--- /dev/null
+/*
+ * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/delay.h>
+#ifdef CONFIG_ACPI_PROCFS_POWER
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#endif
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/acpi.h>
+#include "battery.h"
+
+#define PREFIX "ACPI: "
+
+#define ACPI_AC_CLASS "ac_adapter"
+#define ACPI_AC_DEVICE_NAME "AC Adapter"
+#define ACPI_AC_FILE_STATE "state"
+#define ACPI_AC_NOTIFY_STATUS 0x80
+#define ACPI_AC_STATUS_OFFLINE 0x00
+#define ACPI_AC_STATUS_ONLINE 0x01
+#define ACPI_AC_STATUS_UNKNOWN 0xFF
+
+#define _COMPONENT ACPI_AC_COMPONENT
+ACPI_MODULE_NAME("ac");
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION("ACPI AC Adapter Driver");
+MODULE_LICENSE("GPL");
+
+
+static int acpi_ac_add(struct acpi_device *device);
+static int acpi_ac_remove(struct acpi_device *device);
+static void acpi_ac_notify(struct acpi_device *device, u32 event);
+
+static const struct acpi_device_id ac_device_ids[] = {
+ {"ACPI0003", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, ac_device_ids);
+
+#ifdef CONFIG_PM_SLEEP
+static int acpi_ac_resume(struct device *dev);
+#endif
+static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
+
+#ifdef CONFIG_ACPI_PROCFS_POWER
+extern struct proc_dir_entry *acpi_lock_ac_dir(void);
+extern void *acpi_unlock_ac_dir(struct proc_dir_entry *acpi_ac_dir);
+static int acpi_ac_open_fs(struct inode *inode, struct file *file);
+#endif
+
+
+static int ac_sleep_before_get_state_ms;
+
+static struct acpi_driver acpi_ac_driver = {
+ .name = "ac",
+ .class = ACPI_AC_CLASS,
+ .ids = ac_device_ids,
+ .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
+ .ops = {
+ .add = acpi_ac_add,
+ .remove = acpi_ac_remove,
+ .notify = acpi_ac_notify,
+ },
+ .drv.pm = &acpi_ac_pm,
+};
+
+struct acpi_ac {
+ struct power_supply *charger;
+ struct power_supply_desc charger_desc;
+ struct acpi_device * device;
+ unsigned long long state;
+ struct notifier_block battery_nb;
+};
+
+#define to_acpi_ac(x) power_supply_get_drvdata(x)
+
+#ifdef CONFIG_ACPI_PROCFS_POWER
+static const struct file_operations acpi_ac_fops = {
+ .owner = THIS_MODULE,
+ .open = acpi_ac_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+#endif
+
+/* --------------------------------------------------------------------------
+ AC Adapter Management
+ -------------------------------------------------------------------------- */
+
+static int acpi_ac_get_state(struct acpi_ac *ac)
+{
+ acpi_status status = AE_OK;
+
+ if (!ac)
+ return -EINVAL;
+
+ status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL,
+ &ac->state);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Error reading AC Adapter state"));
+ ac->state = ACPI_AC_STATUS_UNKNOWN;
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/* --------------------------------------------------------------------------
+ sysfs I/F
+ -------------------------------------------------------------------------- */
+static int get_ac_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct acpi_ac *ac = to_acpi_ac(psy);
+
+ if (!ac)
+ return -ENODEV;
+
+ if (acpi_ac_get_state(ac))
+ return -ENODEV;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = ac->state;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static enum power_supply_property ac_props[] = {
+ POWER_SUPPLY_PROP_ONLINE,
+};
+
+#ifdef CONFIG_ACPI_PROCFS_POWER
+/* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+static struct proc_dir_entry *acpi_ac_dir;
+
+static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_ac *ac = seq->private;
+
+
+ if (!ac)
+ return 0;
+
+ if (acpi_ac_get_state(ac)) {
+ seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
+ return 0;
+ }
+
+ seq_puts(seq, "state: ");
+ switch (ac->state) {
+ case ACPI_AC_STATUS_OFFLINE:
+ seq_puts(seq, "off-line\n");
+ break;
+ case ACPI_AC_STATUS_ONLINE:
+ seq_puts(seq, "on-line\n");
+ break;
+ default:
+ seq_puts(seq, "unknown\n");
+ break;
+ }
+
+ return 0;
+}
+
+static int acpi_ac_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
+}
+
+static int acpi_ac_add_fs(struct acpi_ac *ac)
+{
+ struct proc_dir_entry *entry = NULL;
+
+ printk(KERN_WARNING PREFIX "Deprecated procfs I/F for AC is loaded,"
+ " please retry with CONFIG_ACPI_PROCFS_POWER cleared\n");
+ if (!acpi_device_dir(ac->device)) {
+ acpi_device_dir(ac->device) =
+ proc_mkdir(acpi_device_bid(ac->device), acpi_ac_dir);
+ if (!acpi_device_dir(ac->device))
+ return -ENODEV;
+ }
+
+ /* 'state' [R] */
+ entry = proc_create_data(ACPI_AC_FILE_STATE,
+ S_IRUGO, acpi_device_dir(ac->device),
+ &acpi_ac_fops, ac);
+ if (!entry)
+ return -ENODEV;
+ return 0;
+}
+
+static int acpi_ac_remove_fs(struct acpi_ac *ac)
+{
+
+ if (acpi_device_dir(ac->device)) {
+ remove_proc_entry(ACPI_AC_FILE_STATE,
+ acpi_device_dir(ac->device));
+ remove_proc_entry(acpi_device_bid(ac->device), acpi_ac_dir);
+ acpi_device_dir(ac->device) = NULL;
+ }
+
+ return 0;
+}
+#endif
+
+/* --------------------------------------------------------------------------
+ Driver Model
+ -------------------------------------------------------------------------- */
+
+static void acpi_ac_notify(struct acpi_device *device, u32 event)
+{
+ struct acpi_ac *ac = acpi_driver_data(device);
+
+ if (!ac)
+ return;
+
+ switch (event) {
+ default:
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+ "Unsupported event [0x%x]\n", event));
+ case ACPI_AC_NOTIFY_STATUS:
+ case ACPI_NOTIFY_BUS_CHECK:
+ case ACPI_NOTIFY_DEVICE_CHECK:
+ /*
+ * A buggy BIOS may notify AC first and then sleep for
+ * a specific time before doing actual operations in the
+ * EC event handler (_Qxx). This will cause the AC state
+ * reported by the ACPI event to be incorrect, so wait for a
+ * specific time for the EC event handler to make progress.
+ */
+ if (ac_sleep_before_get_state_ms > 0)
+ msleep(ac_sleep_before_get_state_ms);
+
+ acpi_ac_get_state(ac);
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event,
+ (u32) ac->state);
+ acpi_notifier_call_chain(device, event, (u32) ac->state);
+ kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
+ }
+
+ return;
+}
+
+static int acpi_ac_battery_notify(struct notifier_block *nb,
+ unsigned long action, void *data)
+{
+ struct acpi_ac *ac = container_of(nb, struct acpi_ac, battery_nb);
+ struct acpi_bus_event *event = (struct acpi_bus_event *)data;
+
+ /*
+ * On HP Pavilion dv6-6179er AC status notifications aren't triggered
+ * when adapter is plugged/unplugged. However, battery status
+ * notifcations are triggered when battery starts charging or
+ * discharging. Re-reading AC status triggers lost AC notifications,
+ * if AC status has changed.
+ */
+ if (strcmp(event->device_class, ACPI_BATTERY_CLASS) == 0 &&
+ event->type == ACPI_BATTERY_NOTIFY_STATUS)
+ acpi_ac_get_state(ac);
+
+ return NOTIFY_OK;
+}
+
+static int thinkpad_e530_quirk(const struct dmi_system_id *d)
+{
+ ac_sleep_before_get_state_ms = 1000;
+ return 0;
+}
+
+static struct dmi_system_id ac_dmi_table[] = {
+ {
+ .callback = thinkpad_e530_quirk,
+ .ident = "thinkpad e530",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
+ },
+ },
+ {},
+};
+
+static int acpi_ac_add(struct acpi_device *device)
+{
+ struct power_supply_config psy_cfg = {};
+ int result = 0;
+ struct acpi_ac *ac = NULL;
+
+
+ if (!device)
+ return -EINVAL;
+
+ ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
+ if (!ac)
+ return -ENOMEM;
+
+ ac->device = device;
+ strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
+ strcpy(acpi_device_class(device), ACPI_AC_CLASS);
+ device->driver_data = ac;
+
+ result = acpi_ac_get_state(ac);
+ if (result)
+ goto end;
+
+ psy_cfg.drv_data = ac;
+
+ ac->charger_desc.name = acpi_device_bid(device);
+#ifdef CONFIG_ACPI_PROCFS_POWER
+ result = acpi_ac_add_fs(ac);
+ if (result)
+ goto end;
+#endif
+ ac->charger_desc.type = POWER_SUPPLY_TYPE_MAINS;
+ ac->charger_desc.properties = ac_props;
+ ac->charger_desc.num_properties = ARRAY_SIZE(ac_props);
+ ac->charger_desc.get_property = get_ac_property;
+ ac->charger = power_supply_register(&ac->device->dev,
+ &ac->charger_desc, &psy_cfg);
+ if (IS_ERR(ac->charger)) {
+ result = PTR_ERR(ac->charger);
+ goto end;
+ }
+
+ printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ ac->state ? "on-line" : "off-line");
+
+ ac->battery_nb.notifier_call = acpi_ac_battery_notify;
+ register_acpi_notifier(&ac->battery_nb);
+end:
+ if (result) {
+#ifdef CONFIG_ACPI_PROCFS_POWER
+ acpi_ac_remove_fs(ac);
+#endif
+ kfree(ac);
+ }
+
+ dmi_check_system(ac_dmi_table);
+ return result;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int acpi_ac_resume(struct device *dev)
+{
+ struct acpi_ac *ac;
+ unsigned old_state;
+
+ if (!dev)
+ return -EINVAL;
+
+ ac = acpi_driver_data(to_acpi_device(dev));
+ if (!ac)
+ return -EINVAL;
+
+ old_state = ac->state;
+ if (acpi_ac_get_state(ac))
+ return 0;
+ if (old_state != ac->state)
+ kobject_uevent(&ac->charger->dev.kobj, KOBJ_CHANGE);
+ return 0;
+}
+#else
+#define acpi_ac_resume NULL
+#endif
+
+static int acpi_ac_remove(struct acpi_device *device)
+{
+ struct acpi_ac *ac = NULL;
+
+
+ if (!device || !acpi_driver_data(device))
+ return -EINVAL;
+
+ ac = acpi_driver_data(device);
+
+ power_supply_unregister(ac->charger);
+ unregister_acpi_notifier(&ac->battery_nb);
+
+#ifdef CONFIG_ACPI_PROCFS_POWER
+ acpi_ac_remove_fs(ac);
+#endif
+
+ kfree(ac);
+
+ return 0;
+}
+
+static int __init acpi_ac_init(void)
+{
+ int result;
+
+ if (acpi_disabled)
+ return -ENODEV;
+
+#ifdef CONFIG_ACPI_PROCFS_POWER
+ acpi_ac_dir = acpi_lock_ac_dir();
+ if (!acpi_ac_dir)
+ return -ENODEV;
+#endif
+
+
+ result = acpi_bus_register_driver(&acpi_ac_driver);
+ if (result < 0) {
+#ifdef CONFIG_ACPI_PROCFS_POWER
+ acpi_unlock_ac_dir(acpi_ac_dir);
+#endif
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit acpi_ac_exit(void)
+{
+ acpi_bus_unregister_driver(&acpi_ac_driver);
+#ifdef CONFIG_ACPI_PROCFS_POWER
+ acpi_unlock_ac_dir(acpi_ac_dir);
+#endif
+}
+module_init(acpi_ac_init);
+module_exit(acpi_ac_exit);
Code Review / kvmfornfv.git / blobdiff