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path: root/drivers/acpi/ac.c
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Diffstat (limited to 'drivers/acpi/ac.c')
-rw-r--r--drivers/acpi/ac.c161
1 files changed, 116 insertions, 45 deletions
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 6512b20aecc..36b0e61f9c0 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -28,13 +28,16 @@
#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 <acpi/acpi_bus.h>
-#include <acpi/acpi_drivers.h>
+#include <linux/acpi.h>
+#include "battery.h"
#define PREFIX "ACPI: "
@@ -53,15 +56,9 @@ MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION("ACPI AC Adapter Driver");
MODULE_LICENSE("GPL");
-#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 acpi_ac_add(struct acpi_device *device);
-static int acpi_ac_remove(struct acpi_device *device, int type);
-static int acpi_ac_resume(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[] = {
@@ -70,6 +67,20 @@ static const struct acpi_device_id ac_device_ids[] = {
};
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,
@@ -78,15 +89,16 @@ static struct acpi_driver acpi_ac_driver = {
.ops = {
.add = acpi_ac_add,
.remove = acpi_ac_remove,
- .resume = acpi_ac_resume,
.notify = acpi_ac_notify,
},
+ .drv.pm = &acpi_ac_pm,
};
struct acpi_ac {
struct power_supply charger;
struct acpi_device * device;
unsigned long long state;
+ struct notifier_block battery_nb;
};
#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger)
@@ -109,13 +121,14 @@ 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);
+ 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"));
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Error reading AC Adapter state"));
ac->state = ACPI_AC_STATUS_UNKNOWN;
return -ENODEV;
}
@@ -190,39 +203,39 @@ static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
static int acpi_ac_open_fs(struct inode *inode, struct file *file)
{
- return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
+ return single_open(file, acpi_ac_seq_show, PDE_DATA(inode));
}
-static int acpi_ac_add_fs(struct acpi_device *device)
+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(device)) {
- acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
- acpi_ac_dir);
- if (!acpi_device_dir(device))
+ 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(device),
- &acpi_ac_fops, acpi_driver_data(device));
+ 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_device *device)
+static int acpi_ac_remove_fs(struct acpi_ac *ac)
{
- if (acpi_device_dir(device)) {
- remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
-
- remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
- acpi_device_dir(device) = NULL;
+ 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;
@@ -237,7 +250,6 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
{
struct acpi_ac *ac = acpi_driver_data(device);
-
if (!ac)
return;
@@ -248,8 +260,17 @@ static void acpi_ac_notify(struct acpi_device *device, u32 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_proc_event(device, event, (u32) ac->state);
acpi_bus_generate_netlink_event(device->pnp.device_class,
dev_name(&device->dev), event,
(u32) ac->state);
@@ -260,6 +281,44 @@ static void acpi_ac_notify(struct acpi_device *device, u32 event)
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)
{
int result = 0;
@@ -282,40 +341,51 @@ static int acpi_ac_add(struct acpi_device *device)
if (result)
goto end;
+ ac->charger.name = acpi_device_bid(device);
#ifdef CONFIG_ACPI_PROCFS_POWER
- result = acpi_ac_add_fs(device);
-#endif
+ result = acpi_ac_add_fs(ac);
if (result)
goto end;
- ac->charger.name = acpi_device_bid(device);
+#endif
ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
ac->charger.properties = ac_props;
ac->charger.num_properties = ARRAY_SIZE(ac_props);
ac->charger.get_property = get_ac_property;
- power_supply_register(&ac->device->dev, &ac->charger);
+ result = power_supply_register(&ac->device->dev, &ac->charger);
+ if (result)
+ goto end;
printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
acpi_device_name(device), acpi_device_bid(device),
ac->state ? "on-line" : "off-line");
- end:
+ 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(device);
+ acpi_ac_remove_fs(ac);
#endif
kfree(ac);
}
+ dmi_check_system(ac_dmi_table);
return result;
}
-static int acpi_ac_resume(struct acpi_device *device)
+#ifdef CONFIG_PM_SLEEP
+static int acpi_ac_resume(struct device *dev)
{
struct acpi_ac *ac;
unsigned old_state;
- if (!device || !acpi_driver_data(device))
+
+ if (!dev)
return -EINVAL;
- ac = acpi_driver_data(device);
+
+ ac = acpi_driver_data(to_acpi_device(dev));
+ if (!ac)
+ return -EINVAL;
+
old_state = ac->state;
if (acpi_ac_get_state(ac))
return 0;
@@ -323,8 +393,11 @@ static int acpi_ac_resume(struct acpi_device *device)
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, int type)
+static int acpi_ac_remove(struct acpi_device *device)
{
struct acpi_ac *ac = NULL;
@@ -336,8 +409,10 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
if (ac->charger.dev)
power_supply_unregister(&ac->charger);
+ unregister_acpi_notifier(&ac->battery_nb);
+
#ifdef CONFIG_ACPI_PROCFS_POWER
- acpi_ac_remove_fs(device);
+ acpi_ac_remove_fs(ac);
#endif
kfree(ac);
@@ -358,6 +433,7 @@ static int __init acpi_ac_init(void)
return -ENODEV;
#endif
+
result = acpi_bus_register_driver(&acpi_ac_driver);
if (result < 0) {
#ifdef CONFIG_ACPI_PROCFS_POWER
@@ -371,15 +447,10 @@ static int __init acpi_ac_init(void)
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
-
- return;
}
-
module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 12:07:37 +0000