ACPI: delete tracing macros from drivers/acpi/*.c
[linux-2.6.git] / drivers / acpi / ac.c
1 /*
2  *  acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $)
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 <acpi/acpi_bus.h>
33 #include <acpi/acpi_drivers.h>
34
35 #define ACPI_AC_COMPONENT               0x00020000
36 #define ACPI_AC_CLASS                   "ac_adapter"
37 #define ACPI_AC_HID                     "ACPI0003"
38 #define ACPI_AC_DRIVER_NAME             "ACPI AC Adapter Driver"
39 #define ACPI_AC_DEVICE_NAME             "AC Adapter"
40 #define ACPI_AC_FILE_STATE              "state"
41 #define ACPI_AC_NOTIFY_STATUS           0x80
42 #define ACPI_AC_STATUS_OFFLINE          0x00
43 #define ACPI_AC_STATUS_ONLINE           0x01
44 #define ACPI_AC_STATUS_UNKNOWN          0xFF
45
46 #define _COMPONENT              ACPI_AC_COMPONENT
47 ACPI_MODULE_NAME("acpi_ac")
48
49     MODULE_AUTHOR("Paul Diefenbaugh");
50 MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME);
51 MODULE_LICENSE("GPL");
52
53 static int acpi_ac_add(struct acpi_device *device);
54 static int acpi_ac_remove(struct acpi_device *device, int type);
55 static int acpi_ac_open_fs(struct inode *inode, struct file *file);
56
57 static struct acpi_driver acpi_ac_driver = {
58         .name = ACPI_AC_DRIVER_NAME,
59         .class = ACPI_AC_CLASS,
60         .ids = ACPI_AC_HID,
61         .ops = {
62                 .add = acpi_ac_add,
63                 .remove = acpi_ac_remove,
64                 },
65 };
66
67 struct acpi_ac {
68         acpi_handle handle;
69         unsigned long state;
70 };
71
72 static struct file_operations acpi_ac_fops = {
73         .open = acpi_ac_open_fs,
74         .read = seq_read,
75         .llseek = seq_lseek,
76         .release = single_release,
77 };
78
79 /* --------------------------------------------------------------------------
80                                AC Adapter Management
81    -------------------------------------------------------------------------- */
82
83 static int acpi_ac_get_state(struct acpi_ac *ac)
84 {
85         acpi_status status = AE_OK;
86
87
88         if (!ac)
89                 return -EINVAL;
90
91         status = acpi_evaluate_integer(ac->handle, "_PSR", NULL, &ac->state);
92         if (ACPI_FAILURE(status)) {
93                 ACPI_EXCEPTION((AE_INFO, status, "Error reading AC Adapter state"));
94                 ac->state = ACPI_AC_STATUS_UNKNOWN;
95                 return -ENODEV;
96         }
97
98         return 0;
99 }
100
101 /* --------------------------------------------------------------------------
102                               FS Interface (/proc)
103    -------------------------------------------------------------------------- */
104
105 static struct proc_dir_entry *acpi_ac_dir;
106
107 static int acpi_ac_seq_show(struct seq_file *seq, void *offset)
108 {
109         struct acpi_ac *ac = (struct acpi_ac *)seq->private;
110
111
112         if (!ac)
113                 return 0;
114
115         if (acpi_ac_get_state(ac)) {
116                 seq_puts(seq, "ERROR: Unable to read AC Adapter state\n");
117                 return 0;
118         }
119
120         seq_puts(seq, "state:                   ");
121         switch (ac->state) {
122         case ACPI_AC_STATUS_OFFLINE:
123                 seq_puts(seq, "off-line\n");
124                 break;
125         case ACPI_AC_STATUS_ONLINE:
126                 seq_puts(seq, "on-line\n");
127                 break;
128         default:
129                 seq_puts(seq, "unknown\n");
130                 break;
131         }
132
133         return 0;
134 }
135
136 static int acpi_ac_open_fs(struct inode *inode, struct file *file)
137 {
138         return single_open(file, acpi_ac_seq_show, PDE(inode)->data);
139 }
140
141 static int acpi_ac_add_fs(struct acpi_device *device)
142 {
143         struct proc_dir_entry *entry = NULL;
144
145
146         if (!acpi_device_dir(device)) {
147                 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device),
148                                                      acpi_ac_dir);
149                 if (!acpi_device_dir(device))
150                         return -ENODEV;
151                 acpi_device_dir(device)->owner = THIS_MODULE;
152         }
153
154         /* 'state' [R] */
155         entry = create_proc_entry(ACPI_AC_FILE_STATE,
156                                   S_IRUGO, acpi_device_dir(device));
157         if (!entry)
158                 return -ENODEV;
159         else {
160                 entry->proc_fops = &acpi_ac_fops;
161                 entry->data = acpi_driver_data(device);
162                 entry->owner = THIS_MODULE;
163         }
164
165         return 0;
166 }
167
168 static int acpi_ac_remove_fs(struct acpi_device *device)
169 {
170
171         if (acpi_device_dir(device)) {
172                 remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device));
173
174                 remove_proc_entry(acpi_device_bid(device), acpi_ac_dir);
175                 acpi_device_dir(device) = NULL;
176         }
177
178         return 0;
179 }
180
181 /* --------------------------------------------------------------------------
182                                    Driver Model
183    -------------------------------------------------------------------------- */
184
185 static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
186 {
187         struct acpi_ac *ac = (struct acpi_ac *)data;
188         struct acpi_device *device = NULL;
189
190
191         if (!ac)
192                 return;
193
194         if (acpi_bus_get_device(ac->handle, &device))
195                 return;
196
197         switch (event) {
198         case ACPI_AC_NOTIFY_STATUS:
199                 acpi_ac_get_state(ac);
200                 acpi_bus_generate_event(device, event, (u32) ac->state);
201                 break;
202         default:
203                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
204                                   "Unsupported event [0x%x]\n", event));
205                 break;
206         }
207
208         return;
209 }
210
211 static int acpi_ac_add(struct acpi_device *device)
212 {
213         int result = 0;
214         acpi_status status = AE_OK;
215         struct acpi_ac *ac = NULL;
216
217
218         if (!device)
219                 return -EINVAL;
220
221         ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL);
222         if (!ac)
223                 return -ENOMEM;
224         memset(ac, 0, sizeof(struct acpi_ac));
225
226         ac->handle = device->handle;
227         strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME);
228         strcpy(acpi_device_class(device), ACPI_AC_CLASS);
229         acpi_driver_data(device) = ac;
230
231         result = acpi_ac_get_state(ac);
232         if (result)
233                 goto end;
234
235         result = acpi_ac_add_fs(device);
236         if (result)
237                 goto end;
238
239         status = acpi_install_notify_handler(ac->handle,
240                                              ACPI_DEVICE_NOTIFY, acpi_ac_notify,
241                                              ac);
242         if (ACPI_FAILURE(status)) {
243                 result = -ENODEV;
244                 goto end;
245         }
246
247         printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
248                acpi_device_name(device), acpi_device_bid(device),
249                ac->state ? "on-line" : "off-line");
250
251       end:
252         if (result) {
253                 acpi_ac_remove_fs(device);
254                 kfree(ac);
255         }
256
257         return result;
258 }
259
260 static int acpi_ac_remove(struct acpi_device *device, int type)
261 {
262         acpi_status status = AE_OK;
263         struct acpi_ac *ac = NULL;
264
265
266         if (!device || !acpi_driver_data(device))
267                 return -EINVAL;
268
269         ac = (struct acpi_ac *)acpi_driver_data(device);
270
271         status = acpi_remove_notify_handler(ac->handle,
272                                             ACPI_DEVICE_NOTIFY, acpi_ac_notify);
273
274         acpi_ac_remove_fs(device);
275
276         kfree(ac);
277
278         return 0;
279 }
280
281 static int __init acpi_ac_init(void)
282 {
283         int result = 0;
284
285
286         acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir);
287         if (!acpi_ac_dir)
288                 return -ENODEV;
289         acpi_ac_dir->owner = THIS_MODULE;
290
291         result = acpi_bus_register_driver(&acpi_ac_driver);
292         if (result < 0) {
293                 remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
294                 return -ENODEV;
295         }
296
297         return 0;
298 }
299
300 static void __exit acpi_ac_exit(void)
301 {
302
303         acpi_bus_unregister_driver(&acpi_ac_driver);
304
305         remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir);
306
307         return;
308 }
309
310 module_init(acpi_ac_init);
311 module_exit(acpi_ac_exit);