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"
47 extern struct fadt_descriptor acpi_fadt
;
50 * Make ACPICA version work as module param
52 static int param_get_acpica_version(char *buffer
, struct kernel_param
*kp
) {
55 result
= sprintf(buffer
, "%x", ACPI_CA_VERSION
);
60 module_param_call(acpica_version
, NULL
, param_get_acpica_version
, NULL
, 0444);
62 /* --------------------------------------------------------------------------
64 -------------------------------------------------------------------------- */
65 #ifdef CONFIG_ACPI_PROCFS
67 static int acpi_system_read_info(struct seq_file
*seq
, void *offset
)
70 seq_printf(seq
, "version: %x\n", ACPI_CA_VERSION
);
74 static int acpi_system_info_open_fs(struct inode
*inode
, struct file
*file
)
76 return single_open(file
, acpi_system_read_info
, PDE(inode
)->data
);
79 static const struct file_operations acpi_system_info_ops
= {
80 .open
= acpi_system_info_open_fs
,
83 .release
= single_release
,
87 static ssize_t
acpi_system_read_dsdt(struct file
*, char __user
*, size_t,
90 static const struct file_operations acpi_system_dsdt_ops
= {
91 .read
= acpi_system_read_dsdt
,
95 acpi_system_read_dsdt(struct file
*file
,
96 char __user
* buffer
, size_t count
, loff_t
* ppos
)
98 acpi_status status
= AE_OK
;
99 struct acpi_buffer dsdt
= { ACPI_ALLOCATE_BUFFER
, NULL
};
103 status
= acpi_get_table(ACPI_TABLE_ID_DSDT
, 1, &dsdt
);
104 if (ACPI_FAILURE(status
))
107 res
= simple_read_from_buffer(buffer
, count
, ppos
,
108 dsdt
.pointer
, dsdt
.length
);
114 static ssize_t
acpi_system_read_fadt(struct file
*, char __user
*, size_t,
117 static const struct file_operations acpi_system_fadt_ops
= {
118 .read
= acpi_system_read_fadt
,
122 acpi_system_read_fadt(struct file
*file
,
123 char __user
* buffer
, size_t count
, loff_t
* ppos
)
125 acpi_status status
= AE_OK
;
126 struct acpi_buffer fadt
= { ACPI_ALLOCATE_BUFFER
, NULL
};
130 status
= acpi_get_table(ACPI_TABLE_ID_FADT
, 1, &fadt
);
131 if (ACPI_FAILURE(status
))
134 res
= simple_read_from_buffer(buffer
, count
, ppos
,
135 fadt
.pointer
, fadt
.length
);
141 static int __init
acpi_system_init(void)
143 struct proc_dir_entry
*entry
;
151 #ifdef CONFIG_ACPI_PROCFS
153 name
= ACPI_SYSTEM_FILE_INFO
;
154 entry
= create_proc_entry(name
, S_IRUGO
, acpi_root_dir
);
158 entry
->proc_fops
= &acpi_system_info_ops
;
163 name
= ACPI_SYSTEM_FILE_DSDT
;
164 entry
= create_proc_entry(name
, S_IRUSR
, acpi_root_dir
);
166 entry
->proc_fops
= &acpi_system_dsdt_ops
;
171 name
= ACPI_SYSTEM_FILE_FADT
;
172 entry
= create_proc_entry(name
, S_IRUSR
, acpi_root_dir
);
174 entry
->proc_fops
= &acpi_system_fadt_ops
;
182 remove_proc_entry(ACPI_SYSTEM_FILE_FADT
, acpi_root_dir
);
183 remove_proc_entry(ACPI_SYSTEM_FILE_DSDT
, acpi_root_dir
);
184 #ifdef CONFIG_ACPI_PROCFS
185 remove_proc_entry(ACPI_SYSTEM_FILE_INFO
, acpi_root_dir
);
192 subsys_initcall(acpi_system_init
);