->rcomp0); //0x58
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//_max17050_override_por(MAX17050_TempCo, config->tcompc0); //0x1b22
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//u16 k_empty0 = 0x439;
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//_max17050_override_por(map, MAX17050_K_empty0, k_empty0); // unknown cell data
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}
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static void _max17050_set_por_bit(u16 value)
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{
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_max17050_write_verify_reg(MAX17050_STATUS, value);
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}
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int max17050_fix_configuration()
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{
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/* Init phase, set the POR bit */
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_max17050_set_por_bit(STATUS_POR_BIT);
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/* Override POR values */
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_max17050_override_por_values();
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/* After Power up, the MAX17050 requires 500ms in order
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* to perform signal debouncing and initial SOC reporting
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*/
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sleep(500000);
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/* Initialize configaration */
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_max17050_write_config_regs();
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/* update capacity params */
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_max17050_update_capacity_regs();
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/* delay must be atleast 350mS to allow VFSOC
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* to be calculated from the new configuration
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*/
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sleep(350000);
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/* reset vfsoc0 reg */
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_max17050_reset_vfsoc0_reg();
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/* load new capacity params */
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_max17050_load_new_capacity_params();
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/* Init complete, Clear the POR bit */
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//_max17050_set_por_bit(0); // Should we? Or let the switch to reconfigure POR?
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// Sets POR, BI, BR.
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_max17050_set_por_bit(0x8801);
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return 0;
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}
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