Commit | Line | Data |
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7f09c432 SP |
1 | /* |
2 | * ACPI Sony Notebook Control Driver (SNC) | |
3 | * | |
4 | * Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net> | |
5 | * | |
6 | * Parts of this driver inspired from asus_acpi.c and ibm_acpi.c | |
7 | * which are copyrighted by their respective authors. | |
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 | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | */ | |
24 | ||
25 | #include <linux/kernel.h> | |
26 | #include <linux/module.h> | |
27 | #include <linux/moduleparam.h> | |
28 | #include <linux/init.h> | |
29 | #include <linux/types.h> | |
50f62afb AG |
30 | #include <linux/backlight.h> |
31 | #include <linux/err.h> | |
7f09c432 SP |
32 | #include <acpi/acpi_drivers.h> |
33 | #include <acpi/acpi_bus.h> | |
34 | #include <asm/uaccess.h> | |
35 | ||
36 | #define ACPI_SNC_CLASS "sony" | |
37 | #define ACPI_SNC_HID "SNY5001" | |
50f62afb AG |
38 | #define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.3" |
39 | ||
40 | /* the device uses 1-based values, while the backlight subsystem uses | |
41 | 0-based values */ | |
42 | #define SONY_MAX_BRIGHTNESS 8 | |
7f09c432 SP |
43 | |
44 | #define LOG_PFX KERN_WARNING "sony_acpi: " | |
45 | ||
46 | MODULE_AUTHOR("Stelian Pop"); | |
47 | MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
50 | static int debug; | |
51 | module_param(debug, int, 0); | |
52 | MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help " | |
53 | "the development of this driver"); | |
54 | ||
7f09c432 SP |
55 | static acpi_handle sony_acpi_handle; |
56 | static struct proc_dir_entry *sony_acpi_dir; | |
c561162f | 57 | static struct acpi_device *sony_acpi_acpi_device = NULL; |
7f09c432 | 58 | |
50f62afb AG |
59 | static int sony_backlight_update_status(struct backlight_device *bd); |
60 | static int sony_backlight_get_brightness(struct backlight_device *bd); | |
61 | static struct backlight_device *sony_backlight_device; | |
62 | static struct backlight_properties sony_backlight_properties = { | |
63 | .owner = THIS_MODULE, | |
64 | .update_status = sony_backlight_update_status, | |
65 | .get_brightness = sony_backlight_get_brightness, | |
66 | .max_brightness = SONY_MAX_BRIGHTNESS - 1, | |
67 | }; | |
68 | ||
7f09c432 SP |
69 | static struct sony_acpi_value { |
70 | char *name; /* name of the entry */ | |
57ede701 | 71 | struct proc_dir_entry *proc; /* /proc entry */ |
7f09c432 SP |
72 | char *acpiget;/* name of the ACPI get function */ |
73 | char *acpiset;/* name of the ACPI get function */ | |
74 | int min; /* minimum allowed value or -1 */ | |
75 | int max; /* maximum allowed value or -1 */ | |
3f4f461f AM |
76 | int value; /* current setting */ |
77 | int valid; /* Has ever been set */ | |
7f09c432 SP |
78 | int debug; /* active only in debug mode ? */ |
79 | } sony_acpi_values[] = { | |
243e8b19 | 80 | { |
57ede701 | 81 | /* for backward compatibility only */ |
243e8b19 AG |
82 | .name = "brightness", |
83 | .acpiget = "GBRT", | |
84 | .acpiset = "SBRT", | |
85 | .min = 1, | |
86 | .max = SONY_MAX_BRIGHTNESS, | |
87 | .debug = 0, | |
88 | }, | |
7f09c432 SP |
89 | { |
90 | .name = "brightness_default", | |
91 | .acpiget = "GPBR", | |
92 | .acpiset = "SPBR", | |
93 | .min = 1, | |
50f62afb | 94 | .max = SONY_MAX_BRIGHTNESS, |
7f09c432 SP |
95 | .debug = 0, |
96 | }, | |
97 | { | |
98 | .name = "fnkey", | |
99 | .acpiget = "GHKE", | |
100 | .debug = 0, | |
101 | }, | |
102 | { | |
103 | .name = "cdpower", | |
104 | .acpiget = "GCDP", | |
105 | .acpiset = "SCDP", | |
4465857d MD |
106 | .min = 0, |
107 | .max = 1, | |
7f09c432 SP |
108 | .debug = 0, |
109 | }, | |
57ede701 MD |
110 | { |
111 | .name = "cdpower", | |
112 | .acpiget = "GCDP", | |
113 | .acpiset = "CDPW", | |
114 | .min = 0, | |
115 | .max = 1, | |
116 | .debug = 0, | |
117 | }, | |
4465857d MD |
118 | { |
119 | .name = "audiopower", | |
120 | .acpiget = "GAZP", | |
121 | .acpiset = "AZPW", | |
122 | .min = 0, | |
123 | .max = 1, | |
124 | .debug = 0, | |
125 | }, | |
126 | { | |
127 | .name = "lanpower", | |
128 | .acpiget = "GLNP", | |
129 | .acpiset = "LNPW", | |
130 | .min = 0, | |
131 | .max = 1, | |
132 | .debug = 1, | |
133 | }, | |
7f09c432 SP |
134 | { |
135 | .name = "PID", | |
136 | .acpiget = "GPID", | |
137 | .debug = 1, | |
138 | }, | |
139 | { | |
140 | .name = "CTR", | |
141 | .acpiget = "GCTR", | |
142 | .acpiset = "SCTR", | |
143 | .min = -1, | |
144 | .max = -1, | |
145 | .debug = 1, | |
146 | }, | |
147 | { | |
148 | .name = "PCR", | |
149 | .acpiget = "GPCR", | |
150 | .acpiset = "SPCR", | |
151 | .min = -1, | |
152 | .max = -1, | |
153 | .debug = 1, | |
154 | }, | |
155 | { | |
156 | .name = "CMI", | |
157 | .acpiget = "GCMI", | |
158 | .acpiset = "SCMI", | |
159 | .min = -1, | |
160 | .max = -1, | |
161 | .debug = 1, | |
162 | }, | |
163 | { | |
164 | .name = NULL, | |
165 | } | |
166 | }; | |
167 | ||
168 | static int acpi_callgetfunc(acpi_handle handle, char *name, int *result) | |
169 | { | |
170 | struct acpi_buffer output; | |
171 | union acpi_object out_obj; | |
172 | acpi_status status; | |
173 | ||
174 | output.length = sizeof(out_obj); | |
175 | output.pointer = &out_obj; | |
176 | ||
177 | status = acpi_evaluate_object(handle, name, NULL, &output); | |
178 | if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) { | |
179 | *result = out_obj.integer.value; | |
180 | return 0; | |
181 | } | |
182 | ||
183 | printk(LOG_PFX "acpi_callreadfunc failed\n"); | |
184 | ||
185 | return -1; | |
186 | } | |
187 | ||
188 | static int acpi_callsetfunc(acpi_handle handle, char *name, int value, | |
189 | int *result) | |
190 | { | |
191 | struct acpi_object_list params; | |
192 | union acpi_object in_obj; | |
193 | struct acpi_buffer output; | |
194 | union acpi_object out_obj; | |
195 | acpi_status status; | |
196 | ||
197 | params.count = 1; | |
198 | params.pointer = &in_obj; | |
199 | in_obj.type = ACPI_TYPE_INTEGER; | |
200 | in_obj.integer.value = value; | |
201 | ||
202 | output.length = sizeof(out_obj); | |
203 | output.pointer = &out_obj; | |
204 | ||
205 | status = acpi_evaluate_object(handle, name, ¶ms, &output); | |
206 | if (status == AE_OK) { | |
207 | if (result != NULL) { | |
208 | if (out_obj.type != ACPI_TYPE_INTEGER) { | |
209 | printk(LOG_PFX "acpi_evaluate_object bad " | |
210 | "return type\n"); | |
211 | return -1; | |
212 | } | |
213 | *result = out_obj.integer.value; | |
214 | } | |
215 | return 0; | |
216 | } | |
217 | ||
218 | printk(LOG_PFX "acpi_evaluate_object failed\n"); | |
219 | ||
220 | return -1; | |
221 | } | |
222 | ||
223 | static int parse_buffer(const char __user *buffer, unsigned long count, | |
224 | int *val) { | |
225 | char s[32]; | |
226 | int ret; | |
227 | ||
228 | if (count > 31) | |
229 | return -EINVAL; | |
230 | if (copy_from_user(s, buffer, count)) | |
231 | return -EFAULT; | |
232 | s[count] = '\0'; | |
233 | ret = simple_strtoul(s, NULL, 10); | |
234 | *val = ret; | |
235 | return 0; | |
236 | } | |
237 | ||
238 | static int sony_acpi_read(char* page, char** start, off_t off, int count, | |
239 | int* eof, void *data) | |
240 | { | |
241 | struct sony_acpi_value *item = data; | |
242 | int value; | |
243 | ||
244 | if (!item->acpiget) | |
245 | return -EIO; | |
246 | ||
247 | if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0) | |
248 | return -EIO; | |
249 | ||
250 | return sprintf(page, "%d\n", value); | |
251 | } | |
252 | ||
253 | static int sony_acpi_write(struct file *file, const char __user *buffer, | |
254 | unsigned long count, void *data) | |
255 | { | |
256 | struct sony_acpi_value *item = data; | |
257 | int result; | |
258 | int value; | |
259 | ||
260 | if (!item->acpiset) | |
261 | return -EIO; | |
262 | ||
263 | if ((result = parse_buffer(buffer, count, &value)) < 0) | |
264 | return result; | |
265 | ||
266 | if (item->min != -1 && value < item->min) | |
267 | return -EINVAL; | |
268 | if (item->max != -1 && value > item->max) | |
269 | return -EINVAL; | |
270 | ||
271 | if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0) | |
272 | return -EIO; | |
3f4f461f AM |
273 | item->value = value; |
274 | item->valid = 1; | |
7f09c432 SP |
275 | return count; |
276 | } | |
277 | ||
fac35061 | 278 | static int sony_acpi_resume(struct acpi_device *device) |
3f4f461f AM |
279 | { |
280 | struct sony_acpi_value *item; | |
281 | ||
282 | for (item = sony_acpi_values; item->name; item++) { | |
283 | int ret; | |
284 | ||
285 | if (!item->valid) | |
286 | continue; | |
287 | ret = acpi_callsetfunc(sony_acpi_handle, item->acpiset, | |
288 | item->value, NULL); | |
289 | if (ret < 0) { | |
290 | printk("%s: %d\n", __FUNCTION__, ret); | |
291 | break; | |
292 | } | |
293 | } | |
294 | return 0; | |
295 | } | |
296 | ||
7f09c432 SP |
297 | static void sony_acpi_notify(acpi_handle handle, u32 event, void *data) |
298 | { | |
c561162f SP |
299 | if (debug) |
300 | printk(LOG_PFX "sony_acpi_notify, event: %d\n", event); | |
301 | acpi_bus_generate_event(sony_acpi_acpi_device, 1, event); | |
7f09c432 SP |
302 | } |
303 | ||
304 | static acpi_status sony_walk_callback(acpi_handle handle, u32 level, | |
305 | void *context, void **return_value) | |
306 | { | |
307 | struct acpi_namespace_node *node; | |
308 | union acpi_operand_object *operand; | |
309 | ||
310 | node = (struct acpi_namespace_node *) handle; | |
311 | operand = (union acpi_operand_object *) node->object; | |
312 | ||
313 | printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii, | |
314 | (u32) operand->method.param_count); | |
315 | ||
316 | return AE_OK; | |
317 | } | |
318 | ||
319 | static int sony_acpi_add(struct acpi_device *device) | |
320 | { | |
321 | acpi_status status; | |
322 | int result; | |
50f62afb | 323 | acpi_handle handle; |
05e2d827 | 324 | mode_t proc_file_mode; |
7f09c432 SP |
325 | struct sony_acpi_value *item; |
326 | ||
c561162f SP |
327 | sony_acpi_acpi_device = device; |
328 | ||
7f09c432 SP |
329 | sony_acpi_handle = device->handle; |
330 | ||
331 | acpi_driver_data(device) = NULL; | |
332 | acpi_device_dir(device) = sony_acpi_dir; | |
333 | ||
334 | if (debug) { | |
335 | status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle, | |
336 | 1, sony_walk_callback, NULL, NULL); | |
337 | if (ACPI_FAILURE(status)) { | |
338 | printk(LOG_PFX "unable to walk acpi resources\n"); | |
339 | result = -ENODEV; | |
340 | goto outwalk; | |
341 | } | |
c561162f | 342 | } |
7f09c432 | 343 | |
c561162f SP |
344 | status = acpi_install_notify_handler(sony_acpi_handle, |
345 | ACPI_DEVICE_NOTIFY, | |
346 | sony_acpi_notify, | |
347 | NULL); | |
348 | if (ACPI_FAILURE(status)) { | |
349 | printk(LOG_PFX "unable to install notify handler\n"); | |
350 | result = -ENODEV; | |
351 | goto outnotify; | |
7f09c432 SP |
352 | } |
353 | ||
50f62afb AG |
354 | if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) { |
355 | sony_backlight_device = backlight_device_register("sony", NULL, | |
82c47731 | 356 | NULL, &sony_backlight_properties); |
7df03b82 | 357 | |
50f62afb AG |
358 | if (IS_ERR(sony_backlight_device)) { |
359 | printk(LOG_PFX "unable to register backlight device\n"); | |
7df03b82 | 360 | sony_backlight_device = NULL; |
50f62afb | 361 | } |
7df03b82 MD |
362 | else |
363 | sony_backlight_properties.brightness = | |
364 | sony_backlight_get_brightness(sony_backlight_device); | |
50f62afb | 365 | } |
7f09c432 | 366 | |
50f62afb | 367 | for (item = sony_acpi_values; item->name; ++item) { |
05e2d827 MD |
368 | proc_file_mode = 0; |
369 | ||
7f09c432 SP |
370 | if (!debug && item->debug) |
371 | continue; | |
372 | ||
57ede701 MD |
373 | if (item->acpiget) { |
374 | if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle, | |
375 | item->acpiget, &handle))) | |
376 | continue; | |
05e2d827 | 377 | |
57ede701 MD |
378 | proc_file_mode |= S_IRUSR; |
379 | } | |
380 | ||
381 | if (item->acpiset) { | |
382 | if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle, | |
383 | item->acpiset, &handle))) | |
384 | continue; | |
385 | ||
386 | proc_file_mode |= S_IWUSR; | |
387 | } | |
7f09c432 | 388 | |
05e2d827 | 389 | item->proc = create_proc_entry(item->name, proc_file_mode, |
57ede701 | 390 | acpi_device_dir(device)); |
7f09c432 SP |
391 | if (!item->proc) { |
392 | printk(LOG_PFX "unable to create proc entry\n"); | |
393 | result = -EIO; | |
394 | goto outproc; | |
395 | } | |
396 | ||
397 | item->proc->read_proc = sony_acpi_read; | |
398 | item->proc->write_proc = sony_acpi_write; | |
399 | item->proc->data = item; | |
400 | item->proc->owner = THIS_MODULE; | |
401 | } | |
402 | ||
403 | printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n"); | |
404 | ||
405 | return 0; | |
406 | ||
407 | outproc: | |
7df03b82 MD |
408 | if (sony_backlight_device) |
409 | backlight_device_unregister(sony_backlight_device); | |
410 | ||
05e2d827 MD |
411 | for (item = sony_acpi_values; item->name; ++item) |
412 | if (item->proc) | |
413 | remove_proc_entry(item->name, acpi_device_dir(device)); | |
414 | outnotify: | |
c561162f SP |
415 | status = acpi_remove_notify_handler(sony_acpi_handle, |
416 | ACPI_DEVICE_NOTIFY, | |
417 | sony_acpi_notify); | |
418 | if (ACPI_FAILURE(status)) | |
419 | printk(LOG_PFX "unable to remove notify handler\n"); | |
7f09c432 SP |
420 | outwalk: |
421 | return result; | |
422 | } | |
423 | ||
7f09c432 SP |
424 | static int sony_acpi_remove(struct acpi_device *device, int type) |
425 | { | |
426 | acpi_status status; | |
427 | struct sony_acpi_value *item; | |
428 | ||
50f62afb AG |
429 | if (sony_backlight_device) |
430 | backlight_device_unregister(sony_backlight_device); | |
431 | ||
c561162f SP |
432 | sony_acpi_acpi_device = NULL; |
433 | ||
434 | status = acpi_remove_notify_handler(sony_acpi_handle, | |
435 | ACPI_DEVICE_NOTIFY, | |
436 | sony_acpi_notify); | |
437 | if (ACPI_FAILURE(status)) | |
438 | printk(LOG_PFX "unable to remove notify handler\n"); | |
7f09c432 SP |
439 | |
440 | for (item = sony_acpi_values; item->name; ++item) | |
441 | if (item->proc) | |
442 | remove_proc_entry(item->name, acpi_device_dir(device)); | |
443 | ||
444 | printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n"); | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
50f62afb AG |
449 | static int sony_backlight_update_status(struct backlight_device *bd) |
450 | { | |
451 | return acpi_callsetfunc(sony_acpi_handle, "SBRT", | |
452 | bd->props->brightness + 1, | |
453 | NULL); | |
454 | } | |
455 | ||
456 | static int sony_backlight_get_brightness(struct backlight_device *bd) | |
457 | { | |
458 | int value; | |
459 | ||
460 | if (acpi_callgetfunc(sony_acpi_handle, "GBRT", &value)) | |
461 | return 0; | |
462 | /* brightness levels are 1-based, while backlight ones are 0-based */ | |
463 | return value - 1; | |
464 | } | |
465 | ||
3f4f461f AM |
466 | static struct acpi_driver sony_acpi_driver = { |
467 | .name = ACPI_SNC_DRIVER_NAME, | |
468 | .class = ACPI_SNC_CLASS, | |
469 | .ids = ACPI_SNC_HID, | |
470 | .ops = { | |
471 | .add = sony_acpi_add, | |
472 | .remove = sony_acpi_remove, | |
473 | .resume = sony_acpi_resume, | |
474 | }, | |
475 | }; | |
476 | ||
7f09c432 SP |
477 | static int __init sony_acpi_init(void) |
478 | { | |
479 | int result; | |
480 | ||
481 | sony_acpi_dir = proc_mkdir("sony", acpi_root_dir); | |
482 | if (!sony_acpi_dir) { | |
483 | printk(LOG_PFX "unable to create /proc entry\n"); | |
484 | return -ENODEV; | |
485 | } | |
486 | sony_acpi_dir->owner = THIS_MODULE; | |
487 | ||
488 | result = acpi_bus_register_driver(&sony_acpi_driver); | |
489 | if (result < 0) { | |
490 | remove_proc_entry("sony", acpi_root_dir); | |
491 | return -ENODEV; | |
492 | } | |
493 | return 0; | |
494 | } | |
495 | ||
496 | ||
497 | static void __exit sony_acpi_exit(void) | |
498 | { | |
499 | acpi_bus_unregister_driver(&sony_acpi_driver); | |
500 | remove_proc_entry("sony", acpi_root_dir); | |
501 | } | |
502 | ||
503 | module_init(sony_acpi_init); | |
504 | module_exit(sony_acpi_exit); |