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
39 #define MODULE_PARAM_PREFIX "acpi."
41 #define ACPI_SYSTEM_CLASS "system"
42 #define ACPI_SYSTEM_DEVICE_NAME "System"
47 * Make ACPICA version work as module param
49 static int param_get_acpica_version(char *buffer, struct kernel_param *kp)
53 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
58 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
60 /* --------------------------------------------------------------------------
62 -------------------------------------------------------------------------- */
63 static LIST_HEAD(acpi_table_attr_list);
64 static struct kobject *tables_kobj;
65 static struct kobject *dynamic_tables_kobj;
67 struct acpi_table_attr {
68 struct bin_attribute attr;
71 struct list_head node;
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)
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;
82 char name[ACPI_NAME_SIZE];
84 if (strncmp(table_attr->name, "NULL", 4))
85 memcpy(name, table_attr->name, ACPI_NAME_SIZE);
87 memcpy(name, "\0\0\0\0", 4);
90 acpi_get_table(name, table_attr->instance,
92 if (ACPI_FAILURE(status))
95 return memory_read_from_buffer(buf, count, &offset,
96 table_header, table_header->length);
99 static void acpi_table_attr_init(struct acpi_table_attr *table_attr,
100 struct acpi_table_header *table_header)
102 struct acpi_table_header *header = NULL;
103 struct acpi_table_attr *attr = NULL;
105 if (table_header->signature[0] != '\0')
106 memcpy(table_attr->name, table_header->signature,
109 memcpy(table_attr->name, "NULL", 4);
111 list_for_each_entry(attr, &acpi_table_attr_list, node) {
112 if (!memcmp(table_attr->name, attr->name, ACPI_NAME_SIZE))
113 if (table_attr->instance < attr->instance)
114 table_attr->instance = attr->instance;
116 table_attr->instance++;
118 if (table_attr->instance > 1 || (table_attr->instance == 1 &&
120 (table_header->signature, 2, &header)))
121 sprintf(table_attr->name + ACPI_NAME_SIZE, "%d",
122 table_attr->instance);
124 table_attr->attr.size = 0;
125 table_attr->attr.read = acpi_table_show;
126 table_attr->attr.attr.name = table_attr->name;
127 table_attr->attr.attr.mode = 0444;
133 acpi_sysfs_table_handler(u32 event, void *table, void *context)
135 struct acpi_table_attr *table_attr;
138 case ACPI_TABLE_EVENT_LOAD:
140 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
144 acpi_table_attr_init(table_attr, table);
145 if (sysfs_create_bin_file(dynamic_tables_kobj,
146 &table_attr->attr)) {
150 list_add_tail(&table_attr->node,
151 &acpi_table_attr_list);
153 case ACPI_TABLE_EVENT_UNLOAD:
155 * we do not need to do anything right now
156 * because the table is not deleted from the
157 * global table list when unloading it.
161 return AE_BAD_PARAMETER;
166 static int acpi_system_sysfs_init(void)
168 struct acpi_table_attr *table_attr;
169 struct acpi_table_header *table_header = NULL;
173 tables_kobj = kobject_create_and_add("tables", acpi_kobj);
177 dynamic_tables_kobj = kobject_create_and_add("dynamic", tables_kobj);
178 if (!dynamic_tables_kobj)
179 goto err_dynamic_tables;
182 result = acpi_get_table_by_index(table_index, &table_header);
187 kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL);
191 acpi_table_attr_init(table_attr, table_header);
193 sysfs_create_bin_file(tables_kobj,
199 list_add_tail(&table_attr->node,
200 &acpi_table_attr_list);
203 kobject_uevent(tables_kobj, KOBJ_ADD);
204 kobject_uevent(dynamic_tables_kobj, KOBJ_ADD);
205 result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL);
207 return result == AE_OK ? 0 : -EINVAL;
209 kobject_put(tables_kobj);
215 * Detailed ACPI IRQ counters in /sys/firmware/acpi/interrupts/
216 * See Documentation/ABI/testing/sysfs-firmware-acpi
220 #define COUNT_SCI 1 /* acpi_irq_handled */
221 #define COUNT_ERROR 2 /* other */
222 #define NUM_COUNTERS_EXTRA 3
224 struct event_counter {
229 static struct event_counter *all_counters;
231 static u32 num_counters;
232 static struct attribute **all_attrs;
233 static u32 acpi_gpe_count;
235 static struct attribute_group interrupt_stats_attr_group = {
236 .name = "interrupts",
238 static struct kobj_attribute *counter_attrs;
240 static void delete_gpe_attr_array(void)
242 struct event_counter *tmp = all_counters;
250 for (i = 0; i < num_gpes; i++)
251 kfree(counter_attrs[i].attr.name);
253 kfree(counter_attrs);
260 void acpi_os_gpe_count(u32 gpe_number)
267 if (gpe_number < num_gpes)
268 all_counters[gpe_number].count++;
270 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
276 void acpi_os_fixed_event_count(u32 event_number)
281 if (event_number < ACPI_NUM_FIXED_EVENTS)
282 all_counters[num_gpes + event_number].count++;
284 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR].
290 static int get_status(u32 index, acpi_event_status *status, acpi_handle *handle)
294 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
297 if (index < num_gpes) {
298 result = acpi_get_gpe_device(index, handle);
300 ACPI_EXCEPTION((AE_INFO, AE_NOT_FOUND,
301 "Invalid GPE 0x%x\n", index));
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);
313 static ssize_t counter_show(struct kobject *kobj,
314 struct kobj_attribute *attr, char *buf)
316 int index = attr - counter_attrs;
319 acpi_event_status status;
322 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI].count =
324 all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count =
327 size = sprintf(buf, "%8d", all_counters[index].count);
329 /* "gpe_all" or "sci" */
330 if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS)
333 result = get_status(index, &status, &handle);
337 if (!(status & ACPI_EVENT_FLAG_HANDLE))
338 size += sprintf(buf + size, " invalid");
339 else if (status & ACPI_EVENT_FLAG_ENABLED)
340 size += sprintf(buf + size, " enabled");
341 else if (status & ACPI_EVENT_FLAG_WAKE_ENABLED)
342 size += sprintf(buf + size, " wake_enabled");
344 size += sprintf(buf + size, " disabled");
347 size += sprintf(buf + size, "\n");
348 return result ? result : size;
352 * counter_set() sets the specified counter.
353 * setting the total "sci" file to any value clears all counters.
354 * enable/disable/clear a gpe/fixed event in user space.
356 static ssize_t counter_set(struct kobject *kobj,
357 struct kobj_attribute *attr, const char *buf, size_t size)
359 int index = attr - counter_attrs;
360 acpi_event_status status;
364 if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) {
366 for (i = 0; i < num_counters; ++i)
367 all_counters[i].count = 0;
369 acpi_irq_handled = 0;
373 /* show the event status for both GPEs and Fixed Events */
374 result = get_status(index, &status, &handle);
378 if (!(status & ACPI_EVENT_FLAG_HANDLE)) {
379 printk(KERN_WARNING PREFIX
380 "Can not change Invalid GPE/Fixed Event status\n");
384 if (index < num_gpes) {
385 if (!strcmp(buf, "disable\n") &&
386 (status & ACPI_EVENT_FLAG_ENABLED))
387 result = acpi_disable_gpe(handle, index);
388 else if (!strcmp(buf, "enable\n") &&
389 !(status & ACPI_EVENT_FLAG_ENABLED))
390 result = acpi_enable_gpe(handle, index);
391 else if (!strcmp(buf, "clear\n") &&
392 (status & ACPI_EVENT_FLAG_SET))
393 result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
395 all_counters[index].count = strtoul(buf, NULL, 0);
396 } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
397 int event = index - num_gpes;
398 if (!strcmp(buf, "disable\n") &&
399 (status & ACPI_EVENT_FLAG_ENABLED))
400 result = acpi_disable_event(event, ACPI_NOT_ISR);
401 else if (!strcmp(buf, "enable\n") &&
402 !(status & ACPI_EVENT_FLAG_ENABLED))
403 result = acpi_enable_event(event, ACPI_NOT_ISR);
404 else if (!strcmp(buf, "clear\n") &&
405 (status & ACPI_EVENT_FLAG_SET))
406 result = acpi_clear_event(event);
408 all_counters[index].count = strtoul(buf, NULL, 0);
410 all_counters[index].count = strtoul(buf, NULL, 0);
412 if (ACPI_FAILURE(result))
415 return result ? result : size;
418 void acpi_irq_stats_init(void)
425 num_gpes = acpi_current_gpe_count;
426 num_counters = num_gpes + ACPI_NUM_FIXED_EVENTS + NUM_COUNTERS_EXTRA;
428 all_attrs = kzalloc(sizeof(struct attribute *) * (num_counters + 1),
430 if (all_attrs == NULL)
433 all_counters = kzalloc(sizeof(struct event_counter) * (num_counters),
435 if (all_counters == NULL)
438 counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
440 if (counter_attrs == NULL)
443 for (i = 0; i < num_counters; ++i) {
448 sprintf(buffer, "gpe%02X", i);
449 else if (i == num_gpes + ACPI_EVENT_PMTIMER)
450 sprintf(buffer, "ff_pmtimer");
451 else if (i == num_gpes + ACPI_EVENT_GLOBAL)
452 sprintf(buffer, "ff_gbl_lock");
453 else if (i == num_gpes + ACPI_EVENT_POWER_BUTTON)
454 sprintf(buffer, "ff_pwr_btn");
455 else if (i == num_gpes + ACPI_EVENT_SLEEP_BUTTON)
456 sprintf(buffer, "ff_slp_btn");
457 else if (i == num_gpes + ACPI_EVENT_RTC)
458 sprintf(buffer, "ff_rt_clk");
459 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE)
460 sprintf(buffer, "gpe_all");
461 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI)
462 sprintf(buffer, "sci");
463 else if (i == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_ERROR)
464 sprintf(buffer, "error");
466 sprintf(buffer, "bug%02X", i);
468 name = kzalloc(strlen(buffer) + 1, GFP_KERNEL);
471 strncpy(name, buffer, strlen(buffer) + 1);
473 counter_attrs[i].attr.name = name;
474 counter_attrs[i].attr.mode = 0644;
475 counter_attrs[i].show = counter_show;
476 counter_attrs[i].store = counter_set;
478 all_attrs[i] = &counter_attrs[i].attr;
481 interrupt_stats_attr_group.attrs = all_attrs;
482 if (!sysfs_create_group(acpi_kobj, &interrupt_stats_attr_group))
486 delete_gpe_attr_array();
490 static void __exit interrupt_stats_exit(void)
492 sysfs_remove_group(acpi_kobj, &interrupt_stats_attr_group);
494 delete_gpe_attr_array();
499 /* --------------------------------------------------------------------------
501 -------------------------------------------------------------------------- */
502 #ifdef CONFIG_ACPI_PROCFS
503 #define ACPI_SYSTEM_FILE_INFO "info"
504 #define ACPI_SYSTEM_FILE_EVENT "event"
505 #define ACPI_SYSTEM_FILE_DSDT "dsdt"
506 #define ACPI_SYSTEM_FILE_FADT "fadt"
508 static int acpi_system_read_info(struct seq_file *seq, void *offset)
511 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
515 static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
517 return single_open(file, acpi_system_read_info, PDE(inode)->data);
520 static const struct file_operations acpi_system_info_ops = {
521 .owner = THIS_MODULE,
522 .open = acpi_system_info_open_fs,
525 .release = single_release,
528 static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
531 static const struct file_operations acpi_system_dsdt_ops = {
532 .owner = THIS_MODULE,
533 .read = acpi_system_read_dsdt,
537 acpi_system_read_dsdt(struct file *file,
538 char __user * buffer, size_t count, loff_t * ppos)
540 acpi_status status = AE_OK;
541 struct acpi_table_header *dsdt = NULL;
544 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
545 if (ACPI_FAILURE(status))
548 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
553 static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
556 static const struct file_operations acpi_system_fadt_ops = {
557 .owner = THIS_MODULE,
558 .read = acpi_system_read_fadt,
562 acpi_system_read_fadt(struct file *file,
563 char __user * buffer, size_t count, loff_t * ppos)
565 acpi_status status = AE_OK;
566 struct acpi_table_header *fadt = NULL;
569 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
570 if (ACPI_FAILURE(status))
573 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
578 static int acpi_system_procfs_init(void)
580 struct proc_dir_entry *entry;
584 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
585 &acpi_system_info_ops);
590 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
591 &acpi_system_dsdt_ops);
596 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
597 &acpi_system_fadt_ops);
605 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
606 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
607 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
613 static int acpi_system_procfs_init(void)
619 int __init acpi_system_init(void)
623 result = acpi_system_procfs_init();
627 result = acpi_system_sysfs_init();