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