x86: microcode_amd: fix typos and trailing whitespaces in log messages
[linux-2.6/mini2440.git] / drivers / acpi / system.c
blob6e4107f824039bdee65174c38dbcce06672ee119
1 /*
2 * acpi_system.c - ACPI System Driver ($Revision: 63 $)
4 * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
5 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
23 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
26 #include <linux/proc_fs.h>
27 #include <linux/seq_file.h>
28 #include <linux/init.h>
29 #include <linux/string.h>
30 #include <asm/uaccess.h>
32 #include <acpi/acpi_drivers.h>
34 #define _COMPONENT ACPI_SYSTEM_COMPONENT
35 ACPI_MODULE_NAME("system");
36 #ifdef MODULE_PARAM_PREFIX
37 #undef MODULE_PARAM_PREFIX
38 #endif
39 #define MODULE_PARAM_PREFIX "acpi."
41 #define ACPI_SYSTEM_CLASS "system"
42 #define ACPI_SYSTEM_DEVICE_NAME "System"
44 u32 acpi_irq_handled;
47 * Make ACPICA version work as module param
49 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
51 int result;
53 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
55 return result;
58 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
60 /* --------------------------------------------------------------------------
61 FS Interface (/sys)
62 -------------------------------------------------------------------------- */
63 static LIST_HEAD(acpi_table_attr_list);
64 static struct kobject *tables_kobj;
66 struct acpi_table_attr {
67 struct bin_attribute attr;
68 char name[8];
69 int instance;
70 struct list_head node;
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)
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;
81 char name[ACPI_NAME_SIZE];
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);
88 status =
89 acpi_get_table(name, table_attr->instance,
90 &table_header);
91 if (ACPI_FAILURE(status))
92 return -ENODEV;
94 return memory_read_from_buffer(buf, count, &offset,
95 table_header, table_header->length);
98 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
99 struct acpi_table_header *table_header)
101 struct acpi_table_header *header = NULL;
102 struct acpi_table_attr *attr = NULL;
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);
110 list_for_each_entry(attr, &acpi_table_attr_list, node) {
111 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
112 if (table_attr->instance < attr->instance)
113 table_attr->instance = attr->instance;
115 table_attr->instance++;
117 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
118 !acpi_get_table
119 (table_header->signature, 2, &header)))
120 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
121 table_attr->instance);
123 table_attr->attr.size = 0;
124 table_attr->attr.read = acpi_table_show;
125 table_attr->attr.attr.name = table_attr->name;
126 table_attr->attr.attr.mode = 0444;
128 return;
131 static int acpi_system_sysfs_init(void)
133 struct acpi_table_attr *table_attr;
134 struct acpi_table_header *table_header = NULL;
135 int table_index = 0;
136 int result;
138 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
139 if (!tables_kobj)
140 return -ENOMEM;
142 do {
143 result = acpi_get_table_by_index(table_index, &table_header);
144 if (!result) {
145 table_index++;
146 table_attr = NULL;
147 table_attr =
148 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
149 if (!table_attr)
150 return -ENOMEM;
152 acpi_table_attr_init(table_attr, table_header);
153 result =
154 sysfs_create_bin_file(tables_kobj,
155 &table_attr->attr);
156 if (result) {
157 kfree(table_attr);
158 return result;
159 } else
160 list_add_tail(&table_attr->node,
161 &acpi_table_attr_list);
163 } while (!result);
164 kobject_uevent(tables_kobj, KOBJ_ADD);
166 return 0;
170 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
171 * See Documentation/ABI/testing/sysfs-firmware-acpi
174 #define COUNT_GPE 0
175 #define COUNT_SCI 1 /* acpi_irq_handled */
176 #define COUNT_ERROR 2 /* other */
177 #define NUM_COUNTERS_EXTRA 3
179 struct event_counter {
180 u32 count;
181 u32 flags;
184 static struct event_counter *all_counters;
185 static u32 num_gpes;
186 static u32 num_counters;
187 static struct attribute **all_attrs;
188 static u32 acpi_gpe_count;
190 static struct attribute_group interrupt_stats_attr_group = {
191 .name = "interrupts",
193 static struct kobj_attribute *counter_attrs;
195 static int count_num_gpes(void)
197 int count = 0;
198 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
199 struct acpi_gpe_block_info *gpe_block;
200 acpi_cpu_flags flags;
202 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
204 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
205 while (gpe_xrupt_info) {
206 gpe_block = gpe_xrupt_info->gpe_block_list_head;
207 while (gpe_block) {
208 count += gpe_block->register_count *
209 ACPI_GPE_REGISTER_WIDTH;
210 gpe_block = gpe_block->next;
212 gpe_xrupt_info = gpe_xrupt_info->next;
214 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
216 return count;
219 static int get_gpe_device(int index, acpi_handle *handle)
221 struct acpi_gpe_xrupt_info *gpe_xrupt_info;
222 struct acpi_gpe_block_info *gpe_block;
223 acpi_cpu_flags flags;
224 struct acpi_namespace_node *node;
226 flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
228 gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
229 while (gpe_xrupt_info) {
230 gpe_block = gpe_xrupt_info->gpe_block_list_head;
231 node = gpe_block->node;
232 while (gpe_block) {
233 index -= gpe_block->register_count *
234 ACPI_GPE_REGISTER_WIDTH;
235 if (index < 0) {
236 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
237 /* return NULL if it's FADT GPE */
238 if (node->type != ACPI_TYPE_DEVICE)
239 *handle = NULL;
240 else
241 *handle = node;
242 return 0;
244 node = gpe_block->node;
245 gpe_block = gpe_block->next;
247 gpe_xrupt_info = gpe_xrupt_info->next;
249 acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
251 return -ENODEV;
254 static void delete_gpe_attr_array(void)
256 struct event_counter *tmp = all_counters;
258 all_counters = NULL;
259 kfree(tmp);
261 if (counter_attrs) {
262 int i;
264 for (i = 0; i < num_gpes; i++)
265 kfree(counter_attrs[i].attr.name);
267 kfree(counter_attrs);
269 kfree(all_attrs);
271 return;
274 void acpi_os_gpe_count(u32 gpe_number)
276 acpi_gpe_count++;
278 if (!all_counters)
279 return;
281 if (gpe_number < num_gpes)
282 all_counters[gpe_number].count++;
283 else
284 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
285 count++;
287 return;
290 void acpi_os_fixed_event_count(u32 event_number)
292 if (!all_counters)
293 return;
295 if (event_number < ACPI_NUM_FIXED_EVENTS)
296 all_counters[num_gpes + event_number].count++;
297 else
298 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
299 count++;
301 return;
304 static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
306 int result = 0;
308 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
309 goto end;
311 if (index < num_gpes) {
312 result = get_gpe_device(index, handle);
313 if (result) {
314 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
315 "Invalid GPE 0x%x\n", index));
316 goto end;
318 result = acpi_get_gpe_status(*handle, index,
319 ACPI_NOT_ISR, status);
320 } else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
321 result = acpi_get_event_status(index - num_gpes, status);
323 end:
324 return result;
327 static ssize_t counter_show(struct kobject *kobj,
328 struct kobj_attribute *attr, char *buf)
330 int index = attr - counter_attrs;
331 int size;
332 acpi_handle handle;
333 acpi_event_status status;
334 int result = 0;
336 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
337 acpi_irq_handled;
338 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
339 acpi_gpe_count;
341 size = sprintf(buf, "%8d", all_counters[index].count);
343 /* "gpe_all" or "sci" */
344 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
345 goto end;
347 result = get_status(index, &status, &handle);
348 if (result)
349 goto end;
351 if (!(status & ACPI_EVENT_FLAG_HANDLE))
352 size += sprintf(buf + size, " invalid");
353 else if (status & ACPI_EVENT_FLAG_ENABLED)
354 size += sprintf(buf + size, " enabled");
355 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
356 size += sprintf(buf + size, " wake_enabled");
357 else
358 size += sprintf(buf + size, " disabled");
360 end:
361 size += sprintf(buf + size, "\n");
362 return result ? result : size;
366 * counter_set() sets the specified counter.
367 * setting the total "sci" file to any value clears all counters.
368 * enable/disable/clear a gpe/fixed event in user space.
370 static ssize_t counter_set(struct kobject *kobj,
371 struct kobj_attribute *attr, const char *buf, size_t size)
373 int index = attr - counter_attrs;
374 acpi_event_status status;
375 acpi_handle handle;
376 int result = 0;
378 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
379 int i;
380 for (i = 0; i < num_counters; ++i)
381 all_counters[i].count = 0;
382 acpi_gpe_count = 0;
383 acpi_irq_handled = 0;
384 goto end;
387 /* show the event status for both GPEs and Fixed Events */
388 result = get_status(index, &status, &handle);
389 if (result)
390 goto end;
392 if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
393 printk(KERN_WARNING PREFIX
394 "Can not change Invalid GPE/Fixed Event status\n");
395 return -EINVAL;
398 if (index < num_gpes) {
399 if (!strcmp(buf, "disable\n") &&
400 (status & ACPI_EVENT_FLAG_ENABLED))
401 result = acpi_disable_gpe(handle, index);
402 else if (!strcmp(buf, "enable\n") &&
403 !(status & ACPI_EVENT_FLAG_ENABLED))
404 result = acpi_enable_gpe(handle, index);
405 else if (!strcmp(buf, "clear\n") &&
406 (status & ACPI_EVENT_FLAG_SET))
407 result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
408 else
409 all_counters[index].count = strtoul(buf, NULL, 0);
410 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
411 int event = index - num_gpes;
412 if (!strcmp(buf, "disable\n") &&
413 (status & ACPI_EVENT_FLAG_ENABLED))
414 result = acpi_disable_event(event, ACPI_NOT_ISR);
415 else if (!strcmp(buf, "enable\n") &&
416 !(status & ACPI_EVENT_FLAG_ENABLED))
417 result = acpi_enable_event(event, ACPI_NOT_ISR);
418 else if (!strcmp(buf, "clear\n") &&
419 (status & ACPI_EVENT_FLAG_SET))
420 result = acpi_clear_event(event);
421 else
422 all_counters[index].count = strtoul(buf, NULL, 0);
423 } else
424 all_counters[index].count = strtoul(buf, NULL, 0);
426 if (ACPI_FAILURE(result))
427 result = -EINVAL;
428 end:
429 return result ? result : size;
432 void acpi_irq_stats_init(void)
434 int i;
436 if (all_counters)
437 return;
439 num_gpes = count_num_gpes();
440 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
442 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
443 GFP_KERNEL);
444 if (all_attrs == NULL)
445 return;
447 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
448 GFP_KERNEL);
449 if (all_counters == NULL)
450 goto fail;
452 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
453 GFP_KERNEL);
454 if (counter_attrs == NULL)
455 goto fail;
457 for (i = 0; i < num_counters; ++i) {
458 char buffer[12];
459 char *name;
461 if (i < num_gpes)
462 sprintf(buffer, "gpe%02X", i);
463 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
464 sprintf(buffer, "ff_pmtimer");
465 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
466 sprintf(buffer, "ff_gbl_lock");
467 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
468 sprintf(buffer, "ff_pwr_btn");
469 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
470 sprintf(buffer, "ff_slp_btn");
471 else if (i == num_gpes + ACPI_EVENT_RTC)
472 sprintf(buffer, "ff_rt_clk");
473 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
474 sprintf(buffer, "gpe_all");
475 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
476 sprintf(buffer, "sci");
477 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
478 sprintf(buffer, "error");
479 else
480 sprintf(buffer, "bug%02X", i);
482 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
483 if (name == NULL)
484 goto fail;
485 strncpy(name, buffer, strlen(buffer) + 1);
487 counter_attrs[i].attr.name = name;
488 counter_attrs[i].attr.mode = 0644;
489 counter_attrs[i].show = counter_show;
490 counter_attrs[i].store = counter_set;
492 all_attrs[i] = &counter_attrs[i].attr;
495 interrupt_stats_attr_group.attrs = all_attrs;
496 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
497 return;
499 fail:
500 delete_gpe_attr_array();
501 return;
504 static void __exit interrupt_stats_exit(void)
506 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
508 delete_gpe_attr_array();
510 return;
513 /* --------------------------------------------------------------------------
514 FS Interface (/proc)
515 -------------------------------------------------------------------------- */
516 #ifdef CONFIG_ACPI_PROCFS
517 #define ACPI_SYSTEM_FILE_INFO "info"
518 #define ACPI_SYSTEM_FILE_EVENT "event"
519 #define ACPI_SYSTEM_FILE_DSDT "dsdt"
520 #define ACPI_SYSTEM_FILE_FADT "fadt"
522 static int acpi_system_read_info(struct seq_file *seq, void *offset)
525 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
526 return 0;
529 static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
531 return single_open(file, acpi_system_read_info, PDE(inode)->data);
534 static const struct file_operations acpi_system_info_ops = {
535 .owner = THIS_MODULE,
536 .open = acpi_system_info_open_fs,
537 .read = seq_read,
538 .llseek = seq_lseek,
539 .release = single_release,
542 static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
543 loff_t *);
545 static const struct file_operations acpi_system_dsdt_ops = {
546 .owner = THIS_MODULE,
547 .read = acpi_system_read_dsdt,
550 static ssize_t
551 acpi_system_read_dsdt(struct file *file,
552 char __user * buffer, size_t count, loff_t * ppos)
554 acpi_status status = AE_OK;
555 struct acpi_table_header *dsdt = NULL;
556 ssize_t res;
558 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
559 if (ACPI_FAILURE(status))
560 return -ENODEV;
562 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
564 return res;
567 static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
568 loff_t *);
570 static const struct file_operations acpi_system_fadt_ops = {
571 .owner = THIS_MODULE,
572 .read = acpi_system_read_fadt,
575 static ssize_t
576 acpi_system_read_fadt(struct file *file,
577 char __user * buffer, size_t count, loff_t * ppos)
579 acpi_status status = AE_OK;
580 struct acpi_table_header *fadt = NULL;
581 ssize_t res;
583 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
584 if (ACPI_FAILURE(status))
585 return -ENODEV;
587 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
589 return res;
592 static int acpi_system_procfs_init(void)
594 struct proc_dir_entry *entry;
595 int error = 0;
597 /* 'info' [R] */
598 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
599 &acpi_system_info_ops);
600 if (!entry)
601 goto Error;
603 /* 'dsdt' [R] */
604 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
605 &acpi_system_dsdt_ops);
606 if (!entry)
607 goto Error;
609 /* 'fadt' [R] */
610 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
611 &acpi_system_fadt_ops);
612 if (!entry)
613 goto Error;
615 Done:
616 return error;
618 Error:
619 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
620 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
621 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
623 error = -EFAULT;
624 goto Done;
626 #else
627 static int acpi_system_procfs_init(void)
629 return 0;
631 #endif
633 static int __init acpi_system_init(void)
635 int result = 0;
637 if (acpi_disabled)
638 return 0;
640 result = acpi_system_procfs_init();
641 if (result)
642 return result;
644 result = acpi_system_sysfs_init();
646 return result;
649 subsys_initcall(acpi_system_init);