#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
-
#define ACPI_AC_COMPONENT 0x00020000
#define ACPI_AC_CLASS "ac_adapter"
#define ACPI_AC_HID "ACPI0003"
#define ACPI_AC_STATUS_UNKNOWN 0xFF
#define _COMPONENT ACPI_AC_COMPONENT
-ACPI_MODULE_NAME ("acpi_ac")
+ACPI_MODULE_NAME("acpi_ac")
-MODULE_AUTHOR("Paul Diefenbaugh");
+ MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME);
MODULE_LICENSE("GPL");
-int acpi_ac_add (struct acpi_device *device);
-int acpi_ac_remove (struct acpi_device *device, int type);
+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_add(struct acpi_device *device);
+static int acpi_ac_remove(struct acpi_device *device, int type);
static int acpi_ac_open_fs(struct inode *inode, struct file *file);
static struct acpi_driver acpi_ac_driver = {
- .name = ACPI_AC_DRIVER_NAME,
- .class = ACPI_AC_CLASS,
- .ids = ACPI_AC_HID,
- .ops = {
- .add = acpi_ac_add,
- .remove = acpi_ac_remove,
- },
+ .name = ACPI_AC_DRIVER_NAME,
+ .class = ACPI_AC_CLASS,
+ .ids = ACPI_AC_HID,
+ .ops = {
+ .add = acpi_ac_add,
+ .remove = acpi_ac_remove,
+ },
};
struct acpi_ac {
- acpi_handle handle;
- unsigned long state;
+ struct acpi_device * device;
+ unsigned long state;
};
-static struct file_operations acpi_ac_fops = {
- .open = acpi_ac_open_fs,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
+static const struct file_operations acpi_ac_fops = {
+ .open = acpi_ac_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
};
/* --------------------------------------------------------------------------
AC Adapter Management
-------------------------------------------------------------------------- */
-static int
-acpi_ac_get_state (
- struct acpi_ac *ac)
+static int acpi_ac_get_state(struct acpi_ac *ac)
{
- acpi_status status = AE_OK;
+ acpi_status status = AE_OK;
- ACPI_FUNCTION_TRACE("acpi_ac_get_state");
if (!ac)
- return_VALUE(-EINVAL);
+ return -EINVAL;
- status = acpi_evaluate_integer(ac->handle, "_PSR", NULL, &ac->state);
+ status = acpi_evaluate_integer(ac->device->handle, "_PSR", NULL, &ac->state);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error reading AC Adapter state\n"));
+ ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
ac->state = ACPI_AC_STATUS_UNKNOWN;
- return_VALUE(-ENODEV);
+ return -ENODEV;
}
-
- return_VALUE(0);
-}
+ return 0;
+}
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
-struct proc_dir_entry *acpi_ac_dir;
+static struct proc_dir_entry *acpi_ac_dir;
-int acpi_ac_seq_show(struct seq_file *seq, void *offset)
+static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
{
- struct acpi_ac *ac = (struct acpi_ac *) seq->private;
+ struct acpi_ac *ac = seq->private;
- ACPI_FUNCTION_TRACE("acpi_ac_seq_show");
if (!ac)
- return_VALUE(0);
+ return 0;
if (acpi_ac_get_state(ac)) {
seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
- return_VALUE(0);
+ return 0;
}
seq_puts(seq, "state: ");
break;
}
- return_VALUE(0);
+ return 0;
}
-
+
static int acpi_ac_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
}
-static int
-acpi_ac_add_fs (
- struct acpi_device *device)
+static int acpi_ac_add_fs(struct acpi_device *device)
{
- struct proc_dir_entry *entry = NULL;
+ struct proc_dir_entry *entry = NULL;
- ACPI_FUNCTION_TRACE("acpi_ac_add_fs");
if (!acpi_device_dir(device)) {
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
- acpi_ac_dir);
+ acpi_ac_dir);
if (!acpi_device_dir(device))
- return_VALUE(-ENODEV);
+ return -ENODEV;
acpi_device_dir(device)->owner = THIS_MODULE;
}
/* 'state' [R] */
entry = create_proc_entry(ACPI_AC_FILE_STATE,
- S_IRUGO, acpi_device_dir(device));
+ S_IRUGO, acpi_device_dir(device));
if (!entry)
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Unable to create '%s' fs entry\n",
- ACPI_AC_FILE_STATE));
+ return -ENODEV;
else {
entry->proc_fops = &acpi_ac_fops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
- return_VALUE(0);
+ return 0;
}
-
-static int
-acpi_ac_remove_fs (
- struct acpi_device *device)
+static int acpi_ac_remove_fs(struct acpi_device *device)
{
- ACPI_FUNCTION_TRACE("acpi_ac_remove_fs");
if (acpi_device_dir(device)) {
- remove_proc_entry(ACPI_AC_FILE_STATE,
- 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;
}
- return_VALUE(0);
+ return 0;
}
-
/* --------------------------------------------------------------------------
Driver Model
-------------------------------------------------------------------------- */
-void
-acpi_ac_notify (
- acpi_handle handle,
- u32 event,
- void *data)
+static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
{
- struct acpi_ac *ac = (struct acpi_ac *) data;
- struct acpi_device *device = NULL;
+ struct acpi_ac *ac = data;
+ struct acpi_device *device = NULL;
- ACPI_FUNCTION_TRACE("acpi_ac_notify");
if (!ac)
- return_VOID;
-
- if (acpi_bus_get_device(ac->handle, &device))
- return_VOID;
+ return;
+ device = ac->device;
switch (event) {
case ACPI_AC_NOTIFY_STATUS:
+ case ACPI_NOTIFY_BUS_CHECK:
+ case ACPI_NOTIFY_DEVICE_CHECK:
acpi_ac_get_state(ac);
acpi_bus_generate_event(device, event, (u32) ac->state);
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
- "Unsupported event [0x%x]\n", event));
+ "Unsupported event [0x%x]\n", event));
break;
}
- return_VOID;
+ return;
}
-
-int
-acpi_ac_add (
- struct acpi_device *device)
+static int acpi_ac_add(struct acpi_device *device)
{
- int result = 0;
- acpi_status status = AE_OK;
- struct acpi_ac *ac = NULL;
+ int result = 0;
+ acpi_status status = AE_OK;
+ struct acpi_ac *ac = NULL;
- ACPI_FUNCTION_TRACE("acpi_ac_add");
if (!device)
- return_VALUE(-EINVAL);
+ return -EINVAL;
- ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
+ ac = kzalloc(sizeof(struct acpi_ac), GFP_KERNEL);
if (!ac)
- return_VALUE(-ENOMEM);
- memset(ac, 0, sizeof(struct acpi_ac));
+ return -ENOMEM;
- ac->handle = device->handle;
+ ac->device = device;
strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
strcpy(acpi_device_class(device), ACPI_AC_CLASS);
acpi_driver_data(device) = ac;
if (result)
goto end;
- status = acpi_install_notify_handler(ac->handle,
- ACPI_DEVICE_NOTIFY, acpi_ac_notify, ac);
+ status = acpi_install_notify_handler(device->handle,
+ ACPI_ALL_NOTIFY, acpi_ac_notify,
+ ac);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error installing notify handler\n"));
result = -ENODEV;
goto end;
}
- printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
- acpi_device_name(device), acpi_device_bid(device),
- ac->state?"on-line":"off-line");
+ printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+ acpi_device_name(device), acpi_device_bid(device),
+ ac->state ? "on-line" : "off-line");
-end:
+ end:
if (result) {
acpi_ac_remove_fs(device);
kfree(ac);
}
- return_VALUE(result);
+ return result;
}
-
-int
-acpi_ac_remove (
- struct acpi_device *device,
- int type)
+static int acpi_ac_remove(struct acpi_device *device, int type)
{
- acpi_status status = AE_OK;
- struct acpi_ac *ac = NULL;
+ acpi_status status = AE_OK;
+ struct acpi_ac *ac = NULL;
- ACPI_FUNCTION_TRACE("acpi_ac_remove");
if (!device || !acpi_driver_data(device))
- return_VALUE(-EINVAL);
+ return -EINVAL;
- ac = (struct acpi_ac *) acpi_driver_data(device);
+ ac = acpi_driver_data(device);
- status = acpi_remove_notify_handler(ac->handle,
- ACPI_DEVICE_NOTIFY, acpi_ac_notify);
- if (ACPI_FAILURE(status))
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error removing notify handler\n"));
+ status = acpi_remove_notify_handler(device->handle,
+ ACPI_ALL_NOTIFY, acpi_ac_notify);
acpi_ac_remove_fs(device);
kfree(ac);
- return_VALUE(0);
+ return 0;
}
-
-int __init
-acpi_ac_init (void)
+static int __init acpi_ac_init(void)
{
- int result = 0;
+ int result;
- ACPI_FUNCTION_TRACE("acpi_ac_init");
+ if (acpi_disabled)
+ return -ENODEV;
- acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
+ acpi_ac_dir = acpi_lock_ac_dir();
if (!acpi_ac_dir)
- return_VALUE(-ENODEV);
- acpi_ac_dir->owner = THIS_MODULE;
+ return -ENODEV;
result = acpi_bus_register_driver(&acpi_ac_driver);
if (result < 0) {
- remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
- return_VALUE(-ENODEV);
+ acpi_unlock_ac_dir(acpi_ac_dir);
+ return -ENODEV;
}
- return_VALUE(0);
+ return 0;
}
-
-void __exit
-acpi_ac_exit (void)
+static void __exit acpi_ac_exit(void)
{
- ACPI_FUNCTION_TRACE("acpi_ac_exit");
acpi_bus_unregister_driver(&acpi_ac_driver);
- remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
+ acpi_unlock_ac_dir(acpi_ac_dir);
- return_VOID;
+ return;
}
-
module_init(acpi_ac_init);
module_exit(acpi_ac_exit);
git://git.onelab.eu / linux-2.6.git / blobdiff