Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_ac.c - ACPI AC Adapter Driver ($Revision: 27 $) |
| 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 <acpi/acpi_bus.h> |
| 33 | #include <acpi/acpi_drivers.h> |
| 34 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define ACPI_AC_COMPONENT 0x00020000 |
| 36 | #define ACPI_AC_CLASS "ac_adapter" |
| 37 | #define ACPI_AC_HID "ACPI0003" |
| 38 | #define ACPI_AC_DRIVER_NAME "ACPI AC Adapter Driver" |
| 39 | #define ACPI_AC_DEVICE_NAME "AC Adapter" |
| 40 | #define ACPI_AC_FILE_STATE "state" |
| 41 | #define ACPI_AC_NOTIFY_STATUS 0x80 |
| 42 | #define ACPI_AC_STATUS_OFFLINE 0x00 |
| 43 | #define ACPI_AC_STATUS_ONLINE 0x01 |
| 44 | #define ACPI_AC_STATUS_UNKNOWN 0xFF |
| 45 | |
| 46 | #define _COMPONENT ACPI_AC_COMPONENT |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 47 | ACPI_MODULE_NAME("acpi_ac") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 49 | MODULE_AUTHOR("Paul Diefenbaugh"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | MODULE_DESCRIPTION(ACPI_AC_DRIVER_NAME); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 53 | static int acpi_ac_add(struct acpi_device *device); |
| 54 | static int acpi_ac_remove(struct acpi_device *device, int type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | static int acpi_ac_open_fs(struct inode *inode, struct file *file); |
| 56 | |
| 57 | static struct acpi_driver acpi_ac_driver = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 58 | .name = ACPI_AC_DRIVER_NAME, |
| 59 | .class = ACPI_AC_CLASS, |
| 60 | .ids = ACPI_AC_HID, |
| 61 | .ops = { |
| 62 | .add = acpi_ac_add, |
| 63 | .remove = acpi_ac_remove, |
| 64 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | struct acpi_ac { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 68 | acpi_handle handle; |
| 69 | unsigned long state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | }; |
| 71 | |
| 72 | static struct file_operations acpi_ac_fops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 73 | .open = acpi_ac_open_fs, |
| 74 | .read = seq_read, |
| 75 | .llseek = seq_lseek, |
| 76 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | }; |
| 78 | |
| 79 | /* -------------------------------------------------------------------------- |
| 80 | AC Adapter Management |
| 81 | -------------------------------------------------------------------------- */ |
| 82 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 83 | static int acpi_ac_get_state(struct acpi_ac *ac) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 85 | acpi_status status = AE_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
| 87 | ACPI_FUNCTION_TRACE("acpi_ac_get_state"); |
| 88 | |
| 89 | if (!ac) |
| 90 | return_VALUE(-EINVAL); |
| 91 | |
| 92 | status = acpi_evaluate_integer(ac->handle, "_PSR", NULL, &ac->state); |
| 93 | if (ACPI_FAILURE(status)) { |
| 94 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 95 | "Error reading AC Adapter state\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | ac->state = ACPI_AC_STATUS_UNKNOWN; |
| 97 | return_VALUE(-ENODEV); |
| 98 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 99 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | return_VALUE(0); |
| 101 | } |
| 102 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | /* -------------------------------------------------------------------------- |
| 104 | FS Interface (/proc) |
| 105 | -------------------------------------------------------------------------- */ |
| 106 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 107 | static struct proc_dir_entry *acpi_ac_dir; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
| 109 | static int acpi_ac_seq_show(struct seq_file *seq, void *offset) |
| 110 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 111 | struct acpi_ac *ac = (struct acpi_ac *)seq->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
| 113 | ACPI_FUNCTION_TRACE("acpi_ac_seq_show"); |
| 114 | |
| 115 | if (!ac) |
| 116 | return_VALUE(0); |
| 117 | |
| 118 | if (acpi_ac_get_state(ac)) { |
| 119 | seq_puts(seq, "ERROR: Unable to read AC Adapter state\n"); |
| 120 | return_VALUE(0); |
| 121 | } |
| 122 | |
| 123 | seq_puts(seq, "state: "); |
| 124 | switch (ac->state) { |
| 125 | case ACPI_AC_STATUS_OFFLINE: |
| 126 | seq_puts(seq, "off-line\n"); |
| 127 | break; |
| 128 | case ACPI_AC_STATUS_ONLINE: |
| 129 | seq_puts(seq, "on-line\n"); |
| 130 | break; |
| 131 | default: |
| 132 | seq_puts(seq, "unknown\n"); |
| 133 | break; |
| 134 | } |
| 135 | |
| 136 | return_VALUE(0); |
| 137 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 138 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | static int acpi_ac_open_fs(struct inode *inode, struct file *file) |
| 140 | { |
| 141 | return single_open(file, acpi_ac_seq_show, PDE(inode)->data); |
| 142 | } |
| 143 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 144 | static int acpi_ac_add_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 146 | struct proc_dir_entry *entry = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
| 148 | ACPI_FUNCTION_TRACE("acpi_ac_add_fs"); |
| 149 | |
| 150 | if (!acpi_device_dir(device)) { |
| 151 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 152 | acpi_ac_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | if (!acpi_device_dir(device)) |
| 154 | return_VALUE(-ENODEV); |
| 155 | acpi_device_dir(device)->owner = THIS_MODULE; |
| 156 | } |
| 157 | |
| 158 | /* 'state' [R] */ |
| 159 | entry = create_proc_entry(ACPI_AC_FILE_STATE, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 160 | S_IRUGO, acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | if (!entry) |
| 162 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 163 | "Unable to create '%s' fs entry\n", |
| 164 | ACPI_AC_FILE_STATE)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | else { |
| 166 | entry->proc_fops = &acpi_ac_fops; |
| 167 | entry->data = acpi_driver_data(device); |
| 168 | entry->owner = THIS_MODULE; |
| 169 | } |
| 170 | |
| 171 | return_VALUE(0); |
| 172 | } |
| 173 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 174 | static int acpi_ac_remove_fs(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | { |
| 176 | ACPI_FUNCTION_TRACE("acpi_ac_remove_fs"); |
| 177 | |
| 178 | if (acpi_device_dir(device)) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 179 | remove_proc_entry(ACPI_AC_FILE_STATE, acpi_device_dir(device)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | remove_proc_entry(acpi_device_bid(device), acpi_ac_dir); |
| 182 | acpi_device_dir(device) = NULL; |
| 183 | } |
| 184 | |
| 185 | return_VALUE(0); |
| 186 | } |
| 187 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | /* -------------------------------------------------------------------------- |
| 189 | Driver Model |
| 190 | -------------------------------------------------------------------------- */ |
| 191 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 192 | static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 194 | struct acpi_ac *ac = (struct acpi_ac *)data; |
| 195 | struct acpi_device *device = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | |
| 197 | ACPI_FUNCTION_TRACE("acpi_ac_notify"); |
| 198 | |
| 199 | if (!ac) |
| 200 | return_VOID; |
| 201 | |
| 202 | if (acpi_bus_get_device(ac->handle, &device)) |
| 203 | return_VOID; |
| 204 | |
| 205 | switch (event) { |
| 206 | case ACPI_AC_NOTIFY_STATUS: |
| 207 | acpi_ac_get_state(ac); |
| 208 | acpi_bus_generate_event(device, event, (u32) ac->state); |
| 209 | break; |
| 210 | default: |
| 211 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 212 | "Unsupported event [0x%x]\n", event)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | break; |
| 214 | } |
| 215 | |
| 216 | return_VOID; |
| 217 | } |
| 218 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 219 | static int acpi_ac_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 221 | int result = 0; |
| 222 | acpi_status status = AE_OK; |
| 223 | struct acpi_ac *ac = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
| 225 | ACPI_FUNCTION_TRACE("acpi_ac_add"); |
| 226 | |
| 227 | if (!device) |
| 228 | return_VALUE(-EINVAL); |
| 229 | |
| 230 | ac = kmalloc(sizeof(struct acpi_ac), GFP_KERNEL); |
| 231 | if (!ac) |
| 232 | return_VALUE(-ENOMEM); |
| 233 | memset(ac, 0, sizeof(struct acpi_ac)); |
| 234 | |
| 235 | ac->handle = device->handle; |
| 236 | strcpy(acpi_device_name(device), ACPI_AC_DEVICE_NAME); |
| 237 | strcpy(acpi_device_class(device), ACPI_AC_CLASS); |
| 238 | acpi_driver_data(device) = ac; |
| 239 | |
| 240 | result = acpi_ac_get_state(ac); |
| 241 | if (result) |
| 242 | goto end; |
| 243 | |
| 244 | result = acpi_ac_add_fs(device); |
| 245 | if (result) |
| 246 | goto end; |
| 247 | |
| 248 | status = acpi_install_notify_handler(ac->handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 249 | ACPI_DEVICE_NOTIFY, acpi_ac_notify, |
| 250 | ac); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (ACPI_FAILURE(status)) { |
| 252 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 253 | "Error installing notify handler\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | result = -ENODEV; |
| 255 | goto end; |
| 256 | } |
| 257 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 258 | printk(KERN_INFO PREFIX "%s [%s] (%s)\n", |
| 259 | acpi_device_name(device), acpi_device_bid(device), |
| 260 | ac->state ? "on-line" : "off-line"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 262 | end: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | if (result) { |
| 264 | acpi_ac_remove_fs(device); |
| 265 | kfree(ac); |
| 266 | } |
| 267 | |
| 268 | return_VALUE(result); |
| 269 | } |
| 270 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 271 | static int acpi_ac_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 273 | acpi_status status = AE_OK; |
| 274 | struct acpi_ac *ac = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | |
| 276 | ACPI_FUNCTION_TRACE("acpi_ac_remove"); |
| 277 | |
| 278 | if (!device || !acpi_driver_data(device)) |
| 279 | return_VALUE(-EINVAL); |
| 280 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 281 | ac = (struct acpi_ac *)acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | |
| 283 | status = acpi_remove_notify_handler(ac->handle, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 284 | ACPI_DEVICE_NOTIFY, acpi_ac_notify); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | if (ACPI_FAILURE(status)) |
| 286 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 287 | "Error removing notify handler\n")); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | |
| 289 | acpi_ac_remove_fs(device); |
| 290 | |
| 291 | kfree(ac); |
| 292 | |
| 293 | return_VALUE(0); |
| 294 | } |
| 295 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 296 | static int __init acpi_ac_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 298 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | |
| 300 | ACPI_FUNCTION_TRACE("acpi_ac_init"); |
| 301 | |
| 302 | acpi_ac_dir = proc_mkdir(ACPI_AC_CLASS, acpi_root_dir); |
| 303 | if (!acpi_ac_dir) |
| 304 | return_VALUE(-ENODEV); |
| 305 | acpi_ac_dir->owner = THIS_MODULE; |
| 306 | |
| 307 | result = acpi_bus_register_driver(&acpi_ac_driver); |
| 308 | if (result < 0) { |
| 309 | remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); |
| 310 | return_VALUE(-ENODEV); |
| 311 | } |
| 312 | |
| 313 | return_VALUE(0); |
| 314 | } |
| 315 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame^] | 316 | static void __exit acpi_ac_exit(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | { |
| 318 | ACPI_FUNCTION_TRACE("acpi_ac_exit"); |
| 319 | |
| 320 | acpi_bus_unregister_driver(&acpi_ac_driver); |
| 321 | |
| 322 | remove_proc_entry(ACPI_AC_CLASS, acpi_root_dir); |
| 323 | |
| 324 | return_VOID; |
| 325 | } |
| 326 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | module_init(acpi_ac_init); |
| 328 | module_exit(acpi_ac_exit); |