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 #define ACPI_SYSTEM_CLASS "system"
36 #define ACPI_SYSTEM_DRIVER_NAME "ACPI System Driver"
37 #define ACPI_SYSTEM_DEVICE_NAME "System"
38 #define ACPI_SYSTEM_FILE_INFO "info"
39 #define ACPI_SYSTEM_FILE_EVENT "event"
40 #define ACPI_SYSTEM_FILE_DSDT "dsdt"
41 #define ACPI_SYSTEM_FILE_FADT "fadt"
42 extern struct fadt_descriptor acpi_fadt;
44 /* --------------------------------------------------------------------------
46 -------------------------------------------------------------------------- */
48 static int acpi_system_read_info(struct seq_file *seq, void *offset)
51 seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
55 static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
57 return single_open(file, acpi_system_read_info, PDE(inode)->data);
60 static const struct file_operations acpi_system_info_ops = {
61 .open = acpi_system_info_open_fs,
64 .release = single_release,
67 static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t,
70 static const struct file_operations acpi_system_dsdt_ops = {
71 .read = acpi_system_read_dsdt,
75 acpi_system_read_dsdt(struct file *file,
76 char __user * buffer, size_t count, loff_t * ppos)
78 acpi_status status = AE_OK;
79 struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL };
83 status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt);
84 if (ACPI_FAILURE(status))
87 res = simple_read_from_buffer(buffer, count, ppos,
88 dsdt.pointer, dsdt.length);
94 static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t,
97 static const struct file_operations acpi_system_fadt_ops = {
98 .read = acpi_system_read_fadt,
102 acpi_system_read_fadt(struct file *file,
103 char __user * buffer, size_t count, loff_t * ppos)
105 acpi_status status = AE_OK;
106 struct acpi_buffer fadt = { ACPI_ALLOCATE_BUFFER, NULL };
110 status = acpi_get_table(ACPI_TABLE_ID_FADT, 1, &fadt);
111 if (ACPI_FAILURE(status))
114 res = simple_read_from_buffer(buffer, count, ppos,
115 fadt.pointer, fadt.length);
121 static int __init acpi_system_init(void)
123 struct proc_dir_entry *entry;
132 name = ACPI_SYSTEM_FILE_INFO;
133 entry = create_proc_entry(name, S_IRUGO, acpi_root_dir);
137 entry->proc_fops = &acpi_system_info_ops;
141 name = ACPI_SYSTEM_FILE_DSDT;
142 entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
144 entry->proc_fops = &acpi_system_dsdt_ops;
149 name = ACPI_SYSTEM_FILE_FADT;
150 entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
152 entry->proc_fops = &acpi_system_fadt_ops;
160 remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
161 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
162 remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
168 subsys_initcall(acpi_system_init);