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Cleanup battery driver 

SVN-Revision: 19505
owl
Lars-Peter Clausen 2010-02-03 16:08:01 +00:00
parent 27a0d8478d
commit 4faa1ab58b
2 changed files with 220 additions and 204 deletions
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414
target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c
View File

@ -1,11 +1,13 @@
/* /*
* Battery measurement code for Ingenic JZ SOC. * Battery measurement code for Ingenic JZ SOC.
* *
* Copyright (C) 2009 Jiejing Zhang <kzjeef@gmail.com>
* Copyright (C) 2010, Lars-Peter Clausen <lars@metafoo.de>
*
* based on tosa_battery.c * based on tosa_battery.c
* *
* Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com> * Copyright (C) 2008 Marek Vasut <marek.vasut@gmail.com>
* Copyright (C) 2009 Jiejing Zhang <kzjeef@gmail.com> *
*
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as * it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation. * published by the Free Software Foundation.
@ -19,50 +21,56 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/gpio.h> #include <linux/gpio.h>
#include <linux/interrupt.h>
#include <linux/power/jz4740-battery.h> #include <linux/power/jz4740-battery.h>
#include <linux/jz4740-adc.h> #include <linux/jz4740-adc.h>
struct jz_battery_info { struct jz_battery {
struct power_supply bat; struct jz_battery_platform_data *pdata;
int bat_status;
struct jz_batt_info *pdata; int charge_irq;
struct mutex work_lock;
struct workqueue_struct *monitor_wqueue; int status;
struct delayed_work bat_work; long voltage;
struct power_supply battery;
struct delayed_work work;
}; };
#define ps_to_jz_battery(x) container_of((x), struct jz_battery_info, bat); static inline struct jz_battery *psy_to_jz_battery(struct power_supply *psy)
/*********************************************************************
* Battery properties
*********************************************************************/
static long jz_read_bat(struct power_supply *psy)
{ {
struct jz_battery_info *bat_info = ps_to_jz_battery(psy); return container_of(psy, struct jz_battery, battery);
}
static long jz_battery_read_voltage(struct jz_battery *jz_battery)
{
struct device *adc = jz_battery->battery.dev->parent->parent;
enum jz_adc_battery_scale scale; enum jz_adc_battery_scale scale;
if (bat_info->pdata->max_voltag > 2500000) if (jz_battery->pdata->info.voltage_max_design > 2500000)
scale = JZ_ADC_BATTERY_SCALE_7V5; scale = JZ_ADC_BATTERY_SCALE_7V5;
else else
scale = JZ_ADC_BATTERY_SCALE_2V5; scale = JZ_ADC_BATTERY_SCALE_2V5;
return jz4740_adc_read_battery_voltage(psy->dev->parent->parent, scale); return jz4740_adc_read_battery_voltage(adc, scale);
} }
static int jz_bat_get_capacity(struct power_supply *psy) static int jz_battery_get_capacity(struct power_supply *psy)
{ {
struct jz_battery *jz_battery = psy_to_jz_battery(psy);
struct power_supply_info *info = &jz_battery->pdata->info;
long voltage;
int ret; int ret;
struct jz_battery_info *bat_info = ps_to_jz_battery(psy); int voltage_span;
ret = jz_read_bat(psy); voltage = jz_battery_read_voltage(jz_battery);
if (ret < 0) if (voltage < 0)
return ret; return voltage;
ret = (ret - bat_info->pdata->min_voltag) * 100 voltage_span = info->voltage_max_design - info->voltage_min_design;
/ (bat_info->pdata->max_voltag - bat_info->pdata->min_voltag); ret = ((voltage - info->voltage_min_design) * 100) / voltage_span;
if (ret > 100) if (ret > 100)
ret = 100; ret = 100;
@ -72,46 +80,41 @@ static int jz_bat_get_capacity(struct power_supply *psy)
return ret; return ret;
} }
static int jz_bat_get_property(struct power_supply *psy, static int jz_battery_get_property(struct power_supply *psy,
enum power_supply_property psp, enum power_supply_property psp,
union power_supply_propval *val) union power_supply_propval *val)
{ {
struct jz_battery_info *bat_info = ps_to_jz_battery(psy) struct jz_battery *jz_battery = psy_to_jz_battery(psy);
struct power_supply_info *info = &jz_battery->pdata->info;
long voltage;
switch (psp) { switch (psp) {
case POWER_SUPPLY_PROP_STATUS: case POWER_SUPPLY_PROP_STATUS:
val->intval = bat_info->bat_status; val->intval = jz_battery->status;
break; break;
case POWER_SUPPLY_PROP_TECHNOLOGY: case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = bat_info->pdata->batt_tech; val->intval = jz_battery->pdata->info.technology;
break; break;
case POWER_SUPPLY_PROP_HEALTH: case POWER_SUPPLY_PROP_HEALTH:
if(jz_read_bat(psy) < bat_info->pdata->min_voltag) { voltage = jz_battery_read_voltage(jz_battery);
dev_dbg(psy->dev, "%s: battery is dead," if (voltage < info->voltage_min_design)
"voltage too low!\n", __func__);
val->intval = POWER_SUPPLY_HEALTH_DEAD; val->intval = POWER_SUPPLY_HEALTH_DEAD;
} else { else
dev_dbg(psy->dev, "%s: battery is good,"
"voltage normal.\n", __func__);
val->intval = POWER_SUPPLY_HEALTH_GOOD; val->intval = POWER_SUPPLY_HEALTH_GOOD;
}
break; break;
case POWER_SUPPLY_PROP_CAPACITY: case POWER_SUPPLY_PROP_CAPACITY:
val->intval = jz_bat_get_capacity(psy); val->intval = jz_battery_get_capacity(psy);
dev_dbg(psy->dev, "%s: battery_capacity = %d\n",
__func__, val->intval);
break; break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_VOLTAGE_NOW:
val->intval = jz_read_bat(psy); val->intval = jz_battery_read_voltage(jz_battery);
if (val->intval < 0) if (val->intval < 0)
return val->intval; return val->intval;
break; break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = bat_info->pdata->max_voltag; val->intval = info->voltage_max_design;
break; break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = bat_info->pdata->min_voltag; val->intval = info->voltage_min_design;
break; break;
case POWER_SUPPLY_PROP_PRESENT: case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1; val->intval = 1;
@ -122,210 +125,225 @@ static int jz_bat_get_property(struct power_supply *psy,
return 0; return 0;
} }
static void jz_bat_external_power_changed(struct power_supply *psy) static void jz_battery_external_power_changed(struct power_supply *psy)
{ {
struct jz_battery_info *bat_info = ps_to_jz_battery(psy); struct jz_battery *jz_battery = psy_to_jz_battery(psy);
cancel_delayed_work(&bat_info->bat_work); cancel_delayed_work(&jz_battery->work);
queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ / 8); schedule_delayed_work(&jz_battery->work, 0);
} }
static char *status_text[] = { static irqreturn_t jz_battery_charge_irq(int irq, void *data)
[POWER_SUPPLY_STATUS_UNKNOWN] = "Unknown",
[POWER_SUPPLY_STATUS_CHARGING] = "Charging",
[POWER_SUPPLY_STATUS_DISCHARGING] = "Discharging",
[POWER_SUPPLY_STATUS_NOT_CHARGING] = "Not charging",
};
static void jz_bat_update(struct power_supply *psy)
{ {
struct jz_battery_info *bat_info = ps_to_jz_battery(psy); struct jz_battery *jz_battery = data;
int old_status = bat_info->bat_status;
static unsigned long old_batt_vol = 0;
unsigned long batt_vol = jz_read_bat(psy);
mutex_lock(&bat_info->work_lock);
if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) { cancel_delayed_work(&jz_battery->work);
if(!gpio_get_value(bat_info->pdata->charg_stat_gpio)) schedule_delayed_work(&jz_battery->work, 0);
bat_info->bat_status = POWER_SUPPLY_STATUS_CHARGING;
return IRQ_HANDLED;
}
static void jz_battery_update(struct jz_battery *jz_battery)
{
int status;
long voltage;
long voltage_difference;
bool has_changed = 0;
if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
int is_charging;
is_charging = gpio_get_value(jz_battery->pdata->gpio_charge);
is_charging ^= jz_battery->pdata->gpio_charge_active_low;
if (is_charging)
status = POWER_SUPPLY_STATUS_CHARGING;
else else
bat_info->bat_status = POWER_SUPPLY_STATUS_NOT_CHARGING; status = POWER_SUPPLY_STATUS_NOT_CHARGING;
dev_dbg(psy->dev, "%s: battery status=%s\n",
__func__, status_text[bat_info->bat_status]);
if (old_status != bat_info->bat_status) {
dev_dbg(psy->dev, "%s %s -> %s\n",
psy->name,
status_text[old_status],
status_text[bat_info->bat_status]);
power_supply_changed(psy); if (status != jz_battery->status) {
jz_battery->status = status;
has_changed = 1;
} }
} }
if (old_batt_vol - batt_vol > 50000) { voltage = jz_battery_read_voltage(jz_battery);
dev_dbg(psy->dev, "voltage change : %ld -> %ld\n", voltage_difference = voltage - jz_battery->voltage;
old_batt_vol, batt_vol); if (voltage_difference > 50000 || voltage_difference < 50000) {
power_supply_changed(psy); jz_battery->voltage = voltage;
old_batt_vol = batt_vol; has_changed = 1;
} }
if (has_changed)
mutex_unlock(&bat_info->work_lock); power_supply_changed(&jz_battery->battery);
} }
static enum power_supply_property jz_bat_main_props[] = { static enum power_supply_property jz_battery_properties[] = {
POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_CAPACITY, /* in percents! */ POWER_SUPPLY_PROP_CAPACITY,
POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_VOLTAGE_MAX, POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_PRESENT,
}; };
struct power_supply bat_ps = { static void jz_battery_work(struct work_struct *work)
.name = "battery",
.type = POWER_SUPPLY_TYPE_BATTERY,
.properties = jz_bat_main_props,
.num_properties = ARRAY_SIZE(jz_bat_main_props),
.get_property = jz_bat_get_property,
.external_power_changed = jz_bat_external_power_changed,
.use_for_apm = 1,
};
static void jz_bat_work(struct work_struct *work)
{ {
/* query interval too small will increase system workload*/ /* Too small interval will increase system workload */
const int interval = HZ * 30; const int interval = HZ * 30;
struct jz_battery_info *bat_info = container_of(work,struct jz_battery_info, bat_work.work); struct jz_battery *jz_battery = container_of(work, struct jz_battery,
work.work);
jz_bat_update(&bat_info->bat); jz_battery_update(jz_battery);
queue_delayed_work(bat_info->monitor_wqueue, schedule_delayed_work(&jz_battery->work, interval);
&bat_info->bat_work, interval);
} }
#ifdef CONFIG_PM static int jz_battery_probe(struct platform_device *pdev)
static int jz_bat_suspend(struct platform_device *pdev, pm_message_t state)
{ {
struct jz_battery_info *bat_info = platform_get_drvdata(pdev); int ret = 0;
struct jz_battery_platform_data *pdata = pdev->dev.platform_data;
bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN; struct jz_battery *jz_battery;
struct power_supply *battery;
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "No platform data\n");
return -EINVAL;
}
jz_battery = kzalloc(sizeof(*jz_battery), GFP_KERNEL);
if (!jz_battery) {
dev_err(&pdev->dev, "Failed to allocate driver structure\n");
return -ENOMEM;
}
battery = &jz_battery->battery;
battery->name = pdata->info.name;
battery->type = POWER_SUPPLY_TYPE_BATTERY;
battery->properties = jz_battery_properties;
battery->num_properties = ARRAY_SIZE(jz_battery_properties);
battery->get_property = jz_battery_get_property;
battery->external_power_changed = jz_battery_external_power_changed;
battery->use_for_apm = 1;
jz_battery->pdata = pdata;
INIT_DELAYED_WORK(&jz_battery->work, jz_battery_work);
if (gpio_is_valid(pdata->gpio_charge)) {
ret = gpio_request(pdata->gpio_charge, dev_name(&pdev->dev));
if (ret) {
dev_err(&pdev->dev, "charger state gpio request failed.\n");
goto err_free;
}
ret = gpio_direction_input(pdata->gpio_charge);
if (ret) {
dev_err(&pdev->dev, "charger state gpio set direction failed.\n");
goto err_free_gpio;
}
jz_battery->charge_irq = gpio_to_irq(pdata->gpio_charge);
if (jz_battery->charge_irq >= 0) {
ret = request_irq(jz_battery->charge_irq,
jz_battery_charge_irq,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
dev_name(&pdev->dev), jz_battery);
if (ret) {
dev_err(&pdev->dev, "Failed to request charge irq: %d\n", ret);
goto err_free_gpio;
}
}
} else {
jz_battery->charge_irq = -1;
}
ret = power_supply_register(&pdev->dev, &jz_battery->battery);
if (ret) {
dev_err(&pdev->dev, "power supply battery register failed.\n");
goto err_free_irq;
}
platform_set_drvdata(pdev, jz_battery);
schedule_delayed_work(&jz_battery->work, 0);
return 0;
err_free_irq:
if (jz_battery->charge_irq >= 0)
free_irq(jz_battery->charge_irq, jz_battery);
err_free_gpio:
if (gpio_is_valid(pdata->gpio_charge))
gpio_free(jz_battery->pdata->gpio_charge);
err_free:
kfree(jz_battery);
return ret;
}
static int jz_battery_remove(struct platform_device *pdev)
{
struct jz_battery *jz_battery = platform_get_drvdata(pdev);
cancel_delayed_work_sync(&jz_battery->work);
if (gpio_is_valid(jz_battery->pdata->gpio_charge)) {
if (jz_battery->charge_irq >= 0)
free_irq(jz_battery->charge_irq, jz_battery);
gpio_free(jz_battery->pdata->gpio_charge);
}
power_supply_unregister(&jz_battery->battery);
return 0; return 0;
} }
static int jz_bat_resume(struct platform_device *pdev) #ifdef CONFIG_PM
static int jz_battery_suspend(struct platform_device *pdev, pm_message_t state)
{ {
struct jz_battery_info *bat_info = platform_get_drvdata(pdev); struct jz_battery *jz_battery = platform_get_drvdata(pdev);
bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN; cancel_delayed_work_sync(&jz_battery->work);
jz_battery->status = POWER_SUPPLY_STATUS_UNKNOWN;
cancel_delayed_work(&bat_info->bat_work); return 0;
queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ/10); }
static int jz_battery_resume(struct platform_device *pdev)
{
struct jz_battery *jz_battery = platform_get_drvdata(pdev);
schedule_delayed_work(&jz_battery->work, 0);
return 0; return 0;
} }
#else #else
#define jz_bat_suspend NULL #define jz_battery_suspend NULL
#define jz_bat_resume NULL #define jz_battery_resume NULL
#endif #endif
static int jz_bat_probe(struct platform_device *pdev) static struct platform_driver jz_battery_driver = {
{ .probe = jz_battery_probe,
int ret = 0; .remove = __devexit_p(jz_battery_remove),
struct jz_battery_info *bat_info; .suspend = jz_battery_suspend,
.resume = jz_battery_resume,
if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "Please set battery info\n");
return -EINVAL;
}
bat_info = kzalloc(sizeof(struct jz_battery_info), GFP_KERNEL);
if (!bat_info) {
return -ENOMEM;
}
platform_set_drvdata(pdev, bat_info);
bat_info->pdata = pdev->dev.platform_data;
bat_info->bat = bat_ps;
mutex_init(&bat_info->work_lock);
INIT_DELAYED_WORK(&bat_info->bat_work, jz_bat_work);
if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) {
ret = gpio_request(bat_info->pdata->charg_stat_gpio, "CHARG STAT");
if (ret) {
dev_err(&pdev->dev, "charger state gpio request failed.\n");
goto err_charg_gpio_request;
}
ret = gpio_direction_input(bat_info->pdata->charg_stat_gpio);
if (ret) {
dev_err(&pdev->dev, "charger state gpio set direction failed.\n");
goto err_charg_gpio_direction;
}
ret = power_supply_register(&pdev->dev, &bat_info->bat);
if (ret) {
dev_err(&pdev->dev, "power supply battery register failed.\n");
goto err_power_register_bat;
} else {
bat_info->monitor_wqueue = create_singlethread_workqueue("jz_battery");
if (!bat_info->monitor_wqueue) {
return -ESRCH;
}
queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ * 1);
}
}
printk(KERN_INFO "jz_bat init success.\n");
return ret;
err_power_register_bat:
err_charg_gpio_direction:
gpio_free(bat_info->pdata->charg_stat_gpio);
err_charg_gpio_request:
kfree(bat_info);
return ret;
}
static int jz_bat_remove(struct platform_device *pdev)
{
struct jz_battery_info *bat_info = platform_get_drvdata(pdev);
if (bat_info->pdata) {
if (gpio_is_valid(bat_info->pdata->charg_stat_gpio))
gpio_free(bat_info->pdata->charg_stat_gpio);
}
power_supply_unregister(&bat_ps);
return 0;
}
static struct platform_driver jz_bat_driver = {
.probe = jz_bat_probe,
.remove = __devexit_p(jz_bat_remove),
.suspend = jz_bat_suspend,
.resume = jz_bat_resume,
.driver = { .driver = {
.name = "jz4740-battery", .name = "jz4740-battery",
.owner = THIS_MODULE, .owner = THIS_MODULE,
}, },
}; };
static int __init jz_bat_init(void) static int __init jz_battery_init(void)
{ {
return platform_driver_register(&jz_bat_driver); return platform_driver_register(&jz_battery_driver);
} }
module_init(jz_bat_init); module_init(jz_battery_init);
static void __exit jz_bat_exit(void) static void __exit jz_battery_exit(void)
{ {
platform_driver_unregister(&jz_bat_driver); platform_driver_unregister(&jz_battery_driver);
} }
module_exit(jz_bat_exit); module_exit(jz_battery_exit);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jiejing Zhang <kzjeef@gmail.com>"); MODULE_AUTHOR("Jiejing Zhang <kzjeef@gmail.com>");

10
target/linux/xburst/files-2.6.32/include/linux/power/jz4740-battery.h
View File

@ -15,12 +15,10 @@
#ifndef __JZ4740_BATTERY_H #ifndef __JZ4740_BATTERY_H
#define __JZ4740_BATTERY_H #define __JZ4740_BATTERY_H
struct jz_batt_info { struct jz_battery_platform_data {
int charg_stat_gpio; /* GPIO port of Charger state */ struct power_supply_info info;
int gpio_charge; /* GPIO port of Charger state */
int min_voltag; /* Mininal battery voltage in uV */ int gpio_charge_active_low;
int max_voltag; /* Maximum battery voltage in uV */
int batt_tech; /* Battery technology */
}; };
#endif #endif