--- /dev/null
+/*
+ * 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");
Code Review / kvmfornfv.git / blobdiff