linux/drivers/acpi/ac.c
Hans de Goede af3ec837b8 ACPI / AC: Add a blacklist with PMIC ACPI HIDs with a native charger driver
On some systems we have a native PMIC driver which provides Mains
monitoring, while the ACPI ac driver is broken on these systems
due to bad DSTDs or because we do not support the proprietary and
undocumented ACPI opregions these ACPI battery devices rely on
(e.g. BMOP opregion).

This leads for example to a ADP1 power_supply which reports
itself as always online even if no mains are connected.

This commit adds a blacklist with PMIC ACPI HIDs for which we've a
native charger or extcon driver and makes the ACPI ac driver not
register itself when a PMIC on this list is present.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-04-19 22:53:35 +02:00

479 lines
12 KiB
C

/*
* 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 "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));
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 const 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)
{
unsigned int i;
int result;
if (acpi_disabled)
return -ENODEV;
for (i = 0; i < ARRAY_SIZE(acpi_ac_blacklist); i++)
if (acpi_dev_present(acpi_ac_blacklist[i].hid, "1",
acpi_ac_blacklist[i].hrv)) {
pr_info(PREFIX "AC: found native %s PMIC, not loading\n",
acpi_ac_blacklist[i].hid);
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);