Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acpi_fan.c - ACPI Fan Driver ($Revision: 29 $) | |
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/kernel.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
30 | #include <linux/proc_fs.h> | |
31 | #include <linux/seq_file.h> | |
32 | #include <asm/uaccess.h> | |
33 | ||
34 | #include <acpi/acpi_bus.h> | |
35 | #include <acpi/acpi_drivers.h> | |
36 | ||
1da177e4 LT |
37 | #define ACPI_FAN_COMPONENT 0x00200000 |
38 | #define ACPI_FAN_CLASS "fan" | |
1da177e4 | 39 | #define ACPI_FAN_FILE_STATE "state" |
1da177e4 LT |
40 | |
41 | #define _COMPONENT ACPI_FAN_COMPONENT | |
f52fd66d | 42 | ACPI_MODULE_NAME("fan"); |
1da177e4 | 43 | |
f52fd66d | 44 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 45 | MODULE_DESCRIPTION("ACPI Fan Driver"); |
1da177e4 LT |
46 | MODULE_LICENSE("GPL"); |
47 | ||
4be44fcd LB |
48 | static int acpi_fan_add(struct acpi_device *device); |
49 | static int acpi_fan_remove(struct acpi_device *device, int type); | |
1da177e4 | 50 | |
1ba90e3a TR |
51 | static const struct acpi_device_id fan_device_ids[] = { |
52 | {"PNP0C0B", 0}, | |
53 | {"", 0}, | |
54 | }; | |
55 | MODULE_DEVICE_TABLE(acpi, fan_device_ids); | |
56 | ||
1da177e4 | 57 | static struct acpi_driver acpi_fan_driver = { |
c2b6705b | 58 | .name = "fan", |
4be44fcd | 59 | .class = ACPI_FAN_CLASS, |
1ba90e3a | 60 | .ids = fan_device_ids, |
4be44fcd LB |
61 | .ops = { |
62 | .add = acpi_fan_add, | |
63 | .remove = acpi_fan_remove, | |
64 | }, | |
1da177e4 LT |
65 | }; |
66 | ||
1da177e4 LT |
67 | /* -------------------------------------------------------------------------- |
68 | FS Interface (/proc) | |
69 | -------------------------------------------------------------------------- */ | |
70 | ||
4be44fcd | 71 | static struct proc_dir_entry *acpi_fan_dir; |
1da177e4 | 72 | |
4be44fcd | 73 | static int acpi_fan_read_state(struct seq_file *seq, void *offset) |
1da177e4 | 74 | { |
968fc5dc | 75 | struct acpi_device *device = seq->private; |
4be44fcd | 76 | int state = 0; |
1da177e4 | 77 | |
1da177e4 | 78 | |
968fc5dc AS |
79 | if (device) { |
80 | if (acpi_bus_get_power(device->handle, &state)) | |
1da177e4 LT |
81 | seq_printf(seq, "status: ERROR\n"); |
82 | else | |
83 | seq_printf(seq, "status: %s\n", | |
4be44fcd | 84 | !state ? "on" : "off"); |
1da177e4 | 85 | } |
d550d98d | 86 | return 0; |
1da177e4 LT |
87 | } |
88 | ||
89 | static int acpi_fan_state_open_fs(struct inode *inode, struct file *file) | |
90 | { | |
91 | return single_open(file, acpi_fan_read_state, PDE(inode)->data); | |
92 | } | |
93 | ||
94 | static ssize_t | |
4be44fcd LB |
95 | acpi_fan_write_state(struct file *file, const char __user * buffer, |
96 | size_t count, loff_t * ppos) | |
1da177e4 | 97 | { |
4be44fcd | 98 | int result = 0; |
50dd0969 | 99 | struct seq_file *m = file->private_data; |
968fc5dc | 100 | struct acpi_device *device = m->private; |
4be44fcd | 101 | char state_string[12] = { '\0' }; |
1da177e4 | 102 | |
968fc5dc | 103 | if (count > sizeof(state_string) - 1) |
d550d98d | 104 | return -EINVAL; |
4be44fcd | 105 | |
1da177e4 | 106 | if (copy_from_user(state_string, buffer, count)) |
d550d98d | 107 | return -EFAULT; |
4be44fcd | 108 | |
1da177e4 | 109 | state_string[count] = '\0'; |
4be44fcd | 110 | |
968fc5dc | 111 | result = acpi_bus_set_power(device->handle, |
4be44fcd | 112 | simple_strtoul(state_string, NULL, 0)); |
1da177e4 | 113 | if (result) |
d550d98d | 114 | return result; |
1da177e4 | 115 | |
d550d98d | 116 | return count; |
1da177e4 LT |
117 | } |
118 | ||
d7508032 | 119 | static const struct file_operations acpi_fan_state_ops = { |
4be44fcd LB |
120 | .open = acpi_fan_state_open_fs, |
121 | .read = seq_read, | |
122 | .write = acpi_fan_write_state, | |
123 | .llseek = seq_lseek, | |
124 | .release = single_release, | |
1da177e4 LT |
125 | .owner = THIS_MODULE, |
126 | }; | |
127 | ||
4be44fcd | 128 | static int acpi_fan_add_fs(struct acpi_device *device) |
1da177e4 | 129 | { |
4be44fcd | 130 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 131 | |
1da177e4 LT |
132 | |
133 | if (!device) | |
d550d98d | 134 | return -EINVAL; |
1da177e4 LT |
135 | |
136 | if (!acpi_device_dir(device)) { | |
137 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 138 | acpi_fan_dir); |
1da177e4 | 139 | if (!acpi_device_dir(device)) |
d550d98d | 140 | return -ENODEV; |
1da177e4 LT |
141 | acpi_device_dir(device)->owner = THIS_MODULE; |
142 | } | |
143 | ||
144 | /* 'status' [R/W] */ | |
145 | entry = create_proc_entry(ACPI_FAN_FILE_STATE, | |
4be44fcd LB |
146 | S_IFREG | S_IRUGO | S_IWUSR, |
147 | acpi_device_dir(device)); | |
1da177e4 | 148 | if (!entry) |
d550d98d | 149 | return -ENODEV; |
1da177e4 LT |
150 | else { |
151 | entry->proc_fops = &acpi_fan_state_ops; | |
968fc5dc | 152 | entry->data = device; |
1da177e4 LT |
153 | entry->owner = THIS_MODULE; |
154 | } | |
155 | ||
d550d98d | 156 | return 0; |
1da177e4 LT |
157 | } |
158 | ||
4be44fcd | 159 | static int acpi_fan_remove_fs(struct acpi_device *device) |
1da177e4 | 160 | { |
1da177e4 LT |
161 | |
162 | if (acpi_device_dir(device)) { | |
4be44fcd | 163 | remove_proc_entry(ACPI_FAN_FILE_STATE, acpi_device_dir(device)); |
1da177e4 LT |
164 | remove_proc_entry(acpi_device_bid(device), acpi_fan_dir); |
165 | acpi_device_dir(device) = NULL; | |
166 | } | |
167 | ||
d550d98d | 168 | return 0; |
1da177e4 LT |
169 | } |
170 | ||
1da177e4 LT |
171 | /* -------------------------------------------------------------------------- |
172 | Driver Interface | |
173 | -------------------------------------------------------------------------- */ | |
174 | ||
4be44fcd | 175 | static int acpi_fan_add(struct acpi_device *device) |
1da177e4 | 176 | { |
4be44fcd LB |
177 | int result = 0; |
178 | struct acpi_fan *fan = NULL; | |
179 | int state = 0; | |
1da177e4 | 180 | |
1da177e4 LT |
181 | |
182 | if (!device) | |
d550d98d | 183 | return -EINVAL; |
1da177e4 | 184 | |
c65ade4d | 185 | strcpy(acpi_device_name(device), "Fan"); |
1da177e4 | 186 | strcpy(acpi_device_class(device), ACPI_FAN_CLASS); |
1da177e4 | 187 | |
dc8c2b27 | 188 | result = acpi_bus_get_power(device->handle, &state); |
1da177e4 | 189 | if (result) { |
6468463a | 190 | printk(KERN_ERR PREFIX "Reading power state\n"); |
1da177e4 LT |
191 | goto end; |
192 | } | |
193 | ||
194 | result = acpi_fan_add_fs(device); | |
195 | if (result) | |
196 | goto end; | |
197 | ||
198 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", | |
4be44fcd LB |
199 | acpi_device_name(device), acpi_device_bid(device), |
200 | !device->power.state ? "on" : "off"); | |
1da177e4 | 201 | |
4be44fcd | 202 | end: |
1da177e4 LT |
203 | if (result) |
204 | kfree(fan); | |
205 | ||
d550d98d | 206 | return result; |
1da177e4 LT |
207 | } |
208 | ||
4be44fcd | 209 | static int acpi_fan_remove(struct acpi_device *device, int type) |
1da177e4 | 210 | { |
1da177e4 | 211 | if (!device || !acpi_driver_data(device)) |
d550d98d | 212 | return -EINVAL; |
1da177e4 | 213 | |
1da177e4 LT |
214 | acpi_fan_remove_fs(device); |
215 | ||
d550d98d | 216 | return 0; |
1da177e4 LT |
217 | } |
218 | ||
4be44fcd | 219 | static int __init acpi_fan_init(void) |
1da177e4 | 220 | { |
c65ade4d | 221 | int result = 0; |
1da177e4 | 222 | |
1da177e4 LT |
223 | |
224 | acpi_fan_dir = proc_mkdir(ACPI_FAN_CLASS, acpi_root_dir); | |
225 | if (!acpi_fan_dir) | |
d550d98d | 226 | return -ENODEV; |
1da177e4 LT |
227 | acpi_fan_dir->owner = THIS_MODULE; |
228 | ||
229 | result = acpi_bus_register_driver(&acpi_fan_driver); | |
230 | if (result < 0) { | |
231 | remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir); | |
d550d98d | 232 | return -ENODEV; |
1da177e4 LT |
233 | } |
234 | ||
d550d98d | 235 | return 0; |
1da177e4 LT |
236 | } |
237 | ||
4be44fcd | 238 | static void __exit acpi_fan_exit(void) |
1da177e4 | 239 | { |
1da177e4 LT |
240 | |
241 | acpi_bus_unregister_driver(&acpi_fan_driver); | |
242 | ||
243 | remove_proc_entry(ACPI_FAN_CLASS, acpi_root_dir); | |
244 | ||
d550d98d | 245 | return; |
1da177e4 LT |
246 | } |
247 | ||
1da177e4 LT |
248 | module_init(acpi_fan_init); |
249 | module_exit(acpi_fan_exit); |