--- /dev/null
+/*
+ * 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.
+ *
+ * h3xxx atmel micro companion support, battery subdevice
+ * based on previous kernel 2.4 version
+ * Author : Alessandro Gardich <gremlin@gremlin.it>
+ * Author : Linus Walleij <linus.walleij@linaro.org>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/ipaq-micro.h>
+#include <linux/power_supply.h>
+#include <linux/workqueue.h>
+
+#define BATT_PERIOD 100000 /* 100 seconds in milliseconds */
+
+#define MICRO_BATT_CHEM_ALKALINE 0x01
+#define MICRO_BATT_CHEM_NICD 0x02
+#define MICRO_BATT_CHEM_NIMH 0x03
+#define MICRO_BATT_CHEM_LION 0x04
+#define MICRO_BATT_CHEM_LIPOLY 0x05
+#define MICRO_BATT_CHEM_NOT_INSTALLED 0x06
+#define MICRO_BATT_CHEM_UNKNOWN 0xff
+
+#define MICRO_BATT_STATUS_HIGH 0x01
+#define MICRO_BATT_STATUS_LOW 0x02
+#define MICRO_BATT_STATUS_CRITICAL 0x04
+#define MICRO_BATT_STATUS_CHARGING 0x08
+#define MICRO_BATT_STATUS_CHARGEMAIN 0x10
+#define MICRO_BATT_STATUS_DEAD 0x20 /* Battery will not charge */
+#define MICRO_BATT_STATUS_NOTINSTALLED 0x20 /* For expansion pack batteries */
+#define MICRO_BATT_STATUS_FULL 0x40 /* Battery fully charged */
+#define MICRO_BATT_STATUS_NOBATTERY 0x80
+#define MICRO_BATT_STATUS_UNKNOWN 0xff
+
+struct micro_battery {
+ struct ipaq_micro *micro;
+ struct workqueue_struct *wq;
+ struct delayed_work update;
+ u8 ac;
+ u8 chemistry;
+ unsigned int voltage;
+ u16 temperature;
+ u8 flag;
+};
+
+static void micro_battery_work(struct work_struct *work)
+{
+ struct micro_battery *mb = container_of(work,
+ struct micro_battery, update.work);
+ struct ipaq_micro_msg msg_battery = {
+ .id = MSG_BATTERY,
+ };
+ struct ipaq_micro_msg msg_sensor = {
+ .id = MSG_THERMAL_SENSOR,
+ };
+
+ /* First send battery message */
+ ipaq_micro_tx_msg_sync(mb->micro, &msg_battery);
+ if (msg_battery.rx_len < 4)
+ pr_info("ERROR");
+
+ /*
+ * Returned message format:
+ * byte 0: 0x00 = Not plugged in
+ * 0x01 = AC adapter plugged in
+ * byte 1: chemistry
+ * byte 2: voltage LSB
+ * byte 3: voltage MSB
+ * byte 4: flags
+ * byte 5-9: same for battery 2
+ */
+ mb->ac = msg_battery.rx_data[0];
+ mb->chemistry = msg_battery.rx_data[1];
+ mb->voltage = ((((unsigned short)msg_battery.rx_data[3] << 8) +
+ msg_battery.rx_data[2]) * 5000L) * 1000 / 1024;
+ mb->flag = msg_battery.rx_data[4];
+
+ if (msg_battery.rx_len == 9)
+ pr_debug("second battery ignored\n");
+
+ /* Then read the sensor */
+ ipaq_micro_tx_msg_sync(mb->micro, &msg_sensor);
+ mb->temperature = msg_sensor.rx_data[1] << 8 | msg_sensor.rx_data[0];
+
+ queue_delayed_work(mb->wq, &mb->update, msecs_to_jiffies(BATT_PERIOD));
+}
+
+static int get_capacity(struct power_supply *b)
+{
+ struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
+
+ switch (mb->flag & 0x07) {
+ case MICRO_BATT_STATUS_HIGH:
+ return 100;
+ break;
+ case MICRO_BATT_STATUS_LOW:
+ return 50;
+ break;
+ case MICRO_BATT_STATUS_CRITICAL:
+ return 5;
+ break;
+ default:
+ break;
+ }
+ return 0;
+}
+
+static int get_status(struct power_supply *b)
+{
+ struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
+
+ if (mb->flag == MICRO_BATT_STATUS_UNKNOWN)
+ return POWER_SUPPLY_STATUS_UNKNOWN;
+
+ if (mb->flag & MICRO_BATT_STATUS_FULL)
+ return POWER_SUPPLY_STATUS_FULL;
+
+ if ((mb->flag & MICRO_BATT_STATUS_CHARGING) ||
+ (mb->flag & MICRO_BATT_STATUS_CHARGEMAIN))
+ return POWER_SUPPLY_STATUS_CHARGING;
+
+ return POWER_SUPPLY_STATUS_DISCHARGING;
+}
+
+static int micro_batt_get_property(struct power_supply *b,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_TECHNOLOGY:
+ switch (mb->chemistry) {
+ case MICRO_BATT_CHEM_NICD:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_NiCd;
+ break;
+ case MICRO_BATT_CHEM_NIMH:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_NiMH;
+ break;
+ case MICRO_BATT_CHEM_LION:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
+ break;
+ case MICRO_BATT_CHEM_LIPOLY:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_LIPO;
+ break;
+ default:
+ val->intval = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
+ break;
+ };
+ break;
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = get_status(b);
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+ val->intval = 4700000;
+ break;
+ case POWER_SUPPLY_PROP_CAPACITY:
+ val->intval = get_capacity(b);
+ break;
+ case POWER_SUPPLY_PROP_TEMP:
+ val->intval = mb->temperature;
+ break;
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ val->intval = mb->voltage;
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+static int micro_ac_get_property(struct power_supply *b,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct micro_battery *mb = dev_get_drvdata(b->dev.parent);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = mb->ac;
+ break;
+ default:
+ return -EINVAL;
+ };
+
+ return 0;
+}
+
+static enum power_supply_property micro_batt_power_props[] = {
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+};
+
+static const struct power_supply_desc micro_batt_power_desc = {
+ .name = "main-battery",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = micro_batt_power_props,
+ .num_properties = ARRAY_SIZE(micro_batt_power_props),
+ .get_property = micro_batt_get_property,
+ .use_for_apm = 1,
+};
+
+static enum power_supply_property micro_ac_power_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+static const struct power_supply_desc micro_ac_power_desc = {
+ .name = "ac",
+ .type = POWER_SUPPLY_TYPE_MAINS,
+ .properties = micro_ac_power_props,
+ .num_properties = ARRAY_SIZE(micro_ac_power_props),
+ .get_property = micro_ac_get_property,
+};
+
+static struct power_supply *micro_batt_power, *micro_ac_power;
+
+static int micro_batt_probe(struct platform_device *pdev)
+{
+ struct micro_battery *mb;
+ int ret;
+
+ mb = devm_kzalloc(&pdev->dev, sizeof(*mb), GFP_KERNEL);
+ if (!mb)
+ return -ENOMEM;
+
+ mb->micro = dev_get_drvdata(pdev->dev.parent);
+ mb->wq = create_singlethread_workqueue("ipaq-battery-wq");
+ if (!mb->wq)
+ return -ENOMEM;
+
+ INIT_DELAYED_WORK(&mb->update, micro_battery_work);
+ platform_set_drvdata(pdev, mb);
+ queue_delayed_work(mb->wq, &mb->update, 1);
+
+ micro_batt_power = power_supply_register(&pdev->dev,
+ µ_batt_power_desc, NULL);
+ if (IS_ERR(micro_batt_power)) {
+ ret = PTR_ERR(micro_batt_power);
+ goto batt_err;
+ }
+
+ micro_ac_power = power_supply_register(&pdev->dev,
+ µ_ac_power_desc, NULL);
+ if (IS_ERR(micro_ac_power)) {
+ ret = PTR_ERR(micro_ac_power);
+ goto ac_err;
+ }
+
+ dev_info(&pdev->dev, "iPAQ micro battery driver\n");
+ return 0;
+
+ac_err:
+ power_supply_unregister(micro_ac_power);
+batt_err:
+ cancel_delayed_work_sync(&mb->update);
+ destroy_workqueue(mb->wq);
+ return ret;
+}
+
+static int micro_batt_remove(struct platform_device *pdev)
+
+{
+ struct micro_battery *mb = platform_get_drvdata(pdev);
+
+ power_supply_unregister(micro_ac_power);
+ power_supply_unregister(micro_batt_power);
+ cancel_delayed_work_sync(&mb->update);
+ destroy_workqueue(mb->wq);
+
+ return 0;
+}
+
+static int micro_batt_suspend(struct device *dev)
+{
+ struct micro_battery *mb = dev_get_drvdata(dev);
+
+ cancel_delayed_work_sync(&mb->update);
+ return 0;
+}
+
+static int micro_batt_resume(struct device *dev)
+{
+ struct micro_battery *mb = dev_get_drvdata(dev);
+
+ queue_delayed_work(mb->wq, &mb->update, msecs_to_jiffies(BATT_PERIOD));
+ return 0;
+}
+
+static const struct dev_pm_ops micro_batt_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(micro_batt_suspend, micro_batt_resume)
+};
+
+static struct platform_driver micro_batt_device_driver = {
+ .driver = {
+ .name = "ipaq-micro-battery",
+ .pm = µ_batt_dev_pm_ops,
+ },
+ .probe = micro_batt_probe,
+ .remove = micro_batt_remove,
+};
+module_platform_driver(micro_batt_device_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("driver for iPAQ Atmel micro battery");
+MODULE_ALIAS("platform:battery-ipaq-micro");
Code Review / kvmfornfv.git / blobdiff