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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / platform / x86 / panasonic-laptop.c
blob3f870972247c4ac6b9103e8c1a86f7634b8ff051
1 /*
2 * Panasonic HotKey and LCD brightness control driver
3 * (C) 2004 Hiroshi Miura <miura@da-cha.org>
4 * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
5 * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
6 * (C) 2004 David Bronaugh <dbronaugh>
7 * (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
8 *
9 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * publicshed by the Free Software Foundation.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 *
24 *---------------------------------------------------------------------------
25 *
26 * ChangeLog:
27 * Sep.23, 2008 Harald Welte <laforge@gnumonks.org>
28 * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to
29 * drivers/misc/panasonic-laptop.c
30 *
31 * Jul.04, 2008 Harald Welte <laforge@gnumonks.org>
32 * -v0.94 replace /proc interface with device attributes
33 * support {set,get}keycode on th input device
34 *
35 * Jun.27, 2008 Harald Welte <laforge@gnumonks.org>
36 * -v0.92 merge with 2.6.26-rc6 input API changes
37 * remove broken <= 2.6.15 kernel support
38 * resolve all compiler warnings
39 * various coding style fixes (checkpatch.pl)
40 * add support for backlight api
41 * major code restructuring
42 *
43 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org>
44 * -v0.91 merge with 2.6.24-rc6 ACPI changes
45 *
46 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
47 * -v0.9 remove warning about section reference.
48 * remove acpi_os_free
49 * add /proc/acpi/pcc/brightness interface for HAL access
50 * merge dbronaugh's enhancement
51 * Aug.17, 2004 David Bronaugh (dbronaugh)
52 * - Added screen brightness setting interface
53 * Thanks to FreeBSD crew (acpi_panasonic.c)
54 * for the ideas I needed to accomplish it
55 *
56 * May.29, 2006 Hiroshi Miura <miura@da-cha.org>
57 * -v0.8.4 follow to change keyinput structure
58 * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
59 * Jacob Bower <jacob.bower@ic.ac.uk> and
60 * Hiroshi Yokota for providing solutions.
61 *
62 * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org>
63 * -v0.8.2 merge code of YOKOTA Hiroshi
64 * <yokota@netlab.is.tsukuba.ac.jp>.
65 * Add sticky key mode interface.
66 * Refactoring acpi_pcc_generate_keyinput().
67 *
68 * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org>
69 * -v0.8 Generate key input event on input subsystem.
70 * This is based on yet another driver written by
71 * Ryuta Nakanishi.
72 *
73 * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org>
74 * -v0.7 Change proc interface functions using seq_file
75 * facility as same as other ACPI drivers.
76 *
77 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
78 * -v0.6.4 Fix a silly error with status checking
79 *
80 * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org>
81 * -v0.6.3 replace read_acpi_int by standard function
82 * acpi_evaluate_integer
83 * some clean up and make smart copyright notice.
84 * fix return value of pcc_acpi_get_key()
85 * fix checking return value of acpi_bus_register_driver()
86 *
87 * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
88 * -v0.6.2 Add check on ACPI data (num_sifr)
89 * Coding style cleanups, better error messages/handling
90 * Fixed an off-by-one error in memory allocation
91 *
92 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
93 * -v0.6.1 Fix a silly error with status checking
94 *
95 * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
96 * - v0.6 Correct brightness controls to reflect reality
97 * based on information gleaned by Hiroshi Miura
98 * and discussions with Hiroshi Miura
99 *
100 * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org>
101 * - v0.5 support LCD brightness control
102 * based on the disclosed information by MEI.
103 *
104 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
105 * - v0.4 first post version
106 * add function to retrive SIFR
107 *
108 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
109 * - v0.3 get proper status of hotkey
110 *
111 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
112 * - v0.2 add HotKey handler
113 *
114 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
115 * - v0.1 start from toshiba_acpi driver written by John Belmonte
116 *
117 */
118
119 #include <linux/kernel.h>
120 #include <linux/module.h>
121 #include <linux/init.h>
122 #include <linux/types.h>
123 #include <linux/backlight.h>
124 #include <linux/ctype.h>
125 #include <linux/seq_file.h>
126 #include <linux/uaccess.h>
127 #include <linux/slab.h>
128 #include <linux/acpi.h>
129 #include <linux/input.h>
130 #include <linux/input/sparse-keymap.h>
131
132 #ifndef ACPI_HOTKEY_COMPONENT
133 #define ACPI_HOTKEY_COMPONENT 0x10000000
134 #endif
135
136 #define _COMPONENT ACPI_HOTKEY_COMPONENT
137
138 MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte");
139 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
140 MODULE_LICENSE("GPL");
141
142 #define LOGPREFIX "pcc_acpi: "
143
144 /* Define ACPI PATHs */
145 /* Lets note hotkeys */
146 #define METHOD_HKEY_QUERY "HINF"
147 #define METHOD_HKEY_SQTY "SQTY"
148 #define METHOD_HKEY_SINF "SINF"
149 #define METHOD_HKEY_SSET "SSET"
150 #define HKEY_NOTIFY 0x80
151
152 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
153 #define ACPI_PCC_DEVICE_NAME "Hotkey"
154 #define ACPI_PCC_CLASS "pcc"
155
156 #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
157
158 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
159 ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00
160 */
161 enum SINF_BITS { SINF_NUM_BATTERIES = 0,
162 SINF_LCD_TYPE,
163 SINF_AC_MAX_BRIGHT,
164 SINF_AC_MIN_BRIGHT,
165 SINF_AC_CUR_BRIGHT,
166 SINF_DC_MAX_BRIGHT,
167 SINF_DC_MIN_BRIGHT,
168 SINF_DC_CUR_BRIGHT,
169 SINF_MUTE,
170 SINF_RESERVED,
171 SINF_ENV_STATE,
172 SINF_STICKY_KEY = 0x80,
173 };
174 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
175
176 static int acpi_pcc_hotkey_add(struct acpi_device *device);
177 static int acpi_pcc_hotkey_remove(struct acpi_device *device);
178 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
179
180 static const struct acpi_device_id pcc_device_ids[] = {
181 { "MAT0012", 0},
182 { "MAT0013", 0},
183 { "MAT0018", 0},
184 { "MAT0019", 0},
185 { "", 0},
186 };
187 MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
188
189 #ifdef CONFIG_PM_SLEEP
190 static int acpi_pcc_hotkey_resume(struct device *dev);
191 #endif
192 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
193
194 static struct acpi_driver acpi_pcc_driver = {
195 .name = ACPI_PCC_DRIVER_NAME,
196 .class = ACPI_PCC_CLASS,
197 .ids = pcc_device_ids,
198 .ops = {
199 .add = acpi_pcc_hotkey_add,
200 .remove = acpi_pcc_hotkey_remove,
201 .notify = acpi_pcc_hotkey_notify,
202 },
203 .drv.pm = &acpi_pcc_hotkey_pm,
204 };
205
206 static const struct key_entry panasonic_keymap[] = {
207 { KE_KEY, 0, { KEY_RESERVED } },
208 { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
209 { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
210 { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
211 { KE_KEY, 4, { KEY_MUTE } },
212 { KE_KEY, 5, { KEY_VOLUMEDOWN } },
213 { KE_KEY, 6, { KEY_VOLUMEUP } },
214 { KE_KEY, 7, { KEY_SLEEP } },
215 { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
216 { KE_KEY, 9, { KEY_BATTERY } },
217 { KE_KEY, 10, { KEY_SUSPEND } },
218 { KE_END, 0 }
219 };
220
221 struct pcc_acpi {
222 acpi_handle handle;
223 unsigned long num_sifr;
224 int sticky_mode;
225 u32 *sinf;
226 struct acpi_device *device;
227 struct input_dev *input_dev;
228 struct backlight_device *backlight;
229 };
230
231 struct pcc_keyinput {
232 struct acpi_hotkey *hotkey;
233 };
234
235 /* method access functions */
236 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
237 {
238 union acpi_object in_objs[] = {
239 { .integer.type = ACPI_TYPE_INTEGER,
240 .integer.value = func, },
241 { .integer.type = ACPI_TYPE_INTEGER,
242 .integer.value = val, },
243 };
244 struct acpi_object_list params = {
245 .count = ARRAY_SIZE(in_objs),
246 .pointer = in_objs,
247 };
248 acpi_status status = AE_OK;
249
250 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
251 &params, NULL);
252
253 return (status == AE_OK) ? 0 : -EIO;
254 }
255
256 static inline int acpi_pcc_get_sqty(struct acpi_device *device)
257 {
258 unsigned long long s;
259 acpi_status status;
260
261 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
262 NULL, &s);
263 if (ACPI_SUCCESS(status))
264 return s;
265 else {
266 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
267 "evaluation error HKEY.SQTY\n"));
268 return -EINVAL;
269 }
270 }
271
272 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
273 {
274 acpi_status status;
275 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
276 union acpi_object *hkey = NULL;
277 int i;
278
279 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
280 &buffer);
281 if (ACPI_FAILURE(status)) {
282 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
283 "evaluation error HKEY.SINF\n"));
284 return 0;
285 }
286
287 hkey = buffer.pointer;
288 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
289 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
290 status = AE_ERROR;
291 goto end;
292 }
293
294 if (pcc->num_sifr < hkey->package.count) {
295 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
296 "SQTY reports bad SINF length\n"));
297 status = AE_ERROR;
298 goto end;
299 }
300
301 for (i = 0; i < hkey->package.count; i++) {
302 union acpi_object *element = &(hkey->package.elements[i]);
303 if (likely(element->type == ACPI_TYPE_INTEGER)) {
304 pcc->sinf[i] = element->integer.value;
305 } else
306 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
307 "Invalid HKEY.SINF data\n"));
308 }
309 pcc->sinf[hkey->package.count] = -1;
310
311 end:
312 kfree(buffer.pointer);
313 return status == AE_OK;
314 }
315
316 /* backlight API interface functions */
317
318 /* This driver currently treats AC and DC brightness identical,
319 * since we don't need to invent an interface to the core ACPI
320 * logic to receive events in case a power supply is plugged in
321 * or removed */
322
323 static int bl_get(struct backlight_device *bd)
324 {
325 struct pcc_acpi *pcc = bl_get_data(bd);
326
327 if (!acpi_pcc_retrieve_biosdata(pcc))
328 return -EIO;
329
330 return pcc->sinf[SINF_AC_CUR_BRIGHT];
331 }
332
333 static int bl_set_status(struct backlight_device *bd)
334 {
335 struct pcc_acpi *pcc = bl_get_data(bd);
336 int bright = bd->props.brightness;
337 int rc;
338
339 if (!acpi_pcc_retrieve_biosdata(pcc))
340 return -EIO;
341
342 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
343 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
344
345 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
346 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
347
348 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
349 bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
350 return -EINVAL;
351
352 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
353 if (rc < 0)
354 return rc;
355
356 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
357 }
358
359 static const struct backlight_ops pcc_backlight_ops = {
360 .get_brightness = bl_get,
361 .update_status = bl_set_status,
362 };
363
364
365 /* sysfs user interface functions */
366
367 static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr,
368 char *buf)
369 {
370 struct acpi_device *acpi = to_acpi_device(dev);
371 struct pcc_acpi *pcc = acpi_driver_data(acpi);
372
373 if (!acpi_pcc_retrieve_biosdata(pcc))
374 return -EIO;
375
376 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
377 }
378
379 static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr,
380 char *buf)
381 {
382 struct acpi_device *acpi = to_acpi_device(dev);
383 struct pcc_acpi *pcc = acpi_driver_data(acpi);
384
385 if (!acpi_pcc_retrieve_biosdata(pcc))
386 return -EIO;
387
388 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
389 }
390
391 static ssize_t show_mute(struct device *dev, struct device_attribute *attr,
392 char *buf)
393 {
394 struct acpi_device *acpi = to_acpi_device(dev);
395 struct pcc_acpi *pcc = acpi_driver_data(acpi);
396
397 if (!acpi_pcc_retrieve_biosdata(pcc))
398 return -EIO;
399
400 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
401 }
402
403 static ssize_t show_sticky(struct device *dev, struct device_attribute *attr,
404 char *buf)
405 {
406 struct acpi_device *acpi = to_acpi_device(dev);
407 struct pcc_acpi *pcc = acpi_driver_data(acpi);
408
409 if (!acpi_pcc_retrieve_biosdata(pcc))
410 return -EIO;
411
412 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_STICKY_KEY]);
413 }
414
415 static ssize_t set_sticky(struct device *dev, struct device_attribute *attr,
416 const char *buf, size_t count)
417 {
418 struct acpi_device *acpi = to_acpi_device(dev);
419 struct pcc_acpi *pcc = acpi_driver_data(acpi);
420 int val;
421
422 if (count && sscanf(buf, "%i", &val) == 1 &&
423 (val == 0 || val == 1)) {
424 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
425 pcc->sticky_mode = val;
426 }
427
428 return count;
429 }
430
431 static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL);
432 static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL);
433 static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL);
434 static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky);
435
436 static struct attribute *pcc_sysfs_entries[] = {
437 &dev_attr_numbatt.attr,
438 &dev_attr_lcdtype.attr,
439 &dev_attr_mute.attr,
440 &dev_attr_sticky_key.attr,
441 NULL,
442 };
443
444 static struct attribute_group pcc_attr_group = {
445 .name = NULL, /* put in device directory */
446 .attrs = pcc_sysfs_entries,
447 };
448
449
450 /* hotkey input device driver */
451
452 static int sleep_keydown_seen;
453 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
454 {
455 struct input_dev *hotk_input_dev = pcc->input_dev;
456 int rc;
457 unsigned long long result;
458
459 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
460 NULL, &result);
461 if (!ACPI_SUCCESS(rc)) {
462 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
463 "error getting hotkey status\n"));
464 return;
465 }
466
467 /* hack: some firmware sends no key down for sleep / hibernate */
468 if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) {
469 if (result & 0x80)
470 sleep_keydown_seen = 1;
471 if (!sleep_keydown_seen)
472 sparse_keymap_report_event(hotk_input_dev,
473 result & 0xf, 0x80, false);
474 }
475
476 if (!sparse_keymap_report_event(hotk_input_dev,
477 result & 0xf, result & 0x80, false))
478 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
479 "Unknown hotkey event: %d\n", result));
480 }
481
482 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
483 {
484 struct pcc_acpi *pcc = acpi_driver_data(device);
485
486 switch (event) {
487 case HKEY_NOTIFY:
488 acpi_pcc_generate_keyinput(pcc);
489 break;
490 default:
491 /* nothing to do */
492 break;
493 }
494 }
495
496 static int acpi_pcc_init_input(struct pcc_acpi *pcc)
497 {
498 struct input_dev *input_dev;
499 int error;
500
501 input_dev = input_allocate_device();
502 if (!input_dev)
503 return -ENOMEM;
504
505 input_dev->name = ACPI_PCC_DRIVER_NAME;
506 input_dev->phys = ACPI_PCC_INPUT_PHYS;
507 input_dev->id.bustype = BUS_HOST;
508 input_dev->id.vendor = 0x0001;
509 input_dev->id.product = 0x0001;
510 input_dev->id.version = 0x0100;
511
512 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
513 if (error) {
514 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
515 "Unable to setup input device keymap\n"));
516 goto err_free_dev;
517 }
518
519 error = input_register_device(input_dev);
520 if (error) {
521 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
522 "Unable to register input device\n"));
523 goto err_free_keymap;
524 }
525
526 pcc->input_dev = input_dev;
527 return 0;
528
529 err_free_keymap:
530 sparse_keymap_free(input_dev);
531 err_free_dev:
532 input_free_device(input_dev);
533 return error;
534 }
535
536 static void acpi_pcc_destroy_input(struct pcc_acpi *pcc)
537 {
538 sparse_keymap_free(pcc->input_dev);
539 input_unregister_device(pcc->input_dev);
540 /*
541 * No need to input_free_device() since core input API refcounts
542 * and free()s the device.
543 */
544 }
545
546 /* kernel module interface */
547
548 #ifdef CONFIG_PM_SLEEP
549 static int acpi_pcc_hotkey_resume(struct device *dev)
550 {
551 struct pcc_acpi *pcc;
552
553 if (!dev)
554 return -EINVAL;
555
556 pcc = acpi_driver_data(to_acpi_device(dev));
557 if (!pcc)
558 return -EINVAL;
559
560 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n",
561 pcc->sticky_mode));
562
563 return acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode);
564 }
565 #endif
566
567 static int acpi_pcc_hotkey_add(struct acpi_device *device)
568 {
569 struct backlight_properties props;
570 struct pcc_acpi *pcc;
571 int num_sifr, result;
572
573 if (!device)
574 return -EINVAL;
575
576 num_sifr = acpi_pcc_get_sqty(device);
577
578 if (num_sifr < 0 || num_sifr > 255) {
579 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr out of range"));
580 return -ENODEV;
581 }
582
583 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
584 if (!pcc) {
585 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
586 "Couldn't allocate mem for pcc"));
587 return -ENOMEM;
588 }
589
590 pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL);
591 if (!pcc->sinf) {
592 result = -ENOMEM;
593 goto out_hotkey;
594 }
595
596 pcc->device = device;
597 pcc->handle = device->handle;
598 pcc->num_sifr = num_sifr;
599 device->driver_data = pcc;
600 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
601 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
602
603 result = acpi_pcc_init_input(pcc);
604 if (result) {
605 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
606 "Error installing keyinput handler\n"));
607 goto out_sinf;
608 }
609
610 if (!acpi_pcc_retrieve_biosdata(pcc)) {
611 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
612 "Couldn't retrieve BIOS data\n"));
613 result = -EIO;
614 goto out_input;
615 }
616 /* initialize backlight */
617 memset(&props, 0, sizeof(struct backlight_properties));
618 props.type = BACKLIGHT_PLATFORM;
619 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
620 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
621 &pcc_backlight_ops, &props);
622 if (IS_ERR(pcc->backlight)) {
623 result = PTR_ERR(pcc->backlight);
624 goto out_input;
625 }
626
627 /* read the initial brightness setting from the hardware */
628 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
629
630 /* read the initial sticky key mode from the hardware */
631 pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY];
632
633 /* add sysfs attributes */
634 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
635 if (result)
636 goto out_backlight;
637
638 return 0;
639
640 out_backlight:
641 backlight_device_unregister(pcc->backlight);
642 out_input:
643 acpi_pcc_destroy_input(pcc);
644 out_sinf:
645 kfree(pcc->sinf);
646 out_hotkey:
647 kfree(pcc);
648
649 return result;
650 }
651
652 static int acpi_pcc_hotkey_remove(struct acpi_device *device)
653 {
654 struct pcc_acpi *pcc = acpi_driver_data(device);
655
656 if (!device || !pcc)
657 return -EINVAL;
658
659 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
660
661 backlight_device_unregister(pcc->backlight);
662
663 acpi_pcc_destroy_input(pcc);
664
665 kfree(pcc->sinf);
666 kfree(pcc);
667
668 return 0;
669 }
670
671 module_acpi_driver(acpi_pcc_driver);
Linux with added FPC-III support