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platform/x86: panasonic-laptop: don't report duplicate brightness key-presses
[mirror_ubuntu-jammy-kernel.git] / drivers / platform / x86 / panasonic-laptop.c
CommitLineData
67d0ae42 1// SPDX-License-Identifier: GPL-2.0-only
709ee531
HW		 2/*
3 * Panasonic HotKey and LCD brightness control driver
4 * (C) 2004 Hiroshi Miura <miura@da-cha.org>
5 * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
6 * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp>
7 * (C) 2004 David Bronaugh <dbronaugh>
8 * (C) 2006-2008 Harald Welte <laforge@gnumonks.org>
9 *
10 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
11 *
709ee531
HW		 12 *---------------------------------------------------------------------------
13 *
14 * ChangeLog:
d5a81d8e 15 * Aug.18, 2020 Kenneth Chan <kenneth.t.chan@gmail.com>
25dd390c 16 * -v0.98 add platform devices for firmware brightness registers
468f96bf 17 * add support for battery charging threshold (eco mode)
ed83c917 18 * resolve hotkey double trigger
e3a9afbb 19 * add write support to mute
00856351 20 * fix sticky_key init bug
80373ad0
KC		 21 * fix naming of platform files for consistency with other
22 * modules
0119fbc0 23 * split MODULE_AUTHOR() by one author per macro call
f1aaf914 24 * replace ACPI prints with pr_*() macros
d5a81d8e
KC		 25 * -v0.97 add support for cdpower hardware switch
26 * -v0.96 merge Lucina's enhancement
27 * Jan.13, 2009 Martin Lucina <mato@kotelna.sk>
28 * - add support for optical driver power in
29 * Y and W series
30 *
709ee531
HW		 31 * Sep.23, 2008 Harald Welte <laforge@gnumonks.org>
32 * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to
33 * drivers/misc/panasonic-laptop.c
34 *
35 * Jul.04, 2008 Harald Welte <laforge@gnumonks.org>
36 * -v0.94 replace /proc interface with device attributes
37 * support {set,get}keycode on th input device
38 *
39 * Jun.27, 2008 Harald Welte <laforge@gnumonks.org>
40 * -v0.92 merge with 2.6.26-rc6 input API changes
41 * remove broken <= 2.6.15 kernel support
42 * resolve all compiler warnings
43 * various coding style fixes (checkpatch.pl)
44 * add support for backlight api
45 * major code restructuring
46 *
47 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org>
48 * -v0.91 merge with 2.6.24-rc6 ACPI changes
49 *
50 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
51 * -v0.9 remove warning about section reference.
52 * remove acpi_os_free
53 * add /proc/acpi/pcc/brightness interface for HAL access
54 * merge dbronaugh's enhancement
55 * Aug.17, 2004 David Bronaugh (dbronaugh)
56 * - Added screen brightness setting interface
57 * Thanks to FreeBSD crew (acpi_panasonic.c)
58 * for the ideas I needed to accomplish it
59 *
60 * May.29, 2006 Hiroshi Miura <miura@da-cha.org>
61 * -v0.8.4 follow to change keyinput structure
62 * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>,
63 * Jacob Bower <jacob.bower@ic.ac.uk> and
64 * Hiroshi Yokota for providing solutions.
65 *
66 * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org>
67 * -v0.8.2 merge code of YOKOTA Hiroshi
68 * <yokota@netlab.is.tsukuba.ac.jp>.
69 * Add sticky key mode interface.
70 * Refactoring acpi_pcc_generate_keyinput().
71 *
72 * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org>
73 * -v0.8 Generate key input event on input subsystem.
74 * This is based on yet another driver written by
75 * Ryuta Nakanishi.
76 *
77 * Sep.10, 2004 Hiroshi Miura <miura@da-cha.org>
78 * -v0.7 Change proc interface functions using seq_file
79 * facility as same as other ACPI drivers.
80 *
81 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
82 * -v0.6.4 Fix a silly error with status checking
83 *
84 * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org>
85 * -v0.6.3 replace read_acpi_int by standard function
86 * acpi_evaluate_integer
87 * some clean up and make smart copyright notice.
88 * fix return value of pcc_acpi_get_key()
89 * fix checking return value of acpi_bus_register_driver()
90 *
91 * Aug.22, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
92 * -v0.6.2 Add check on ACPI data (num_sifr)
93 * Coding style cleanups, better error messages/handling
94 * Fixed an off-by-one error in memory allocation
95 *
96 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
97 * -v0.6.1 Fix a silly error with status checking
98 *
99 * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
100 * - v0.6 Correct brightness controls to reflect reality
101 * based on information gleaned by Hiroshi Miura
102 * and discussions with Hiroshi Miura
103 *
104 * Aug.10, 2004 Hiroshi Miura <miura@da-cha.org>
105 * - v0.5 support LCD brightness control
106 * based on the disclosed information by MEI.
107 *
108 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
109 * - v0.4 first post version
110 * add function to retrive SIFR
111 *
112 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
113 * - v0.3 get proper status of hotkey
114 *
115 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
116 * - v0.2 add HotKey handler
117 *
118 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
119 * - v0.1 start from toshiba_acpi driver written by John Belmonte
709ee531
HW		 120 */
121
247c8829 122#include <linux/acpi.h>
709ee531
HW		 123#include <linux/backlight.h>
124#include <linux/ctype.h>
247c8829 125#include <linux/init.h>
709ee531 126#include <linux/input.h>
1a765cac 127#include <linux/input/sparse-keymap.h>
247c8829
HG		 128#include <linux/kernel.h>
129#include <linux/module.h>
d5a81d8e 130#include <linux/platform_device.h>
247c8829
HG		 131#include <linux/seq_file.h>
132#include <linux/slab.h>
133#include <linux/types.h>
134#include <linux/uaccess.h>
e516ce9b 135#include <acpi/video.h>
25dd390c 136
0119fbc0
KC		 137MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
138MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>");
139MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
140MODULE_AUTHOR("Martin Lucina <mato@kotelna.sk>");
141MODULE_AUTHOR("Kenneth Chan <kenneth.t.chan@gmail.com>");
709ee531
HW		 142MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
143MODULE_LICENSE("GPL");
144
145#define LOGPREFIX "pcc_acpi: "
146
147/* Define ACPI PATHs */
148/* Lets note hotkeys */
149#define METHOD_HKEY_QUERY "HINF"
150#define METHOD_HKEY_SQTY "SQTY"
151#define METHOD_HKEY_SINF "SINF"
152#define METHOD_HKEY_SSET "SSET"
468f96bf
KC		 153#define METHOD_ECWR "\\_SB.ECWR"
154#define HKEY_NOTIFY 0x80
155#define ECO_MODE_OFF 0x00
156#define ECO_MODE_ON 0x80
709ee531
HW		 157
158#define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
159#define ACPI_PCC_DEVICE_NAME "Hotkey"
160#define ACPI_PCC_CLASS "pcc"
161
162#define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
163
164/* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
468f96bf 165 ECO_MODEs: 0x03 = off, 0x83 = on
709ee531
HW		 166*/
167enum SINF_BITS { SINF_NUM_BATTERIES = 0,
168 SINF_LCD_TYPE,
169 SINF_AC_MAX_BRIGHT,
170 SINF_AC_MIN_BRIGHT,
171 SINF_AC_CUR_BRIGHT,
172 SINF_DC_MAX_BRIGHT,
173 SINF_DC_MIN_BRIGHT,
174 SINF_DC_CUR_BRIGHT,
175 SINF_MUTE,
176 SINF_RESERVED,
468f96bf 177 SINF_ECO_MODE = 0x0A,
25dd390c 178 SINF_CUR_BRIGHT = 0x0D,
709ee531
HW		 179 SINF_STICKY_KEY = 0x80,
180 };
181/* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
182
183static int acpi_pcc_hotkey_add(struct acpi_device *device);
51fac838 184static int acpi_pcc_hotkey_remove(struct acpi_device *device);
cddd1f71 185static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
709ee531
HW		 186
187static const struct acpi_device_id pcc_device_ids[] = {
188 { "MAT0012", 0},
189 { "MAT0013", 0},
190 { "MAT0018", 0},
191 { "MAT0019", 0},
192 { "", 0},
193};
c542aade 194MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
709ee531 195
3567a4e2 196#ifdef CONFIG_PM_SLEEP
a7377419 197static int acpi_pcc_hotkey_resume(struct device *dev);
3567a4e2 198#endif
a7377419
RW		 199static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
200
709ee531
HW		 201static struct acpi_driver acpi_pcc_driver = {
202 .name = ACPI_PCC_DRIVER_NAME,
203 .class = ACPI_PCC_CLASS,
204 .ids = pcc_device_ids,
205 .ops = {
206 .add = acpi_pcc_hotkey_add,
207 .remove = acpi_pcc_hotkey_remove,
cddd1f71 208 .notify = acpi_pcc_hotkey_notify,
709ee531 209 },
a7377419 210 .drv.pm = &acpi_pcc_hotkey_pm,
709ee531
HW		 211};
212
1a765cac
DT		 213static const struct key_entry panasonic_keymap[] = {
214 { KE_KEY, 0, { KEY_RESERVED } },
215 { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
216 { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
217 { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
218 { KE_KEY, 4, { KEY_MUTE } },
219 { KE_KEY, 5, { KEY_VOLUMEDOWN } },
220 { KE_KEY, 6, { KEY_VOLUMEUP } },
221 { KE_KEY, 7, { KEY_SLEEP } },
222 { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
223 { KE_KEY, 9, { KEY_BATTERY } },
224 { KE_KEY, 10, { KEY_SUSPEND } },
225 { KE_END, 0 }
709ee531
HW		 226};
227
228struct pcc_acpi {
229 acpi_handle handle;
230 unsigned long num_sifr;
00856351 231 int sticky_key;
468f96bf 232 int eco_mode;
e3a9afbb 233 int mute;
25dd390c
KC		 234 int ac_brightness;
235 int dc_brightness;
236 int current_brightness;
1a765cac 237 u32 *sinf;
709ee531
HW		 238 struct acpi_device *device;
239 struct input_dev *input_dev;
240 struct backlight_device *backlight;
d5a81d8e 241 struct platform_device *platform;
709ee531
HW		 242};
243
709ee531
HW		 244/* method access functions */
245static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
246{
247 union acpi_object in_objs[] = {
248 { .integer.type = ACPI_TYPE_INTEGER,
249 .integer.value = func, },
250 { .integer.type = ACPI_TYPE_INTEGER,
251 .integer.value = val, },
252 };
253 struct acpi_object_list params = {
254 .count = ARRAY_SIZE(in_objs),
255 .pointer = in_objs,
256 };
257 acpi_status status = AE_OK;
258
709ee531
HW		 259 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
260 &params, NULL);
261
9fab10cd 262 return (status == AE_OK) ? 0 : -EIO;
709ee531
HW		 263}
264
265static inline int acpi_pcc_get_sqty(struct acpi_device *device)
266{
3e2dab9a 267 unsigned long long s;
709ee531
HW		 268 acpi_status status;
269
709ee531
HW		 270 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
271 NULL, &s);
272 if (ACPI_SUCCESS(status))
273 return s;
274 else {
f1aaf914 275 pr_err("evaluation error HKEY.SQTY\n");
709ee531
HW		 276 return -EINVAL;
277 }
278}
279
e253fb94 280static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
709ee531
HW		 281{
282 acpi_status status;
283 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
284 union acpi_object *hkey = NULL;
285 int i;
286
a3c27056 287 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
709ee531
HW		 288 &buffer);
289 if (ACPI_FAILURE(status)) {
f1aaf914 290 pr_err("evaluation error HKEY.SINF\n");
709ee531
HW		 291 return 0;
292 }
293
294 hkey = buffer.pointer;
295 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
f1aaf914 296 pr_err("Invalid HKEY.SINF\n");
aa13857f 297 status = AE_ERROR;
709ee531
HW		 298 goto end;
299 }
300
301 if (pcc->num_sifr < hkey->package.count) {
f1aaf914 302 pr_err("SQTY reports bad SINF length\n");
709ee531
HW		 303 status = AE_ERROR;
304 goto end;
305 }
306
307 for (i = 0; i < hkey->package.count; i++) {
308 union acpi_object *element = &(hkey->package.elements[i]);
309 if (likely(element->type == ACPI_TYPE_INTEGER)) {
e253fb94 310 pcc->sinf[i] = element->integer.value;
709ee531 311 } else
f1aaf914 312 pr_err("Invalid HKEY.SINF data\n");
709ee531 313 }
e253fb94 314 pcc->sinf[hkey->package.count] = -1;
709ee531
HW		 315
316end:
317 kfree(buffer.pointer);
318 return status == AE_OK;
319}
320
321/* backlight API interface functions */
322
323/* This driver currently treats AC and DC brightness identical,
324 * since we don't need to invent an interface to the core ACPI
325 * logic to receive events in case a power supply is plugged in
326 * or removed */
327
328static int bl_get(struct backlight_device *bd)
329{
330 struct pcc_acpi *pcc = bl_get_data(bd);
331
e253fb94 332 if (!acpi_pcc_retrieve_biosdata(pcc))
709ee531
HW		 333 return -EIO;
334
335 return pcc->sinf[SINF_AC_CUR_BRIGHT];
336}
337
338static int bl_set_status(struct backlight_device *bd)
339{
340 struct pcc_acpi *pcc = bl_get_data(bd);
341 int bright = bd->props.brightness;
342 int rc;
343
e253fb94 344 if (!acpi_pcc_retrieve_biosdata(pcc))
709ee531
HW		 345 return -EIO;
346
347 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
348 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
349
350 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
351 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
352
353 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
354 bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
355 return -EINVAL;
356
357 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
358 if (rc < 0)
359 return rc;
360
361 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
362}
363
ec57af9c 364static const struct backlight_ops pcc_backlight_ops = {
709ee531
HW		 365 .get_brightness = bl_get,
366 .update_status = bl_set_status,
367};
368
369
d5a81d8e
KC		 370/* returns ACPI_SUCCESS if methods to control optical drive are present */
371
372static acpi_status check_optd_present(void)
373{
374 acpi_status status = AE_OK;
375 acpi_handle handle;
376
377 status = acpi_get_handle(NULL, "\\_SB.STAT", &handle);
378 if (ACPI_FAILURE(status))
379 goto out;
380 status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle);
381 if (ACPI_FAILURE(status))
382 goto out;
383 status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle);
384 if (ACPI_FAILURE(status))
385 goto out;
386
387out:
388 return status;
389}
390
391/* get optical driver power state */
392
393static int get_optd_power_state(void)
394{
395 acpi_status status;
396 unsigned long long state;
397 int result;
398
399 status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state);
400 if (ACPI_FAILURE(status)) {
401 pr_err("evaluation error _SB.STAT\n");
402 result = -EIO;
403 goto out;
404 }
405 switch (state) {
406 case 0: /* power off */
407 result = 0;
408 break;
409 case 0x0f: /* power on */
410 result = 1;
411 break;
412 default:
413 result = -EIO;
414 break;
415 }
416
417out:
418 return result;
419}
420
421/* set optical drive power state */
422
423static int set_optd_power_state(int new_state)
424{
425 int result;
426 acpi_status status;
427
428 result = get_optd_power_state();
429 if (result < 0)
430 goto out;
431 if (new_state == result)
432 goto out;
433
434 switch (new_state) {
435 case 0: /* power off */
436 /* Call CDDR instead, since they both call the same method
437 * while CDDI takes 1 arg and we are not quite sure what it is.
438 */
439 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL);
440 if (ACPI_FAILURE(status)) {
441 pr_err("evaluation error _SB.CDDR\n");
442 result = -EIO;
443 }
444 break;
445 case 1: /* power on */
446 status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL);
447 if (ACPI_FAILURE(status)) {
448 pr_err("evaluation error _SB.FBAY\n");
449 result = -EIO;
450 }
451 break;
452 default:
453 result = -EINVAL;
454 break;
455 }
456
457out:
458 return result;
459}
460
461
709ee531
HW		 462/* sysfs user interface functions */
463
80373ad0 464static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
709ee531
HW		 465 char *buf)
466{
467 struct acpi_device *acpi = to_acpi_device(dev);
468 struct pcc_acpi *pcc = acpi_driver_data(acpi);
469
e253fb94 470 if (!acpi_pcc_retrieve_biosdata(pcc))
709ee531
HW		 471 return -EIO;
472
ba256b41 473 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
709ee531
HW		 474}
475
80373ad0 476static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
709ee531
HW		 477 char *buf)
478{
479 struct acpi_device *acpi = to_acpi_device(dev);
480 struct pcc_acpi *pcc = acpi_driver_data(acpi);
481
e253fb94 482 if (!acpi_pcc_retrieve_biosdata(pcc))
709ee531
HW		 483 return -EIO;
484
ba256b41 485 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
709ee531
HW		 486}
487
80373ad0 488static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
709ee531
HW		 489 char *buf)
490{
491 struct acpi_device *acpi = to_acpi_device(dev);
492 struct pcc_acpi *pcc = acpi_driver_data(acpi);
493
e253fb94 494 if (!acpi_pcc_retrieve_biosdata(pcc))
709ee531
HW		 495 return -EIO;
496
ba256b41 497 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
709ee531
HW		 498}
499
e3a9afbb
KC		 500static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
501 const char *buf, size_t count)
502{
503 struct acpi_device *acpi = to_acpi_device(dev);
504 struct pcc_acpi *pcc = acpi_driver_data(acpi);
505 int err, val;
506
507 err = kstrtoint(buf, 0, &val);
508 if (err)
509 return err;
510 if (val == 0 || val == 1) {
511 acpi_pcc_write_sset(pcc, SINF_MUTE, val);
512 pcc->mute = val;
513 }
514
515 return count;
516}
517
80373ad0 518static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
709ee531
HW		 519 char *buf)
520{
521 struct acpi_device *acpi = to_acpi_device(dev);
522 struct pcc_acpi *pcc = acpi_driver_data(acpi);
523
e253fb94 524 if (!acpi_pcc_retrieve_biosdata(pcc))
709ee531
HW		 525 return -EIO;
526
00856351 527 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key);
709ee531
HW		 528}
529
80373ad0 530static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
709ee531
HW		 531 const char *buf, size_t count)
532{
533 struct acpi_device *acpi = to_acpi_device(dev);
534 struct pcc_acpi *pcc = acpi_driver_data(acpi);
00856351 535 int err, val;
709ee531 536
00856351
KC		 537 err = kstrtoint(buf, 0, &val);
538 if (err)
539 return err;
540 if (val == 0 || val == 1) {
709ee531 541 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
00856351 542 pcc->sticky_key = val;
709ee531
HW		 543 }
544
545 return count;
546}
547
468f96bf
KC		 548static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
549 char *buf)
550{
551 struct acpi_device *acpi = to_acpi_device(dev);
552 struct pcc_acpi *pcc = acpi_driver_data(acpi);
553 int result;
554
555 if (!acpi_pcc_retrieve_biosdata(pcc))
556 return -EIO;
557
558 switch (pcc->sinf[SINF_ECO_MODE]) {
559 case (ECO_MODE_OFF + 3):
560 result = 0;
561 break;
562 case (ECO_MODE_ON + 3):
563 result = 1;
564 break;
565 default:
566 result = -EIO;
567 break;
568 }
569 return snprintf(buf, PAGE_SIZE, "%u\n", result);
570}
571
572static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
573 const char *buf, size_t count)
574{
575 struct acpi_device *acpi = to_acpi_device(dev);
576 struct pcc_acpi *pcc = acpi_driver_data(acpi);
577 int err, state;
578
579 union acpi_object param[2];
580 struct acpi_object_list input;
581 acpi_status status;
582
583 param[0].type = ACPI_TYPE_INTEGER;
584 param[0].integer.value = 0x15;
585 param[1].type = ACPI_TYPE_INTEGER;
586 input.count = 2;
587 input.pointer = param;
588
589 err = kstrtoint(buf, 0, &state);
590 if (err)
591 return err;
592
593 switch (state) {
594 case 0:
595 param[1].integer.value = ECO_MODE_OFF;
596 pcc->sinf[SINF_ECO_MODE] = 0;
597 pcc->eco_mode = 0;
598 break;
599 case 1:
600 param[1].integer.value = ECO_MODE_ON;
601 pcc->sinf[SINF_ECO_MODE] = 1;
602 pcc->eco_mode = 1;
603 break;
604 default:
605 /* nothing to do */
606 return count;
607 }
608
609 status = acpi_evaluate_object(NULL, METHOD_ECWR,
610 &input, NULL);
611 if (ACPI_FAILURE(status)) {
612 pr_err("%s evaluation failed\n", METHOD_ECWR);
613 return -EINVAL;
614 }
615
616 return count;
617}
618
25dd390c
KC		 619static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr,
620 char *buf)
621{
622 struct acpi_device *acpi = to_acpi_device(dev);
623 struct pcc_acpi *pcc = acpi_driver_data(acpi);
624
625 if (!acpi_pcc_retrieve_biosdata(pcc))
626 return -EIO;
627
628 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
629}
630
631static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
632 const char *buf, size_t count)
633{
634 struct acpi_device *acpi = to_acpi_device(dev);
635 struct pcc_acpi *pcc = acpi_driver_data(acpi);
636 int err, val;
637
638 err = kstrtoint(buf, 0, &val);
639 if (err)
640 return err;
641 if (val >= 0 && val <= 255) {
642 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
643 pcc->ac_brightness = val;
644 }
645
646 return count;
647}
648
649static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr,
650 char *buf)
651{
652 struct acpi_device *acpi = to_acpi_device(dev);
653 struct pcc_acpi *pcc = acpi_driver_data(acpi);
654
655 if (!acpi_pcc_retrieve_biosdata(pcc))
656 return -EIO;
657
658 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
659}
660
661static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
662 const char *buf, size_t count)
663{
664 struct acpi_device *acpi = to_acpi_device(dev);
665 struct pcc_acpi *pcc = acpi_driver_data(acpi);
666 int err, val;
667
668 err = kstrtoint(buf, 0, &val);
669 if (err)
670 return err;
671 if (val >= 0 && val <= 255) {
672 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);
673 pcc->dc_brightness = val;
674 }
675
676 return count;
677}
678
679static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr,
680 char *buf)
681{
682 struct acpi_device *acpi = to_acpi_device(dev);
683 struct pcc_acpi *pcc = acpi_driver_data(acpi);
684
685 if (!acpi_pcc_retrieve_biosdata(pcc))
686 return -EIO;
687
688 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
689}
690
691static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
692 const char *buf, size_t count)
693{
694 struct acpi_device *acpi = to_acpi_device(dev);
695 struct pcc_acpi *pcc = acpi_driver_data(acpi);
696 int err, val;
697
698 err = kstrtoint(buf, 0, &val);
699 if (err)
700 return err;
701
702 if (val >= 0 && val <= 255) {
703 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);
704 pcc->current_brightness = val;
705 }
706
707 return count;
708}
709
d5a81d8e
KC		 710static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
711 char *buf)
712{
713 return snprintf(buf, PAGE_SIZE, "%d\n", get_optd_power_state());
714}
715
716static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
717 const char *buf, size_t count)
718{
719 int err, val;
720
721 err = kstrtoint(buf, 10, &val);
722 if (err)
723 return err;
724 set_optd_power_state(val);
725 return count;
726}
727
80373ad0
KC		 728static DEVICE_ATTR_RO(numbatt);
729static DEVICE_ATTR_RO(lcdtype);
e3a9afbb 730static DEVICE_ATTR_RW(mute);
80373ad0 731static DEVICE_ATTR_RW(sticky_key);
468f96bf 732static DEVICE_ATTR_RW(eco_mode);
25dd390c
KC		 733static DEVICE_ATTR_RW(ac_brightness);
734static DEVICE_ATTR_RW(dc_brightness);
735static DEVICE_ATTR_RW(current_brightness);
d5a81d8e 736static DEVICE_ATTR_RW(cdpower);
709ee531
HW		 737
738static struct attribute *pcc_sysfs_entries[] = {
739 &dev_attr_numbatt.attr,
740 &dev_attr_lcdtype.attr,
741 &dev_attr_mute.attr,
742 &dev_attr_sticky_key.attr,
468f96bf 743 &dev_attr_eco_mode.attr,
25dd390c
KC		 744 &dev_attr_ac_brightness.attr,
745 &dev_attr_dc_brightness.attr,
746 &dev_attr_current_brightness.attr,
d5a81d8e 747 &dev_attr_cdpower.attr,
709ee531
HW		 748 NULL,
749};
750
24f58405 751static const struct attribute_group pcc_attr_group = {
709ee531
HW		 752 .name = NULL, /* put in device directory */
753 .attrs = pcc_sysfs_entries,
754};
755
756
757/* hotkey input device driver */
758
58c68865 759static int sleep_keydown_seen;
709ee531
HW		 760static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
761{
762 struct input_dev *hotk_input_dev = pcc->input_dev;
763 int rc;
3e2dab9a 764 unsigned long long result;
9a516f37
SS		 765 unsigned int key;
766 unsigned int updown;
709ee531 767
709ee531
HW		 768 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
769 NULL, &result);
3526ecad 770 if (ACPI_FAILURE(rc)) {
f1aaf914 771 pr_err("error getting hotkey status\n");
709ee531
HW		 772 return;
773 }
58c68865 774
9a516f37
SS		 775 key = result & 0xf;
776 updown = result & 0x80; /* 0x80 == key down; 0x00 = key up */
777
58c68865 778 /* hack: some firmware sends no key down for sleep / hibernate */
9a516f37
SS		 779 if (key == 7 || key == 10) {
780 if (updown)
58c68865
SS		 781 sleep_keydown_seen = 1;
782 if (!sleep_keydown_seen)
783 sparse_keymap_report_event(hotk_input_dev,
9a516f37 784 key, 0x80, false);
58c68865
SS		 785 }
786
e516ce9b
HG		 787 /*
788 * Don't report brightness key-presses if they are also reported
789 * by the ACPI video bus.
790 */
791 if ((key == 1 || key == 2) && acpi_video_handles_brightness_key_presses())
792 return;
793
1a91660c
HG		 794 if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false))
795 pr_err("Unknown hotkey event: 0x%04llx\n", result);
709ee531
HW		 796}
797
cddd1f71 798static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
709ee531 799{
cddd1f71 800 struct pcc_acpi *pcc = acpi_driver_data(device);
709ee531 801
709ee531
HW		 802 switch (event) {
803 case HKEY_NOTIFY:
804 acpi_pcc_generate_keyinput(pcc);
805 break;
806 default:
807 /* nothing to do */
808 break;
809 }
810}
811
d5a81d8e
KC		 812static void pcc_optd_notify(acpi_handle handle, u32 event, void *data)
813{
814 if (event != ACPI_NOTIFY_EJECT_REQUEST)
815 return;
816
817 set_optd_power_state(0);
818}
819
820static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)
821{
822 acpi_status status;
823 acpi_handle handle;
824
825 status = acpi_get_handle(NULL, node, &handle);
826
827 if (ACPI_SUCCESS(status)) {
828 status = acpi_install_notify_handler(handle,
829 ACPI_SYSTEM_NOTIFY,
830 pcc_optd_notify, pcc);
831 if (ACPI_FAILURE(status))
832 pr_err("Failed to register notify on %s\n", node);
833 } else
834 return -ENODEV;
835
836 return 0;
837}
838
839static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)
840{
841 acpi_status status = AE_OK;
842 acpi_handle handle;
843
844 status = acpi_get_handle(NULL, node, &handle);
845
846 if (ACPI_SUCCESS(status)) {
847 status = acpi_remove_notify_handler(handle,
848 ACPI_SYSTEM_NOTIFY,
849 pcc_optd_notify);
850 if (ACPI_FAILURE(status))
851 pr_err("Error removing optd notify handler %s\n",
852 node);
853 }
854}
855
709ee531
HW		 856static int acpi_pcc_init_input(struct pcc_acpi *pcc)
857{
1a765cac
DT		 858 struct input_dev *input_dev;
859 int error;
709ee531 860
1a765cac 861 input_dev = input_allocate_device();
b222cca6 862 if (!input_dev)
709ee531 863 return -ENOMEM;
709ee531 864
1a765cac
DT		 865 input_dev->name = ACPI_PCC_DRIVER_NAME;
866 input_dev->phys = ACPI_PCC_INPUT_PHYS;
867 input_dev->id.bustype = BUS_HOST;
868 input_dev->id.vendor = 0x0001;
869 input_dev->id.product = 0x0001;
870 input_dev->id.version = 0x0100;
709ee531 871
1a765cac
DT		 872 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
873 if (error) {
f1aaf914 874 pr_err("Unable to setup input device keymap\n");
1a765cac
DT		 875 goto err_free_dev;
876 }
709ee531 877
1a765cac
DT		 878 error = input_register_device(input_dev);
879 if (error) {
f1aaf914 880 pr_err("Unable to register input device\n");
b09b9195 881 goto err_free_dev;
1a765cac 882 }
709ee531 883
1a765cac
DT		 884 pcc->input_dev = input_dev;
885 return 0;
709ee531 886
1a765cac
DT		 887 err_free_dev:
888 input_free_device(input_dev);
889 return error;
890}
709ee531 891
709ee531
HW		 892/* kernel module interface */
893
3567a4e2 894#ifdef CONFIG_PM_SLEEP
a7377419 895static int acpi_pcc_hotkey_resume(struct device *dev)
709ee531 896{
a7377419
RW		 897 struct pcc_acpi *pcc;
898
899 if (!dev)
900 return -EINVAL;
709ee531 901
a7377419
RW		 902 pcc = acpi_driver_data(to_acpi_device(dev));
903 if (!pcc)
709ee531
HW		 904 return -EINVAL;
905
e3a9afbb 906 acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
468f96bf 907 acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
00856351 908 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
25dd390c
KC		 909 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);
910 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);
911 acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);
00856351
KC		 912
913 return 0;
709ee531 914}
3567a4e2 915#endif
709ee531
HW		 916
917static int acpi_pcc_hotkey_add(struct acpi_device *device)
918{
a19a6ee6 919 struct backlight_properties props;
709ee531
HW		 920 struct pcc_acpi *pcc;
921 int num_sifr, result;
922
709ee531
HW		 923 if (!device)
924 return -EINVAL;
925
926 num_sifr = acpi_pcc_get_sqty(device);
927
e424fb8c 928 if (num_sifr < 0 || num_sifr > 255) {
f1aaf914 929 pr_err("num_sifr out of range");
709ee531
HW		 930 return -ENODEV;
931 }
932
933 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
934 if (!pcc) {
f1aaf914 935 pr_err("Couldn't allocate mem for pcc");
709ee531
HW		 936 return -ENOMEM;
937 }
938
6396bb22 939 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
709ee531
HW		 940 if (!pcc->sinf) {
941 result = -ENOMEM;
942 goto out_hotkey;
943 }
944
945 pcc->device = device;
946 pcc->handle = device->handle;
947 pcc->num_sifr = num_sifr;
3e2dab9a 948 device->driver_data = pcc;
709ee531
HW		 949 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
950 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
951
952 result = acpi_pcc_init_input(pcc);
953 if (result) {
f1aaf914 954 pr_err("Error installing keyinput handler\n");
1a765cac 955 goto out_sinf;
709ee531
HW		 956 }
957
e253fb94 958 if (!acpi_pcc_retrieve_biosdata(pcc)) {
aa13857f 959 result = -EIO;
f1aaf914 960 pr_err("Couldn't retrieve BIOS data\n");
a19a6ee6 961 goto out_input;
709ee531 962 }
a19a6ee6
MG		 963 /* initialize backlight */
964 memset(&props, 0, sizeof(struct backlight_properties));
bb7ca747 965 props.type = BACKLIGHT_PLATFORM;
a19a6ee6
MG		 966 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
967 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
968 &pcc_backlight_ops, &props);
ec57af9c
BP		 969 if (IS_ERR(pcc->backlight)) {
970 result = PTR_ERR(pcc->backlight);
1a765cac 971 goto out_input;
ec57af9c 972 }
709ee531
HW		 973
974 /* read the initial brightness setting from the hardware */
709ee531
HW		 975 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
976
00856351
KC		 977 /* Reset initial sticky key mode since the hardware register state is not consistent */
978 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);
979 pcc->sticky_key = 0;
709ee531 980
468f96bf 981 pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
e3a9afbb 982 pcc->mute = pcc->sinf[SINF_MUTE];
25dd390c
KC		 983 pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
984 pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
f1fba086 985 pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
e3a9afbb 986
709ee531
HW		 987 /* add sysfs attributes */
988 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
989 if (result)
990 goto out_backlight;
991
d5a81d8e
KC		 992 /* optical drive initialization */
993 if (ACPI_SUCCESS(check_optd_present())) {
994 pcc->platform = platform_device_register_simple("panasonic",
995 -1, NULL, 0);
996 if (IS_ERR(pcc->platform)) {
997 result = PTR_ERR(pcc->platform);
998 goto out_backlight;
999 }
1000 result = device_create_file(&pcc->platform->dev,
1001 &dev_attr_cdpower);
1002 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1003 if (result)
1004 goto out_platform;
1005 } else {
1006 pcc->platform = NULL;
1007 }
1008
709ee531
HW		 1009 return 0;
1010
d5a81d8e
KC		 1011out_platform:
1012 platform_device_unregister(pcc->platform);
709ee531
HW		 1013out_backlight:
1014 backlight_device_unregister(pcc->backlight);
1a765cac 1015out_input:
b09b9195 1016 input_unregister_device(pcc->input_dev);
a19a6ee6
MG		 1017out_sinf:
1018 kfree(pcc->sinf);
709ee531
HW		 1019out_hotkey:
1020 kfree(pcc);
1021
1022 return result;
1023}
1024
51fac838 1025static int acpi_pcc_hotkey_remove(struct acpi_device *device)
709ee531
HW		 1026{
1027 struct pcc_acpi *pcc = acpi_driver_data(device);
1028
709ee531
HW		 1029 if (!device || !pcc)
1030 return -EINVAL;
1031
d5a81d8e
KC		 1032 if (pcc->platform) {
1033 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);
1034 platform_device_unregister(pcc->platform);
1035 }
1036 pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1037
709ee531
HW		 1038 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1039
1040 backlight_device_unregister(pcc->backlight);
1041
b09b9195 1042 input_unregister_device(pcc->input_dev);
709ee531
HW		 1043
1044 kfree(pcc->sinf);
1045 kfree(pcc);
1046
1047 return 0;
1048}
1049
5c07eae9 1050module_acpi_driver(acpi_pcc_driver);
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