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|
/*
* 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.
*
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#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 <acpi/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);
struct acpi_ac_bl {
const char *hid;
int hrv;
};
static const struct acpi_device_id ac_device_ids[] = {
{"ACPI0003", 0},
{"", 0},
};
MODULE_DEVICE_TABLE(acpi, ac_device_ids);
/* Lists of PMIC ACPI HIDs with an (often better) native charger driver */
static const struct acpi_ac_bl acpi_ac_blacklist[] = {
{ "INT33F4", -1 }, /* X-Powers AXP288 PMIC */
{ "INT34D3", 3 }, /* Intel Cherrytrail Whiskey Cove PMIC */
};
#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));
/* fall through */
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 = (
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