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authorlars <lars@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-01-11 04:44:45 +0000
committerlars <lars@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-01-11 04:44:45 +0000
commit809c03fe4c0f90c640b26e6a2792553b592c68f2 (patch)
tree9f8851bc32dbcd5a39bcb13ecf294dff3902aeab /target/linux/xburst/files-2.6.32/drivers/power
parent19682a7752733bc6a45026d69c27575b9b7755fd (diff)
Merge xburst target.
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19098 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/xburst/files-2.6.32/drivers/power')
-rw-r--r--target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c471
1 files changed, 471 insertions, 0 deletions
diff --git a/target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c b/target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c
new file mode 100644
index 000000000..fe03d8076
--- /dev/null
+++ b/target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c
@@ -0,0 +1,471 @@
+/*
+ * Battery measurement code for Ingenic JZ SOC.
+ *
+ * based on tosa_battery.c
+ *
+ * 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
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/power_supply.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+
+#include <linux/power/jz4740-battery.h>
+#include <linux/jz4740-adc.h>
+
+struct jz_battery_info {
+ struct power_supply usb;
+ struct power_supply bat;
+ struct power_supply ac;
+ int bat_status;
+ struct jz_batt_info *pdata;
+ struct mutex work_lock;
+ struct workqueue_struct *monitor_wqueue;
+ struct delayed_work bat_work;
+};
+
+#define ps_to_jz_battery(x) container_of((x), struct jz_battery_info, bat);
+
+/*********************************************************************
+ * Power
+ *********************************************************************/
+
+
+static int jz_get_power_prop(struct jz_battery_info *bat_info,
+ struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int gpio;
+
+ if (bat_info == 0 || bat_info->pdata == 0)
+ return -EINVAL;
+ gpio = (psy->type == POWER_SUPPLY_TYPE_MAINS) ?
+ bat_info->pdata->dc_dect_gpio :
+ bat_info->pdata->usb_dect_gpio;
+ if (!gpio_is_valid(gpio))
+ return -EINVAL;
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = !gpio_get_value(gpio);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int jz_usb_get_power_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct jz_battery_info *bat_info = container_of(psy, struct jz_battery_info, usb);
+ return jz_get_power_prop(bat_info, psy, psp, val);
+}
+
+static int jz_ac_get_power_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct jz_battery_info *bat_info = container_of(psy, struct jz_battery_info, ac);
+ return jz_get_power_prop(bat_info, psy, psp, val);
+}
+
+
+static enum power_supply_property jz_power_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static struct power_supply jz_ac = {
+ .name = "ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = jz_power_props,
+ .num_properties = ARRAY_SIZE(jz_power_props),
+ .get_property = jz_ac_get_power_prop,
+};
+
+static struct power_supply jz_usb = {
+ .name = "usb",
+ .type = POWER_SUPPLY_TYPE_USB,
+ .properties = jz_power_props,
+ .num_properties = ARRAY_SIZE(jz_power_props),
+ .get_property = jz_usb_get_power_prop,
+};
+
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+
+static long jz_read_bat(struct power_supply *psy)
+{
+ struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
+ enum jz_adc_battery_scale scale;
+
+ if (bat_info->pdata->max_voltag > 2500000)
+ scale = JZ_ADC_BATTERY_SCALE_7V5;
+ else
+ scale = JZ_ADC_BATTERY_SCALE_2V5;
+
+ return jz4740_adc_read_battery_voltage(psy->dev->parent->parent, scale);
+}
+
+static int jz_bat_get_capacity(struct power_supply *psy)
+{
+ int ret;
+ struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
+
+ ret = jz_read_bat(psy);
+
+ if (ret < 0)
+ return ret;
+
+ ret = (ret - bat_info->pdata->min_voltag) * 100
+ / (bat_info->pdata->max_voltag - bat_info->pdata->min_voltag);
+
+ if (ret > 100)
+ ret = 100;
+ else if (ret < 0)
+ ret = 0;
+
+ return ret;
+}
+
+static int jz_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct jz_battery_info *bat_info = ps_to_jz_battery(psy)
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = bat_info->bat_status;
+ break;
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ val->intval = bat_info->pdata->batt_tech;
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ if(jz_read_bat(psy) < bat_info->pdata->min_voltag) {
+ dev_dbg(psy->dev, "%s: battery is dead,"
+ "voltage too low!\n", __func__);
+ val->intval = POWER_SUPPLY_HEALTH_DEAD;
+ } else {
+ dev_dbg(psy->dev, "%s: battery is good,"
+ "voltage normal.\n", __func__);
+ val->intval = POWER_SUPPLY_HEALTH_GOOD;
+ }
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = jz_bat_get_capacity(psy);
+ dev_dbg(psy->dev, "%s: battery_capacity = %d\n",
+ __func__, val->intval);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = jz_read_bat(psy);
+ if (val->intval < 0)
+ return val->intval;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX:
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = bat_info->pdata->max_voltag;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
+ val->intval = bat_info->pdata->min_voltag;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void jz_bat_external_power_changed(struct power_supply *psy)
+{
+ struct jz_battery_info *bat_info = ps_to_jz_battery(psy);
+
+ cancel_delayed_work(&bat_info->bat_work);
+ queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ / 8);
+}
+
+static char *status_text[] = {
+ [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);
+
+ 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)) {
+ if(!gpio_get_value(bat_info->pdata->charg_stat_gpio))
+ bat_info->bat_status = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ bat_info->bat_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 (old_batt_vol - batt_vol > 50000) {
+ dev_dbg(psy->dev, "voltage change : %ld -> %ld\n",
+ old_batt_vol, batt_vol);
+ power_supply_changed(psy);
+ old_batt_vol = batt_vol;
+ }
+
+ mutex_unlock(&bat_info->work_lock);
+}
+
+static enum power_supply_property jz_bat_main_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CAPACITY, /* in percents! */
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
+ POWER_SUPPLY_PROP_PRESENT,
+};
+
+struct power_supply bat_ps = {
+ .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*/
+ const int interval = HZ * 30;
+ struct jz_battery_info *bat_info = container_of(work,struct jz_battery_info, bat_work.work);
+
+ jz_bat_update(&bat_info->bat);
+ queue_delayed_work(bat_info->monitor_wqueue,
+ &bat_info->bat_work, interval);
+}
+
+#ifdef CONFIG_PM
+static int jz_bat_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct jz_battery_info *bat_info = platform_get_drvdata(pdev);
+
+ bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ return 0;
+}
+
+static int jz_bat_resume(struct platform_device *pdev)
+{
+ struct jz_battery_info *bat_info = platform_get_drvdata(pdev);
+
+ bat_info->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
+
+ cancel_delayed_work(&bat_info->bat_work);
+ queue_delayed_work(bat_info->monitor_wqueue, &bat_info->bat_work, HZ/10);
+
+ return 0;
+}
+#else
+#define jz_bat_suspend NULL
+#define jz_bat_resume NULL
+#endif
+
+static int jz_bat_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct jz_battery_info *bat_info;
+
+ bat_info = kzalloc(sizeof(struct jz_battery_info), GFP_KERNEL);
+
+ if (!bat_info) {
+ return -ENOMEM;
+ }
+
+ if (!pdev->dev.platform_data) {
+ dev_err(&pdev->dev, "Please set battery info\n");
+ ret = -EINVAL;
+ goto err_platform_data;
+ }
+ platform_set_drvdata(pdev, bat_info);
+ bat_info->pdata = pdev->dev.platform_data;
+ bat_info->bat = bat_ps;
+ bat_info->usb = jz_usb;
+ bat_info->ac = jz_ac;
+ mutex_init(&bat_info->work_lock);
+ INIT_DELAYED_WORK(&bat_info->bat_work, jz_bat_work);
+
+ if (gpio_is_valid(bat_info->pdata->dc_dect_gpio)) {
+ ret = gpio_request(bat_info->pdata->dc_dect_gpio, "AC/DC DECT");
+ if (ret) {
+ dev_err(&pdev->dev, "ac/dc dect gpio request failed.\n");
+
+ goto err_dc_gpio_request;
+ }
+ ret = gpio_direction_input(bat_info->pdata->dc_dect_gpio);
+ if (ret) {
+ dev_err(&pdev->dev, "ac/dc dect gpio direction failed.\n");
+
+ goto err_dc_gpio_direction;
+ }
+ }
+
+ if (gpio_is_valid(bat_info->pdata->usb_dect_gpio)) {
+ ret = gpio_request(bat_info->pdata->usb_dect_gpio, "USB DECT");
+ if (ret) {
+ dev_err(&pdev->dev, "usb dect gpio request failed.\n");
+
+ goto err_usb_gpio_request;
+ }
+ ret = gpio_direction_input(bat_info->pdata->usb_dect_gpio);
+ if (ret) {
+ dev_err(&pdev->dev, "usb dect gpio set direction failed.\n");
+ goto err_usb_gpio_direction;
+ }
+
+ jz_gpio_disable_pullup(bat_info->pdata->usb_dect_gpio);
+ /* TODO: Use generic gpio is better */
+ }
+
+ 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;
+ }
+ }
+
+ if (gpio_is_valid(bat_info->pdata->dc_dect_gpio)) {
+ ret = power_supply_register(&pdev->dev, &bat_info->ac);
+ if (ret) {
+ dev_err(&pdev->dev, "power supply ac/dc register failed.\n");
+ goto err_power_register_ac;
+ }
+ }
+
+ if (gpio_is_valid(bat_info->pdata->usb_dect_gpio)) {
+ ret = power_supply_register(&pdev->dev, &bat_info->usb);
+ if (ret) {
+ dev_err(&pdev->dev, "power supply usb register failed.\n");
+ goto err_power_register_usb;
+ }
+ }
+
+ if (gpio_is_valid(bat_info->pdata->charg_stat_gpio)) {
+ 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:
+ power_supply_unregister(&bat_info->usb);
+err_power_register_usb:
+ power_supply_unregister(&bat_info->ac);
+err_power_register_ac:
+err_charg_gpio_direction:
+ gpio_free(bat_info->pdata->charg_stat_gpio);
+err_charg_gpio_request:
+err_usb_gpio_direction:
+ gpio_free(bat_info->pdata->usb_dect_gpio);
+err_usb_gpio_request:
+err_dc_gpio_direction:
+ gpio_free(bat_info->pdata->dc_dect_gpio);
+err_dc_gpio_request:
+err_platform_data:
+ 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->dc_dect_gpio))
+ gpio_free(bat_info->pdata->dc_dect_gpio);
+ if (gpio_is_valid(bat_info->pdata->usb_dect_gpio))
+ gpio_free(bat_info->pdata->usb_dect_gpio);
+ if (gpio_is_valid(bat_info->pdata->charg_stat_gpio))
+ gpio_free(bat_info->pdata->charg_stat_gpio);
+ }
+
+ power_supply_unregister(&bat_ps);
+ power_supply_unregister(&jz_ac);
+ power_supply_unregister(&jz_usb);
+
+ 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 = {
+ .name = "jz4740-battery",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init jz_bat_init(void)
+{
+ return platform_driver_register(&jz_bat_driver);
+}
+module_init(jz_bat_init);
+
+static void __exit jz_bat_exit(void)
+{
+ platform_driver_unregister(&jz_bat_driver);
+}
+module_exit(jz_bat_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jiejing Zhang <kzjeef@gmail.com>");
+MODULE_DESCRIPTION("JZ4720/JZ4740 SoC battery driver");