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-rw-r--r--recipes/linux/linux-2.6.35/rx1950/0007-Add-s3c-adc-battery-driver.patch530
1 files changed, 530 insertions, 0 deletions
diff --git a/recipes/linux/linux-2.6.35/rx1950/0007-Add-s3c-adc-battery-driver.patch b/recipes/linux/linux-2.6.35/rx1950/0007-Add-s3c-adc-battery-driver.patch
new file mode 100644
index 0000000000..f0b763afda
--- /dev/null
+++ b/recipes/linux/linux-2.6.35/rx1950/0007-Add-s3c-adc-battery-driver.patch
@@ -0,0 +1,530 @@
+From 874bc0df0eeddae98517190375e9e5697826f1a9 Mon Sep 17 00:00:00 2001
+From: Vasily Khoruzhick <anarsoul@gmail.com>
+Date: Wed, 16 Jun 2010 22:35:52 +0300
+Subject: [PATCH v5 3/4] 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>
+---
+ drivers/power/Kconfig | 6 +
+ drivers/power/Makefile | 1 +
+ drivers/power/s3c_adc_battery.c | 433 +++++++++++++++++++++++++++++++++++++++
+ include/linux/s3c_adc_battery.h | 36 ++++
+ 4 files changed, 476 insertions(+), 0 deletions(-)
+ create mode 100644 drivers/power/s3c_adc_battery.c
+ create mode 100644 include/linux/s3c_adc_battery.h
+
+diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
+index 8e9ba17..645baa5 100644
+--- a/drivers/power/Kconfig
++++ b/drivers/power/Kconfig
+@@ -136,6 +136,12 @@ config BATTERY_Z2
+ help
+ Say Y to include support for the battery on the Zipit Z2.
+
++config BATTERY_S3C_ADC
++ tristate "Battery driver for Samsung ADC based monitoring"
++ depends on S3C_ADC
++ help
++ Say Y here to enable support for iPAQ h1930/h1940/rx1950 battery
++
+ config CHARGER_PCF50633
+ tristate "NXP PCF50633 MBC"
+ depends on MFD_PCF50633
+diff --git a/drivers/power/Makefile b/drivers/power/Makefile
+index 0005080..166bcbf 100644
+--- a/drivers/power/Makefile
++++ b/drivers/power/Makefile
+@@ -33,4 +33,5 @@ obj-$(CONFIG_BATTERY_BQ27x00) += bq27x00_battery.o
+ obj-$(CONFIG_BATTERY_DA9030) += da9030_battery.o
+ obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
+ obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
++obj-$(CONFIG_BATTERY_S3C_ADC) += s3c_adc_battery.o
+ obj-$(CONFIG_CHARGER_PCF50633) += pcf50633-charger.o
+diff --git a/drivers/power/s3c_adc_battery.c b/drivers/power/s3c_adc_battery.c
+new file mode 100644
+index 0000000..d7a0771
+--- /dev/null
++++ b/drivers/power/s3c_adc_battery.c
+@@ -0,0 +1,433 @@
++/*
++ * iPAQ h1930/h1940/rx1950 battery controler 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 <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 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 = s3c_adc_read(bat->client,
++ 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 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 = s3c_adc_read(bat->client,
++ bat->pdata->volt_channel) * bat->pdata->volt_mult;
++ bat->cur_value = s3c_adc_read(bat->client,
++ bat->pdata->current_channel) * bat->pdata->current_mult;
++ bat->timestamp = jiffies;
++ }
++
++ if (bat->cable_plugged &&
++ ((bat->pdata->gpio_charge_finished < 0) ||
++ !gpio_get_value(bat->pdata->gpio_charge_finished))) {
++ 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 = gpio_get_value(
++ main_bat.pdata->gpio_charge_finished);
++ 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 __init 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_battery_suspend NULL
++#define s3c_adc_battery_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,
++};
++
++
++static int __init s3c_adc_bat_init(void)
++{
++ return platform_driver_register(&s3c_adc_bat_driver);
++}
++
++static void __exit s3c_adc_bat_exit(void)
++{
++ platform_driver_unregister(&s3c_adc_bat_driver);
++}
++
++module_init(s3c_adc_bat_init);
++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");
+diff --git a/include/linux/s3c_adc_battery.h b/include/linux/s3c_adc_battery.h
+new file mode 100644
+index 0000000..dbce22f
+--- /dev/null
++++ b/include/linux/s3c_adc_battery.h
+@@ -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
+--
+1.7.1.1
+
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