Add s3c-adc-battery driver
s3c-adc-battery is driver for monitoring and charging battery on iPAQ H1930/H1940/RX1950. It depends on s3c-adc driver to get battery voltage and current. Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Vasily Khoruzhick
Anton Vorontsov
parent
6721081b6b
commit
808be4b22f
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@ -136,6 +136,12 @@ config BATTERY_Z2
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help
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Say Y to include support for the battery on the Zipit Z2.
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config BATTERY_S3C_ADC
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tristate "Battery driver for Samsung ADC based monitoring"
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depends on S3C_ADC
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help
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Say Y here to enable support for iPAQ h1930/h1940/rx1950 battery
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config CHARGER_PCF50633
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tristate "NXP PCF50633 MBC"
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depends on MFD_PCF50633
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@ -33,5 +33,6 @@ obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
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obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
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obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
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obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
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obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
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obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
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obj-$(CONFIG_BATTERY_INTEL_MID) += intel_mid_battery.o
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@ -0,0 +1,431 @@
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/*
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* iPAQ h1930/h1940/rx1950 battery controler driver
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* Copyright (c) Vasily Khoruzhick
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* Based on h1940_battery.c by Arnaud Patard
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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*/
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/power_supply.h>
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#include <linux/leds.h>
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#include <linux/gpio.h>
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#include <linux/err.h>
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#include <linux/timer.h>
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#include <linux/jiffies.h>
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#include <linux/s3c_adc_battery.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <plat/adc.h>
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#define BAT_POLL_INTERVAL 10000 /* ms */
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#define JITTER_DELAY 500 /* ms */
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struct s3c_adc_bat {
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struct power_supply psy;
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struct s3c_adc_client *client;
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struct s3c_adc_bat_pdata *pdata;
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int volt_value;
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int cur_value;
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unsigned int timestamp;
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int level;
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int status;
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int cable_plugged:1;
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};
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static struct delayed_work bat_work;
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static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
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{
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schedule_delayed_work(&bat_work,
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msecs_to_jiffies(JITTER_DELAY));
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}
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static enum power_supply_property s3c_adc_backup_bat_props[] = {
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_MIN,
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POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
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};
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static int s3c_adc_backup_bat_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 s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
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if (!bat) {
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dev_err(psy->dev, "%s: no battery infos ?!\n", __func__);
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return -EINVAL;
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}
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if (bat->volt_value < 0 ||
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jiffies_to_msecs(jiffies - bat->timestamp) >
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BAT_POLL_INTERVAL) {
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bat->volt_value = s3c_adc_read(bat->client,
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bat->pdata->backup_volt_channel);
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bat->volt_value *= bat->pdata->backup_volt_mult;
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bat->timestamp = jiffies;
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}
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switch (psp) {
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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val->intval = bat->volt_value;
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return 0;
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case POWER_SUPPLY_PROP_VOLTAGE_MIN:
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val->intval = bat->pdata->backup_volt_min;
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return 0;
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case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
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val->intval = bat->pdata->backup_volt_max;
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return 0;
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default:
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return -EINVAL;
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}
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}
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static struct s3c_adc_bat backup_bat = {
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.psy = {
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.name = "backup-battery",
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.type = POWER_SUPPLY_TYPE_BATTERY,
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.properties = s3c_adc_backup_bat_props,
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.num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props),
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.get_property = s3c_adc_backup_bat_get_property,
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.use_for_apm = 1,
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},
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};
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static enum power_supply_property s3c_adc_main_bat_props[] = {
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POWER_SUPPLY_PROP_STATUS,
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POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
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POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
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POWER_SUPPLY_PROP_CHARGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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};
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static int calc_full_volt(int volt_val, int cur_val, int impedance)
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{
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return volt_val + cur_val * impedance / 1000;
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}
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static int s3c_adc_bat_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 s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
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int new_level;
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int full_volt;
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const struct s3c_adc_bat_thresh *lut = bat->pdata->lut_noac;
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unsigned int lut_size = bat->pdata->lut_noac_cnt;
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if (!bat) {
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dev_err(psy->dev, "no battery infos ?!\n");
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return -EINVAL;
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}
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if (bat->volt_value < 0 || bat->cur_value < 0 ||
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jiffies_to_msecs(jiffies - bat->timestamp) >
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BAT_POLL_INTERVAL) {
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bat->volt_value = s3c_adc_read(bat->client,
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bat->pdata->volt_channel) * bat->pdata->volt_mult;
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bat->cur_value = s3c_adc_read(bat->client,
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bat->pdata->current_channel) * bat->pdata->current_mult;
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bat->timestamp = jiffies;
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}
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if (bat->cable_plugged &&
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((bat->pdata->gpio_charge_finished < 0) ||
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!gpio_get_value(bat->pdata->gpio_charge_finished))) {
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lut = bat->pdata->lut_acin;
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lut_size = bat->pdata->lut_acin_cnt;
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}
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new_level = 100000;
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full_volt = calc_full_volt((bat->volt_value / 1000),
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(bat->cur_value / 1000), bat->pdata->internal_impedance);
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if (full_volt < calc_full_volt(lut->volt, lut->cur,
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bat->pdata->internal_impedance)) {
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lut_size--;
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while (lut_size--) {
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int lut_volt1;
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int lut_volt2;
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lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur,
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bat->pdata->internal_impedance);
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lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur,
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bat->pdata->internal_impedance);
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if (full_volt < lut_volt1 && full_volt >= lut_volt2) {
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new_level = (lut[1].level +
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(lut[0].level - lut[1].level) *
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(full_volt - lut_volt2) /
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(lut_volt1 - lut_volt2)) * 1000;
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break;
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}
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new_level = lut[1].level * 1000;
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lut++;
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}
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}
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bat->level = new_level;
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switch (psp) {
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case POWER_SUPPLY_PROP_STATUS:
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if (bat->pdata->gpio_charge_finished < 0)
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val->intval = bat->level == 100000 ?
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POWER_SUPPLY_STATUS_FULL : bat->status;
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else
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val->intval = bat->status;
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return 0;
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case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
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val->intval = 100000;
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return 0;
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case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
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val->intval = 0;
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return 0;
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case POWER_SUPPLY_PROP_CHARGE_NOW:
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val->intval = bat->level;
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return 0;
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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val->intval = bat->volt_value;
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return 0;
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case POWER_SUPPLY_PROP_CURRENT_NOW:
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val->intval = bat->cur_value;
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return 0;
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default:
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return -EINVAL;
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}
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}
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static struct s3c_adc_bat main_bat = {
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.psy = {
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.name = "main-battery",
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.type = POWER_SUPPLY_TYPE_BATTERY,
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.properties = s3c_adc_main_bat_props,
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.num_properties = ARRAY_SIZE(s3c_adc_main_bat_props),
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.get_property = s3c_adc_bat_get_property,
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.external_power_changed = s3c_adc_bat_ext_power_changed,
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.use_for_apm = 1,
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},
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};
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static void s3c_adc_bat_work(struct work_struct *work)
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{
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struct s3c_adc_bat *bat = &main_bat;
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int is_charged;
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int is_plugged;
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static int was_plugged;
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is_plugged = power_supply_am_i_supplied(&bat->psy);
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bat->cable_plugged = is_plugged;
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if (is_plugged != was_plugged) {
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was_plugged = is_plugged;
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if (is_plugged) {
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if (bat->pdata->enable_charger)
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bat->pdata->enable_charger();
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bat->status = POWER_SUPPLY_STATUS_CHARGING;
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} else {
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if (bat->pdata->disable_charger)
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bat->pdata->disable_charger();
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bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
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}
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} else {
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if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) {
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is_charged = gpio_get_value(
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main_bat.pdata->gpio_charge_finished);
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if (is_charged) {
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if (bat->pdata->disable_charger)
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bat->pdata->disable_charger();
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bat->status = POWER_SUPPLY_STATUS_FULL;
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} else {
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if (bat->pdata->enable_charger)
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bat->pdata->enable_charger();
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bat->status = POWER_SUPPLY_STATUS_CHARGING;
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}
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}
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}
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power_supply_changed(&bat->psy);
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}
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static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id)
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{
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schedule_delayed_work(&bat_work,
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msecs_to_jiffies(JITTER_DELAY));
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return IRQ_HANDLED;
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}
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static int __init s3c_adc_bat_probe(struct platform_device *pdev)
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{
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struct s3c_adc_client *client;
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struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
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int ret;
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client = s3c_adc_register(pdev, NULL, NULL, 0);
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if (IS_ERR(client)) {
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dev_err(&pdev->dev, "cannot register adc\n");
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return PTR_ERR(client);
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}
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platform_set_drvdata(pdev, client);
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main_bat.client = client;
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main_bat.pdata = pdata;
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main_bat.volt_value = -1;
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main_bat.cur_value = -1;
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main_bat.cable_plugged = 0;
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main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING;
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ret = power_supply_register(&pdev->dev, &main_bat.psy);
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if (ret)
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goto err_reg_main;
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if (pdata->backup_volt_mult) {
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backup_bat.client = client;
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backup_bat.pdata = pdev->dev.platform_data;
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backup_bat.volt_value = -1;
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ret = power_supply_register(&pdev->dev, &backup_bat.psy);
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if (ret)
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goto err_reg_backup;
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}
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INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work);
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if (pdata->gpio_charge_finished >= 0) {
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ret = gpio_request(pdata->gpio_charge_finished, "charged");
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if (ret)
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goto err_gpio;
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ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished),
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s3c_adc_bat_charged,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
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"battery charged", NULL);
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if (ret)
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goto err_irq;
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}
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if (pdata->init) {
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ret = pdata->init();
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if (ret)
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goto err_platform;
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}
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dev_info(&pdev->dev, "successfully loaded\n");
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device_init_wakeup(&pdev->dev, 1);
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/* Schedule timer to check current status */
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schedule_delayed_work(&bat_work,
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msecs_to_jiffies(JITTER_DELAY));
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return 0;
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err_platform:
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if (pdata->gpio_charge_finished >= 0)
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free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
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err_irq:
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if (pdata->gpio_charge_finished >= 0)
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gpio_free(pdata->gpio_charge_finished);
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err_gpio:
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if (pdata->backup_volt_mult)
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power_supply_unregister(&backup_bat.psy);
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err_reg_backup:
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power_supply_unregister(&main_bat.psy);
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err_reg_main:
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return ret;
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}
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static int s3c_adc_bat_remove(struct platform_device *pdev)
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{
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struct s3c_adc_client *client = platform_get_drvdata(pdev);
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struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
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power_supply_unregister(&main_bat.psy);
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if (pdata->backup_volt_mult)
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power_supply_unregister(&backup_bat.psy);
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s3c_adc_release(client);
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if (pdata->gpio_charge_finished >= 0) {
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free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
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gpio_free(pdata->gpio_charge_finished);
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}
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cancel_delayed_work(&bat_work);
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if (pdata->exit)
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pdata->exit();
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return 0;
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}
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#ifdef CONFIG_PM
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static int s3c_adc_bat_suspend(struct platform_device *pdev,
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pm_message_t state)
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{
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struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
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if (pdata->gpio_charge_finished >= 0) {
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if (device_may_wakeup(&pdev->dev))
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enable_irq_wake(
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gpio_to_irq(pdata->gpio_charge_finished));
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else {
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disable_irq(gpio_to_irq(pdata->gpio_charge_finished));
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main_bat.pdata->disable_charger();
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}
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}
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return 0;
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}
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static int s3c_adc_bat_resume(struct platform_device *pdev)
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{
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struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
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if (pdata->gpio_charge_finished >= 0) {
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if (device_may_wakeup(&pdev->dev))
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disable_irq_wake(
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gpio_to_irq(pdata->gpio_charge_finished));
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else
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enable_irq(gpio_to_irq(pdata->gpio_charge_finished));
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}
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/* Schedule timer to check current status */
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schedule_delayed_work(&bat_work,
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msecs_to_jiffies(JITTER_DELAY));
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return 0;
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}
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#else
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#define s3c_adc_battery_suspend NULL
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#define s3c_adc_battery_resume NULL
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#endif
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static struct platform_driver s3c_adc_bat_driver = {
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.driver = {
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.name = "s3c-adc-battery",
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},
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.probe = s3c_adc_bat_probe,
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.remove = s3c_adc_bat_remove,
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.suspend = s3c_adc_bat_suspend,
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.resume = s3c_adc_bat_resume,
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};
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static int __init s3c_adc_bat_init(void)
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{
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return platform_driver_register(&s3c_adc_bat_driver);
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}
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module_init(s3c_adc_bat_init);
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|
||||
static void __exit s3c_adc_bat_exit(void)
|
||||
{
|
||||
platform_driver_unregister(&s3c_adc_bat_driver);
|
||||
}
|
||||
module_exit(s3c_adc_bat_exit);
|
||||
|
||||
MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
|
||||
MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controler driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
|
@ -0,0 +1,36 @@
|
|||
#ifndef _S3C_ADC_BATTERY_H
|
||||
#define _S3C_ADC_BATTERY_H
|
||||
|
||||
struct s3c_adc_bat_thresh {
|
||||
int volt; /* mV */
|
||||
int cur; /* mA */
|
||||
int level; /* percent */
|
||||
};
|
||||
|
||||
struct s3c_adc_bat_pdata {
|
||||
int (*init)(void);
|
||||
void (*exit)(void);
|
||||
void (*enable_charger)(void);
|
||||
void (*disable_charger)(void);
|
||||
|
||||
int gpio_charge_finished;
|
||||
|
||||
const struct s3c_adc_bat_thresh *lut_noac;
|
||||
unsigned int lut_noac_cnt;
|
||||
const struct s3c_adc_bat_thresh *lut_acin;
|
||||
unsigned int lut_acin_cnt;
|
||||
|
||||
const unsigned int volt_channel;
|
||||
const unsigned int current_channel;
|
||||
const unsigned int backup_volt_channel;
|
||||
|
||||
const unsigned int volt_mult;
|
||||
const unsigned int current_mult;
|
||||
const unsigned int backup_volt_mult;
|
||||
const unsigned int internal_impedance;
|
||||
|
||||
const unsigned int backup_volt_max;
|
||||
const unsigned int backup_volt_min;
|
||||
};
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue