]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acpi_system.c - ACPI System Driver ($Revision: 63 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * | |
7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
8 | * | |
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. | |
13 | * | |
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. | |
18 | * | |
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. | |
22 | * | |
23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
24 | */ | |
25 | ||
26 | #include <linux/proc_fs.h> | |
27 | #include <linux/seq_file.h> | |
28 | #include <linux/init.h> | |
29 | #include <asm/uaccess.h> | |
30 | ||
31 | #include <acpi/acpi_drivers.h> | |
32 | ||
1da177e4 | 33 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
4be44fcd | 34 | ACPI_MODULE_NAME("acpi_system") |
1da177e4 LT |
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" | |
4be44fcd | 42 | extern FADT_DESCRIPTOR acpi_fadt; |
1da177e4 LT |
43 | |
44 | /* -------------------------------------------------------------------------- | |
45 | FS Interface (/proc) | |
46 | -------------------------------------------------------------------------- */ | |
47 | ||
4be44fcd | 48 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
1da177e4 LT |
49 | { |
50 | ACPI_FUNCTION_TRACE("acpi_system_read_info"); | |
51 | ||
52 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); | |
53 | return_VALUE(0); | |
54 | } | |
55 | ||
56 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) | |
57 | { | |
58 | return single_open(file, acpi_system_read_info, PDE(inode)->data); | |
59 | } | |
60 | ||
61 | static struct file_operations acpi_system_info_ops = { | |
4be44fcd LB |
62 | .open = acpi_system_info_open_fs, |
63 | .read = seq_read, | |
64 | .llseek = seq_lseek, | |
65 | .release = single_release, | |
1da177e4 LT |
66 | }; |
67 | ||
4be44fcd LB |
68 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
69 | loff_t *); | |
1da177e4 LT |
70 | |
71 | static struct file_operations acpi_system_dsdt_ops = { | |
4be44fcd | 72 | .read = acpi_system_read_dsdt, |
1da177e4 LT |
73 | }; |
74 | ||
75 | static ssize_t | |
4be44fcd LB |
76 | acpi_system_read_dsdt(struct file *file, |
77 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 78 | { |
4be44fcd LB |
79 | acpi_status status = AE_OK; |
80 | struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL }; | |
81 | ssize_t res; | |
1da177e4 LT |
82 | |
83 | ACPI_FUNCTION_TRACE("acpi_system_read_dsdt"); | |
84 | ||
85 | status = acpi_get_table(ACPI_TABLE_DSDT, 1, &dsdt); | |
86 | if (ACPI_FAILURE(status)) | |
87 | return_VALUE(-ENODEV); | |
88 | ||
89 | res = simple_read_from_buffer(buffer, count, ppos, | |
90 | dsdt.pointer, dsdt.length); | |
91 | acpi_os_free(dsdt.pointer); | |
92 | ||
93 | return_VALUE(res); | |
94 | } | |
95 | ||
4be44fcd LB |
96 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
97 | loff_t *); | |
1da177e4 LT |
98 | |
99 | static struct file_operations acpi_system_fadt_ops = { | |
4be44fcd | 100 | .read = acpi_system_read_fadt, |
1da177e4 LT |
101 | }; |
102 | ||
103 | static ssize_t | |
4be44fcd LB |
104 | acpi_system_read_fadt(struct file *file, |
105 | char __user * buffer, size_t count, loff_t * ppos) | |
1da177e4 | 106 | { |
4be44fcd LB |
107 | acpi_status status = AE_OK; |
108 | struct acpi_buffer fadt = { ACPI_ALLOCATE_BUFFER, NULL }; | |
109 | ssize_t res; | |
1da177e4 LT |
110 | |
111 | ACPI_FUNCTION_TRACE("acpi_system_read_fadt"); | |
112 | ||
113 | status = acpi_get_table(ACPI_TABLE_FADT, 1, &fadt); | |
114 | if (ACPI_FAILURE(status)) | |
115 | return_VALUE(-ENODEV); | |
116 | ||
117 | res = simple_read_from_buffer(buffer, count, ppos, | |
118 | fadt.pointer, fadt.length); | |
119 | acpi_os_free(fadt.pointer); | |
120 | ||
121 | return_VALUE(res); | |
122 | } | |
123 | ||
4be44fcd | 124 | static int __init acpi_system_init(void) |
1da177e4 | 125 | { |
4be44fcd | 126 | struct proc_dir_entry *entry; |
1da177e4 | 127 | int error = 0; |
4be44fcd | 128 | char *name; |
1da177e4 LT |
129 | |
130 | ACPI_FUNCTION_TRACE("acpi_system_init"); | |
131 | ||
132 | if (acpi_disabled) | |
133 | return_VALUE(0); | |
134 | ||
135 | /* 'info' [R] */ | |
136 | name = ACPI_SYSTEM_FILE_INFO; | |
4be44fcd | 137 | entry = create_proc_entry(name, S_IRUGO, acpi_root_dir); |
1da177e4 LT |
138 | if (!entry) |
139 | goto Error; | |
140 | else { | |
141 | entry->proc_fops = &acpi_system_info_ops; | |
142 | } | |
143 | ||
144 | /* 'dsdt' [R] */ | |
145 | name = ACPI_SYSTEM_FILE_DSDT; | |
146 | entry = create_proc_entry(name, S_IRUSR, acpi_root_dir); | |
147 | if (entry) | |
148 | entry->proc_fops = &acpi_system_dsdt_ops; | |
4be44fcd | 149 | else |
1da177e4 LT |
150 | goto Error; |
151 | ||
152 | /* 'fadt' [R] */ | |
153 | name = ACPI_SYSTEM_FILE_FADT; | |
154 | entry = create_proc_entry(name, S_IRUSR, acpi_root_dir); | |
155 | if (entry) | |
156 | entry->proc_fops = &acpi_system_fadt_ops; | |
157 | else | |
158 | goto Error; | |
159 | ||
4be44fcd | 160 | Done: |
1da177e4 LT |
161 | return_VALUE(error); |
162 | ||
4be44fcd LB |
163 | Error: |
164 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, | |
165 | "Unable to create '%s' proc fs entry\n", name)); | |
1da177e4 LT |
166 | |
167 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); | |
168 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); | |
169 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); | |
170 | ||
171 | error = -EFAULT; | |
172 | goto Done; | |
173 | } | |
174 | ||
1da177e4 | 175 | subsys_initcall(acpi_system_init); |