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Release 4.11 drivers/power/supply/collie_battery.c

/*
 * Battery and Power Management code for the Sharp SL-5x00
 *
 * Copyright (C) 2009 Thomas Kunze
 *
 * based on tosa_battery.c
 *
 * 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/gpio.h>
#include <linux/mfd/ucb1x00.h>

#include <asm/mach/sharpsl_param.h>
#include <asm/mach-types.h>
#include <mach/collie.h>

static DEFINE_MUTEX(bat_lock); /* protects gpio pins */

static struct work_struct bat_work;

static struct ucb1x00 *ucb;


struct collie_bat {
	
int status;
	
struct power_supply *psy;
	
int full_chrg;

	
struct mutex work_lock; /* protects data */

	
bool (*is_present)(struct collie_bat *bat);
	
int gpio_full;
	
int gpio_charge_on;

	
int technology;

	
int gpio_bat;
	
int adc_bat;
	
int adc_bat_divider;
	
int bat_max;
	
int bat_min;

	
int gpio_temp;
	
int adc_temp;
	
int adc_temp_divider;
};


static struct collie_bat collie_bat_main;


static unsigned long collie_read_bat(struct collie_bat *bat) { unsigned long value = 0; if (bat->gpio_bat < 0 || bat->adc_bat < 0) return 0; mutex_lock(&bat_lock); gpio_set_value(bat->gpio_bat, 1); msleep(5); ucb1x00_adc_enable(ucb); value = ucb1x00_adc_read(ucb, bat->adc_bat, UCB_SYNC); ucb1x00_adc_disable(ucb); gpio_set_value(bat->gpio_bat, 0); mutex_unlock(&bat_lock); value = value * 1000000 / bat->adc_bat_divider; return value; }

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PersonTokensPropCommitsCommitProp
Thomas Kunze106100.00%1100.00%
Total106100.00%1100.00%


static unsigned long collie_read_temp(struct collie_bat *bat) { unsigned long value = 0; if (bat->gpio_temp < 0 || bat->adc_temp < 0) return 0; mutex_lock(&bat_lock); gpio_set_value(bat->gpio_temp, 1); msleep(5); ucb1x00_adc_enable(ucb); value = ucb1x00_adc_read(ucb, bat->adc_temp, UCB_SYNC); ucb1x00_adc_disable(ucb); gpio_set_value(bat->gpio_temp, 0); mutex_unlock(&bat_lock); value = value * 10000 / bat->adc_temp_divider; return value; }

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PersonTokensPropCommitsCommitProp
Thomas Kunze106100.00%1100.00%
Total106100.00%1100.00%


static int collie_bat_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { int ret = 0; struct collie_bat *bat = power_supply_get_drvdata(psy); if (bat->is_present && !bat->is_present(bat) && psp != POWER_SUPPLY_PROP_PRESENT) { return -ENODEV; } switch (psp) { case POWER_SUPPLY_PROP_STATUS: val->intval = bat->status; break; case POWER_SUPPLY_PROP_TECHNOLOGY: val->intval = bat->technology; break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: val->intval = collie_read_bat(bat); break; case POWER_SUPPLY_PROP_VOLTAGE_MAX: if (bat->full_chrg == -1) val->intval = bat->bat_max; else val->intval = bat->full_chrg; break; case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN: val->intval = bat->bat_max; break; case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN: val->intval = bat->bat_min; break; case POWER_SUPPLY_PROP_TEMP: val->intval = collie_read_temp(bat); break; case POWER_SUPPLY_PROP_PRESENT: val->intval = bat->is_present ? bat->is_present(bat) : 1; break; default: ret = -EINVAL; break; } return ret; }

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PersonTokensPropCommitsCommitProp
Thomas Kunze19999.50%150.00%
Krzysztof Kozlowski10.50%150.00%
Total200100.00%2100.00%


static void collie_bat_external_power_changed(struct power_supply *psy) { schedule_work(&bat_work); }

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Thomas Kunze17100.00%1100.00%
Total17100.00%1100.00%


static irqreturn_t collie_bat_gpio_isr(int irq, void *data) { pr_info("collie_bat_gpio irq\n"); schedule_work(&bat_work); return IRQ_HANDLED; }

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Thomas Kunze2696.30%150.00%
Jochen Friedrich13.70%150.00%
Total27100.00%2100.00%


static void collie_bat_update(struct collie_bat *bat) { int old; struct power_supply *psy = bat->psy; mutex_lock(&bat->work_lock); old = bat->status; if (bat->is_present && !bat->is_present(bat)) { printk(KERN_NOTICE "%s not present\n", psy->desc->name); bat->status = POWER_SUPPLY_STATUS_UNKNOWN; bat->full_chrg = -1; } else if (power_supply_am_i_supplied(psy)) { if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING) { gpio_set_value(bat->gpio_charge_on, 1); mdelay(15); } if (gpio_get_value(bat->gpio_full)) { if (old == POWER_SUPPLY_STATUS_CHARGING || bat->full_chrg == -1) bat->full_chrg = collie_read_bat(bat); gpio_set_value(bat->gpio_charge_on, 0); bat->status = POWER_SUPPLY_STATUS_FULL; } else { gpio_set_value(bat->gpio_charge_on, 1); bat->status = POWER_SUPPLY_STATUS_CHARGING; } } else { gpio_set_value(bat->gpio_charge_on, 0); bat->status = POWER_SUPPLY_STATUS_DISCHARGING; } if (old != bat->status) power_supply_changed(psy); mutex_unlock(&bat->work_lock); }

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Thomas Kunze21599.08%150.00%
Krzysztof Kozlowski20.92%150.00%
Total217100.00%2100.00%


static void collie_bat_work(struct work_struct *work) { collie_bat_update(&collie_bat_main); }

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Thomas Kunze17100.00%1100.00%
Total17100.00%1100.00%

static enum power_supply_property collie_bat_main_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_MAX, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_TEMP, }; static enum power_supply_property collie_bat_bu_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, POWER_SUPPLY_PROP_VOLTAGE_MAX, POWER_SUPPLY_PROP_PRESENT, }; static const struct power_supply_desc collie_bat_main_desc = { .name = "main-battery", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = collie_bat_main_props, .num_properties = ARRAY_SIZE(collie_bat_main_props), .get_property = collie_bat_get_property, .external_power_changed = collie_bat_external_power_changed, .use_for_apm = 1, }; static struct collie_bat collie_bat_main = { .status = POWER_SUPPLY_STATUS_DISCHARGING, .full_chrg = -1, .psy = NULL, .gpio_full = COLLIE_GPIO_CO, .gpio_charge_on = COLLIE_GPIO_CHARGE_ON, .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, .gpio_bat = COLLIE_GPIO_MBAT_ON, .adc_bat = UCB_ADC_INP_AD1, .adc_bat_divider = 155, .bat_max = 4310000, .bat_min = 1551 * 1000000 / 414, .gpio_temp = COLLIE_GPIO_TMP_ON, .adc_temp = UCB_ADC_INP_AD0, .adc_temp_divider = 10000, }; static const struct power_supply_desc collie_bat_bu_desc = { .name = "backup-battery", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = collie_bat_bu_props, .num_properties = ARRAY_SIZE(collie_bat_bu_props), .get_property = collie_bat_get_property, .external_power_changed = collie_bat_external_power_changed, }; static struct collie_bat collie_bat_bu = { .status = POWER_SUPPLY_STATUS_UNKNOWN, .full_chrg = -1, .psy = NULL, .gpio_full = -1, .gpio_charge_on = -1, .technology = POWER_SUPPLY_TECHNOLOGY_LiMn, .gpio_bat = COLLIE_GPIO_BBAT_ON, .adc_bat = UCB_ADC_INP_AD1, .adc_bat_divider = 155, .bat_max = 3000000, .bat_min = 1900000, .gpio_temp = -1, .adc_temp = -1, .adc_temp_divider = -1, }; static struct gpio collie_batt_gpios[] = { { COLLIE_GPIO_CO, GPIOF_IN, "main battery full" }, { COLLIE_GPIO_MAIN_BAT_LOW, GPIOF_IN, "main battery low" }, { COLLIE_GPIO_CHARGE_ON, GPIOF_OUT_INIT_LOW, "main charge on" }, { COLLIE_GPIO_MBAT_ON, GPIOF_OUT_INIT_LOW, "main battery" }, { COLLIE_GPIO_TMP_ON, GPIOF_OUT_INIT_LOW, "main battery temp" }, { COLLIE_GPIO_BBAT_ON, GPIOF_OUT_INIT_LOW, "backup battery" }, }; #ifdef CONFIG_PM static int wakeup_enabled;
static int collie_bat_suspend(struct ucb1x00_dev *dev) { /* flush all pending status updates */ flush_work(&bat_work); if (device_may_wakeup(&dev->ucb->dev) && collie_bat_main.status == POWER_SUPPLY_STATUS_CHARGING) wakeup_enabled = !enable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO)); else wakeup_enabled = 0; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Dmitry Baryshkov3461.82%125.00%
Thomas Kunze1629.09%125.00%
Tejun Heo59.09%250.00%
Total55100.00%4100.00%


static int collie_bat_resume(struct ucb1x00_dev *dev) { if (wakeup_enabled) disable_irq_wake(gpio_to_irq(COLLIE_GPIO_CO)); /* things may have changed while we were away */ schedule_work(&bat_work); return 0; }

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PersonTokensPropCommitsCommitProp
Thomas Kunze2163.64%150.00%
Dmitry Baryshkov1236.36%150.00%
Total33100.00%2100.00%

#else #define collie_bat_suspend NULL #define collie_bat_resume NULL #endif
static int collie_bat_probe(struct ucb1x00_dev *dev) { int ret; struct power_supply_config psy_main_cfg = {}, psy_bu_cfg = {}; if (!machine_is_collie()) return -ENODEV; ucb = dev->ucb; ret = gpio_request_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios)); if (ret) return ret; mutex_init(&collie_bat_main.work_lock); INIT_WORK(&bat_work, collie_bat_work); psy_main_cfg.drv_data = &collie_bat_main; collie_bat_main.psy = power_supply_register(&dev->ucb->dev, &collie_bat_main_desc, &psy_main_cfg); if (IS_ERR(collie_bat_main.psy)) { ret = PTR_ERR(collie_bat_main.psy); goto err_psy_reg_main; } psy_bu_cfg.drv_data = &collie_bat_bu; collie_bat_bu.psy = power_supply_register(&dev->ucb->dev, &collie_bat_bu_desc, &psy_bu_cfg); if (IS_ERR(collie_bat_bu.psy)) { ret = PTR_ERR(collie_bat_bu.psy); goto err_psy_reg_bu; } ret = request_irq(gpio_to_irq(COLLIE_GPIO_CO), collie_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "main full", &collie_bat_main); if (ret) goto err_irq; device_init_wakeup(&ucb->dev, 1); schedule_work(&bat_work); return 0; err_irq: power_supply_unregister(collie_bat_bu.psy); err_psy_reg_bu: power_supply_unregister(collie_bat_main.psy); err_psy_reg_main: /* see comment in collie_bat_remove */ cancel_work_sync(&bat_work); gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios)); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Kunze15559.16%114.29%
Krzysztof Kozlowski7127.10%228.57%
Dmitry Baryshkov166.11%228.57%
Axel Lin155.73%114.29%
Tejun Heo51.91%114.29%
Total262100.00%7100.00%


static void collie_bat_remove(struct ucb1x00_dev *dev) { free_irq(gpio_to_irq(COLLIE_GPIO_CO), &collie_bat_main); power_supply_unregister(collie_bat_bu.psy); power_supply_unregister(collie_bat_main.psy); /* * Now cancel the bat_work. We won't get any more schedules, * since all sources (isr and external_power_changed) are * unregistered now. */ cancel_work_sync(&bat_work); gpio_free_array(collie_batt_gpios, ARRAY_SIZE(collie_batt_gpios)); }

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Thomas Kunze4279.25%133.33%
Tejun Heo611.32%133.33%
Axel Lin59.43%133.33%
Total53100.00%3100.00%

static struct ucb1x00_driver collie_bat_driver = { .add = collie_bat_probe, .remove = collie_bat_remove, .suspend = collie_bat_suspend, .resume = collie_bat_resume, };
static int __init collie_bat_init(void) { return ucb1x00_register_driver(&collie_bat_driver); }

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Thomas Kunze16100.00%1100.00%
Total16100.00%1100.00%


static void __exit collie_bat_exit(void) { ucb1x00_unregister_driver(&collie_bat_driver); }

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Thomas Kunze15100.00%1100.00%
Total15100.00%1100.00%

module_init(collie_bat_init); module_exit(collie_bat_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Thomas Kunze"); MODULE_DESCRIPTION("Collie battery driver");

Overall Contributors

PersonTokensPropCommitsCommitProp
Thomas Kunze142785.35%110.00%
Krzysztof Kozlowski1277.60%220.00%
Dmitry Baryshkov623.71%220.00%
Axel Lin352.09%110.00%
Tejun Heo160.96%220.00%
Arnd Bergmann40.24%110.00%
Jochen Friedrich10.06%110.00%
Total1672100.00%10100.00%
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