ACPI: delete extra #defines in /drivers/acpi/ drivers
[linux-2.6.git] / drivers / acpi / fan.c
1 /*
2  *  acpi_fan.c - ACPI Fan Driver ($Revision: 29 $)
3  *
4  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6  *
7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8  *
9  *  This program is free software; you can redistribute it and/or modify
10  *  it under the terms of the GNU General Public License as published by
11  *  the Free Software Foundation; either version 2 of the License, or (at
12  *  your option) any later version.
13  *
14  *  This program is distributed in the hope that it will be useful, but
15  *  WITHOUT ANY WARRANTY; without even the implied warranty of
16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  *  General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License along
20  *  with this program; if not, write to the Free Software Foundation, Inc.,
21  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
22  *
23  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
24  */
25
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/types.h>
30 #include <linux/proc_fs.h>
31 #include <linux/seq_file.h>
32 #include <asm/uaccess.h>
33
34 #include <acpi/acpi_bus.h>
35 #include <acpi/acpi_drivers.h>
36
37 #define ACPI_FAN_COMPONENT              0x00200000
38 #define ACPI_FAN_CLASS                  "fan"
39 #define ACPI_FAN_FILE_STATE             "state"
40
41 #define _COMPONENT              ACPI_FAN_COMPONENT
42 ACPI_MODULE_NAME("fan");
43
44 MODULE_AUTHOR("Paul Diefenbaugh");
45 MODULE_DESCRIPTION("ACPI Fan Driver");
46 MODULE_LICENSE("GPL");
47
48 static int acpi_fan_add(struct acpi_device *device);
49 static int acpi_fan_remove(struct acpi_device *device, int type);
50 static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state);
51 static int acpi_fan_resume(struct acpi_device *device);
52
53 static struct acpi_driver acpi_fan_driver = {
54         .name = "fan",
55         .class = ACPI_FAN_CLASS,
56         .ids = "PNP0C0B",
57         .ops = {
58                 .add = acpi_fan_add,
59                 .remove = acpi_fan_remove,
60                 .suspend = acpi_fan_suspend,
61                 .resume = acpi_fan_resume,
62                 },
63 };
64
65 struct acpi_fan {
66         struct acpi_device * device;
67 };
68
69 /* --------------------------------------------------------------------------
70                               FS Interface (/proc)
71    -------------------------------------------------------------------------- */
72
73 static struct proc_dir_entry *acpi_fan_dir;
74
75 static int acpi_fan_read_state(struct seq_file *seq, void *offset)
76 {
77         struct acpi_fan *fan = seq->private;
78         int state = 0;
79
80
81         if (fan) {
82                 if (acpi_bus_get_power(fan->device->handle, &state))
83                         seq_printf(seq, "status:                  ERROR\n");
84                 else
85                         seq_printf(seq, "status:                  %s\n",
86                                    !state ? "on" : "off");
87         }
88         return 0;
89 }
90
91 static int acpi_fan_state_open_fs(struct inode *inode, struct file *file)
92 {
93         return single_open(file, acpi_fan_read_state, PDE(inode)->data);
94 }
95
96 static ssize_t
97 acpi_fan_write_state(struct file *file, const char __user * buffer,
98                      size_t count, loff_t * ppos)
99 {
100         int result = 0;
101         struct seq_file *m = file->private_data;
102         struct acpi_fan *fan = m->private;
103         char state_string[12] = { '\0' };
104
105
106         if (!fan || (count > sizeof(state_string) - 1))
107                 return -EINVAL;
108
109         if (copy_from_user(state_string, buffer, count))
110                 return -EFAULT;
111
112         state_string[count] = '\0';
113
114         result = acpi_bus_set_power(fan->device->handle,
115                                     simple_strtoul(state_string, NULL, 0));
116         if (result)
117                 return result;
118
119         return count;
120 }
121
122 static const struct file_operations acpi_fan_state_ops = {
123         .open = acpi_fan_state_open_fs,
124         .read = seq_read,
125         .write = acpi_fan_write_state,
126         .llseek = seq_lseek,
127         .release = single_release,
128         .owner = THIS_MODULE,
129 };
130
131 static int acpi_fan_add_fs(struct acpi_device *device)
132 {
133         struct proc_dir_entry *entry = NULL;
134
135
136         if (!device)
137                 return -EINVAL;
138
139         if (!acpi_device_dir(device)) {
140                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
141                                                      acpi_fan_dir);
142                 if (!acpi_device_dir(device))
143                         return -ENODEV;
144                 acpi_device_dir(device)->owner = THIS_MODULE;
145         }
146
147         /* 'status' [R/W] */
148         entry = create_proc_entry(ACPI_FAN_FILE_STATE,
149                                   S_IFREG | S_IRUGO | S_IWUSR,
150                                   acpi_device_dir(device));
151         if (!entry)
152                 return -ENODEV;
153         else {
154                 entry->proc_fops = &acpi_fan_state_ops;
155                 entry->data = acpi_driver_data(device);
156                 entry->owner = THIS_MODULE;
157         }
158
159         return 0;
160 }
161
162 static int acpi_fan_remove_fs(struct acpi_device *device)
163 {
164
165         if (acpi_device_dir(device)) {
166                 remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device));
167                 remove_proc_entry(acpi_device_bid(device), acpi_fan_dir);
168                 acpi_device_dir(device) = NULL;
169         }
170
171         return 0;
172 }
173
174 /* --------------------------------------------------------------------------
175                                  Driver Interface
176    -------------------------------------------------------------------------- */
177
178 static int acpi_fan_add(struct acpi_device *device)
179 {
180         int result = 0;
181         struct acpi_fan *fan = NULL;
182         int state = 0;
183
184
185         if (!device)
186                 return -EINVAL;
187
188         fan = kzalloc(sizeof(struct acpi_fan), GFP_KERNEL);
189         if (!fan)
190                 return -ENOMEM;
191
192         fan->device = device;
193         strcpy(acpi_device_name(device), "Fan");
194         strcpy(acpi_device_class(device), ACPI_FAN_CLASS);
195         acpi_driver_data(device) = fan;
196
197         result = acpi_bus_get_power(device->handle, &state);
198         if (result) {
199                 printk(KERN_ERR PREFIX "Reading power state\n");
200                 goto end;
201         }
202
203         device->flags.force_power_state = 1;
204         acpi_bus_set_power(device->handle, state);
205         device->flags.force_power_state = 0;
206
207         result = acpi_fan_add_fs(device);
208         if (result)
209                 goto end;
210
211         printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
212                acpi_device_name(device), acpi_device_bid(device),
213                !device->power.state ? "on" : "off");
214
215       end:
216         if (result)
217                 kfree(fan);
218
219         return result;
220 }
221
222 static int acpi_fan_remove(struct acpi_device *device, int type)
223 {
224         struct acpi_fan *fan = NULL;
225
226
227         if (!device || !acpi_driver_data(device))
228                 return -EINVAL;
229
230         fan = acpi_driver_data(device);
231
232         acpi_fan_remove_fs(device);
233
234         kfree(fan);
235
236         return 0;
237 }
238
239 static int acpi_fan_suspend(struct acpi_device *device, pm_message_t state)
240 {
241         if (!device)
242                 return -EINVAL;
243
244         acpi_bus_set_power(device->handle, ACPI_STATE_D0);
245
246         return AE_OK;
247 }
248
249 static int acpi_fan_resume(struct acpi_device *device)
250 {
251         int result = 0;
252         int power_state = 0;
253
254         if (!device)
255                 return -EINVAL;
256
257         result = acpi_bus_get_power(device->handle, &power_state);
258         if (result) {
259                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
260                                   "Error reading fan power state\n"));
261                 return result;
262         }
263
264         device->flags.force_power_state = 1;
265         acpi_bus_set_power(device->handle, power_state);
266         device->flags.force_power_state = 0;
267
268         return result;
269 }
270
271 static int __init acpi_fan_init(void)
272 {
273         int result = 0;
274
275
276         acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir);
277         if (!acpi_fan_dir)
278                 return -ENODEV;
279         acpi_fan_dir->owner = THIS_MODULE;
280
281         result = acpi_bus_register_driver(&acpi_fan_driver);
282         if (result < 0) {
283                 remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
284                 return -ENODEV;
285         }
286
287         return 0;
288 }
289
290 static void __exit acpi_fan_exit(void)
291 {
292
293         acpi_bus_unregister_driver(&acpi_fan_driver);
294
295         remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir);
296
297         return;
298 }
299
300 module_init(acpi_fan_init);
301 module_exit(acpi_fan_exit);