]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - drivers/platform/x86/panasonic-laptop.c
projects / mirror_ubuntu-jammy-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
platform/x86: panasonic-laptop: don't report duplicate brightness key-presses
[mirror_ubuntu-jammy-kernel.git] / drivers / platform / x86 / panasonic-laptop.c
1 // SPDX-License-Identifier: GPL-2.0-only
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 *
12 *---------------------------------------------------------------------------
13 *
14 * ChangeLog:
15 * Aug.18, 2020 Kenneth Chan <kenneth.t.chan@gmail.com>
16 * -v0.98 add platform devices for firmware brightness registers
17 * add support for battery charging threshold (eco mode)
18 * resolve hotkey double trigger
19 * add write support to mute
20 * fix sticky_key init bug
21 * fix naming of platform files for consistency with other
22 * modules
23 * split MODULE_AUTHOR() by one author per macro call
24 * replace ACPI prints with pr_*() macros
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 *
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
120 */
121
122 #include <linux/acpi.h>
123 #include <linux/backlight.h>
124 #include <linux/ctype.h>
125 #include <linux/init.h>
126 #include <linux/input.h>
127 #include <linux/input/sparse-keymap.h>
128 #include <linux/kernel.h>
129 #include <linux/module.h>
130 #include <linux/platform_device.h>
131 #include <linux/seq_file.h>
132 #include <linux/slab.h>
133 #include <linux/types.h>
134 #include <linux/uaccess.h>
135 #include <acpi/video.h>
136
137 MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
138 MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>");
139 MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
140 MODULE_AUTHOR("Martin Lucina <mato@kotelna.sk>");
141 MODULE_AUTHOR("Kenneth Chan <kenneth.t.chan@gmail.com>");
142 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
143 MODULE_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"
153 #define METHOD_ECWR "\\_SB.ECWR"
154 #define HKEY_NOTIFY 0x80
155 #define ECO_MODE_OFF 0x00
156 #define ECO_MODE_ON 0x80
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
165 ECO_MODEs: 0x03 = off, 0x83 = on
166 */
167 enum 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,
177 SINF_ECO_MODE = 0x0A,
178 SINF_CUR_BRIGHT = 0x0D,
179 SINF_STICKY_KEY = 0x80,
180 };
181 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
182
183 static int acpi_pcc_hotkey_add(struct acpi_device *device);
184 static int acpi_pcc_hotkey_remove(struct acpi_device *device);
185 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
186
187 static const struct acpi_device_id pcc_device_ids[] = {
188 { "MAT0012", 0},
189 { "MAT0013", 0},
190 { "MAT0018", 0},
191 { "MAT0019", 0},
192 { "", 0},
193 };
194 MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
195
196 #ifdef CONFIG_PM_SLEEP
197 static int acpi_pcc_hotkey_resume(struct device *dev);
198 #endif
199 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
200
201 static 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,
208 .notify = acpi_pcc_hotkey_notify,
209 },
210 .drv.pm = &acpi_pcc_hotkey_pm,
211 };
212
213 static 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 }
226 };
227
228 struct pcc_acpi {
229 acpi_handle handle;
230 unsigned long num_sifr;
231 int sticky_key;
232 int eco_mode;
233 int mute;
234 int ac_brightness;
235 int dc_brightness;
236 int current_brightness;
237 u32 *sinf;
238 struct acpi_device *device;
239 struct input_dev *input_dev;
240 struct backlight_device *backlight;
241 struct platform_device *platform;
242 };
243
244 /* method access functions */
245 static 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
259 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
260 &params, NULL);
261
262 return (status == AE_OK) ? 0 : -EIO;
263 }
264
265 static inline int acpi_pcc_get_sqty(struct acpi_device *device)
266 {
267 unsigned long long s;
268 acpi_status status;
269
270 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
271 NULL, &s);
272 if (ACPI_SUCCESS(status))
273 return s;
274 else {
275 pr_err("evaluation error HKEY.SQTY\n");
276 return -EINVAL;
277 }
278 }
279
280 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
281 {
282 acpi_status status;
283 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
284 union acpi_object *hkey = NULL;
285 int i;
286
287 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
288 &buffer);
289 if (ACPI_FAILURE(status)) {
290 pr_err("evaluation error HKEY.SINF\n");
291 return 0;
292 }
293
294 hkey = buffer.pointer;
295 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
296 pr_err("Invalid HKEY.SINF\n");
297 status = AE_ERROR;
298 goto end;
299 }
300
301 if (pcc->num_sifr < hkey->package.count) {
302 pr_err("SQTY reports bad SINF length\n");
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)) {
310 pcc->sinf[i] = element->integer.value;
311 } else
312 pr_err("Invalid HKEY.SINF data\n");
313 }
314 pcc->sinf[hkey->package.count] = -1;
315
316 end:
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
328 static int bl_get(struct backlight_device *bd)
329 {
330 struct pcc_acpi *pcc = bl_get_data(bd);
331
332 if (!acpi_pcc_retrieve_biosdata(pcc))
333 return -EIO;
334
335 return pcc->sinf[SINF_AC_CUR_BRIGHT];
336 }
337
338 static 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
344 if (!acpi_pcc_retrieve_biosdata(pcc))
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
364 static const struct backlight_ops pcc_backlight_ops = {
365 .get_brightness = bl_get,
366 .update_status = bl_set_status,
367 };
368
369
370 /* returns ACPI_SUCCESS if methods to control optical drive are present */
371
372 static 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
387 out:
388 return status;
389 }
390
391 /* get optical driver power state */
392
393 static 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
417 out:
418 return result;
419 }
420
421 /* set optical drive power state */
422
423 static 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
457 out:
458 return result;
459 }
460
461
462 /* sysfs user interface functions */
463
464 static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
465 char *buf)
466 {
467 struct acpi_device *acpi = to_acpi_device(dev);
468 struct pcc_acpi *pcc = acpi_driver_data(acpi);
469
470 if (!acpi_pcc_retrieve_biosdata(pcc))
471 return -EIO;
472
473 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
474 }
475
476 static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
477 char *buf)
478 {
479 struct acpi_device *acpi = to_acpi_device(dev);
480 struct pcc_acpi *pcc = acpi_driver_data(acpi);
481
482 if (!acpi_pcc_retrieve_biosdata(pcc))
483 return -EIO;
484
485 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
486 }
487
488 static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
489 char *buf)
490 {
491 struct acpi_device *acpi = to_acpi_device(dev);
492 struct pcc_acpi *pcc = acpi_driver_data(acpi);
493
494 if (!acpi_pcc_retrieve_biosdata(pcc))
495 return -EIO;
496
497 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
498 }
499
500 static 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
518 static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
519 char *buf)
520 {
521 struct acpi_device *acpi = to_acpi_device(dev);
522 struct pcc_acpi *pcc = acpi_driver_data(acpi);
523
524 if (!acpi_pcc_retrieve_biosdata(pcc))
525 return -EIO;
526
527 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key);
528 }
529
530 static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
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);
535 int err, val;
536
537 err = kstrtoint(buf, 0, &val);
538 if (err)
539 return err;
540 if (val == 0 || val == 1) {
541 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
542 pcc->sticky_key = val;
543 }
544
545 return count;
546 }
547
548 static 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
572 static 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
619 static 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
631 static 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
649 static 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
661 static 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
679 static 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
691 static 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
710 static 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
716 static 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
728 static DEVICE_ATTR_RO(numbatt);
729 static DEVICE_ATTR_RO(lcdtype);
730 static DEVICE_ATTR_RW(mute);
731 static DEVICE_ATTR_RW(sticky_key);
732 static DEVICE_ATTR_RW(eco_mode);
733 static DEVICE_ATTR_RW(ac_brightness);
734 static DEVICE_ATTR_RW(dc_brightness);
735 static DEVICE_ATTR_RW(current_brightness);
736 static DEVICE_ATTR_RW(cdpower);
737
738 static 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,
743 &dev_attr_eco_mode.attr,
744 &dev_attr_ac_brightness.attr,
745 &dev_attr_dc_brightness.attr,
746 &dev_attr_current_brightness.attr,
747 &dev_attr_cdpower.attr,
748 NULL,
749 };
750
751 static const struct attribute_group pcc_attr_group = {
752 .name = NULL, /* put in device directory */
753 .attrs = pcc_sysfs_entries,
754 };
755
756
757 /* hotkey input device driver */
758
759 static int sleep_keydown_seen;
760 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
761 {
762 struct input_dev *hotk_input_dev = pcc->input_dev;
763 int rc;
764 unsigned long long result;
765 unsigned int key;
766 unsigned int updown;
767
768 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
769 NULL, &result);
770 if (ACPI_FAILURE(rc)) {
771 pr_err("error getting hotkey status\n");
772 return;
773 }
774
775 key = result & 0xf;
776 updown = result & 0x80; /* 0x80 == key down; 0x00 = key up */
777
778 /* hack: some firmware sends no key down for sleep / hibernate */
779 if (key == 7 || key == 10) {
780 if (updown)
781 sleep_keydown_seen = 1;
782 if (!sleep_keydown_seen)
783 sparse_keymap_report_event(hotk_input_dev,
784 key, 0x80, false);
785 }
786
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
794 if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false))
795 pr_err("Unknown hotkey event: 0x%04llx\n", result);
796 }
797
798 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
799 {
800 struct pcc_acpi *pcc = acpi_driver_data(device);
801
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
812 static 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
820 static 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
839 static 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
856 static int acpi_pcc_init_input(struct pcc_acpi *pcc)
857 {
858 struct input_dev *input_dev;
859 int error;
860
861 input_dev = input_allocate_device();
862 if (!input_dev)
863 return -ENOMEM;
864
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;
871
872 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
873 if (error) {
874 pr_err("Unable to setup input device keymap\n");
875 goto err_free_dev;
876 }
877
878 error = input_register_device(input_dev);
879 if (error) {
880 pr_err("Unable to register input device\n");
881 goto err_free_dev;
882 }
883
884 pcc->input_dev = input_dev;
885 return 0;
886
887 err_free_dev:
888 input_free_device(input_dev);
889 return error;
890 }
891
892 /* kernel module interface */
893
894 #ifdef CONFIG_PM_SLEEP
895 static int acpi_pcc_hotkey_resume(struct device *dev)
896 {
897 struct pcc_acpi *pcc;
898
899 if (!dev)
900 return -EINVAL;
901
902 pcc = acpi_driver_data(to_acpi_device(dev));
903 if (!pcc)
904 return -EINVAL;
905
906 acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
907 acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
908 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
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);
912
913 return 0;
914 }
915 #endif
916
917 static int acpi_pcc_hotkey_add(struct acpi_device *device)
918 {
919 struct backlight_properties props;
920 struct pcc_acpi *pcc;
921 int num_sifr, result;
922
923 if (!device)
924 return -EINVAL;
925
926 num_sifr = acpi_pcc_get_sqty(device);
927
928 if (num_sifr < 0 || num_sifr > 255) {
929 pr_err("num_sifr out of range");
930 return -ENODEV;
931 }
932
933 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
934 if (!pcc) {
935 pr_err("Couldn't allocate mem for pcc");
936 return -ENOMEM;
937 }
938
939 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
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;
948 device->driver_data = pcc;
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) {
954 pr_err("Error installing keyinput handler\n");
955 goto out_sinf;
956 }
957
958 if (!acpi_pcc_retrieve_biosdata(pcc)) {
959 result = -EIO;
960 pr_err("Couldn't retrieve BIOS data\n");
961 goto out_input;
962 }
963 /* initialize backlight */
964 memset(&props, 0, sizeof(struct backlight_properties));
965 props.type = BACKLIGHT_PLATFORM;
966 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
967 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
968 &pcc_backlight_ops, &props);
969 if (IS_ERR(pcc->backlight)) {
970 result = PTR_ERR(pcc->backlight);
971 goto out_input;
972 }
973
974 /* read the initial brightness setting from the hardware */
975 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
976
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;
980
981 pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
982 pcc->mute = pcc->sinf[SINF_MUTE];
983 pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
984 pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
985 pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
986
987 /* add sysfs attributes */
988 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
989 if (result)
990 goto out_backlight;
991
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
1009 return 0;
1010
1011 out_platform:
1012 platform_device_unregister(pcc->platform);
1013 out_backlight:
1014 backlight_device_unregister(pcc->backlight);
1015 out_input:
1016 input_unregister_device(pcc->input_dev);
1017 out_sinf:
1018 kfree(pcc->sinf);
1019 out_hotkey:
1020 kfree(pcc);
1021
1022 return result;
1023 }
1024
1025 static int acpi_pcc_hotkey_remove(struct acpi_device *device)
1026 {
1027 struct pcc_acpi *pcc = acpi_driver_data(device);
1028
1029 if (!device || !pcc)
1030 return -EINVAL;
1031
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
1038 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1039
1040 backlight_device_unregister(pcc->backlight);
1041
1042 input_unregister_device(pcc->input_dev);
1043
1044 kfree(pcc->sinf);
1045 kfree(pcc);
1046
1047 return 0;
1048 }
1049
1050 module_acpi_driver(acpi_pcc_driver);
Ubuntu Jammy Linux kernel mirror