1 files changed, 302 insertions, 0 deletions
diff --git a/drivers/acpi/fan.c b/drivers/acpi/fan.c
new file mode 100644
index 000000000000..14192ee55f8f
--- /dev/null
+++ b/drivers/acpi/fan.c
@@ -0,0 +1,302 @@
+/*
+ *  acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
+ *
+ *  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.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#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")
+
+MODULE_AUTHOR("Paul Diefenbaugh");
+MODULE_DESCRIPTION(ACPI_FAN_DRIVER_NAME);
+MODULE_LICENSE("GPL");
+
+static int acpi_fan_add (struct acpi_device *device);
+static int acpi_fan_remove (struct acpi_device *device, int type);
+
+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,
+			},
+};
+
+struct acpi_fan {
+	acpi_handle		handle;
+};
+
+
+/* --------------------------------------------------------------------------
+                              FS Interface (/proc)
+   -------------------------------------------------------------------------- */
+
+static struct proc_dir_entry	*acpi_fan_dir;
+
+
+static int
+acpi_fan_read_state (struct seq_file *seq, void *offset)
+{
+	struct acpi_fan		*fan = seq->private;
+	int			state = 0;
+
+	ACPI_FUNCTION_TRACE("acpi_fan_read_state");
+
+	if (fan) {
+		if (acpi_bus_get_power(fan->handle, &state))
+			seq_printf(seq, "status:                  ERROR\n");
+		else
+			seq_printf(seq, "status:                  %s\n",
+				     !state?"on":"off");
+	}
+	return_VALUE(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 ssize_t
+acpi_fan_write_state (
+	struct file		*file,
+	const char		__user *buffer,
+	size_t			count,
+	loff_t			*ppos)
+{
+	int			result = 0;
+	struct seq_file		*m = (struct seq_file *)file->private_data;
+	struct acpi_fan		*fan = (struct acpi_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);
+	
+	if (copy_from_user(state_string, buffer, count))
+		return_VALUE(-EFAULT);
+	
+	state_string[count] = '\0';
+	
+	result = acpi_bus_set_power(fan->handle, 
+		simple_strtoul(state_string, NULL, 0));
+	if (result)
+		return_VALUE(result);
+
+	return_VALUE(count);
+}
+
+static 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)
+{
+	struct proc_dir_entry	*entry = NULL;
+
+	ACPI_FUNCTION_TRACE("acpi_fan_add_fs");
+
+	if (!device)
+		return_VALUE(-EINVAL);
+
+	if (!acpi_device_dir(device)) {
+		acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
+			acpi_fan_dir);
+		if (!acpi_device_dir(device))
+			return_VALUE(-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));
+	if (!entry)
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+			"Unable to create '%s' fs entry\n",
+			ACPI_FAN_FILE_STATE));
+	else {
+		entry->proc_fops = &acpi_fan_state_ops;
+		entry->data = acpi_driver_data(device);
+		entry->owner = THIS_MODULE;
+	}
+
+	return_VALUE(0);
+}
+
+
+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);
+}
+
+
+/* --------------------------------------------------------------------------
+                                 Driver Interface
+   -------------------------------------------------------------------------- */
+
+static int
+acpi_fan_add (
+	struct acpi_device	*device)
+{
+	int			result = 0;
+	struct acpi_fan		*fan = NULL;
+	int			state = 0;
+
+	ACPI_FUNCTION_TRACE("acpi_fan_add");
+
+	if (!device)
+		return_VALUE(-EINVAL);
+
+	fan = kmalloc(sizeof(struct acpi_fan), GFP_KERNEL);
+	if (!fan)
+		return_VALUE(-ENOMEM);
+	memset(fan, 0, sizeof(struct acpi_fan));
+
+	fan->handle = device->handle;
+	strcpy(acpi_device_name(device), ACPI_FAN_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
+	acpi_driver_data(device) = fan;
+
+	result = acpi_bus_get_power(fan->handle, &state);
+	if (result) {
+		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+			"Error reading power state\n"));
+		goto end;
+	}
+
+	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");
+
+end:
+	if (result)
+		kfree(fan);
+
+	return_VALUE(result);
+}
+
+
+static int
+acpi_fan_remove (
+	struct acpi_device	*device,
+	int			type)
+{
+	struct acpi_fan		*fan = NULL;
+
+	ACPI_FUNCTION_TRACE("acpi_fan_remove");
+
+	if (!device || !acpi_driver_data(device))
+		return_VALUE(-EINVAL);
+
+	fan = (struct acpi_fan *) acpi_driver_data(device);
+
+	acpi_fan_remove_fs(device);
+
+	kfree(fan);
+
+	return_VALUE(0);
+}
+
+
+static int __init
+acpi_fan_init (void)
+{
+	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);
+	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_VALUE(0);
+}
+
+
+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;
+}
+
+
+module_init(acpi_fan_init);
+module_exit(acpi_fan_exit);
+