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path: root/drivers/acpi/button.c
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Diffstat (limited to 'drivers/acpi/button.c')
-rw-r--r--drivers/acpi/button.c206
1 files changed, 205 insertions, 1 deletions
diff --git a/drivers/acpi/button.c b/drivers/acpi/button.c
index 0f45d45f05a0..8162fd0c21a7 100644
--- a/drivers/acpi/button.c
+++ b/drivers/acpi/button.c
@@ -26,6 +26,9 @@
26#include <linux/kernel.h> 26#include <linux/kernel.h>
27#include <linux/module.h> 27#include <linux/module.h>
28#include <linux/init.h> 28#include <linux/init.h>
29#include <linux/types.h>
30#include <linux/proc_fs.h>
31#include <linux/seq_file.h>
29#include <acpi/acpi_bus.h> 32#include <acpi/acpi_bus.h>
30#include <acpi/acpi_drivers.h> 33#include <acpi/acpi_drivers.h>
31 34
@@ -33,6 +36,9 @@
33#define ACPI_BUTTON_COMPONENT 0x00080000 36#define ACPI_BUTTON_COMPONENT 0x00080000
34#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver" 37#define ACPI_BUTTON_DRIVER_NAME "ACPI Button Driver"
35#define ACPI_BUTTON_CLASS "button" 38#define ACPI_BUTTON_CLASS "button"
39#define ACPI_BUTTON_FILE_INFO "info"
40#define ACPI_BUTTON_FILE_STATE "state"
41#define ACPI_BUTTON_TYPE_UNKNOWN 0x00
36#define ACPI_BUTTON_NOTIFY_STATUS 0x80 42#define ACPI_BUTTON_NOTIFY_STATUS 0x80
37 43
38#define ACPI_BUTTON_SUBCLASS_POWER "power" 44#define ACPI_BUTTON_SUBCLASS_POWER "power"
@@ -64,6 +70,8 @@ MODULE_LICENSE("GPL");
64 70
65static int acpi_button_add (struct acpi_device *device); 71static int acpi_button_add (struct acpi_device *device);
66static int acpi_button_remove (struct acpi_device *device, int type); 72static int acpi_button_remove (struct acpi_device *device, int type);
73static int acpi_button_info_open_fs(struct inode *inode, struct file *file);
74static int acpi_button_state_open_fs(struct inode *inode, struct file *file);
67 75
68static struct acpi_driver acpi_button_driver = { 76static struct acpi_driver acpi_button_driver = {
69 .name = ACPI_BUTTON_DRIVER_NAME, 77 .name = ACPI_BUTTON_DRIVER_NAME,
@@ -82,6 +90,179 @@ struct acpi_button {
82 unsigned long pushed; 90 unsigned long pushed;
83}; 91};
84 92
93static struct file_operations acpi_button_info_fops = {
94 .open = acpi_button_info_open_fs,
95 .read = seq_read,
96 .llseek = seq_lseek,
97 .release = single_release,
98};
99
100static struct file_operations acpi_button_state_fops = {
101 .open = acpi_button_state_open_fs,
102 .read = seq_read,
103 .llseek = seq_lseek,
104 .release = single_release,
105};
106/* --------------------------------------------------------------------------
107 FS Interface (/proc)
108 -------------------------------------------------------------------------- */
109
110static struct proc_dir_entry *acpi_button_dir;
111
112static int acpi_button_info_seq_show(struct seq_file *seq, void *offset)
113{
114 struct acpi_button *button = (struct acpi_button *) seq->private;
115
116 ACPI_FUNCTION_TRACE("acpi_button_info_seq_show");
117
118 if (!button || !button->device)
119 return_VALUE(0);
120
121 seq_printf(seq, "type: %s\n",
122 acpi_device_name(button->device));
123
124 return_VALUE(0);
125}
126
127static int acpi_button_info_open_fs(struct inode *inode, struct file *file)
128{
129 return single_open(file, acpi_button_info_seq_show, PDE(inode)->data);
130}
131
132static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)
133{
134 struct acpi_button *button = (struct acpi_button *) seq->private;
135 acpi_status status;
136 unsigned long state;
137
138 ACPI_FUNCTION_TRACE("acpi_button_state_seq_show");
139
140 if (!button || !button->device)
141 return_VALUE(0);
142
143 status = acpi_evaluate_integer(button->handle,"_LID",NULL,&state);
144 if (ACPI_FAILURE(status)) {
145 seq_printf(seq, "state: unsupported\n");
146 }
147 else{
148 seq_printf(seq, "state: %s\n", (state ? "open" : "closed"));
149 }
150
151 return_VALUE(0);
152}
153
154static int acpi_button_state_open_fs(struct inode *inode, struct file *file)
155{
156 return single_open(file, acpi_button_state_seq_show, PDE(inode)->data);
157}
158
159static struct proc_dir_entry *acpi_power_dir;
160static struct proc_dir_entry *acpi_sleep_dir;
161static struct proc_dir_entry *acpi_lid_dir;
162
163static int
164acpi_button_add_fs (
165 struct acpi_device *device)
166{
167 struct proc_dir_entry *entry = NULL;
168 struct acpi_button *button = NULL;
169
170 ACPI_FUNCTION_TRACE("acpi_button_add_fs");
171
172 if (!device || !acpi_driver_data(device))
173 return_VALUE(-EINVAL);
174
175 button = acpi_driver_data(device);
176
177 switch (button->type) {
178 case ACPI_BUTTON_TYPE_POWER:
179 case ACPI_BUTTON_TYPE_POWERF:
180 if (!acpi_power_dir)
181 acpi_power_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_POWER,
182 acpi_button_dir);
183 entry = acpi_power_dir;
184 break;
185 case ACPI_BUTTON_TYPE_SLEEP:
186 case ACPI_BUTTON_TYPE_SLEEPF:
187 if (!acpi_sleep_dir)
188 acpi_sleep_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_SLEEP,
189 acpi_button_dir);
190 entry = acpi_sleep_dir;
191 break;
192 case ACPI_BUTTON_TYPE_LID:
193 if (!acpi_lid_dir)
194 acpi_lid_dir = proc_mkdir(ACPI_BUTTON_SUBCLASS_LID,
195 acpi_button_dir);
196 entry = acpi_lid_dir;
197 break;
198 }
199
200 if (!entry)
201 return_VALUE(-ENODEV);
202 entry->owner = THIS_MODULE;
203
204 acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), entry);
205 if (!acpi_device_dir(device))
206 return_VALUE(-ENODEV);
207 acpi_device_dir(device)->owner = THIS_MODULE;
208
209 /* 'info' [R] */
210 entry = create_proc_entry(ACPI_BUTTON_FILE_INFO,
211 S_IRUGO, acpi_device_dir(device));
212 if (!entry)
213 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
214 "Unable to create '%s' fs entry\n",
215 ACPI_BUTTON_FILE_INFO));
216 else {
217 entry->proc_fops = &acpi_button_info_fops;
218 entry->data = acpi_driver_data(device);
219 entry->owner = THIS_MODULE;
220 }
221
222 /* show lid state [R] */
223 if (button->type == ACPI_BUTTON_TYPE_LID) {
224 entry = create_proc_entry(ACPI_BUTTON_FILE_STATE,
225 S_IRUGO, acpi_device_dir(device));
226 if (!entry)
227 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
228 "Unable to create '%s' fs entry\n",
229 ACPI_BUTTON_FILE_INFO));
230 else {
231 entry->proc_fops = &acpi_button_state_fops;
232 entry->data = acpi_driver_data(device);
233 entry->owner = THIS_MODULE;
234 }
235 }
236
237 return_VALUE(0);
238}
239
240
241static int
242acpi_button_remove_fs (
243 struct acpi_device *device)
244{
245 struct acpi_button *button = NULL;
246
247 ACPI_FUNCTION_TRACE("acpi_button_remove_fs");
248
249 button = acpi_driver_data(device);
250 if (acpi_device_dir(device)) {
251 if (button->type == ACPI_BUTTON_TYPE_LID)
252 remove_proc_entry(ACPI_BUTTON_FILE_STATE,
253 acpi_device_dir(device));
254 remove_proc_entry(ACPI_BUTTON_FILE_INFO,
255 acpi_device_dir(device));
256
257 remove_proc_entry(acpi_device_bid(device),
258 acpi_device_dir(device)->parent);
259 acpi_device_dir(device) = NULL;
260 }
261
262 return_VALUE(0);
263}
264
265
85/* -------------------------------------------------------------------------- 266/* --------------------------------------------------------------------------
86 Driver Interface 267 Driver Interface
87 -------------------------------------------------------------------------- */ 268 -------------------------------------------------------------------------- */
@@ -121,7 +302,8 @@ acpi_button_notify_fixed (
121 302
122 ACPI_FUNCTION_TRACE("acpi_button_notify_fixed"); 303 ACPI_FUNCTION_TRACE("acpi_button_notify_fixed");
123 304
124 BUG_ON(!button); 305 if (!button)
306 return_ACPI_STATUS(AE_BAD_PARAMETER);
125 307
126 acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button); 308 acpi_button_notify(button->handle, ACPI_BUTTON_NOTIFY_STATUS, button);
127 309
@@ -197,6 +379,10 @@ acpi_button_add (
197 goto end; 379 goto end;
198 } 380 }
199 381
382 result = acpi_button_add_fs(device);
383 if (result)
384 goto end;
385
200 switch (button->type) { 386 switch (button->type) {
201 case ACPI_BUTTON_TYPE_POWERF: 387 case ACPI_BUTTON_TYPE_POWERF:
202 status = acpi_install_fixed_event_handler ( 388 status = acpi_install_fixed_event_handler (
@@ -240,6 +426,7 @@ acpi_button_add (
240 426
241end: 427end:
242 if (result) { 428 if (result) {
429 acpi_button_remove_fs(device);
243 kfree(button); 430 kfree(button);
244 } 431 }
245 432
@@ -280,6 +467,8 @@ acpi_button_remove (struct acpi_device *device, int type)
280 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 467 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
281 "Error removing notify handler\n")); 468 "Error removing notify handler\n"));
282 469
470 acpi_button_remove_fs(device);
471
283 kfree(button); 472 kfree(button);
284 473
285 return_VALUE(0); 474 return_VALUE(0);
@@ -293,14 +482,20 @@ acpi_button_init (void)
293 482
294 ACPI_FUNCTION_TRACE("acpi_button_init"); 483 ACPI_FUNCTION_TRACE("acpi_button_init");
295 484
485 acpi_button_dir = proc_mkdir(ACPI_BUTTON_CLASS, acpi_root_dir);
486 if (!acpi_button_dir)
487 return_VALUE(-ENODEV);
488 acpi_button_dir->owner = THIS_MODULE;
296 result = acpi_bus_register_driver(&acpi_button_driver); 489 result = acpi_bus_register_driver(&acpi_button_driver);
297 if (result < 0) { 490 if (result < 0) {
491 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
298 return_VALUE(-ENODEV); 492 return_VALUE(-ENODEV);
299 } 493 }
300 494
301 return_VALUE(0); 495 return_VALUE(0);
302} 496}
303 497
498
304static void __exit 499static void __exit
305acpi_button_exit (void) 500acpi_button_exit (void)
306{ 501{
@@ -308,8 +503,17 @@ acpi_button_exit (void)
308 503
309 acpi_bus_unregister_driver(&acpi_button_driver); 504 acpi_bus_unregister_driver(&acpi_button_driver);
310 505
506 if (acpi_power_dir)
507 remove_proc_entry(ACPI_BUTTON_SUBCLASS_POWER, acpi_button_dir);
508 if (acpi_sleep_dir)
509 remove_proc_entry(ACPI_BUTTON_SUBCLASS_SLEEP, acpi_button_dir);
510 if (acpi_lid_dir)
511 remove_proc_entry(ACPI_BUTTON_SUBCLASS_LID, acpi_button_dir);
512 remove_proc_entry(ACPI_BUTTON_CLASS, acpi_root_dir);
513
311 return_VOID; 514 return_VOID;
312} 515}
313 516
517
314module_init(acpi_button_init); 518module_init(acpi_button_init);
315module_exit(acpi_button_exit); 519module_exit(acpi_button_exit);