kvmfornfv -

Age	Commit message (Expand)	Author	Files	Lines
2015-08-04	Add the rt linux 4.1.3-rt3 as base	Yunhong Jiang	1	-0/+85

/* * Battery and Power Management code for the Sharp SL-6000x * * Copyright (c) 2005 Dirk Opfer * Copyright (c) 2008 Dmitry Baryshkov * * 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/wm97xx.h> #include <linux/delay.h> #include <linux/spinlock.h> #include <linux/interrupt.h> #include <linux/gpio.h> #include <asm/mach-types.h> #include <mach/tosa.h> static DEFINE_MUTEX(bat_lock); /* protects gpio pins */ static struct work_struct bat_work; struct tosa_bat { int status; struct power_supply *psy; int full_chrg; struct mutex work_lock; /* protects data */ bool (*is_present)(struct tosa_bat *bat); int gpio_full; int gpio_charge_off; 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 tosa_bat tosa_bat_main; static struct tosa_bat tosa_bat_jacket; static unsigned long tosa_read_bat(struct tosa_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); value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent), bat->adc_bat); gpio_set_value(bat->gpio_bat, 0); mutex_unlock(&bat_lock); value = value * 1000000 / bat->adc_bat_divider; return value; } static unsigned long tosa_read_temp(struct tosa_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); value = wm97xx_read_aux_adc(dev_get_drvdata(bat->psy->dev.parent), bat->adc_temp); gpio_set_value(bat->gpio_temp, 0); mutex_unlock(&bat_lock); value = value * 10000 / bat->adc_temp_divider; return value; } static int tosa_bat_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { int ret = 0; struct tosa_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 = tosa_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 = tosa_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; } static bool tosa_jacket_bat_is_present(struct tosa_bat *bat) { return gpio_get_value(TOSA_GPIO_JACKET_DETECT) == 0; } static void tosa_bat_external_power_changed(struct power_supply *psy) { schedule_work(&bat_work); } static irqreturn_t tosa_bat_gpio_isr(int irq, void *data) { pr_info("tosa_bat_gpio irq\n"); schedule_work(&bat_work); return IRQ_HANDLED; } static void tosa_bat_update(struct tosa_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_off, 0); mdelay(15); } if (gpio_get_value(bat->gpio_full)) { if (old == POWER_SUPPLY_STATUS_CHARGING || bat->full_chrg == -1) bat->full_chrg = tosa_read_bat(bat); gpio_set_value(bat->gpio_charge_off, 1); bat->status = POWER_SUPPLY_STATUS_FULL; } else { gpio_set_value(bat->gpio_charge_off, 0); bat->status = POWER_SUPPLY_STATUS_CHARGING; } } else { gpio_set_value(bat->gpio_charge_off, 1); bat->status = POWER_SUPPLY_STATUS_DISCHARGING; } if (old != bat->status) power_supply_changed(psy); mutex_unlock(&bat->work_lock); } static void tosa_bat_work(struct work_struct *work) { tosa_bat_update(&tosa_bat_main); tosa_bat_update(&tosa_bat_jacket); } static enum power_supply_property tosa_bat_main_props[] = { POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_VOLTAGE_MAX, POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, POWER_SUPPLY_PROP_TEMP, POWER_SUPPLY_PROP_PRESENT, }; static enum power_supply_property tosa_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_PRESENT, }; static const struct power_supply_desc tosa_bat_main_desc = { .name = "main-battery", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = tosa_bat_main_props, .num_properties = ARRAY_SIZE(tosa_bat_main_props), .get_property = tosa_bat_get_property, .external_power_changed = tosa_bat_external_power_changed, .use_for_apm = 1, }; static const struct power_supply_desc tosa_bat_jacket_desc = { .name = "jacket-battery", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = tosa_bat_main_props, .num_properties = ARRAY_SIZE(tosa_bat_main_props), .get_property = tosa_bat_get_property, .external_power_changed = tosa_bat_external_power_changed, }; static const struct power_supply_desc tosa_bat_bu_desc = { .name = "backup-battery", .type = POWER_SUPPLY_TYPE_BATTERY, .properties = tosa_bat_bu_props, .num_properties = ARRAY_SIZE(tosa_bat_bu_props), .get_property = tosa_bat_get_property, .external_power_changed = tosa_bat_external_power_changed, }; static struct tosa_bat tosa_bat_main = { .status = POWER_SUPPLY_STATUS_DISCHARGING, .full_chrg = -1, .psy = NULL, .gpio_full = TOSA_GPIO_BAT0_CRG, .gpio_charge_off = TOSA_GPIO_CHARGE_OFF, .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, .gpio_bat = TOSA_GPIO_BAT0_V_ON, .adc_bat = WM97XX_AUX_ID3, .adc_bat_divider = 414, .bat_max = 4310000, .bat_min = 1551 * 1000000 / 414, .gpio_temp = TOSA_GPIO_BAT1_TH_ON, .adc_temp = WM97XX_AUX_ID2, .adc_temp_divider = 10000, }; static struct tosa_bat tosa_bat_jacket = { .status = POWER_SUPPLY_STATUS_DISCHARGING, .full_chrg = -1, .psy = NULL, .is_present = tosa_jacket_bat_is_present, .gpio_full = TOSA_GPIO_BAT1_CRG, .gpio_charge_off = TOSA_GPIO_CHARGE_OFF_JC, .technology = POWER_SUPPLY_TECHNOLOGY_LIPO, .gpio_bat = TOSA_GPIO_BAT1_V_ON, .adc_bat = WM97XX_AUX_ID3, .adc_bat_divider = 414, .bat_max = 4310000, .bat_min = 1551 * 1000000 / 414, .gpio_temp = TOSA_GPIO_BAT0_TH_ON, .adc_temp = WM97XX_AUX_ID2, .adc_temp_divider = 10000, }; static struct tosa_bat tosa_bat_bu = { .status = POWER_SUPPLY_STATUS_UNKNOWN, .full_chrg = -1, .psy = NULL, .gpio_full = -1, .gpio_charge_off = -1, .technology = POWER_SUPPLY_TECHNOLOGY_LiMn, .gpio_bat = TOSA_GPIO_BU_CHRG_ON, .adc_bat = WM97XX_AUX_ID4, .adc_bat_divider = 1266, .gpio_temp = -1, .adc_temp = -1, .adc_temp_divider = -1, }; static struct gpio tosa_bat_gpios[] = { { TOSA_GPIO_CHARGE_OFF, GPIOF_OUT_INIT_HIGH, "main charge off" }, { TOSA_GPIO_CHARGE_OFF_JC, GPIOF_OUT_INIT_HIGH, "jacket charge off" }, { TOSA_GPIO_BAT_SW_ON, GPIOF_OUT_INIT_LOW, "battery switch" }, { TOSA_GPIO_BAT0_V_ON, GPIOF_OUT_INIT_LOW, "main battery" }, { TOSA_GPIO_BAT1_V_ON, GPIOF_OUT_INIT_LOW, "jacket battery" }, { TOSA_GPIO_BAT1_TH_ON, GPIOF_OUT_INIT_LOW, "main battery temp" }, { TOSA_GPIO_BAT0_TH_ON, GPIOF_OUT_INIT_LOW, "jacket battery temp" }, { TOSA_GPIO_BU_CHRG_ON, GPIOF_OUT_INIT_LOW, "backup battery" }, { TOSA_GPIO_BAT0_CRG, GPIOF_IN, "main battery full" }, { TOSA_GPIO_BAT1_CRG, GPIOF_IN, "jacket battery full" }, { TOSA_GPIO_BAT0_LOW, GPIOF_IN, "main battery low" }, { TOSA_GPIO_BAT1_LOW, GPIOF_IN, "jacket battery low" }, { TOSA_GPIO_JACKET_DETECT, GPIOF_IN, "jacket detect" }, }; #ifdef CONFIG_PM static int tosa_bat_suspend(struct platform_device *dev, pm_message_t state) { /* flush all pending status updates */ flush_work(&bat_work); return 0; } static int tosa_bat_resume(struct platform_device *dev) { /* things may have changed while we were away */ schedule_work(&bat_work); return 0; } #else #define tosa_bat_suspend NULL #define tosa_bat_resume NULL #endif static int tosa_bat_probe(struct platform_device *dev) { int ret; struct power_supply_config main_psy_cfg = {}, jacket_psy_cfg = {}, bu_psy_cfg = {}; if (!machine_is_tosa()) return -ENODEV; ret = gpio_request_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); if (ret) return ret; mutex_init(&tosa_bat_main.work_lock); mutex_init(&tosa_bat_jacket.work_lock); INIT_WORK(&bat_work, tosa_bat_work); main_psy_cfg.drv_data = &tosa_bat_main; tosa_bat_main.psy = power_supply_register(&dev->dev, &tosa_bat_main_desc, &main_psy_cfg); if (IS_ERR(tosa_bat_main.psy)) { ret = PTR_ERR(tosa_bat_main.psy); goto err_psy_reg_main; } jacket_psy_cfg.drv_data = &tosa_bat_jacket; tosa_bat_jacket.psy = power_supply_register(&dev->dev, &tosa_bat_jacket_desc, &jacket_psy_cfg); if (IS_ERR(tosa_bat_jacket.psy)) { ret = PTR_ERR(tosa_bat_jacket.psy); goto err_psy_reg_jacket; } bu_psy_cfg.drv_data = &tosa_bat_bu; tosa_bat_bu.psy = power_supply_register(&dev->dev, &tosa_bat_bu_desc, &bu_psy_cfg); if (IS_ERR(tosa_bat_bu.psy)) { ret = PTR_ERR(tosa_bat_bu.psy); goto err_psy_reg_bu; } ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), tosa_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "main full", &tosa_bat_main); if (ret) goto err_req_main; ret = request_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), tosa_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "jacket full", &tosa_bat_jacket); if (ret) goto err_req_jacket; ret = request_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), tosa_bat_gpio_isr, IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING, "jacket detect", &tosa_bat_jacket); if (!ret) { schedule_work(&bat_work); return 0; } free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); err_req_jacket: free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); err_req_main: power_supply_unregister(tosa_bat_bu.psy); err_psy_reg_bu: power_supply_unregister(tosa_bat_jacket.psy); err_psy_reg_jacket: power_supply_unregister(tosa_bat_main.psy); err_psy_reg_main: /* see comment in tosa_bat_remove */ cancel_work_sync(&bat_work); gpio_free_array(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); return ret; } static int tosa_bat_remove(struct platform_device *dev) { free_irq(gpio_to_irq(TOSA_GPIO_JACKET_DETECT), &tosa_bat_jacket); free_irq(gpio_to_irq(TOSA_GPIO_BAT1_CRG), &tosa_bat_jacket); free_irq(gpio_to_irq(TOSA_GPIO_BAT0_CRG), &tosa_bat_main); power_supply_unregister(tosa_bat_bu.psy); power_supply_unregister(tosa_bat_jacket.psy); power_supply_unregister(tosa_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(tosa_bat_gpios, ARRAY_SIZE(tosa_bat_gpios)); return 0; } static struct platform_driver tosa_bat_driver = { .driver.name = "wm97xx-battery", .driver.owner = THIS_MODULE, .probe = tosa_bat_probe, .remove = tosa_bat_remove, .suspend = tosa_bat_suspend, .resume = tosa_bat_resume, }; module_platform_driver(tosa_bat_driver); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Dmitry Baryshkov"); MODULE_DESCRIPTION("Tosa battery driver"); MODULE_ALIAS("platform:wm97xx-battery");