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1da177e4 LT |
1 | /* |
2 | * acpi_system.c - ACPI System Driver ($Revision: 63 $) | |
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/proc_fs.h> | |
27 | #include <linux/seq_file.h> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
1da177e4 | 29 | #include <linux/init.h> |
e108526e | 30 | #include <linux/string.h> |
1da177e4 LT |
31 | #include <asm/uaccess.h> |
32 | ||
33 | #include <acpi/acpi_drivers.h> | |
34 | ||
a192a958 LB |
35 | #define PREFIX "ACPI: " |
36 | ||
1da177e4 | 37 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
f52fd66d | 38 | ACPI_MODULE_NAME("system"); |
5bb730fd | 39 | |
1da177e4 | 40 | #define ACPI_SYSTEM_CLASS "system" |
1da177e4 | 41 | #define ACPI_SYSTEM_DEVICE_NAME "System" |
1da177e4 | 42 | |
5229e87d | 43 | u32 acpi_irq_handled; |
88bea188 | 44 | u32 acpi_irq_not_handled; |
5229e87d | 45 | |
5bb730fd ZR |
46 | /* |
47 | * Make ACPICA version work as module param | |
48 | */ | |
d4c5f047 ZR |
49 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) |
50 | { | |
5bb730fd ZR |
51 | int result; |
52 | ||
53 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); | |
54 | ||
55 | return result; | |
56 | } | |
57 | ||
58 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); | |
59 | ||
d4c5f047 ZR |
60 | /* -------------------------------------------------------------------------- |
61 | FS Interface (/sys) | |
62 | -------------------------------------------------------------------------- */ | |
63 | static LIST_HEAD(acpi_table_attr_list); | |
a77aa28a | 64 | static struct kobject *tables_kobj; |
4658e4ef | 65 | static struct kobject *dynamic_tables_kobj; |
d4c5f047 ZR |
66 | |
67 | struct acpi_table_attr { | |
68 | struct bin_attribute attr; | |
69 | char name[8]; | |
70 | int instance; | |
71 | struct list_head node; | |
72 | }; | |
73 | ||
74 | static ssize_t acpi_table_show(struct kobject *kobj, | |
75 | struct bin_attribute *bin_attr, char *buf, | |
76 | loff_t offset, size_t count) | |
77 | { | |
78 | struct acpi_table_attr *table_attr = | |
79 | container_of(bin_attr, struct acpi_table_attr, attr); | |
80 | struct acpi_table_header *table_header = NULL; | |
81 | acpi_status status; | |
4feba70a PG |
82 | char name[ACPI_NAME_SIZE]; |
83 | ||
84 | if (strncmp(table_attr->name, "NULL", 4)) | |
85 | memcpy(name, table_attr->name, ACPI_NAME_SIZE); | |
86 | else | |
87 | memcpy(name, "\0\0\0\0", 4); | |
d4c5f047 ZR |
88 | |
89 | status = | |
4feba70a | 90 | acpi_get_table(name, table_attr->instance, |
d4c5f047 ZR |
91 | &table_header); |
92 | if (ACPI_FAILURE(status)) | |
93 | return -ENODEV; | |
94 | ||
46a21e46 AM |
95 | return memory_read_from_buffer(buf, count, &offset, |
96 | table_header, table_header->length); | |
d4c5f047 ZR |
97 | } |
98 | ||
99 | static void acpi_table_attr_init(struct acpi_table_attr *table_attr, | |
100 | struct acpi_table_header *table_header) | |
101 | { | |
102 | struct acpi_table_header *header = NULL; | |
103 | struct acpi_table_attr *attr = NULL; | |
104 | ||
a07e4156 | 105 | sysfs_attr_init(&table_attr->attr.attr); |
4feba70a PG |
106 | if (table_header->signature[0] != '\0') |
107 | memcpy(table_attr->name, table_header->signature, | |
108 | ACPI_NAME_SIZE); | |
109 | else | |
110 | memcpy(table_attr->name, "NULL", 4); | |
d4c5f047 ZR |
111 | |
112 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
4feba70a | 113 | if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE)) |
d4c5f047 ZR |
114 | if (table_attr->instance < attr->instance) |
115 | table_attr->instance = attr->instance; | |
116 | } | |
117 | table_attr->instance++; | |
118 | ||
119 | if (table_attr->instance > 1 || (table_attr->instance == 1 && | |
4feba70a PG |
120 | !acpi_get_table |
121 | (table_header->signature, 2, &header))) | |
122 | sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", | |
123 | table_attr->instance); | |
d4c5f047 ZR |
124 | |
125 | table_attr->attr.size = 0; | |
126 | table_attr->attr.read = acpi_table_show; | |
127 | table_attr->attr.attr.name = table_attr->name; | |
d0006f32 | 128 | table_attr->attr.attr.mode = 0400; |
d4c5f047 ZR |
129 | |
130 | return; | |
131 | } | |
132 | ||
4658e4ef ZR |
133 | static acpi_status |
134 | acpi_sysfs_table_handler(u32 event, void *table, void *context) | |
135 | { | |
136 | struct acpi_table_attr *table_attr; | |
137 | ||
138 | switch (event) { | |
139 | case ACPI_TABLE_EVENT_LOAD: | |
140 | table_attr = | |
141 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
142 | if (!table_attr) | |
143 | return AE_NO_MEMORY; | |
144 | ||
145 | acpi_table_attr_init(table_attr, table); | |
146 | if (sysfs_create_bin_file(dynamic_tables_kobj, | |
147 | &table_attr->attr)) { | |
148 | kfree(table_attr); | |
149 | return AE_ERROR; | |
150 | } else | |
151 | list_add_tail(&table_attr->node, | |
152 | &acpi_table_attr_list); | |
153 | break; | |
154 | case ACPI_TABLE_EVENT_UNLOAD: | |
155 | /* | |
156 | * we do not need to do anything right now | |
157 | * because the table is not deleted from the | |
158 | * global table list when unloading it. | |
159 | */ | |
160 | break; | |
161 | default: | |
162 | return AE_BAD_PARAMETER; | |
163 | } | |
164 | return AE_OK; | |
165 | } | |
166 | ||
d4c5f047 ZR |
167 | static int acpi_system_sysfs_init(void) |
168 | { | |
169 | struct acpi_table_attr *table_attr; | |
170 | struct acpi_table_header *table_header = NULL; | |
171 | int table_index = 0; | |
172 | int result; | |
173 | ||
a77aa28a GKH |
174 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
175 | if (!tables_kobj) | |
4658e4ef ZR |
176 | goto err; |
177 | ||
178 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); | |
179 | if (!dynamic_tables_kobj) | |
180 | goto err_dynamic_tables; | |
d4c5f047 ZR |
181 | |
182 | do { | |
183 | result = acpi_get_table_by_index(table_index, &table_header); | |
184 | if (!result) { | |
185 | table_index++; | |
186 | table_attr = NULL; | |
187 | table_attr = | |
188 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
189 | if (!table_attr) | |
190 | return -ENOMEM; | |
191 | ||
192 | acpi_table_attr_init(table_attr, table_header); | |
193 | result = | |
a77aa28a | 194 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
195 | &table_attr->attr); |
196 | if (result) { | |
197 | kfree(table_attr); | |
198 | return result; | |
199 | } else | |
200 | list_add_tail(&table_attr->node, | |
201 | &acpi_table_attr_list); | |
202 | } | |
203 | } while (!result); | |
a77aa28a | 204 | kobject_uevent(tables_kobj, KOBJ_ADD); |
4658e4ef ZR |
205 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); |
206 | result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); | |
207 | ||
208 | return result == AE_OK ? 0 : -EINVAL; | |
209 | err_dynamic_tables: | |
210 | kobject_put(tables_kobj); | |
211 | err: | |
212 | return -ENOMEM; | |
d4c5f047 ZR |
213 | } |
214 | ||
5229e87d LB |
215 | /* |
216 | * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/ | |
217 | * See Documentation/ABI/testing/sysfs-firmware-acpi | |
218 | */ | |
219 | ||
220 | #define COUNT_GPE 0 | |
221 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
88bea188 LB |
222 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ |
223 | #define COUNT_ERROR 3 /* other */ | |
224 | #define NUM_COUNTERS_EXTRA 4 | |
5229e87d | 225 | |
71b58cbb ZR |
226 | struct event_counter { |
227 | u32 count; | |
228 | u32 flags; | |
229 | }; | |
230 | ||
231 | static struct event_counter *all_counters; | |
5229e87d LB |
232 | static u32 num_gpes; |
233 | static u32 num_counters; | |
234 | static struct attribute **all_attrs; | |
235 | static u32 acpi_gpe_count; | |
236 | ||
237 | static struct attribute_group interrupt_stats_attr_group = { | |
238 | .name = "interrupts", | |
239 | }; | |
240 | static struct kobj_attribute *counter_attrs; | |
241 | ||
5229e87d LB |
242 | static void delete_gpe_attr_array(void) |
243 | { | |
71b58cbb | 244 | struct event_counter *tmp = all_counters; |
5229e87d LB |
245 | |
246 | all_counters = NULL; | |
247 | kfree(tmp); | |
248 | ||
249 | if (counter_attrs) { | |
250 | int i; | |
251 | ||
252 | for (i = 0; i < num_gpes; i++) | |
253 | kfree(counter_attrs[i].attr.name); | |
254 | ||
255 | kfree(counter_attrs); | |
256 | } | |
257 | kfree(all_attrs); | |
258 | ||
259 | return; | |
260 | } | |
261 | ||
262 | void acpi_os_gpe_count(u32 gpe_number) | |
263 | { | |
264 | acpi_gpe_count++; | |
265 | ||
266 | if (!all_counters) | |
267 | return; | |
268 | ||
269 | if (gpe_number < num_gpes) | |
71b58cbb | 270 | all_counters[gpe_number].count++; |
5229e87d | 271 | else |
71b58cbb ZR |
272 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
273 | count++; | |
5229e87d LB |
274 | |
275 | return; | |
276 | } | |
277 | ||
278 | void acpi_os_fixed_event_count(u32 event_number) | |
279 | { | |
280 | if (!all_counters) | |
281 | return; | |
282 | ||
283 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
71b58cbb | 284 | all_counters[num_gpes + event_number].count++; |
5229e87d | 285 | else |
71b58cbb ZR |
286 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
287 | count++; | |
5229e87d LB |
288 | |
289 | return; | |
290 | } | |
291 | ||
71b58cbb ZR |
292 | static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle) |
293 | { | |
294 | int result = 0; | |
295 | ||
296 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
297 | goto end; | |
298 | ||
299 | if (index < num_gpes) { | |
e97d6bf1 | 300 | result = acpi_get_gpe_device(index, handle); |
71b58cbb ZR |
301 | if (result) { |
302 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
303 | "Invalid GPE 0x%x\n", index)); | |
304 | goto end; | |
305 | } | |
0f849d2c | 306 | result = acpi_get_gpe_status(*handle, index, status); |
71b58cbb ZR |
307 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) |
308 | result = acpi_get_event_status(index - num_gpes, status); | |
309 | ||
71b58cbb ZR |
310 | end: |
311 | return result; | |
312 | } | |
313 | ||
5229e87d LB |
314 | static ssize_t counter_show(struct kobject *kobj, |
315 | struct kobj_attribute *attr, char *buf) | |
316 | { | |
71b58cbb ZR |
317 | int index = attr - counter_attrs; |
318 | int size; | |
319 | acpi_handle handle; | |
320 | acpi_event_status status; | |
321 | int result = 0; | |
322 | ||
323 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
5229e87d | 324 | acpi_irq_handled; |
88bea188 LB |
325 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = |
326 | acpi_irq_not_handled; | |
71b58cbb | 327 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = |
5229e87d LB |
328 | acpi_gpe_count; |
329 | ||
71b58cbb ZR |
330 | size = sprintf(buf, "%8d", all_counters[index].count); |
331 | ||
332 | /* "gpe_all" or "sci" */ | |
333 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
334 | goto end; | |
335 | ||
336 | result = get_status(index, &status, &handle); | |
337 | if (result) | |
338 | goto end; | |
339 | ||
ed206fac ZR |
340 | if (!(status & ACPI_EVENT_FLAG_HANDLE)) |
341 | size += sprintf(buf + size, " invalid"); | |
71b58cbb | 342 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
ed206fac ZR |
343 | size += sprintf(buf + size, " enabled"); |
344 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) | |
345 | size += sprintf(buf + size, " wake_enabled"); | |
71b58cbb | 346 | else |
ed206fac | 347 | size += sprintf(buf + size, " disabled"); |
71b58cbb ZR |
348 | |
349 | end: | |
350 | size += sprintf(buf + size, "\n"); | |
351 | return result ? result : size; | |
5229e87d LB |
352 | } |
353 | ||
354 | /* | |
355 | * counter_set() sets the specified counter. | |
356 | * setting the total "sci" file to any value clears all counters. | |
71b58cbb | 357 | * enable/disable/clear a gpe/fixed event in user space. |
5229e87d LB |
358 | */ |
359 | static ssize_t counter_set(struct kobject *kobj, | |
360 | struct kobj_attribute *attr, const char *buf, size_t size) | |
361 | { | |
362 | int index = attr - counter_attrs; | |
71b58cbb ZR |
363 | acpi_event_status status; |
364 | acpi_handle handle; | |
365 | int result = 0; | |
5229e87d LB |
366 | |
367 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
368 | int i; | |
369 | for (i = 0; i < num_counters; ++i) | |
71b58cbb | 370 | all_counters[i].count = 0; |
5229e87d LB |
371 | acpi_gpe_count = 0; |
372 | acpi_irq_handled = 0; | |
88bea188 | 373 | acpi_irq_not_handled = 0; |
71b58cbb ZR |
374 | goto end; |
375 | } | |
376 | ||
377 | /* show the event status for both GPEs and Fixed Events */ | |
378 | result = get_status(index, &status, &handle); | |
379 | if (result) | |
380 | goto end; | |
381 | ||
ed206fac | 382 | if (!(status & ACPI_EVENT_FLAG_HANDLE)) { |
55ac9a01 LM |
383 | printk(KERN_WARNING PREFIX |
384 | "Can not change Invalid GPE/Fixed Event status\n"); | |
71b58cbb ZR |
385 | return -EINVAL; |
386 | } | |
5229e87d | 387 | |
71b58cbb ZR |
388 | if (index < num_gpes) { |
389 | if (!strcmp(buf, "disable\n") && | |
390 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
9630bdd9 | 391 | result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE); |
71b58cbb ZR |
392 | else if (!strcmp(buf, "enable\n") && |
393 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
9630bdd9 | 394 | result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE); |
71b58cbb ZR |
395 | else if (!strcmp(buf, "clear\n") && |
396 | (status & ACPI_EVENT_FLAG_SET)) | |
0f849d2c | 397 | result = acpi_clear_gpe(handle, index); |
71b58cbb ZR |
398 | else |
399 | all_counters[index].count = strtoul(buf, NULL, 0); | |
400 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { | |
401 | int event = index - num_gpes; | |
402 | if (!strcmp(buf, "disable\n") && | |
403 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
404 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
405 | else if (!strcmp(buf, "enable\n") && | |
406 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
407 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
408 | else if (!strcmp(buf, "clear\n") && | |
409 | (status & ACPI_EVENT_FLAG_SET)) | |
410 | result = acpi_clear_event(event); | |
411 | else | |
412 | all_counters[index].count = strtoul(buf, NULL, 0); | |
5229e87d | 413 | } else |
71b58cbb | 414 | all_counters[index].count = strtoul(buf, NULL, 0); |
5229e87d | 415 | |
71b58cbb ZR |
416 | if (ACPI_FAILURE(result)) |
417 | result = -EINVAL; | |
418 | end: | |
419 | return result ? result : size; | |
5229e87d LB |
420 | } |
421 | ||
422 | void acpi_irq_stats_init(void) | |
423 | { | |
424 | int i; | |
425 | ||
426 | if (all_counters) | |
427 | return; | |
428 | ||
e97d6bf1 | 429 | num_gpes = acpi_current_gpe_count; |
5229e87d LB |
430 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; |
431 | ||
432 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
433 | GFP_KERNEL); | |
434 | if (all_attrs == NULL) | |
435 | return; | |
436 | ||
71b58cbb ZR |
437 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), |
438 | GFP_KERNEL); | |
5229e87d LB |
439 | if (all_counters == NULL) |
440 | goto fail; | |
441 | ||
442 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
443 | GFP_KERNEL); | |
444 | if (counter_attrs == NULL) | |
445 | goto fail; | |
446 | ||
447 | for (i = 0; i < num_counters; ++i) { | |
c8dc9de1 | 448 | char buffer[12]; |
5229e87d LB |
449 | char *name; |
450 | ||
451 | if (i < num_gpes) | |
452 | sprintf(buffer, "gpe%02X", i); | |
453 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
454 | sprintf(buffer, "ff_pmtimer"); | |
455 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
456 | sprintf(buffer, "ff_gbl_lock"); | |
457 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
458 | sprintf(buffer, "ff_pwr_btn"); | |
459 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
460 | sprintf(buffer, "ff_slp_btn"); | |
461 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
462 | sprintf(buffer, "ff_rt_clk"); | |
463 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
464 | sprintf(buffer, "gpe_all"); | |
465 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
466 | sprintf(buffer, "sci"); | |
88bea188 LB |
467 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) |
468 | sprintf(buffer, "sci_not"); | |
5229e87d LB |
469 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) |
470 | sprintf(buffer, "error"); | |
471 | else | |
472 | sprintf(buffer, "bug%02X", i); | |
473 | ||
474 | name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); | |
475 | if (name == NULL) | |
476 | goto fail; | |
477 | strncpy(name, buffer, strlen(buffer) + 1); | |
478 | ||
a07e4156 | 479 | sysfs_attr_init(&counter_attrs[i].attr); |
5229e87d LB |
480 | counter_attrs[i].attr.name = name; |
481 | counter_attrs[i].attr.mode = 0644; | |
482 | counter_attrs[i].show = counter_show; | |
483 | counter_attrs[i].store = counter_set; | |
484 | ||
485 | all_attrs[i] = &counter_attrs[i].attr; | |
486 | } | |
487 | ||
488 | interrupt_stats_attr_group.attrs = all_attrs; | |
b7143156 LB |
489 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
490 | return; | |
5229e87d LB |
491 | |
492 | fail: | |
493 | delete_gpe_attr_array(); | |
494 | return; | |
495 | } | |
496 | ||
497 | static void __exit interrupt_stats_exit(void) | |
498 | { | |
499 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
500 | ||
501 | delete_gpe_attr_array(); | |
502 | ||
503 | return; | |
504 | } | |
505 | ||
1da177e4 LT |
506 | /* -------------------------------------------------------------------------- |
507 | FS Interface (/proc) | |
508 | -------------------------------------------------------------------------- */ | |
5bb730fd | 509 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
510 | #define ACPI_SYSTEM_FILE_INFO "info" |
511 | #define ACPI_SYSTEM_FILE_EVENT "event" | |
512 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" | |
513 | #define ACPI_SYSTEM_FILE_FADT "fadt" | |
1da177e4 | 514 | |
4be44fcd | 515 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 516 | { |
1da177e4 LT |
517 | |
518 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 519 | return 0; |
1da177e4 LT |
520 | } |
521 | ||
522 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
523 | { | |
524 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
525 | } | |
526 | ||
d7508032 | 527 | static const struct file_operations acpi_system_info_ops = { |
cf7acfab | 528 | .owner = THIS_MODULE, |
4be44fcd LB |
529 | .open = acpi_system_info_open_fs, |
530 | .read = seq_read, | |
531 | .llseek = seq_lseek, | |
532 | .release = single_release, | |
1da177e4 LT |
533 | }; |
534 | ||
4be44fcd LB |
535 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
536 | loff_t *); | |
1da177e4 | 537 | |
d7508032 | 538 | static const struct file_operations acpi_system_dsdt_ops = { |
cf7acfab | 539 | .owner = THIS_MODULE, |
4be44fcd | 540 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
541 | }; |
542 | ||
543 | static ssize_t | |
4be44fcd LB |
544 | acpi_system_read_dsdt(struct file *file, |
545 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 546 | { |
4be44fcd | 547 | acpi_status status = AE_OK; |
ad71860a | 548 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 549 | ssize_t res; |
1da177e4 | 550 | |
ad71860a | 551 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 552 | if (ACPI_FAILURE(status)) |
d550d98d | 553 | return -ENODEV; |
1da177e4 | 554 | |
d4c5f047 | 555 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 556 | |
d550d98d | 557 | return res; |
1da177e4 LT |
558 | } |
559 | ||
4be44fcd LB |
560 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
561 | loff_t *); | |
1da177e4 | 562 | |
d7508032 | 563 | static const struct file_operations acpi_system_fadt_ops = { |
cf7acfab | 564 | .owner = THIS_MODULE, |
4be44fcd | 565 | .read = acpi_system_read_fadt, |
1da177e4 LT |
566 | }; |
567 | ||
568 | static ssize_t | |
4be44fcd LB |
569 | acpi_system_read_fadt(struct file *file, |
570 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 571 | { |
4be44fcd | 572 | acpi_status status = AE_OK; |
ad71860a | 573 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 574 | ssize_t res; |
1da177e4 | 575 | |
ad71860a | 576 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 577 | if (ACPI_FAILURE(status)) |
d550d98d | 578 | return -ENODEV; |
1da177e4 | 579 | |
d4c5f047 | 580 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 581 | |
d550d98d | 582 | return res; |
1da177e4 LT |
583 | } |
584 | ||
d4c5f047 | 585 | static int acpi_system_procfs_init(void) |
1da177e4 | 586 | { |
4be44fcd | 587 | struct proc_dir_entry *entry; |
1da177e4 | 588 | int error = 0; |
1da177e4 | 589 | |
1da177e4 | 590 | /* 'info' [R] */ |
cf7acfab DL |
591 | entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, |
592 | &acpi_system_info_ops); | |
1da177e4 LT |
593 | if (!entry) |
594 | goto Error; | |
1da177e4 LT |
595 | |
596 | /* 'dsdt' [R] */ | |
cf7acfab DL |
597 | entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, |
598 | &acpi_system_dsdt_ops); | |
599 | if (!entry) | |
1da177e4 LT |
600 | goto Error; |
601 | ||
602 | /* 'fadt' [R] */ | |
cf7acfab DL |
603 | entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, |
604 | &acpi_system_fadt_ops); | |
605 | if (!entry) | |
1da177e4 LT |
606 | goto Error; |
607 | ||
4be44fcd | 608 | Done: |
d550d98d | 609 | return error; |
1da177e4 | 610 | |
4be44fcd | 611 | Error: |
1da177e4 LT |
612 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
613 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
614 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
615 | ||
616 | error = -EFAULT; | |
617 | goto Done; | |
618 | } | |
d4c5f047 ZR |
619 | #else |
620 | static int acpi_system_procfs_init(void) | |
621 | { | |
622 | return 0; | |
623 | } | |
624 | #endif | |
625 | ||
141a0af3 | 626 | int __init acpi_system_init(void) |
d4c5f047 | 627 | { |
141a0af3 | 628 | int result; |
d4c5f047 ZR |
629 | |
630 | result = acpi_system_procfs_init(); | |
631 | if (result) | |
632 | return result; | |
633 | ||
634 | result = acpi_system_sysfs_init(); | |
635 | ||
636 | return result; | |
637 | } |