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/slab.h>
29 #include <linux/init.h>
30 #include <linux/string.h>
31 #include <asm/uaccess.h>
33 #include <acpi/acpi_drivers.h>
35 #define PREFIX "ACPI: "
37 #define _COMPONENT ACPI_SYSTEM_COMPONENT
38 ACPI_MODULE_NAME("system");
40 #define ACPI_SYSTEM_CLASS "system"
41 #define ACPI_SYSTEM_DEVICE_NAME "System"
43 /* --------------------------------------------------------------------------
45 -------------------------------------------------------------------------- */
46 #ifdef CONFIG_ACPI_PROCFS
47 #define ACPI_SYSTEM_FILE_INFO "info"
48 #define ACPI_SYSTEM_FILE_EVENT "event"
49 #define ACPI_SYSTEM_FILE_DSDT "dsdt"
50 #define ACPI_SYSTEM_FILE_FADT "fadt"
52 static int acpi_system_read_info(struct seq_file *seq, void *offset)
55 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
59 static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
61 return single_open(file, acpi_system_read_info, PDE(inode)->data);
64 static const struct file_operations acpi_system_info_ops = {
66 .open = acpi_system_info_open_fs,
69 .release = single_release,
72 static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
75 static const struct file_operations acpi_system_dsdt_ops = {
77 .read = acpi_system_read_dsdt,
81 acpi_system_read_dsdt(struct file *file,
82 char __user * buffer, size_t count, loff_t * ppos)
84 acpi_status status = AE_OK;
85 struct acpi_table_header *dsdt = NULL;
88 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
89 if (ACPI_FAILURE(status))
92 res = simple_read_from_buffer(buffer, count, ppos, dsdt, dsdt->length);
97 static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
100 static const struct file_operations acpi_system_fadt_ops = {
101 .owner = THIS_MODULE,
102 .read = acpi_system_read_fadt,
106 acpi_system_read_fadt(struct file *file,
107 char __user * buffer, size_t count, loff_t * ppos)
109 acpi_status status = AE_OK;
110 struct acpi_table_header *fadt = NULL;
113 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
114 if (ACPI_FAILURE(status))
117 res = simple_read_from_buffer(buffer, count, ppos, fadt, fadt->length);
122 static int acpi_system_procfs_init(void)
124 struct proc_dir_entry *entry;
128 entry = proc_create(ACPI_SYSTEM_FILE_INFO, S_IRUGO, acpi_root_dir,
129 &acpi_system_info_ops);
134 entry = proc_create(ACPI_SYSTEM_FILE_DSDT, S_IRUSR, acpi_root_dir,
135 &acpi_system_dsdt_ops);
140 entry = proc_create(ACPI_SYSTEM_FILE_FADT, S_IRUSR, acpi_root_dir,
141 &acpi_system_fadt_ops);
149 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
150 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
151 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
157 static int acpi_system_procfs_init(void)
163 int __init acpi_system_init(void)
167 result = acpi_system_procfs_init();