#include <linux/init.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
-
#define ACPI_FAN_COMPONENT 0x00200000
#define ACPI_FAN_CLASS "fan"
-#define ACPI_FAN_HID "PNP0C0B"
#define ACPI_FAN_DRIVER_NAME "ACPI Fan Driver"
-#define ACPI_FAN_DEVICE_NAME "Fan"
#define ACPI_FAN_FILE_STATE "state"
-#define ACPI_FAN_NOTIFY_STATUS 0x80
#define _COMPONENT ACPI_FAN_COMPONENT
-ACPI_MODULE_NAME ("acpi_fan")
+ACPI_MODULE_NAME("acpi_fan")
-MODULE_AUTHOR("Paul Diefenbaugh");
+ MODULE_AUTHOR("Paul Diefenbaugh");
MODULE_DESCRIPTION(ACPI_FAN_DRIVER_NAME);
MODULE_LICENSE("GPL");
-int acpi_fan_add (struct acpi_device *device);
-int acpi_fan_remove (struct acpi_device *device, int type);
+static int acpi_fan_add(struct acpi_device *device);
+static int acpi_fan_remove(struct acpi_device *device, int type);
+static int acpi_fan_suspend(struct acpi_device *device, int state);
+static int acpi_fan_resume(struct acpi_device *device, int state);
static struct acpi_driver acpi_fan_driver = {
- .name = ACPI_FAN_DRIVER_NAME,
- .class = ACPI_FAN_CLASS,
- .ids = ACPI_FAN_HID,
- .ops = {
- .add = acpi_fan_add,
- .remove = acpi_fan_remove,
- },
+ .name = ACPI_FAN_DRIVER_NAME,
+ .class = ACPI_FAN_CLASS,
+ .ids = "PNP0C0B",
+ .ops = {
+ .add = acpi_fan_add,
+ .remove = acpi_fan_remove,
+ .suspend = acpi_fan_suspend,
+ .resume = acpi_fan_resume,
+ },
};
struct acpi_fan {
- acpi_handle handle;
+ struct acpi_device * device;
};
-
/* --------------------------------------------------------------------------
FS Interface (/proc)
-------------------------------------------------------------------------- */
-struct proc_dir_entry *acpi_fan_dir;
-
+static struct proc_dir_entry *acpi_fan_dir;
-static int
-acpi_fan_read_state (
- char *page,
- char **start,
- off_t off,
- int count,
- int *eof,
- void *data)
+static int acpi_fan_read_state(struct seq_file *seq, void *offset)
{
- struct acpi_fan *fan = (struct acpi_fan *) data;
- char *p = page;
- int len = 0;
- int state = 0;
+ struct acpi_fan *fan = seq->private;
+ int state = 0;
- ACPI_FUNCTION_TRACE("acpi_fan_read_state");
- if (!fan || (off != 0))
- goto end;
-
- if (acpi_bus_get_power(fan->handle, &state))
- goto end;
-
- p += sprintf(p, "status: %s\n",
- !state?"on":"off");
-
-end:
- len = (p - page);
- if (len <= off+count) *eof = 1;
- *start = page + off;
- len -= off;
- if (len>count) len = count;
- if (len<0) len = 0;
-
- return_VALUE(len);
+ if (fan) {
+ if (acpi_bus_get_power(fan->device->handle, &state))
+ seq_printf(seq, "status: ERROR\n");
+ else
+ seq_printf(seq, "status: %s\n",
+ !state ? "on" : "off");
+ }
+ return 0;
}
+static int acpi_fan_state_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_fan_read_state, PDE(inode)->data);
+}
-static int
-acpi_fan_write_state (
- struct file *file,
- const char *buffer,
- unsigned long count,
- void *data)
+static ssize_t
+acpi_fan_write_state(struct file *file, const char __user * buffer,
+ size_t count, loff_t * ppos)
{
- int result = 0;
- struct acpi_fan *fan = (struct acpi_fan *) data;
- char state_string[12] = {'\0'};
+ int result = 0;
+ struct seq_file *m = file->private_data;
+ struct acpi_fan *fan = m->private;
+ char state_string[12] = { '\0' };
- ACPI_FUNCTION_TRACE("acpi_fan_write_state");
if (!fan || (count > sizeof(state_string) - 1))
- return_VALUE(-EINVAL);
-
+ return -EINVAL;
+
if (copy_from_user(state_string, buffer, count))
- return_VALUE(-EFAULT);
-
+ return -EFAULT;
+
state_string[count] = '\0';
-
- result = acpi_bus_set_power(fan->handle,
- simple_strtoul(state_string, NULL, 0));
+
+ result = acpi_bus_set_power(fan->device->handle,
+ simple_strtoul(state_string, NULL, 0));
if (result)
- return_VALUE(result);
+ return result;
- return_VALUE(count);
+ return count;
}
+static const struct file_operations acpi_fan_state_ops = {
+ .open = acpi_fan_state_open_fs,
+ .read = seq_read,
+ .write = acpi_fan_write_state,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .owner = THIS_MODULE,
+};
-static int
-acpi_fan_add_fs (
- struct acpi_device *device)
+static int acpi_fan_add_fs(struct acpi_device *device)
{
- struct proc_dir_entry *entry = NULL;
+ struct proc_dir_entry *entry = NULL;
- ACPI_FUNCTION_TRACE("acpi_fan_add_fs");
if (!device)
- return_VALUE(-EINVAL);
+ return -EINVAL;
if (!acpi_device_dir(device)) {
acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
- acpi_fan_dir);
+ acpi_fan_dir);
if (!acpi_device_dir(device))
- return_VALUE(-ENODEV);
+ return -ENODEV;
acpi_device_dir(device)->owner = THIS_MODULE;
}
/* 'status' [R/W] */
entry = create_proc_entry(ACPI_FAN_FILE_STATE,
- S_IFREG|S_IRUGO|S_IWUSR, acpi_device_dir(device));
+ S_IFREG | S_IRUGO | S_IWUSR,
+ acpi_device_dir(device));
if (!entry)
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Unable to create '%s' fs entry\n",
- ACPI_FAN_FILE_STATE));
+ return -ENODEV;
else {
- entry->read_proc = acpi_fan_read_state;
- entry->write_proc = acpi_fan_write_state;
+ entry->proc_fops = &acpi_fan_state_ops;
entry->data = acpi_driver_data(device);
entry->owner = THIS_MODULE;
}
- return_VALUE(0);
+ return 0;
}
-
-static int
-acpi_fan_remove_fs (
- struct acpi_device *device)
+static int acpi_fan_remove_fs(struct acpi_device *device)
{
- ACPI_FUNCTION_TRACE("acpi_fan_remove_fs");
if (acpi_device_dir(device)) {
+ remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device));
remove_proc_entry(acpi_device_bid(device), acpi_fan_dir);
acpi_device_dir(device) = NULL;
}
- return_VALUE(0);
+ return 0;
}
-
/* --------------------------------------------------------------------------
Driver Interface
-------------------------------------------------------------------------- */
-int
-acpi_fan_add (
- struct acpi_device *device)
+static int acpi_fan_add(struct acpi_device *device)
{
- int result = 0;
- struct acpi_fan *fan = NULL;
- int state = 0;
+ int result = 0;
+ struct acpi_fan *fan = NULL;
+ int state = 0;
- ACPI_FUNCTION_TRACE("acpi_fan_add");
if (!device)
- return_VALUE(-EINVAL);
+ return -EINVAL;
- fan = kmalloc(sizeof(struct acpi_fan), GFP_KERNEL);
+ fan = kzalloc(sizeof(struct acpi_fan), GFP_KERNEL);
if (!fan)
- return_VALUE(-ENOMEM);
- memset(fan, 0, sizeof(struct acpi_fan));
+ return -ENOMEM;
- fan->handle = device->handle;
- strcpy(acpi_device_name(device), ACPI_FAN_DEVICE_NAME);
+ fan->device = device;
+ strcpy(acpi_device_name(device), "Fan");
strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
acpi_driver_data(device) = fan;
- result = acpi_bus_get_power(fan->handle, &state);
+ result = acpi_bus_get_power(device->handle, &state);
if (result) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Error reading power state\n"));
+ printk(KERN_ERR PREFIX "Reading power state\n");
goto end;
}
+ device->flags.force_power_state = 1;
+ acpi_bus_set_power(device->handle, state);
+ device->flags.force_power_state = 0;
+
result = acpi_fan_add_fs(device);
if (result)
goto end;
printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
- acpi_device_name(device), acpi_device_bid(device),
- !device->power.state?"on":"off");
+ acpi_device_name(device), acpi_device_bid(device),
+ !device->power.state ? "on" : "off");
-end:
+ end:
if (result)
kfree(fan);
- return_VALUE(result);
+ return result;
}
-
-int
-acpi_fan_remove (
- struct acpi_device *device,
- int type)
+static int acpi_fan_remove(struct acpi_device *device, int type)
{
- struct acpi_fan *fan = NULL;
+ struct acpi_fan *fan = NULL;
- ACPI_FUNCTION_TRACE("acpi_fan_remove");
if (!device || !acpi_driver_data(device))
- return_VALUE(-EINVAL);
+ return -EINVAL;
- fan = (struct acpi_fan *) acpi_driver_data(device);
+ fan = acpi_driver_data(device);
acpi_fan_remove_fs(device);
kfree(fan);
- return_VALUE(0);
+ return 0;
+}
+
+static int acpi_fan_suspend(struct acpi_device *device, int state)
+{
+ if (!device)
+ return -EINVAL;
+
+ acpi_bus_set_power(device->handle, ACPI_STATE_D0);
+
+ return AE_OK;
}
+static int acpi_fan_resume(struct acpi_device *device, int state)
+{
+ int result = 0;
+ int power_state = 0;
+
+ if (!device)
+ return -EINVAL;
+
+ result = acpi_bus_get_power(device->handle, &power_state);
+ if (result) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error reading fan power state\n"));
+ return result;
+ }
+
+ device->flags.force_power_state = 1;
+ acpi_bus_set_power(device->handle, power_state);
+ device->flags.force_power_state = 0;
-int __init
-acpi_fan_init (void)
+ return result;
+}
+
+static int __init acpi_fan_init(void)
{
- int result = 0;
+ int result = 0;
- ACPI_FUNCTION_TRACE("acpi_fan_init");
acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
if (!acpi_fan_dir)
- return_VALUE(-ENODEV);
+ return -ENODEV;
acpi_fan_dir->owner = THIS_MODULE;
result = acpi_bus_register_driver(&acpi_fan_driver);
if (result < 0) {
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
- return_VALUE(-ENODEV);
+ return -ENODEV;
}
- return_VALUE(0);
+ return 0;
}
-
-void __exit
-acpi_fan_exit (void)
+static void __exit acpi_fan_exit(void)
{
- ACPI_FUNCTION_TRACE("acpi_fan_exit");
acpi_bus_unregister_driver(&acpi_fan_driver);
remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
- return_VOID;
+ return;
}
-
module_init(acpi_fan_init);
module_exit(acpi_fan_exit);
-
git://git.onelab.eu / linux-2.6.git / blobdiff