--- /dev/null
+/*
+ * Battery class driver for Apple PMU
+ *
+ * Copyright © 2006 David Woodhouse <dwmw2@infradead.org>
+ *
+ * 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/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/power_supply.h>
+#include <linux/adb.h>
+#include <linux/pmu.h>
+#include <linux/slab.h>
+
+static struct pmu_battery_dev {
+ struct power_supply *bat;
+ struct power_supply_desc bat_desc;
+ struct pmu_battery_info *pbi;
+ char name[16];
+ int propval;
+} *pbats[PMU_MAX_BATTERIES];
+
+#define to_pmu_battery_dev(x) power_supply_get_drvdata(x)
+
+/*********************************************************************
+ * Power
+ *********************************************************************/
+
+static int pmu_get_ac_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = (!!(pmu_power_flags & PMU_PWR_AC_PRESENT)) ||
+ (pmu_battery_count == 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property pmu_ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const struct power_supply_desc pmu_ac_desc = {
+ .name = "pmu-ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = pmu_ac_props,
+ .num_properties = ARRAY_SIZE(pmu_ac_props),
+ .get_property = pmu_get_ac_prop,
+};
+
+static struct power_supply *pmu_ac;
+
+/*********************************************************************
+ * Battery properties
+ *********************************************************************/
+
+static char *pmu_batt_types[] = {
+ "Smart", "Comet", "Hooper", "Unknown"
+};
+
+static char *pmu_bat_get_model_name(struct pmu_battery_info *pbi)
+{
+ switch (pbi->flags & PMU_BATT_TYPE_MASK) {
+ case PMU_BATT_TYPE_SMART:
+ return pmu_batt_types[0];
+ case PMU_BATT_TYPE_COMET:
+ return pmu_batt_types[1];
+ case PMU_BATT_TYPE_HOOPER:
+ return pmu_batt_types[2];
+ default: break;
+ }
+ return pmu_batt_types[3];
+}
+
+static int pmu_bat_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pmu_battery_dev *pbat = to_pmu_battery_dev(psy);
+ struct pmu_battery_info *pbi = pbat->pbi;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (pbi->flags & PMU_BATT_CHARGING)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else if (pmu_power_flags & PMU_PWR_AC_PRESENT)
+ val->intval = POWER_SUPPLY_STATUS_FULL;
+ else
+ val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = !!(pbi->flags & PMU_BATT_PRESENT);
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = pmu_bat_get_model_name(pbi);
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_AVG:
+ val->intval = pbi->charge * 1000; /* mWh -> µWh */
+ break;
+ case POWER_SUPPLY_PROP_ENERGY_FULL:
+ val->intval = pbi->max_charge * 1000; /* mWh -> µWh */
+ break;
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ val->intval = pbi->amperage * 1000; /* mA -> µA */
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+ val->intval = pbi->voltage * 1000; /* mV -> µV */
+ break;
+ case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
+ val->intval = pbi->time_remaining;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static enum power_supply_property pmu_bat_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_ENERGY_AVG,
+ POWER_SUPPLY_PROP_ENERGY_FULL,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_VOLTAGE_AVG,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
+};
+
+/*********************************************************************
+ * Initialisation
+ *********************************************************************/
+
+static struct platform_device *bat_pdev;
+
+static int __init pmu_bat_init(void)
+{
+ int ret = 0;
+ int i;
+
+ bat_pdev = platform_device_register_simple("pmu-battery",
+ 0, NULL, 0);
+ if (IS_ERR(bat_pdev)) {
+ ret = PTR_ERR(bat_pdev);
+ goto pdev_register_failed;
+ }
+
+ pmu_ac = power_supply_register(&bat_pdev->dev, &pmu_ac_desc, NULL);
+ if (IS_ERR(pmu_ac)) {
+ ret = PTR_ERR(pmu_ac);
+ goto ac_register_failed;
+ }
+
+ for (i = 0; i < pmu_battery_count; i++) {
+ struct power_supply_config psy_cfg = {};
+ struct pmu_battery_dev *pbat = kzalloc(sizeof(*pbat),
+ GFP_KERNEL);
+ if (!pbat)
+ break;
+
+ sprintf(pbat->name, "PMU_battery_%d", i);
+ pbat->bat_desc.name = pbat->name;
+ pbat->bat_desc.properties = pmu_bat_props;
+ pbat->bat_desc.num_properties = ARRAY_SIZE(pmu_bat_props);
+ pbat->bat_desc.get_property = pmu_bat_get_property;
+ pbat->pbi = &pmu_batteries[i];
+ psy_cfg.drv_data = pbat;
+
+ pbat->bat = power_supply_register(&bat_pdev->dev,
+ &pbat->bat_desc,
+ &psy_cfg);
+ if (IS_ERR(pbat->bat)) {
+ ret = PTR_ERR(pbat->bat);
+ kfree(pbat);
+ goto battery_register_failed;
+ }
+ pbats[i] = pbat;
+ }
+
+ goto success;
+
+battery_register_failed:
+ while (i--) {
+ if (!pbats[i])
+ continue;
+ power_supply_unregister(pbats[i]->bat);
+ kfree(pbats[i]);
+ }
+ power_supply_unregister(pmu_ac);
+ac_register_failed:
+ platform_device_unregister(bat_pdev);
+pdev_register_failed:
+success:
+ return ret;
+}
+
+static void __exit pmu_bat_exit(void)
+{
+ int i;
+
+ for (i = 0; i < PMU_MAX_BATTERIES; i++) {
+ if (!pbats[i])
+ continue;
+ power_supply_unregister(pbats[i]->bat);
+ kfree(pbats[i]);
+ }
+ power_supply_unregister(pmu_ac);
+ platform_device_unregister(bat_pdev);
+}
+
+module_init(pmu_bat_init);
+module_exit(pmu_bat_exit);
+
+MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("PMU battery driver");
Code Review / kvmfornfv.git / blobdiff