mirror of https://gitee.com/openkylin/linux.git
448 lines
11 KiB
C
448 lines
11 KiB
C
/*
|
|
* iPAQ h1930/h1940/rx1950 battery controller driver
|
|
* Copyright (c) Vasily Khoruzhick
|
|
* Based on h1940_battery.c by Arnaud Patard
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file COPYING in the main directory of this archive for
|
|
* more details.
|
|
*
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/power_supply.h>
|
|
#include <linux/leds.h>
|
|
#include <linux/gpio.h>
|
|
#include <linux/err.h>
|
|
#include <linux/timer.h>
|
|
#include <linux/jiffies.h>
|
|
#include <linux/s3c_adc_battery.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <plat/adc.h>
|
|
|
|
#define BAT_POLL_INTERVAL 10000 /* ms */
|
|
#define JITTER_DELAY 500 /* ms */
|
|
|
|
struct s3c_adc_bat {
|
|
struct power_supply psy;
|
|
struct s3c_adc_client *client;
|
|
struct s3c_adc_bat_pdata *pdata;
|
|
int volt_value;
|
|
int cur_value;
|
|
unsigned int timestamp;
|
|
int level;
|
|
int status;
|
|
int cable_plugged:1;
|
|
};
|
|
|
|
static struct delayed_work bat_work;
|
|
|
|
static void s3c_adc_bat_ext_power_changed(struct power_supply *psy)
|
|
{
|
|
schedule_delayed_work(&bat_work,
|
|
msecs_to_jiffies(JITTER_DELAY));
|
|
}
|
|
|
|
static int gather_samples(struct s3c_adc_client *client, int num, int channel)
|
|
{
|
|
int value, i;
|
|
|
|
/* default to 1 if nothing is set */
|
|
if (num < 1)
|
|
num = 1;
|
|
|
|
value = 0;
|
|
for (i = 0; i < num; i++)
|
|
value += s3c_adc_read(client, channel);
|
|
value /= num;
|
|
|
|
return value;
|
|
}
|
|
|
|
static enum power_supply_property s3c_adc_backup_bat_props[] = {
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MIN,
|
|
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
|
|
};
|
|
|
|
static int s3c_adc_backup_bat_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
|
|
|
|
if (!bat) {
|
|
dev_err(psy->dev, "%s: no battery infos ?!\n", __func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bat->volt_value < 0 ||
|
|
jiffies_to_msecs(jiffies - bat->timestamp) >
|
|
BAT_POLL_INTERVAL) {
|
|
bat->volt_value = gather_samples(bat->client,
|
|
bat->pdata->backup_volt_samples,
|
|
bat->pdata->backup_volt_channel);
|
|
bat->volt_value *= bat->pdata->backup_volt_mult;
|
|
bat->timestamp = jiffies;
|
|
}
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
val->intval = bat->volt_value;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
|
|
val->intval = bat->pdata->backup_volt_min;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
|
|
val->intval = bat->pdata->backup_volt_max;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static struct s3c_adc_bat backup_bat = {
|
|
.psy = {
|
|
.name = "backup-battery",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = s3c_adc_backup_bat_props,
|
|
.num_properties = ARRAY_SIZE(s3c_adc_backup_bat_props),
|
|
.get_property = s3c_adc_backup_bat_get_property,
|
|
.use_for_apm = 1,
|
|
},
|
|
};
|
|
|
|
static enum power_supply_property s3c_adc_main_bat_props[] = {
|
|
POWER_SUPPLY_PROP_STATUS,
|
|
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN,
|
|
POWER_SUPPLY_PROP_CHARGE_NOW,
|
|
POWER_SUPPLY_PROP_VOLTAGE_NOW,
|
|
POWER_SUPPLY_PROP_CURRENT_NOW,
|
|
};
|
|
|
|
static int calc_full_volt(int volt_val, int cur_val, int impedance)
|
|
{
|
|
return volt_val + cur_val * impedance / 1000;
|
|
}
|
|
|
|
static int charge_finished(struct s3c_adc_bat *bat)
|
|
{
|
|
return bat->pdata->gpio_inverted ?
|
|
!gpio_get_value(bat->pdata->gpio_charge_finished) :
|
|
gpio_get_value(bat->pdata->gpio_charge_finished);
|
|
}
|
|
|
|
static int s3c_adc_bat_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
struct s3c_adc_bat *bat = container_of(psy, struct s3c_adc_bat, psy);
|
|
|
|
int new_level;
|
|
int full_volt;
|
|
const struct s3c_adc_bat_thresh *lut = bat->pdata->lut_noac;
|
|
unsigned int lut_size = bat->pdata->lut_noac_cnt;
|
|
|
|
if (!bat) {
|
|
dev_err(psy->dev, "no battery infos ?!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (bat->volt_value < 0 || bat->cur_value < 0 ||
|
|
jiffies_to_msecs(jiffies - bat->timestamp) >
|
|
BAT_POLL_INTERVAL) {
|
|
bat->volt_value = gather_samples(bat->client,
|
|
bat->pdata->volt_samples,
|
|
bat->pdata->volt_channel) * bat->pdata->volt_mult;
|
|
bat->cur_value = gather_samples(bat->client,
|
|
bat->pdata->current_samples,
|
|
bat->pdata->current_channel) * bat->pdata->current_mult;
|
|
bat->timestamp = jiffies;
|
|
}
|
|
|
|
if (bat->cable_plugged &&
|
|
((bat->pdata->gpio_charge_finished < 0) ||
|
|
!charge_finished(bat))) {
|
|
lut = bat->pdata->lut_acin;
|
|
lut_size = bat->pdata->lut_acin_cnt;
|
|
}
|
|
|
|
new_level = 100000;
|
|
full_volt = calc_full_volt((bat->volt_value / 1000),
|
|
(bat->cur_value / 1000), bat->pdata->internal_impedance);
|
|
|
|
if (full_volt < calc_full_volt(lut->volt, lut->cur,
|
|
bat->pdata->internal_impedance)) {
|
|
lut_size--;
|
|
while (lut_size--) {
|
|
int lut_volt1;
|
|
int lut_volt2;
|
|
|
|
lut_volt1 = calc_full_volt(lut[0].volt, lut[0].cur,
|
|
bat->pdata->internal_impedance);
|
|
lut_volt2 = calc_full_volt(lut[1].volt, lut[1].cur,
|
|
bat->pdata->internal_impedance);
|
|
if (full_volt < lut_volt1 && full_volt >= lut_volt2) {
|
|
new_level = (lut[1].level +
|
|
(lut[0].level - lut[1].level) *
|
|
(full_volt - lut_volt2) /
|
|
(lut_volt1 - lut_volt2)) * 1000;
|
|
break;
|
|
}
|
|
new_level = lut[1].level * 1000;
|
|
lut++;
|
|
}
|
|
}
|
|
|
|
bat->level = new_level;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_STATUS:
|
|
if (bat->pdata->gpio_charge_finished < 0)
|
|
val->intval = bat->level == 100000 ?
|
|
POWER_SUPPLY_STATUS_FULL : bat->status;
|
|
else
|
|
val->intval = bat->status;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
|
|
val->intval = 100000;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_CHARGE_EMPTY_DESIGN:
|
|
val->intval = 0;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_CHARGE_NOW:
|
|
val->intval = bat->level;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
|
|
val->intval = bat->volt_value;
|
|
return 0;
|
|
case POWER_SUPPLY_PROP_CURRENT_NOW:
|
|
val->intval = bat->cur_value;
|
|
return 0;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static struct s3c_adc_bat main_bat = {
|
|
.psy = {
|
|
.name = "main-battery",
|
|
.type = POWER_SUPPLY_TYPE_BATTERY,
|
|
.properties = s3c_adc_main_bat_props,
|
|
.num_properties = ARRAY_SIZE(s3c_adc_main_bat_props),
|
|
.get_property = s3c_adc_bat_get_property,
|
|
.external_power_changed = s3c_adc_bat_ext_power_changed,
|
|
.use_for_apm = 1,
|
|
},
|
|
};
|
|
|
|
static void s3c_adc_bat_work(struct work_struct *work)
|
|
{
|
|
struct s3c_adc_bat *bat = &main_bat;
|
|
int is_charged;
|
|
int is_plugged;
|
|
static int was_plugged;
|
|
|
|
is_plugged = power_supply_am_i_supplied(&bat->psy);
|
|
bat->cable_plugged = is_plugged;
|
|
if (is_plugged != was_plugged) {
|
|
was_plugged = is_plugged;
|
|
if (is_plugged) {
|
|
if (bat->pdata->enable_charger)
|
|
bat->pdata->enable_charger();
|
|
bat->status = POWER_SUPPLY_STATUS_CHARGING;
|
|
} else {
|
|
if (bat->pdata->disable_charger)
|
|
bat->pdata->disable_charger();
|
|
bat->status = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
}
|
|
} else {
|
|
if ((bat->pdata->gpio_charge_finished >= 0) && is_plugged) {
|
|
is_charged = charge_finished(&main_bat);
|
|
if (is_charged) {
|
|
if (bat->pdata->disable_charger)
|
|
bat->pdata->disable_charger();
|
|
bat->status = POWER_SUPPLY_STATUS_FULL;
|
|
} else {
|
|
if (bat->pdata->enable_charger)
|
|
bat->pdata->enable_charger();
|
|
bat->status = POWER_SUPPLY_STATUS_CHARGING;
|
|
}
|
|
}
|
|
}
|
|
|
|
power_supply_changed(&bat->psy);
|
|
}
|
|
|
|
static irqreturn_t s3c_adc_bat_charged(int irq, void *dev_id)
|
|
{
|
|
schedule_delayed_work(&bat_work,
|
|
msecs_to_jiffies(JITTER_DELAY));
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __devinit s3c_adc_bat_probe(struct platform_device *pdev)
|
|
{
|
|
struct s3c_adc_client *client;
|
|
struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
|
|
int ret;
|
|
|
|
client = s3c_adc_register(pdev, NULL, NULL, 0);
|
|
if (IS_ERR(client)) {
|
|
dev_err(&pdev->dev, "cannot register adc\n");
|
|
return PTR_ERR(client);
|
|
}
|
|
|
|
platform_set_drvdata(pdev, client);
|
|
|
|
main_bat.client = client;
|
|
main_bat.pdata = pdata;
|
|
main_bat.volt_value = -1;
|
|
main_bat.cur_value = -1;
|
|
main_bat.cable_plugged = 0;
|
|
main_bat.status = POWER_SUPPLY_STATUS_DISCHARGING;
|
|
|
|
ret = power_supply_register(&pdev->dev, &main_bat.psy);
|
|
if (ret)
|
|
goto err_reg_main;
|
|
if (pdata->backup_volt_mult) {
|
|
backup_bat.client = client;
|
|
backup_bat.pdata = pdev->dev.platform_data;
|
|
backup_bat.volt_value = -1;
|
|
ret = power_supply_register(&pdev->dev, &backup_bat.psy);
|
|
if (ret)
|
|
goto err_reg_backup;
|
|
}
|
|
|
|
INIT_DELAYED_WORK(&bat_work, s3c_adc_bat_work);
|
|
|
|
if (pdata->gpio_charge_finished >= 0) {
|
|
ret = gpio_request(pdata->gpio_charge_finished, "charged");
|
|
if (ret)
|
|
goto err_gpio;
|
|
|
|
ret = request_irq(gpio_to_irq(pdata->gpio_charge_finished),
|
|
s3c_adc_bat_charged,
|
|
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
|
|
"battery charged", NULL);
|
|
if (ret)
|
|
goto err_irq;
|
|
}
|
|
|
|
if (pdata->init) {
|
|
ret = pdata->init();
|
|
if (ret)
|
|
goto err_platform;
|
|
}
|
|
|
|
dev_info(&pdev->dev, "successfully loaded\n");
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
|
|
/* Schedule timer to check current status */
|
|
schedule_delayed_work(&bat_work,
|
|
msecs_to_jiffies(JITTER_DELAY));
|
|
|
|
return 0;
|
|
|
|
err_platform:
|
|
if (pdata->gpio_charge_finished >= 0)
|
|
free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
|
|
err_irq:
|
|
if (pdata->gpio_charge_finished >= 0)
|
|
gpio_free(pdata->gpio_charge_finished);
|
|
err_gpio:
|
|
if (pdata->backup_volt_mult)
|
|
power_supply_unregister(&backup_bat.psy);
|
|
err_reg_backup:
|
|
power_supply_unregister(&main_bat.psy);
|
|
err_reg_main:
|
|
return ret;
|
|
}
|
|
|
|
static int s3c_adc_bat_remove(struct platform_device *pdev)
|
|
{
|
|
struct s3c_adc_client *client = platform_get_drvdata(pdev);
|
|
struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
|
|
|
|
power_supply_unregister(&main_bat.psy);
|
|
if (pdata->backup_volt_mult)
|
|
power_supply_unregister(&backup_bat.psy);
|
|
|
|
s3c_adc_release(client);
|
|
|
|
if (pdata->gpio_charge_finished >= 0) {
|
|
free_irq(gpio_to_irq(pdata->gpio_charge_finished), NULL);
|
|
gpio_free(pdata->gpio_charge_finished);
|
|
}
|
|
|
|
cancel_delayed_work(&bat_work);
|
|
|
|
if (pdata->exit)
|
|
pdata->exit();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int s3c_adc_bat_suspend(struct platform_device *pdev,
|
|
pm_message_t state)
|
|
{
|
|
struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
|
|
|
|
if (pdata->gpio_charge_finished >= 0) {
|
|
if (device_may_wakeup(&pdev->dev))
|
|
enable_irq_wake(
|
|
gpio_to_irq(pdata->gpio_charge_finished));
|
|
else {
|
|
disable_irq(gpio_to_irq(pdata->gpio_charge_finished));
|
|
main_bat.pdata->disable_charger();
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int s3c_adc_bat_resume(struct platform_device *pdev)
|
|
{
|
|
struct s3c_adc_bat_pdata *pdata = pdev->dev.platform_data;
|
|
|
|
if (pdata->gpio_charge_finished >= 0) {
|
|
if (device_may_wakeup(&pdev->dev))
|
|
disable_irq_wake(
|
|
gpio_to_irq(pdata->gpio_charge_finished));
|
|
else
|
|
enable_irq(gpio_to_irq(pdata->gpio_charge_finished));
|
|
}
|
|
|
|
/* Schedule timer to check current status */
|
|
schedule_delayed_work(&bat_work,
|
|
msecs_to_jiffies(JITTER_DELAY));
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define s3c_adc_bat_suspend NULL
|
|
#define s3c_adc_bat_resume NULL
|
|
#endif
|
|
|
|
static struct platform_driver s3c_adc_bat_driver = {
|
|
.driver = {
|
|
.name = "s3c-adc-battery",
|
|
},
|
|
.probe = s3c_adc_bat_probe,
|
|
.remove = s3c_adc_bat_remove,
|
|
.suspend = s3c_adc_bat_suspend,
|
|
.resume = s3c_adc_bat_resume,
|
|
};
|
|
|
|
module_platform_driver(s3c_adc_bat_driver);
|
|
|
|
MODULE_AUTHOR("Vasily Khoruzhick <anarsoul@gmail.com>");
|
|
MODULE_DESCRIPTION("iPAQ H1930/H1940/RX1950 battery controller driver");
|
|
MODULE_LICENSE("GPL");
|