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 <asm/uaccess.h>
31 #include <acpi/acpi_drivers.h>
33 #define _COMPONENT ACPI_SYSTEM_COMPONENT
34 ACPI_MODULE_NAME("acpi_system")
35 #ifdef MODULE_PARAM_PREFIX
36 #undef MODULE_PARAM_PREFIX
38 #define MODULE_PARAM_PREFIX "acpi."
40 #define ACPI_SYSTEM_CLASS "system"
41 #define ACPI_SYSTEM_DRIVER_NAME "ACPI System Driver"
42 #define ACPI_SYSTEM_DEVICE_NAME "System"
43 #define ACPI_SYSTEM_FILE_INFO "info"
44 #define ACPI_SYSTEM_FILE_EVENT "event"
45 #define ACPI_SYSTEM_FILE_DSDT "dsdt"
46 #define ACPI_SYSTEM_FILE_FADT "fadt"
49 * Make ACPICA version work as module param
51 static int param_get_acpica_version(char *buffer, struct kernel_param *kp) {
54 result = sprintf(buffer, "%x", ACPI_CA_VERSION);
59 module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444);
61 /* --------------------------------------------------------------------------
63 -------------------------------------------------------------------------- */
64 #ifdef CONFIG_ACPI_PROCFS
66 static int acpi_system_read_info(struct seq_file *seq, void *offset)
69 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
73 static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
75 return single_open(file, acpi_system_read_info, PDE(inode)->data);
78 static const struct file_operations acpi_system_info_ops = {
79 .open = acpi_system_info_open_fs,
82 .release = single_release,
86 static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
89 static const struct file_operations acpi_system_dsdt_ops = {
90 .read = acpi_system_read_dsdt,
94 acpi_system_read_dsdt(struct file *file,
95 char __user * buffer, size_t count, loff_t * ppos)
97 acpi_status status = AE_OK;
98 struct acpi_table_header *dsdt = NULL;
102 status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt);
103 if (ACPI_FAILURE(status))
106 res = simple_read_from_buffer(buffer, count, ppos,
112 static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
115 static const struct file_operations acpi_system_fadt_ops = {
116 .read = acpi_system_read_fadt,
120 acpi_system_read_fadt(struct file *file,
121 char __user * buffer, size_t count, loff_t * ppos)
123 acpi_status status = AE_OK;
124 struct acpi_table_header *fadt = NULL;
128 status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt);
129 if (ACPI_FAILURE(status))
132 res = simple_read_from_buffer(buffer, count, ppos,
138 static int __init acpi_system_init(void)
140 struct proc_dir_entry *entry;
148 #ifdef CONFIG_ACPI_PROCFS
150 name = ACPI_SYSTEM_FILE_INFO;
151 entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
155 entry->proc_fops = &acpi_system_info_ops;
160 name = ACPI_SYSTEM_FILE_DSDT;
161 entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
163 entry->proc_fops = &acpi_system_dsdt_ops;
168 name = ACPI_SYSTEM_FILE_FADT;
169 entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
171 entry->proc_fops = &acpi_system_fadt_ops;
179 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
180 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
181 #ifdef CONFIG_ACPI_PROCFS
182 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
189 subsys_initcall(acpi_system_init);