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author | Lars-Peter Clausen <lars@metafoo.de> | 2010-01-11 04:44:45 +0000 |
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committer | Lars-Peter Clausen <lars@metafoo.de> | 2010-01-11 04:44:45 +0000 |
commit | 541158d5ad4a941d927a397737b6588d2e4db22d (patch) | |
tree | e49a97f18123413611824b8993e9acff9d681bae /target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c | |
parent | db06ca593b3d80ec514ecb2b20d49e3638cd3f0b (diff) | |
download | mtk-20170518-541158d5ad4a941d927a397737b6588d2e4db22d.zip mtk-20170518-541158d5ad4a941d927a397737b6588d2e4db22d.tar.gz mtk-20170518-541158d5ad4a941d927a397737b6588d2e4db22d.tar.bz2 |
Merge xburst target.
SVN-Revision: 19098
Diffstat (limited to 'target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c')
-rw-r--r-- | target/linux/xburst/files-2.6.32/drivers/power/jz4740-battery.c | 471 |
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 0000000..fe03d80 --- /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"); |