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-rw-r--r--drivers/misc/panasonic-laptop.c767
1 files changed, 767 insertions, 0 deletions
diff --git a/drivers/misc/panasonic-laptop.c b/drivers/misc/panasonic-laptop.c
new file mode 100644
index 000000000000..9aecda5a399c
--- /dev/null
+++ b/drivers/misc/panasonic-laptop.c
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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/version.h>
120#include <linux/kernel.h>
121#include <linux/module.h>
122#include <linux/init.h>
123#include <linux/types.h>
124#include <linux/backlight.h>
125#include <linux/ctype.h>
126#include <linux/seq_file.h>
127#include <linux/uaccess.h>
128#include <acpi/acpi_bus.h>
129#include <acpi/acpi_drivers.h>
130#include <linux/input.h>
131
132
133#ifndef ACPI_HOTKEY_COMPONENT
134#define ACPI_HOTKEY_COMPONENT 0x10000000
135#endif
136
137#define _COMPONENT ACPI_HOTKEY_COMPONENT
138
139MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte");
140MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
141MODULE_LICENSE("GPL");
142
143#define LOGPREFIX "pcc_acpi: "
144
145/* Define ACPI PATHs */
146/* Lets note hotkeys */
147#define METHOD_HKEY_QUERY "HINF"
148#define METHOD_HKEY_SQTY "SQTY"
149#define METHOD_HKEY_SINF "SINF"
150#define METHOD_HKEY_SSET "SSET"
151#define HKEY_NOTIFY 0x80
152
153#define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
154#define ACPI_PCC_DEVICE_NAME "Hotkey"
155#define ACPI_PCC_CLASS "pcc"
156
157#define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
158
159/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
160 ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00
161*/
162enum SINF_BITS { SINF_NUM_BATTERIES = 0,
163 SINF_LCD_TYPE,
164 SINF_AC_MAX_BRIGHT,
165 SINF_AC_MIN_BRIGHT,
166 SINF_AC_CUR_BRIGHT,
167 SINF_DC_MAX_BRIGHT,
168 SINF_DC_MIN_BRIGHT,
169 SINF_DC_CUR_BRIGHT,
170 SINF_MUTE,
171 SINF_RESERVED,
172 SINF_ENV_STATE,
173 SINF_STICKY_KEY = 0x80,
174 };
175/* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
176
177static int acpi_pcc_hotkey_add(struct acpi_device *device);
178static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type);
179static int acpi_pcc_hotkey_resume(struct acpi_device *device);
180
181static const struct acpi_device_id pcc_device_ids[] = {
182 { "MAT0012", 0},
183 { "MAT0013", 0},
184 { "MAT0018", 0},
185 { "MAT0019", 0},
186 { "", 0},
187};
188
189static struct acpi_driver acpi_pcc_driver = {
190 .name = ACPI_PCC_DRIVER_NAME,
191 .class = ACPI_PCC_CLASS,
192 .ids = pcc_device_ids,
193 .ops = {
194 .add = acpi_pcc_hotkey_add,
195 .remove = acpi_pcc_hotkey_remove,
196 .resume = acpi_pcc_hotkey_resume,
197 },
198};
199
200#define KEYMAP_SIZE 11
201static const int initial_keymap[KEYMAP_SIZE] = {
202 /* 0 */ KEY_RESERVED,
203 /* 1 */ KEY_BRIGHTNESSDOWN,
204 /* 2 */ KEY_BRIGHTNESSUP,
205 /* 3 */ KEY_DISPLAYTOGGLE,
206 /* 4 */ KEY_MUTE,
207 /* 5 */ KEY_VOLUMEDOWN,
208 /* 6 */ KEY_VOLUMEUP,
209 /* 7 */ KEY_SLEEP,
210 /* 8 */ KEY_PROG1, /* Change CPU boost */
211 /* 9 */ KEY_BATTERY,
212 /* 10 */ KEY_SUSPEND,
213};
214
215struct pcc_acpi {
216 acpi_handle handle;
217 unsigned long num_sifr;
218 int sticky_mode;
219 u32 *sinf;
220 struct acpi_device *device;
221 struct input_dev *input_dev;
222 struct backlight_device *backlight;
223 int keymap[KEYMAP_SIZE];
224};
225
226struct pcc_keyinput {
227 struct acpi_hotkey *hotkey;
228};
229
230/* method access functions */
231static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
232{
233 union acpi_object in_objs[] = {
234 { .integer.type = ACPI_TYPE_INTEGER,
235 .integer.value = func, },
236 { .integer.type = ACPI_TYPE_INTEGER,
237 .integer.value = val, },
238 };
239 struct acpi_object_list params = {
240 .count = ARRAY_SIZE(in_objs),
241 .pointer = in_objs,
242 };
243 acpi_status status = AE_OK;
244
245 ACPI_FUNCTION_TRACE("acpi_pcc_write_sset");
246
247 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
248 &params, NULL);
249
250 return status == AE_OK;
251}
252
253static inline int acpi_pcc_get_sqty(struct acpi_device *device)
254{
255 unsigned long s;
256 acpi_status status;
257
258 ACPI_FUNCTION_TRACE("acpi_pcc_get_sqty");
259
260 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
261 NULL, &s);
262 if (ACPI_SUCCESS(status))
263 return s;
264 else {
265 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
266 "evaluation error HKEY.SQTY\n"));
267 return -EINVAL;
268 }
269}
270
271static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc, u32 *sinf)
272{
273 acpi_status status;
274 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
275 union acpi_object *hkey = NULL;
276 int i;
277
278 ACPI_FUNCTION_TRACE("acpi_pcc_retrieve_biosdata");
279
280 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, 0,
281 &buffer);
282 if (ACPI_FAILURE(status)) {
283 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
284 "evaluation error HKEY.SINF\n"));
285 return 0;
286 }
287
288 hkey = buffer.pointer;
289 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
290 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
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 sinf[i] = element->integer.value;
305 } else
306 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
307 "Invalid HKEY.SINF data\n"));
308 }
309 sinf[hkey->package.count] = -1;
310
311end:
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
323static 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, pcc->sinf))
328 return -EIO;
329
330 return pcc->sinf[SINF_AC_CUR_BRIGHT];
331}
332
333static 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, pcc->sinf))
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
359static 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
367static 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, pcc->sinf))
374 return -EIO;
375
376 return sprintf(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
377}
378
379static 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, pcc->sinf))
386 return -EIO;
387
388 return sprintf(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
389}
390
391static 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, pcc->sinf))
398 return -EIO;
399
400 return sprintf(buf, "%u\n", pcc->sinf[SINF_MUTE]);
401}
402
403static 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, pcc->sinf))
410 return -EIO;
411
412 return sprintf(buf, "%u\n", pcc->sinf[SINF_STICKY_KEY]);
413}
414
415static 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
431static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL);
432static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL);
433static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL);
434static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky);
435
436static 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
444static 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
452static int pcc_getkeycode(struct input_dev *dev, int scancode, int *keycode)
453{
454 struct pcc_acpi *pcc = input_get_drvdata(dev);
455
456 if (scancode >= ARRAY_SIZE(pcc->keymap))
457 return -EINVAL;
458
459 *keycode = pcc->keymap[scancode];
460
461 return 0;
462}
463
464static int keymap_get_by_keycode(struct pcc_acpi *pcc, int keycode)
465{
466 int i;
467
468 for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) {
469 if (pcc->keymap[i] == keycode)
470 return i+1;
471 }
472
473 return 0;
474}
475
476static int pcc_setkeycode(struct input_dev *dev, int scancode, int keycode)
477{
478 struct pcc_acpi *pcc = input_get_drvdata(dev);
479 int oldkeycode;
480
481 if (scancode >= ARRAY_SIZE(pcc->keymap))
482 return -EINVAL;
483
484 if (keycode < 0 || keycode > KEY_MAX)
485 return -EINVAL;
486
487 oldkeycode = pcc->keymap[scancode];
488 pcc->keymap[scancode] = keycode;
489
490 set_bit(keycode, dev->keybit);
491
492 if (!keymap_get_by_keycode(pcc, oldkeycode))
493 clear_bit(oldkeycode, dev->keybit);
494
495 return 0;
496}
497
498static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
499{
500 struct input_dev *hotk_input_dev = pcc->input_dev;
501 int rc;
502 int key_code, hkey_num;
503 unsigned long result;
504
505 ACPI_FUNCTION_TRACE("acpi_pcc_generate_keyinput");
506
507 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
508 NULL, &result);
509 if (!ACPI_SUCCESS(rc)) {
510 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
511 "error getting hotkey status\n"));
512 return;
513 }
514
515 acpi_bus_generate_proc_event(pcc->device, HKEY_NOTIFY, result);
516
517 hkey_num = result & 0xf;
518
519 if (hkey_num < 0 || hkey_num > ARRAY_SIZE(pcc->keymap)) {
520 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
521 "hotkey number out of range: %d\n",
522 hkey_num));
523 return;
524 }
525
526 key_code = pcc->keymap[hkey_num];
527
528 if (key_code != KEY_RESERVED) {
529 int pushed = (result & 0x80) ? TRUE : FALSE;
530
531 input_report_key(hotk_input_dev, key_code, pushed);
532 input_sync(hotk_input_dev);
533 }
534
535 return;
536}
537
538static void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data)
539{
540 struct pcc_acpi *pcc = (struct pcc_acpi *) data;
541
542 ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_notify");
543
544 switch (event) {
545 case HKEY_NOTIFY:
546 acpi_pcc_generate_keyinput(pcc);
547 break;
548 default:
549 /* nothing to do */
550 break;
551 }
552}
553
554static int acpi_pcc_init_input(struct pcc_acpi *pcc)
555{
556 int i, rc;
557
558 ACPI_FUNCTION_TRACE("acpi_pcc_init_input");
559
560 pcc->input_dev = input_allocate_device();
561 if (!pcc->input_dev) {
562 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
563 "Couldn't allocate input device for hotkey"));
564 return -ENOMEM;
565 }
566
567 pcc->input_dev->evbit[0] = BIT(EV_KEY);
568
569 pcc->input_dev->name = ACPI_PCC_DRIVER_NAME;
570 pcc->input_dev->phys = ACPI_PCC_INPUT_PHYS;
571 pcc->input_dev->id.bustype = BUS_HOST;
572 pcc->input_dev->id.vendor = 0x0001;
573 pcc->input_dev->id.product = 0x0001;
574 pcc->input_dev->id.version = 0x0100;
575 pcc->input_dev->getkeycode = pcc_getkeycode;
576 pcc->input_dev->setkeycode = pcc_setkeycode;
577
578 /* load initial keymap */
579 memcpy(pcc->keymap, initial_keymap, sizeof(pcc->keymap));
580
581 for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++)
582 __set_bit(pcc->keymap[i], pcc->input_dev->keybit);
583 __clear_bit(KEY_RESERVED, pcc->input_dev->keybit);
584
585 input_set_drvdata(pcc->input_dev, pcc);
586
587 rc = input_register_device(pcc->input_dev);
588 if (rc < 0)
589 input_free_device(pcc->input_dev);
590
591 return rc;
592}
593
594/* kernel module interface */
595
596static int acpi_pcc_hotkey_resume(struct acpi_device *device)
597{
598 struct pcc_acpi *pcc = acpi_driver_data(device);
599 acpi_status status = AE_OK;
600
601 ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_resume");
602
603 if (device == NULL || pcc == NULL)
604 return -EINVAL;
605
606 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n",
607 pcc->sticky_mode));
608
609 status = acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode);
610
611 return status == AE_OK ? 0 : -EINVAL;
612}
613
614static int acpi_pcc_hotkey_add(struct acpi_device *device)
615{
616 acpi_status status;
617 struct pcc_acpi *pcc;
618 int num_sifr, result;
619
620 ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_add");
621
622 if (!device)
623 return -EINVAL;
624
625 num_sifr = acpi_pcc_get_sqty(device);
626
627 if (num_sifr > 255) {
628 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large"));
629 return -ENODEV;
630 }
631
632 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
633 if (!pcc) {
634 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
635 "Couldn't allocate mem for pcc"));
636 return -ENOMEM;
637 }
638
639 pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL);
640 if (!pcc->sinf) {
641 result = -ENOMEM;
642 goto out_hotkey;
643 }
644
645 pcc->device = device;
646 pcc->handle = device->handle;
647 pcc->num_sifr = num_sifr;
648 acpi_driver_data(device) = pcc;
649 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
650 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
651
652 result = acpi_pcc_init_input(pcc);
653 if (result) {
654 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
655 "Error installing keyinput handler\n"));
656 goto out_sinf;
657 }
658
659 /* initialize hotkey input device */
660 status = acpi_install_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY,
661 acpi_pcc_hotkey_notify, pcc);
662
663 if (ACPI_FAILURE(status)) {
664 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
665 "Error installing notify handler\n"));
666 result = -ENODEV;
667 goto out_input;
668 }
669
670 /* initialize backlight */
671 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
672 &pcc_backlight_ops);
673 if (IS_ERR(pcc->backlight))
674 goto out_notify;
675
676 if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) {
677 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
678 "Couldn't retrieve BIOS data\n"));
679 goto out_backlight;
680 }
681
682 /* read the initial brightness setting from the hardware */
683 pcc->backlight->props.max_brightness =
684 pcc->sinf[SINF_AC_MAX_BRIGHT];
685 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
686
687 /* read the initial sticky key mode from the hardware */
688 pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY];
689
690 /* add sysfs attributes */
691 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
692 if (result)
693 goto out_backlight;
694
695 return 0;
696
697out_backlight:
698 backlight_device_unregister(pcc->backlight);
699out_notify:
700 acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY,
701 acpi_pcc_hotkey_notify);
702out_input:
703 input_unregister_device(pcc->input_dev);
704 /* no need to input_free_device() since core input API refcount and
705 * free()s the device */
706out_sinf:
707 kfree(pcc->sinf);
708out_hotkey:
709 kfree(pcc);
710
711 return result;
712}
713
714static int __init acpi_pcc_init(void)
715{
716 int result = 0;
717
718 ACPI_FUNCTION_TRACE("acpi_pcc_init");
719
720 if (acpi_disabled)
721 return -ENODEV;
722
723 result = acpi_bus_register_driver(&acpi_pcc_driver);
724 if (result < 0) {
725 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
726 "Error registering hotkey driver\n"));
727 return -ENODEV;
728 }
729
730 return 0;
731}
732
733static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type)
734{
735 struct pcc_acpi *pcc = acpi_driver_data(device);
736
737 ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_remove");
738
739 if (!device || !pcc)
740 return -EINVAL;
741
742 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
743
744 backlight_device_unregister(pcc->backlight);
745
746 acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY,
747 acpi_pcc_hotkey_notify);
748
749 input_unregister_device(pcc->input_dev);
750 /* no need to input_free_device() since core input API refcount and
751 * free()s the device */
752
753 kfree(pcc->sinf);
754 kfree(pcc);
755
756 return 0;
757}
758
759static void __exit acpi_pcc_exit(void)
760{
761 ACPI_FUNCTION_TRACE("acpi_pcc_exit");
762
763 acpi_bus_unregister_driver(&acpi_pcc_driver);
764}
765
766module_init(acpi_pcc_init);
767module_exit(acpi_pcc_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-20 21:33:25 -0500