651 lines
17 KiB
C
651 lines
17 KiB
C
/*
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* bq25898s_charger.c
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* Samsung bq25898s Charger Driver
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*
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* Copyright (C) 2015 Samsung Electronics
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*
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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 version 2 as
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* published by the Free Software Foundation.
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*/
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#define DEBUG
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/power_supply.h>
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include "include/charger/bq25898s_charger.h"
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#define ENABLE 1
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#define DISABLE 0
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static enum power_supply_property bq25898s_charger_props[] = {
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};
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int bq25898s_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
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{
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struct bq25898s_charger *bq25898s = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&bq25898s->i2c_lock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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mutex_unlock(&bq25898s->i2c_lock);
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if (ret < 0) {
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pr_info("%s reg(0x%x), ret(%d)\n", __func__, reg, ret);
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return ret;
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}
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ret &= 0xff;
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*dest = ret;
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return 0;
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}
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int bq25898s_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
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{
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struct bq25898s_charger *bq25898s = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&bq25898s->i2c_lock);
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ret = i2c_smbus_write_byte_data(i2c, reg, value);
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mutex_unlock(&bq25898s->i2c_lock);
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if (ret < 0)
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pr_info("%s reg(0x%x), ret(%d)\n",
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__func__, reg, ret);
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return ret;
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}
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int bq25898s_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
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{
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struct bq25898s_charger *bq25898s = i2c_get_clientdata(i2c);
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int ret;
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mutex_lock(&bq25898s->i2c_lock);
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ret = i2c_smbus_read_byte_data(i2c, reg);
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if (ret >= 0) {
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u8 old_val = ret & 0xff;
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u8 new_val = (val & mask) | (old_val & (~mask));
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ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
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}
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mutex_unlock(&bq25898s->i2c_lock);
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return ret;
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}
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static void bq25898s_test_read(struct bq25898s_charger *charger)
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{
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u8 reg;
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u8 reg_data;
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char str[1024]={0,};
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for (reg = 0x00; reg <= 0x14; reg++) {
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bq25898s_read_reg(charger->i2c, reg, ®_data);
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sprintf(str + strlen(str), "0x%02x:0x%02x,", reg, reg_data);
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}
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pr_info("%s : %s\n", __func__, str);
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}
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static int bq25898s_get_charge_current(struct bq25898s_charger *charger)
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{
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u8 data;
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int charge_current;
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bq25898s_read_reg(charger->i2c, BQ25898S_CHG_REG_04, &data);
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charge_current = (data & 0x3F) * 64;
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pr_info("%s : DATA(0x%02x), current(%d)\n", __func__, data, charge_current);
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return charge_current;
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}
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static int bq25898s_get_float_voltage(struct bq25898s_charger *charger)
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{
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u8 data;
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int max_voltage;
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bq25898s_read_reg(charger->i2c, BQ25898S_CHG_REG_06, &data);
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max_voltage = (data >> 2) * 16;
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pr_info("%s : DATA(0x%02x) VOLTAGE(%d)\n", __func__, data, max_voltage);
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return max_voltage;
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}
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static int bq25898s_get_input_current(struct bq25898s_charger *charger)
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{
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u8 data;
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int input_current;
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bq25898s_read_reg(charger->i2c, BQ25898S_CHG_REG_00, &data);
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input_current = (data & 0x3F) * 50;
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pr_info("%s : DATA(0x%02x), current(%d)\n", __func__, data, input_current);
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return input_current;
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}
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static void bq25898s_set_charge_current(struct bq25898s_charger *charger, int charging_current)
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{
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u8 data;
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data = charging_current / 64;
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pr_info("%s: charging_current(%d), 0x%x \n", __func__, charging_current, data);
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_04,
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data, BQ25898S_CHG_ICHG_MASK);
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}
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static void bq25898s_set_input_current(struct bq25898s_charger *charger, int input_current)
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{
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u8 data;
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data = (input_current - 100) / 50;
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pr_info ("%s : SET INPUT CURRENT(%d), 0x%x\n", __func__, input_current, data);
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_00,
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data, BQ25898S_CHG_IINLIM_MASK);
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}
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static void bq25898s_watchdog_reset(struct bq25898s_charger *charger)
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{
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_03, 0x40, 0x40);
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}
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static void bq25898s_set_watchdog_timer(struct bq25898s_charger *charger, int time)
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{
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_07,
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time << BQ25898S_CHG_WATCHDOG_SHIFT, BQ25898S_CHG_WATCHDOG_MASK);
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}
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static void bq25898s_set_float_voltage(struct bq25898s_charger *charger, int float_voltage)
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{
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u8 data;
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data = ((float_voltage - 38400) / 10 / 16) << 2;
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pr_info("%s: voltage(%d), 0x%x \n", __func__, float_voltage, data);
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_06,
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data, BQ25898S_CHG_VREG_MASK);
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}
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static void bq25898s_charger_initialize(struct bq25898s_charger *charger)
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{
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bq25898s_set_input_current(charger, 3150);
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bq25898s_set_watchdog_timer(charger, WATCHDOG_TIMER_80S);
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/* termination current 64mA*/
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_05, 0x1, 0x0F);
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/* set max float voltage */
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bq25898s_set_float_voltage(charger, 46080);
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bq25898s_test_read(charger);
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}
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static void bq25898s_set_charger_state(struct bq25898s_charger *charger,
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int enable)
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{
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pr_info("%s: CHARGE_EN(%s)\n",__func__, enable > 0 ? "ENABLE" : "DISABLE");
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bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_03,
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(enable << BQ25898S_CHG_CONFIG_SHIFT), BQ25898S_CHG_CONFIG_MASK);
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bq25898s_test_read(charger);
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}
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static irqreturn_t bq25898s_irq_handler(int irq, void *data)
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{
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struct bq25898s_charger *charger = data;
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u8 val;
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bq25898s_read_reg(charger->i2c, BQ25898S_CHG_REG_0C, &val);
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dev_info(charger->dev,
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"%s: 0x%x\n", __func__, val);
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return IRQ_HANDLED;
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}
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static int bq25898s_chg_get_property(struct power_supply *psy,
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enum power_supply_property psp,
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union power_supply_propval *val)
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{
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struct bq25898s_charger *charger =
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container_of(psy, struct bq25898s_charger, psy_chg);
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enum power_supply_ext_property ext_psp = psp;
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val->intval = 0;
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switch (psp) {
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case POWER_SUPPLY_PROP_ONLINE:
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val->intval = charger->cable_type;
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break;
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case POWER_SUPPLY_PROP_PRESENT:
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case POWER_SUPPLY_PROP_STATUS:
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break;
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case POWER_SUPPLY_PROP_CHARGE_TYPE:
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break;
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case POWER_SUPPLY_PROP_HEALTH:
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bq25898s_watchdog_reset(charger);
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bq25898s_test_read(charger);
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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bq25898s_get_input_current(charger);
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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val->intval = bq25898s_get_charge_current(charger);
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break;
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case POWER_SUPPLY_PROP_CURRENT_AVG:
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
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break;
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#if defined(CONFIG_BATTERY_SWELLING)
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case POWER_SUPPLY_PROP_VOLTAGE_MAX:
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val->intval = bq25898s_get_float_voltage(charger);
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break;
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#endif
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case POWER_SUPPLY_PROP_USB_HC:
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return -ENODATA;
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case POWER_SUPPLY_PROP_CHARGE_NOW:
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break;
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case POWER_SUPPLY_PROP_MAX ... POWER_SUPPLY_EXT_PROP_MAX:
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switch (ext_psp) {
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case POWER_SUPPLY_EXT_PROP_CHECK_SLAVE_I2C:
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{
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u8 reg_data;
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bq25898s_read_reg(charger->i2c, BQ25898S_CHG_REG_11, ®_data);
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if((reg_data > 0x93) && (reg_data < 0x9D)) // 4.5V ~ 5.5V
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val->intval = 1;
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else
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val->intval = 0;
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pr_info("%s: reg_data : %d\n", __func__,reg_data);
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}
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break;
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case POWER_SUPPLY_EXT_PROP_CHECK_MULTI_CHARGE:
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val->intval = charger->is_charging ?
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POWER_SUPPLY_STATUS_CHARGING : POWER_SUPPLY_STATUS_DISCHARGING;
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break;
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default:
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return -EINVAL;
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}
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static int bq25898s_chg_set_property(struct power_supply *psy,
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enum power_supply_property psp,
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const union power_supply_propval *val)
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{
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struct bq25898s_charger *charger =
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container_of(psy, struct bq25898s_charger, psy_chg);
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switch (psp) {
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/* val->intval : type */
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case POWER_SUPPLY_PROP_CHARGING_ENABLED:
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charger->is_charging =
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(val->intval == SEC_BAT_CHG_MODE_CHARGING) ? ENABLE : DISABLE;
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bq25898s_set_charger_state(charger, charger->is_charging);
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break;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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charger->charging_current = val->intval;
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bq25898s_set_charge_current(charger, charger->charging_current);
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break;
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
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charger->siop_level = val->intval;
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break;
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case POWER_SUPPLY_PROP_ONLINE:
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charger->cable_type = val->intval;
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bq25898s_charger_initialize(charger);
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX:
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charger->float_voltage = val->intval;
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break;
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case POWER_SUPPLY_PROP_STATUS:
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case POWER_SUPPLY_PROP_CURRENT_FULL:
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break;
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case POWER_SUPPLY_PROP_CURRENT_MAX:
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case POWER_SUPPLY_PROP_HEALTH:
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return -ENODATA;
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default:
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return -EINVAL;
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}
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return 0;
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}
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static ssize_t bq25898s_store_addr(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct power_supply *psy = dev_get_drvdata(dev);
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struct bq25898s_charger *charger = container_of(psy, struct bq25898s_charger, psy_chg);
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int x;
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if (sscanf(buf, "0x%x\n", &x) == 1) {
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charger->addr = x;
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}
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return count;
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}
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static ssize_t bq25898s_show_addr(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct power_supply *psy = dev_get_drvdata(dev);
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struct bq25898s_charger *charger = container_of(psy, struct bq25898s_charger, psy_chg);
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return sprintf(buf, "0x%x\n", charger->addr);
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}
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static ssize_t bq25898s_store_size(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct power_supply *psy = dev_get_drvdata(dev);
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struct bq25898s_charger *charger = container_of(psy, struct bq25898s_charger, psy_chg);
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int x;
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if (sscanf(buf, "%d\n", &x) == 1) {
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charger->size = x;
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}
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return count;
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}
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static ssize_t bq25898s_show_size(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct power_supply *psy = dev_get_drvdata(dev);
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struct bq25898s_charger *charger = container_of(psy, struct bq25898s_charger, psy_chg);
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return sprintf(buf, "0x%x\n", charger->size);
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}
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static ssize_t bq25898s_store_data(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct power_supply *psy = dev_get_drvdata(dev);
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struct bq25898s_charger *charger = container_of(psy, struct bq25898s_charger, psy_chg);
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int x;
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if (sscanf(buf, "0x%x", &x) == 1) {
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u8 data = x;
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if (bq25898s_write_reg(charger->i2c, charger->addr, data) < 0)
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{
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dev_info(charger->dev,
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"%s: addr: 0x%x write fail\n", __func__, charger->addr);
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}
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}
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return count;
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}
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static ssize_t bq25898s_show_data(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct power_supply *psy = dev_get_drvdata(dev);
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struct bq25898s_charger *charger = container_of(psy, struct bq25898s_charger, psy_chg);
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u8 data;
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int i, count = 0;;
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if (charger->size == 0)
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charger->size = 1;
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for (i = 0; i < charger->size; i++) {
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if (bq25898s_read_reg(charger->i2c, charger->addr+i, &data) < 0) {
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dev_info(charger->dev,
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"%s: read fail\n", __func__);
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count += sprintf(buf+count, "addr: 0x%x read fail\n", charger->addr+i);
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continue;
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}
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count += sprintf(buf+count, "addr: 0x%x, data: 0x%x\n", charger->addr+i,data);
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}
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return count;
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}
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static DEVICE_ATTR(addr, 0644, bq25898s_show_addr, bq25898s_store_addr);
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static DEVICE_ATTR(size, 0644, bq25898s_show_size, bq25898s_store_size);
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static DEVICE_ATTR(data, 0644, bq25898s_show_data, bq25898s_store_data);
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static struct attribute *bq25898s_attributes[] = {
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&dev_attr_addr.attr,
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&dev_attr_size.attr,
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&dev_attr_data.attr,
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NULL
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};
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static const struct attribute_group bq25898s_attr_group = {
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.attrs = bq25898s_attributes,
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};
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#ifdef CONFIG_OF
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static int bq25898s_charger_parse_dt(struct bq25898s_charger *charger,
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struct bq25898s_charger_platform_data *pdata)
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{
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struct device_node *np = of_find_node_by_name(NULL, "bq25898s-charger");
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int ret = 0;
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if (!np) {
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pr_err("%s: np is NULL\n", __func__);
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return -1;
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} else {
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ret = of_get_named_gpio_flags(np, "bq25898s-charger,irq-gpio",
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0, NULL);
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if (ret < 0) {
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pr_err("%s: bq25898s-charger,irq-gpio is empty\n", __func__);
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pdata->irq_gpio = 0;
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} else {
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pdata->irq_gpio = ret;
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pr_info("%s: irq-gpio = %d\n", __func__, pdata->irq_gpio);
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}
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}
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np = of_find_node_by_name(NULL, "battery");
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if (!np) {
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pr_err("%s np NULL\n", __func__);
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} else {
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ret = of_property_read_u32(np, "battery,chg_float_voltage",
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&charger->float_voltage);
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if (ret) {
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pr_info("%s: battery,chg_float_voltage is Empty\n", __func__);
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charger->float_voltage = 42000;
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}
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}
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return 0;
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}
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#endif
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static int bq25898s_charger_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
|
|
{
|
|
struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
|
|
struct bq25898s_charger *charger;
|
|
struct bq25898s_charger_platform_data *pdata = client->dev.platform_data;
|
|
|
|
int ret = 0;
|
|
|
|
pr_info("%s: bq25898s Charger Driver Loading\n", __func__);
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
|
|
return -EIO;
|
|
|
|
charger = kzalloc(sizeof(*charger), GFP_KERNEL);
|
|
if (!charger)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&charger->i2c_lock);
|
|
charger->dev = &client->dev;
|
|
charger->i2c = client;
|
|
|
|
if (client->dev.of_node) {
|
|
|
|
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata) {
|
|
dev_err(&client->dev, "Failed to allocate memory\n");
|
|
ret = -ENOMEM;
|
|
goto err_parse_dt_nomem;
|
|
}
|
|
#if defined(CONFIG_OF)
|
|
ret = bq25898s_charger_parse_dt(charger, pdata);
|
|
if (ret < 0) {
|
|
pr_err("%s not found charger dt! ret[%d]\n",
|
|
__func__, ret);
|
|
goto err_parse_dt;
|
|
}
|
|
#endif
|
|
}
|
|
charger->pdata = pdata;
|
|
i2c_set_clientdata(client, charger);
|
|
|
|
|
|
charger->psy_chg.name = "bq25898s-charger";
|
|
charger->psy_chg.type = POWER_SUPPLY_TYPE_UNKNOWN;
|
|
charger->psy_chg.get_property = bq25898s_chg_get_property;
|
|
charger->psy_chg.set_property = bq25898s_chg_set_property;
|
|
charger->psy_chg.properties = bq25898s_charger_props;
|
|
charger->psy_chg.num_properties = ARRAY_SIZE(bq25898s_charger_props);
|
|
|
|
charger->cable_type = POWER_SUPPLY_TYPE_BATTERY;
|
|
bq25898s_charger_initialize(charger);
|
|
|
|
ret = power_supply_register(&client->dev, &charger->psy_chg);
|
|
if (ret) {
|
|
pr_err("%s: Failed to Register psy_chg\n", __func__);
|
|
goto err_data_free;
|
|
}
|
|
if (pdata->irq_gpio) {
|
|
charger->chg_irq = gpio_to_irq(pdata->irq_gpio);
|
|
|
|
ret = request_threaded_irq(charger->chg_irq, NULL,
|
|
bq25898s_irq_handler,
|
|
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
|
|
"bq25898s-irq", charger);
|
|
if (ret < 0) {
|
|
pr_err("%s: Failed to Request IRQ(%d)\n", __func__, ret);
|
|
goto err_req_irq;
|
|
}
|
|
}
|
|
device_init_wakeup(charger->dev, 1);
|
|
|
|
ret = sysfs_create_group(&charger->psy_chg.dev->kobj, &bq25898s_attr_group);
|
|
if (ret) {
|
|
dev_info(&client->dev,
|
|
"%s: sysfs_create_group failed\n", __func__);
|
|
}
|
|
pr_info("%s: bq25898s Charger Driver Loaded\n", __func__);
|
|
|
|
return 0;
|
|
|
|
err_req_irq:
|
|
power_supply_unregister(&charger->psy_chg);
|
|
err_data_free:
|
|
err_parse_dt:
|
|
kfree(pdata);
|
|
err_parse_dt_nomem:
|
|
mutex_destroy(&charger->i2c_lock);
|
|
kfree(charger);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct i2c_device_id bq25898s_charger_id[] = {
|
|
{"bq25898s-charger", 0},
|
|
{}
|
|
};
|
|
|
|
#ifdef CONFIG_OF
|
|
static struct of_device_id bq25898s_charger_match_table[] = {
|
|
{.compatible = "ti,bq25898s-charger"},
|
|
{},
|
|
};
|
|
#else
|
|
#define da9155_charger_match_table NULL
|
|
#endif
|
|
|
|
static void bq25898s_charger_shutdown(struct i2c_client *client)
|
|
{
|
|
struct bq25898s_charger *charger = i2c_get_clientdata(client);
|
|
|
|
if (charger->chg_irq)
|
|
free_irq(charger->chg_irq, charger);
|
|
pr_info("%s: bq25898s Charger driver shutdown\n", __func__);
|
|
if (!charger->i2c) {
|
|
pr_err("%s: no bq25898s i2c client\n", __func__);
|
|
return;
|
|
}
|
|
/* reset register */
|
|
bq25898s_update_reg(charger->i2c, BQ25898S_CHG_REG_14, 0x80, 0x80);
|
|
}
|
|
|
|
static int bq25898s_charger_remove(struct i2c_client *client)
|
|
{
|
|
struct bq25898s_charger *charger = i2c_get_clientdata(client);
|
|
|
|
if (charger->chg_irq)
|
|
free_irq(charger->chg_irq, charger);
|
|
power_supply_unregister(&charger->psy_chg);
|
|
mutex_destroy(&charger->i2c_lock);
|
|
kfree(charger->pdata);
|
|
kfree(charger);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if defined CONFIG_PM
|
|
static int bq25898s_charger_suspend(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
|
|
struct bq25898s_charger *charger = i2c_get_clientdata(i2c);
|
|
if (charger->chg_irq) {
|
|
if (device_may_wakeup(dev))
|
|
enable_irq_wake(charger->chg_irq);
|
|
disable_irq(charger->chg_irq);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int bq25898s_charger_resume(struct device *dev)
|
|
{
|
|
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
|
|
struct bq25898s_charger *charger = i2c_get_clientdata(i2c);
|
|
if (charger->chg_irq) {
|
|
if (device_may_wakeup(dev))
|
|
disable_irq_wake(charger->chg_irq);
|
|
enable_irq(charger->chg_irq);
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
#define bq25898s_charger_suspend NULL
|
|
#define bq25898s_charger_resume NULL
|
|
#endif
|
|
|
|
|
|
static SIMPLE_DEV_PM_OPS(bq25898s_charger_pm_ops, bq25898s_charger_suspend,
|
|
bq25898s_charger_resume);
|
|
|
|
static struct i2c_driver bq25898s_charger_driver = {
|
|
.driver = {
|
|
.name = "bq25898s-charger",
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_PM
|
|
.pm = &bq25898s_charger_pm_ops,
|
|
#endif
|
|
.of_match_table = bq25898s_charger_match_table,
|
|
},
|
|
.probe = bq25898s_charger_probe,
|
|
.remove = bq25898s_charger_remove,
|
|
.shutdown = bq25898s_charger_shutdown,
|
|
.id_table = bq25898s_charger_id,
|
|
};
|
|
|
|
static int __init bq25898s_charger_init(void)
|
|
{
|
|
pr_info("%s : \n", __func__);
|
|
return i2c_add_driver(&bq25898s_charger_driver);
|
|
}
|
|
|
|
static void __exit bq25898s_charger_exit(void)
|
|
{
|
|
i2c_del_driver(&bq25898s_charger_driver);
|
|
}
|
|
|
|
module_init(bq25898s_charger_init);
|
|
module_exit(bq25898s_charger_exit);
|
|
|
|
MODULE_DESCRIPTION("Samsung BQ25898S Charger Driver");
|
|
MODULE_AUTHOR("Samsung Electronics");
|
|
MODULE_LICENSE("GPL");
|