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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> | |
28 | #include <linux/init.h> | |
e108526e | 29 | #include <linux/string.h> |
1da177e4 LT |
30 | #include <asm/uaccess.h> |
31 | ||
32 | #include <acpi/acpi_drivers.h> | |
33 | ||
a192a958 LB |
34 | #define PREFIX "ACPI: " |
35 | ||
1da177e4 | 36 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
f52fd66d | 37 | ACPI_MODULE_NAME("system"); |
5bb730fd | 38 | |
1da177e4 | 39 | #define ACPI_SYSTEM_CLASS "system" |
1da177e4 | 40 | #define ACPI_SYSTEM_DEVICE_NAME "System" |
1da177e4 | 41 | |
5229e87d | 42 | u32 acpi_irq_handled; |
88bea188 | 43 | u32 acpi_irq_not_handled; |
5229e87d | 44 | |
5bb730fd ZR |
45 | /* |
46 | * Make ACPICA version work as module param | |
47 | */ | |
d4c5f047 ZR |
48 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) |
49 | { | |
5bb730fd ZR |
50 | int result; |
51 | ||
52 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); | |
53 | ||
54 | return result; | |
55 | } | |
56 | ||
57 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); | |
58 | ||
d4c5f047 ZR |
59 | /* -------------------------------------------------------------------------- |
60 | FS Interface (/sys) | |
61 | -------------------------------------------------------------------------- */ | |
62 | static LIST_HEAD(acpi_table_attr_list); | |
a77aa28a | 63 | static struct kobject *tables_kobj; |
4658e4ef | 64 | static struct kobject *dynamic_tables_kobj; |
d4c5f047 ZR |
65 | |
66 | struct acpi_table_attr { | |
67 | struct bin_attribute attr; | |
68 | char name[8]; | |
69 | int instance; | |
70 | struct list_head node; | |
71 | }; | |
72 | ||
73 | static ssize_t acpi_table_show(struct kobject *kobj, | |
74 | struct bin_attribute *bin_attr, char *buf, | |
75 | loff_t offset, size_t count) | |
76 | { | |
77 | struct acpi_table_attr *table_attr = | |
78 | container_of(bin_attr, struct acpi_table_attr, attr); | |
79 | struct acpi_table_header *table_header = NULL; | |
80 | acpi_status status; | |
4feba70a PG |
81 | char name[ACPI_NAME_SIZE]; |
82 | ||
83 | if (strncmp(table_attr->name, "NULL", 4)) | |
84 | memcpy(name, table_attr->name, ACPI_NAME_SIZE); | |
85 | else | |
86 | memcpy(name, "\0\0\0\0", 4); | |
d4c5f047 ZR |
87 | |
88 | status = | |
4feba70a | 89 | acpi_get_table(name, table_attr->instance, |
d4c5f047 ZR |
90 | &table_header); |
91 | if (ACPI_FAILURE(status)) | |
92 | return -ENODEV; | |
93 | ||
46a21e46 AM |
94 | return memory_read_from_buffer(buf, count, &offset, |
95 | table_header, table_header->length); | |
d4c5f047 ZR |
96 | } |
97 | ||
98 | static void acpi_table_attr_init(struct acpi_table_attr *table_attr, | |
99 | struct acpi_table_header *table_header) | |
100 | { | |
101 | struct acpi_table_header *header = NULL; | |
102 | struct acpi_table_attr *attr = NULL; | |
103 | ||
4feba70a PG |
104 | if (table_header->signature[0] != '\0') |
105 | memcpy(table_attr->name, table_header->signature, | |
106 | ACPI_NAME_SIZE); | |
107 | else | |
108 | memcpy(table_attr->name, "NULL", 4); | |
d4c5f047 ZR |
109 | |
110 | list_for_each_entry(attr, &acpi_table_attr_list, node) { | |
4feba70a | 111 | if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE)) |
d4c5f047 ZR |
112 | if (table_attr->instance < attr->instance) |
113 | table_attr->instance = attr->instance; | |
114 | } | |
115 | table_attr->instance++; | |
116 | ||
117 | if (table_attr->instance > 1 || (table_attr->instance == 1 && | |
4feba70a PG |
118 | !acpi_get_table |
119 | (table_header->signature, 2, &header))) | |
120 | sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", | |
121 | table_attr->instance); | |
d4c5f047 ZR |
122 | |
123 | table_attr->attr.size = 0; | |
124 | table_attr->attr.read = acpi_table_show; | |
125 | table_attr->attr.attr.name = table_attr->name; | |
d0006f32 | 126 | table_attr->attr.attr.mode = 0400; |
d4c5f047 ZR |
127 | |
128 | return; | |
129 | } | |
130 | ||
4658e4ef ZR |
131 | static acpi_status |
132 | acpi_sysfs_table_handler(u32 event, void *table, void *context) | |
133 | { | |
134 | struct acpi_table_attr *table_attr; | |
135 | ||
136 | switch (event) { | |
137 | case ACPI_TABLE_EVENT_LOAD: | |
138 | table_attr = | |
139 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
140 | if (!table_attr) | |
141 | return AE_NO_MEMORY; | |
142 | ||
143 | acpi_table_attr_init(table_attr, table); | |
144 | if (sysfs_create_bin_file(dynamic_tables_kobj, | |
145 | &table_attr->attr)) { | |
146 | kfree(table_attr); | |
147 | return AE_ERROR; | |
148 | } else | |
149 | list_add_tail(&table_attr->node, | |
150 | &acpi_table_attr_list); | |
151 | break; | |
152 | case ACPI_TABLE_EVENT_UNLOAD: | |
153 | /* | |
154 | * we do not need to do anything right now | |
155 | * because the table is not deleted from the | |
156 | * global table list when unloading it. | |
157 | */ | |
158 | break; | |
159 | default: | |
160 | return AE_BAD_PARAMETER; | |
161 | } | |
162 | return AE_OK; | |
163 | } | |
164 | ||
d4c5f047 ZR |
165 | static int acpi_system_sysfs_init(void) |
166 | { | |
167 | struct acpi_table_attr *table_attr; | |
168 | struct acpi_table_header *table_header = NULL; | |
169 | int table_index = 0; | |
170 | int result; | |
171 | ||
a77aa28a GKH |
172 | tables_kobj = kobject_create_and_add("tables", acpi_kobj); |
173 | if (!tables_kobj) | |
4658e4ef ZR |
174 | goto err; |
175 | ||
176 | dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj); | |
177 | if (!dynamic_tables_kobj) | |
178 | goto err_dynamic_tables; | |
d4c5f047 ZR |
179 | |
180 | do { | |
181 | result = acpi_get_table_by_index(table_index, &table_header); | |
182 | if (!result) { | |
183 | table_index++; | |
184 | table_attr = NULL; | |
185 | table_attr = | |
186 | kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); | |
187 | if (!table_attr) | |
188 | return -ENOMEM; | |
189 | ||
190 | acpi_table_attr_init(table_attr, table_header); | |
191 | result = | |
a77aa28a | 192 | sysfs_create_bin_file(tables_kobj, |
d4c5f047 ZR |
193 | &table_attr->attr); |
194 | if (result) { | |
195 | kfree(table_attr); | |
196 | return result; | |
197 | } else | |
198 | list_add_tail(&table_attr->node, | |
199 | &acpi_table_attr_list); | |
200 | } | |
201 | } while (!result); | |
a77aa28a | 202 | kobject_uevent(tables_kobj, KOBJ_ADD); |
4658e4ef ZR |
203 | kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); |
204 | result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); | |
205 | ||
206 | return result == AE_OK ? 0 : -EINVAL; | |
207 | err_dynamic_tables: | |
208 | kobject_put(tables_kobj); | |
209 | err: | |
210 | return -ENOMEM; | |
d4c5f047 ZR |
211 | } |
212 | ||
5229e87d LB |
213 | /* |
214 | * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/ | |
215 | * See Documentation/ABI/testing/sysfs-firmware-acpi | |
216 | */ | |
217 | ||
218 | #define COUNT_GPE 0 | |
219 | #define COUNT_SCI 1 /* acpi_irq_handled */ | |
88bea188 LB |
220 | #define COUNT_SCI_NOT 2 /* acpi_irq_not_handled */ |
221 | #define COUNT_ERROR 3 /* other */ | |
222 | #define NUM_COUNTERS_EXTRA 4 | |
5229e87d | 223 | |
71b58cbb ZR |
224 | struct event_counter { |
225 | u32 count; | |
226 | u32 flags; | |
227 | }; | |
228 | ||
229 | static struct event_counter *all_counters; | |
5229e87d LB |
230 | static u32 num_gpes; |
231 | static u32 num_counters; | |
232 | static struct attribute **all_attrs; | |
233 | static u32 acpi_gpe_count; | |
234 | ||
235 | static struct attribute_group interrupt_stats_attr_group = { | |
236 | .name = "interrupts", | |
237 | }; | |
238 | static struct kobj_attribute *counter_attrs; | |
239 | ||
5229e87d LB |
240 | static void delete_gpe_attr_array(void) |
241 | { | |
71b58cbb | 242 | struct event_counter *tmp = all_counters; |
5229e87d LB |
243 | |
244 | all_counters = NULL; | |
245 | kfree(tmp); | |
246 | ||
247 | if (counter_attrs) { | |
248 | int i; | |
249 | ||
250 | for (i = 0; i < num_gpes; i++) | |
251 | kfree(counter_attrs[i].attr.name); | |
252 | ||
253 | kfree(counter_attrs); | |
254 | } | |
255 | kfree(all_attrs); | |
256 | ||
257 | return; | |
258 | } | |
259 | ||
260 | void acpi_os_gpe_count(u32 gpe_number) | |
261 | { | |
262 | acpi_gpe_count++; | |
263 | ||
264 | if (!all_counters) | |
265 | return; | |
266 | ||
267 | if (gpe_number < num_gpes) | |
71b58cbb | 268 | all_counters[gpe_number].count++; |
5229e87d | 269 | else |
71b58cbb ZR |
270 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
271 | count++; | |
5229e87d LB |
272 | |
273 | return; | |
274 | } | |
275 | ||
276 | void acpi_os_fixed_event_count(u32 event_number) | |
277 | { | |
278 | if (!all_counters) | |
279 | return; | |
280 | ||
281 | if (event_number < ACPI_NUM_FIXED_EVENTS) | |
71b58cbb | 282 | all_counters[num_gpes + event_number].count++; |
5229e87d | 283 | else |
71b58cbb ZR |
284 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR]. |
285 | count++; | |
5229e87d LB |
286 | |
287 | return; | |
288 | } | |
289 | ||
71b58cbb ZR |
290 | static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle) |
291 | { | |
292 | int result = 0; | |
293 | ||
294 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
295 | goto end; | |
296 | ||
297 | if (index < num_gpes) { | |
e97d6bf1 | 298 | result = acpi_get_gpe_device(index, handle); |
71b58cbb ZR |
299 | if (result) { |
300 | ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND, | |
301 | "Invalid GPE 0x%x\n", index)); | |
302 | goto end; | |
303 | } | |
304 | result = acpi_get_gpe_status(*handle, index, | |
305 | ACPI_NOT_ISR, status); | |
306 | } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS)) | |
307 | result = acpi_get_event_status(index - num_gpes, status); | |
308 | ||
71b58cbb ZR |
309 | end: |
310 | return result; | |
311 | } | |
312 | ||
5229e87d LB |
313 | static ssize_t counter_show(struct kobject *kobj, |
314 | struct kobj_attribute *attr, char *buf) | |
315 | { | |
71b58cbb ZR |
316 | int index = attr - counter_attrs; |
317 | int size; | |
318 | acpi_handle handle; | |
319 | acpi_event_status status; | |
320 | int result = 0; | |
321 | ||
322 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count = | |
5229e87d | 323 | acpi_irq_handled; |
88bea188 LB |
324 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT].count = |
325 | acpi_irq_not_handled; | |
71b58cbb | 326 | all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = |
5229e87d LB |
327 | acpi_gpe_count; |
328 | ||
71b58cbb ZR |
329 | size = sprintf(buf, "%8d", all_counters[index].count); |
330 | ||
331 | /* "gpe_all" or "sci" */ | |
332 | if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) | |
333 | goto end; | |
334 | ||
335 | result = get_status(index, &status, &handle); | |
336 | if (result) | |
337 | goto end; | |
338 | ||
ed206fac ZR |
339 | if (!(status & ACPI_EVENT_FLAG_HANDLE)) |
340 | size += sprintf(buf + size, " invalid"); | |
71b58cbb | 341 | else if (status & ACPI_EVENT_FLAG_ENABLED) |
ed206fac ZR |
342 | size += sprintf(buf + size, " enabled"); |
343 | else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED) | |
344 | size += sprintf(buf + size, " wake_enabled"); | |
71b58cbb | 345 | else |
ed206fac | 346 | size += sprintf(buf + size, " disabled"); |
71b58cbb ZR |
347 | |
348 | end: | |
349 | size += sprintf(buf + size, "\n"); | |
350 | return result ? result : size; | |
5229e87d LB |
351 | } |
352 | ||
353 | /* | |
354 | * counter_set() sets the specified counter. | |
355 | * setting the total "sci" file to any value clears all counters. | |
71b58cbb | 356 | * enable/disable/clear a gpe/fixed event in user space. |
5229e87d LB |
357 | */ |
358 | static ssize_t counter_set(struct kobject *kobj, | |
359 | struct kobj_attribute *attr, const char *buf, size_t size) | |
360 | { | |
361 | int index = attr - counter_attrs; | |
71b58cbb ZR |
362 | acpi_event_status status; |
363 | acpi_handle handle; | |
364 | int result = 0; | |
5229e87d LB |
365 | |
366 | if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { | |
367 | int i; | |
368 | for (i = 0; i < num_counters; ++i) | |
71b58cbb | 369 | all_counters[i].count = 0; |
5229e87d LB |
370 | acpi_gpe_count = 0; |
371 | acpi_irq_handled = 0; | |
88bea188 | 372 | acpi_irq_not_handled = 0; |
71b58cbb ZR |
373 | goto end; |
374 | } | |
375 | ||
376 | /* show the event status for both GPEs and Fixed Events */ | |
377 | result = get_status(index, &status, &handle); | |
378 | if (result) | |
379 | goto end; | |
380 | ||
ed206fac | 381 | if (!(status & ACPI_EVENT_FLAG_HANDLE)) { |
55ac9a01 LM |
382 | printk(KERN_WARNING PREFIX |
383 | "Can not change Invalid GPE/Fixed Event status\n"); | |
71b58cbb ZR |
384 | return -EINVAL; |
385 | } | |
5229e87d | 386 | |
71b58cbb ZR |
387 | if (index < num_gpes) { |
388 | if (!strcmp(buf, "disable\n") && | |
389 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
0b7084ac | 390 | result = acpi_disable_gpe(handle, index); |
71b58cbb ZR |
391 | else if (!strcmp(buf, "enable\n") && |
392 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
0b7084ac | 393 | result = acpi_enable_gpe(handle, index); |
71b58cbb ZR |
394 | else if (!strcmp(buf, "clear\n") && |
395 | (status & ACPI_EVENT_FLAG_SET)) | |
396 | result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR); | |
397 | else | |
398 | all_counters[index].count = strtoul(buf, NULL, 0); | |
399 | } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { | |
400 | int event = index - num_gpes; | |
401 | if (!strcmp(buf, "disable\n") && | |
402 | (status & ACPI_EVENT_FLAG_ENABLED)) | |
403 | result = acpi_disable_event(event, ACPI_NOT_ISR); | |
404 | else if (!strcmp(buf, "enable\n") && | |
405 | !(status & ACPI_EVENT_FLAG_ENABLED)) | |
406 | result = acpi_enable_event(event, ACPI_NOT_ISR); | |
407 | else if (!strcmp(buf, "clear\n") && | |
408 | (status & ACPI_EVENT_FLAG_SET)) | |
409 | result = acpi_clear_event(event); | |
410 | else | |
411 | all_counters[index].count = strtoul(buf, NULL, 0); | |
5229e87d | 412 | } else |
71b58cbb | 413 | all_counters[index].count = strtoul(buf, NULL, 0); |
5229e87d | 414 | |
71b58cbb ZR |
415 | if (ACPI_FAILURE(result)) |
416 | result = -EINVAL; | |
417 | end: | |
418 | return result ? result : size; | |
5229e87d LB |
419 | } |
420 | ||
421 | void acpi_irq_stats_init(void) | |
422 | { | |
423 | int i; | |
424 | ||
425 | if (all_counters) | |
426 | return; | |
427 | ||
e97d6bf1 | 428 | num_gpes = acpi_current_gpe_count; |
5229e87d LB |
429 | num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA; |
430 | ||
431 | all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1), | |
432 | GFP_KERNEL); | |
433 | if (all_attrs == NULL) | |
434 | return; | |
435 | ||
71b58cbb ZR |
436 | all_counters = kzalloc(sizeof(struct event_counter) * (num_counters), |
437 | GFP_KERNEL); | |
5229e87d LB |
438 | if (all_counters == NULL) |
439 | goto fail; | |
440 | ||
441 | counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters), | |
442 | GFP_KERNEL); | |
443 | if (counter_attrs == NULL) | |
444 | goto fail; | |
445 | ||
446 | for (i = 0; i < num_counters; ++i) { | |
c8dc9de1 | 447 | char buffer[12]; |
5229e87d LB |
448 | char *name; |
449 | ||
450 | if (i < num_gpes) | |
451 | sprintf(buffer, "gpe%02X", i); | |
452 | else if (i == num_gpes + ACPI_EVENT_PMTIMER) | |
453 | sprintf(buffer, "ff_pmtimer"); | |
454 | else if (i == num_gpes + ACPI_EVENT_GLOBAL) | |
455 | sprintf(buffer, "ff_gbl_lock"); | |
456 | else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON) | |
457 | sprintf(buffer, "ff_pwr_btn"); | |
458 | else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON) | |
459 | sprintf(buffer, "ff_slp_btn"); | |
460 | else if (i == num_gpes + ACPI_EVENT_RTC) | |
461 | sprintf(buffer, "ff_rt_clk"); | |
462 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE) | |
463 | sprintf(buffer, "gpe_all"); | |
464 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) | |
465 | sprintf(buffer, "sci"); | |
88bea188 LB |
466 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI_NOT) |
467 | sprintf(buffer, "sci_not"); | |
5229e87d LB |
468 | else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR) |
469 | sprintf(buffer, "error"); | |
470 | else | |
471 | sprintf(buffer, "bug%02X", i); | |
472 | ||
473 | name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); | |
474 | if (name == NULL) | |
475 | goto fail; | |
476 | strncpy(name, buffer, strlen(buffer) + 1); | |
477 | ||
478 | counter_attrs[i].attr.name = name; | |
479 | counter_attrs[i].attr.mode = 0644; | |
480 | counter_attrs[i].show = counter_show; | |
481 | counter_attrs[i].store = counter_set; | |
482 | ||
483 | all_attrs[i] = &counter_attrs[i].attr; | |
484 | } | |
485 | ||
486 | interrupt_stats_attr_group.attrs = all_attrs; | |
b7143156 LB |
487 | if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group)) |
488 | return; | |
5229e87d LB |
489 | |
490 | fail: | |
491 | delete_gpe_attr_array(); | |
492 | return; | |
493 | } | |
494 | ||
495 | static void __exit interrupt_stats_exit(void) | |
496 | { | |
497 | sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group); | |
498 | ||
499 | delete_gpe_attr_array(); | |
500 | ||
501 | return; | |
502 | } | |
503 | ||
1da177e4 LT |
504 | /* -------------------------------------------------------------------------- |
505 | FS Interface (/proc) | |
506 | -------------------------------------------------------------------------- */ | |
5bb730fd | 507 | #ifdef CONFIG_ACPI_PROCFS |
d4c5f047 ZR |
508 | #define ACPI_SYSTEM_FILE_INFO "info" |
509 | #define ACPI_SYSTEM_FILE_EVENT "event" | |
510 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" | |
511 | #define ACPI_SYSTEM_FILE_FADT "fadt" | |
1da177e4 | 512 | |
4be44fcd | 513 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 | 514 | { |
1da177e4 LT |
515 | |
516 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
d550d98d | 517 | return 0; |
1da177e4 LT |
518 | } |
519 | ||
520 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
521 | { | |
522 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
523 | } | |
524 | ||
d7508032 | 525 | static const struct file_operations acpi_system_info_ops = { |
cf7acfab | 526 | .owner = THIS_MODULE, |
4be44fcd LB |
527 | .open = acpi_system_info_open_fs, |
528 | .read = seq_read, | |
529 | .llseek = seq_lseek, | |
530 | .release = single_release, | |
1da177e4 LT |
531 | }; |
532 | ||
4be44fcd LB |
533 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
534 | loff_t *); | |
1da177e4 | 535 | |
d7508032 | 536 | static const struct file_operations acpi_system_dsdt_ops = { |
cf7acfab | 537 | .owner = THIS_MODULE, |
4be44fcd | 538 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
539 | }; |
540 | ||
541 | static ssize_t | |
4be44fcd LB |
542 | acpi_system_read_dsdt(struct file *file, |
543 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 544 | { |
4be44fcd | 545 | acpi_status status = AE_OK; |
ad71860a | 546 | struct acpi_table_header *dsdt = NULL; |
4be44fcd | 547 | ssize_t res; |
1da177e4 | 548 | |
ad71860a | 549 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
1da177e4 | 550 | if (ACPI_FAILURE(status)) |
d550d98d | 551 | return -ENODEV; |
1da177e4 | 552 | |
d4c5f047 | 553 | res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length); |
1da177e4 | 554 | |
d550d98d | 555 | return res; |
1da177e4 LT |
556 | } |
557 | ||
4be44fcd LB |
558 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
559 | loff_t *); | |
1da177e4 | 560 | |
d7508032 | 561 | static const struct file_operations acpi_system_fadt_ops = { |
cf7acfab | 562 | .owner = THIS_MODULE, |
4be44fcd | 563 | .read = acpi_system_read_fadt, |
1da177e4 LT |
564 | }; |
565 | ||
566 | static ssize_t | |
4be44fcd LB |
567 | acpi_system_read_fadt(struct file *file, |
568 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 569 | { |
4be44fcd | 570 | acpi_status status = AE_OK; |
ad71860a | 571 | struct acpi_table_header *fadt = NULL; |
4be44fcd | 572 | ssize_t res; |
1da177e4 | 573 | |
ad71860a | 574 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
1da177e4 | 575 | if (ACPI_FAILURE(status)) |
d550d98d | 576 | return -ENODEV; |
1da177e4 | 577 | |
d4c5f047 | 578 | res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length); |
1da177e4 | 579 | |
d550d98d | 580 | return res; |
1da177e4 LT |
581 | } |
582 | ||
d4c5f047 | 583 | static int acpi_system_procfs_init(void) |
1da177e4 | 584 | { |
4be44fcd | 585 | struct proc_dir_entry *entry; |
1da177e4 | 586 | int error = 0; |
1da177e4 | 587 | |
1da177e4 | 588 | /* 'info' [R] */ |
cf7acfab DL |
589 | entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir, |
590 | &acpi_system_info_ops); | |
1da177e4 LT |
591 | if (!entry) |
592 | goto Error; | |
1da177e4 LT |
593 | |
594 | /* 'dsdt' [R] */ | |
cf7acfab DL |
595 | entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir, |
596 | &acpi_system_dsdt_ops); | |
597 | if (!entry) | |
1da177e4 LT |
598 | goto Error; |
599 | ||
600 | /* 'fadt' [R] */ | |
cf7acfab DL |
601 | entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir, |
602 | &acpi_system_fadt_ops); | |
603 | if (!entry) | |
1da177e4 LT |
604 | goto Error; |
605 | ||
4be44fcd | 606 | Done: |
d550d98d | 607 | return error; |
1da177e4 | 608 | |
4be44fcd | 609 | Error: |
1da177e4 LT |
610 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
611 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
612 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
613 | ||
614 | error = -EFAULT; | |
615 | goto Done; | |
616 | } | |
d4c5f047 ZR |
617 | #else |
618 | static int acpi_system_procfs_init(void) | |
619 | { | |
620 | return 0; | |
621 | } | |
622 | #endif | |
623 | ||
141a0af3 | 624 | int __init acpi_system_init(void) |
d4c5f047 | 625 | { |
141a0af3 | 626 | int result; |
d4c5f047 ZR |
627 | |
628 | result = acpi_system_procfs_init(); | |
629 | if (result) | |
630 | return result; | |
631 | ||
632 | result = acpi_system_sysfs_init(); | |
633 | ||
634 | return result; | |
635 | } |