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Diffstat (limited to 'drivers/misc/sony-laptop.c')
-rw-r--r--drivers/misc/sony-laptop.c504
1 files changed, 504 insertions, 0 deletions
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
new file mode 100644
index 000000000000..103657e1b449
--- /dev/null
+++ b/drivers/misc/sony-laptop.c
@@ -0,0 +1,504 @@
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>
30#include <linux/backlight.h>
31#include <linux/err.h>
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"
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
43
44#define LOG_PFX KERN_WARNING "sony_acpi: "
45
46MODULE_AUTHOR("Stelian Pop");
47MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
48MODULE_LICENSE("GPL");
49
50static int debug;
51module_param(debug, int, 0);
52MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
53 "the development of this driver");
54
55static acpi_handle sony_acpi_handle;
56static struct proc_dir_entry *sony_acpi_dir;
57static struct acpi_device *sony_acpi_acpi_device = NULL;
58
59static int sony_backlight_update_status(struct backlight_device *bd);
60static int sony_backlight_get_brightness(struct backlight_device *bd);
61static struct backlight_device *sony_backlight_device;
62static 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
69static struct sony_acpi_value {
70 char *name; /* name of the entry */
71 struct proc_dir_entry *proc; /* /proc entry */
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 */
76 int value; /* current setting */
77 int valid; /* Has ever been set */
78 int debug; /* active only in debug mode ? */
79} sony_acpi_values[] = {
80 {
81 /* for backward compatibility only */
82 .name = "brightness",
83 .acpiget = "GBRT",
84 .acpiset = "SBRT",
85 .min = 1,
86 .max = SONY_MAX_BRIGHTNESS,
87 .debug = 0,
88 },
89 {
90 .name = "brightness_default",
91 .acpiget = "GPBR",
92 .acpiset = "SPBR",
93 .min = 1,
94 .max = SONY_MAX_BRIGHTNESS,
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",
106 .min = 0,
107 .max = 1,
108 .debug = 0,
109 },
110 {
111 .name = "cdpower",
112 .acpiget = "GCDP",
113 .acpiset = "CDPW",
114 .min = 0,
115 .max = 1,
116 .debug = 0,
117 },
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 },
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
168static 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
188static 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, &params, &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
223static 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
238static 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
253static 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;
273 item->value = value;
274 item->valid = 1;
275 return count;
276}
277
278static int sony_acpi_resume(struct acpi_device *device)
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
297static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
298{
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);
302}
303
304static 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
319static int sony_acpi_add(struct acpi_device *device)
320{
321 acpi_status status;
322 int result;
323 acpi_handle handle;
324 mode_t proc_file_mode;
325 struct sony_acpi_value *item;
326
327 sony_acpi_acpi_device = device;
328
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 }
342 }
343
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;
352 }
353
354 if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
355 sony_backlight_device = backlight_device_register("sony", NULL,
356 NULL, &sony_backlight_properties);
357
358 if (IS_ERR(sony_backlight_device)) {
359 printk(LOG_PFX "unable to register backlight device\n");
360 sony_backlight_device = NULL;
361 }
362 else
363 sony_backlight_properties.brightness =
364 sony_backlight_get_brightness(sony_backlight_device);
365 }
366
367 for (item = sony_acpi_values; item->name; ++item) {
368 proc_file_mode = 0;
369
370 if (!debug && item->debug)
371 continue;
372
373 if (item->acpiget) {
374 if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
375 item->acpiget, &handle)))
376 continue;
377
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 }
388
389 item->proc = create_proc_entry(item->name, proc_file_mode,
390 acpi_device_dir(device));
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
407outproc:
408 if (sony_backlight_device)
409 backlight_device_unregister(sony_backlight_device);
410
411 for (item = sony_acpi_values; item->name; ++item)
412 if (item->proc)
413 remove_proc_entry(item->name, acpi_device_dir(device));
414outnotify:
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");
420outwalk:
421 return result;
422}
423
424static int sony_acpi_remove(struct acpi_device *device, int type)
425{
426 acpi_status status;
427 struct sony_acpi_value *item;
428
429 if (sony_backlight_device)
430 backlight_device_unregister(sony_backlight_device);
431
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");
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
449static 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
456static 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
466static 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
477static 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
497static 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
503module_init(sony_acpi_init);
504module_exit(sony_acpi_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 20:23:18 -0500