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/bits.h>
125 #include <linux/ctype.h>
126 #include <linux/i8042.h>
127 #include <linux/init.h>
128 #include <linux/input.h>
129 #include <linux/input/sparse-keymap.h>
130 #include <linux/kernel.h>
131 #include <linux/module.h>
132 #include <linux/platform_device.h>
133 #include <linux/seq_file.h>
134 #include <linux/serio.h>
135 #include <linux/slab.h>
136 #include <linux/types.h>
137 #include <linux/uaccess.h>
138 #include <acpi/video.h>
139
140 MODULE_AUTHOR("Hiroshi Miura <miura@da-cha.org>");
141 MODULE_AUTHOR("David Bronaugh <dbronaugh@linuxboxen.org>");
142 MODULE_AUTHOR("Harald Welte <laforge@gnumonks.org>");
143 MODULE_AUTHOR("Martin Lucina <mato@kotelna.sk>");
144 MODULE_AUTHOR("Kenneth Chan <kenneth.t.chan@gmail.com>");
145 MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops");
146 MODULE_LICENSE("GPL");
147
148 #define LOGPREFIX "pcc_acpi: "
149
150 /* Define ACPI PATHs */
151 /* Lets note hotkeys */
152 #define METHOD_HKEY_QUERY "HINF"
153 #define METHOD_HKEY_SQTY "SQTY"
154 #define METHOD_HKEY_SINF "SINF"
155 #define METHOD_HKEY_SSET "SSET"
156 #define METHOD_ECWR "\\_SB.ECWR"
157 #define HKEY_NOTIFY 0x80
158 #define ECO_MODE_OFF 0x00
159 #define ECO_MODE_ON 0x80
160
161 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
162 #define ACPI_PCC_DEVICE_NAME "Hotkey"
163 #define ACPI_PCC_CLASS "pcc"
164
165 #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
166
167 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
168 ECO_MODEs: 0x03 = off, 0x83 = on
169 */
170 enum SINF_BITS { SINF_NUM_BATTERIES = 0,
171 SINF_LCD_TYPE,
172 SINF_AC_MAX_BRIGHT,
173 SINF_AC_MIN_BRIGHT,
174 SINF_AC_CUR_BRIGHT,
175 SINF_DC_MAX_BRIGHT,
176 SINF_DC_MIN_BRIGHT,
177 SINF_DC_CUR_BRIGHT,
178 SINF_MUTE,
179 SINF_RESERVED,
180 SINF_ECO_MODE = 0x0A,
181 SINF_CUR_BRIGHT = 0x0D,
182 SINF_STICKY_KEY = 0x80,
183 };
184 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
185
186 static int acpi_pcc_hotkey_add(struct acpi_device *device);
187 static void acpi_pcc_hotkey_remove(struct acpi_device *device);
188 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);
189
190 static const struct acpi_device_id pcc_device_ids[] = {
191 { "MAT0012", 0},
192 { "MAT0013", 0},
193 { "MAT0018", 0},
194 { "MAT0019", 0},
195 { "", 0},
196 };
197 MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
198
199 #ifdef CONFIG_PM_SLEEP
200 static int acpi_pcc_hotkey_resume(struct device *dev);
201 #endif
202 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
203
204 static struct acpi_driver acpi_pcc_driver = {
205 .name = ACPI_PCC_DRIVER_NAME,
206 .class = ACPI_PCC_CLASS,
207 .ids = pcc_device_ids,
208 .ops = {
209 .add = acpi_pcc_hotkey_add,
210 .remove = acpi_pcc_hotkey_remove,
211 .notify = acpi_pcc_hotkey_notify,
212 },
213 .drv.pm = &acpi_pcc_hotkey_pm,
214 };
215
216 static const struct key_entry panasonic_keymap[] = {
217 { KE_KEY, 0, { KEY_RESERVED } },
218 { KE_KEY, 1, { KEY_BRIGHTNESSDOWN } },
219 { KE_KEY, 2, { KEY_BRIGHTNESSUP } },
220 { KE_KEY, 3, { KEY_DISPLAYTOGGLE } },
221 { KE_KEY, 4, { KEY_MUTE } },
222 { KE_KEY, 5, { KEY_VOLUMEDOWN } },
223 { KE_KEY, 6, { KEY_VOLUMEUP } },
224 { KE_KEY, 7, { KEY_SLEEP } },
225 { KE_KEY, 8, { KEY_PROG1 } }, /* Change CPU boost */
226 { KE_KEY, 9, { KEY_BATTERY } },
227 { KE_KEY, 10, { KEY_SUSPEND } },
228 { KE_KEY, 21, { KEY_MACRO1 } },
229 { KE_KEY, 22, { KEY_MACRO2 } },
230 { KE_KEY, 24, { KEY_MACRO3 } },
231 { KE_KEY, 25, { KEY_MACRO4 } },
232 { KE_KEY, 34, { KEY_MACRO5 } },
233 { KE_KEY, 35, { KEY_MACRO6 } },
234 { KE_KEY, 36, { KEY_MACRO7 } },
235 { KE_KEY, 37, { KEY_MACRO8 } },
236 { KE_KEY, 41, { KEY_MACRO9 } },
237 { KE_KEY, 42, { KEY_MACRO10 } },
238 { KE_KEY, 43, { KEY_MACRO11 } },
239 { KE_END, 0 }
240 };
241
242 struct pcc_acpi {
243 acpi_handle handle;
244 unsigned long num_sifr;
245 int sticky_key;
246 int eco_mode;
247 int mute;
248 int ac_brightness;
249 int dc_brightness;
250 int current_brightness;
251 u32 *sinf;
252 struct acpi_device *device;
253 struct input_dev *input_dev;
254 struct backlight_device *backlight;
255 struct platform_device *platform;
256 };
257
258 /*
259 * On some Panasonic models the volume up / down / mute keys send duplicate
260 * keypress events over the PS/2 kbd interface, filter these out.
261 */
panasonic_i8042_filter(unsigned char data,unsigned char str,struct serio * port)262 static bool panasonic_i8042_filter(unsigned char data, unsigned char str,
263 struct serio *port)
264 {
265 static bool extended;
266
267 if (str & I8042_STR_AUXDATA)
268 return false;
269
270 if (data == 0xe0) {
271 extended = true;
272 return true;
273 } else if (extended) {
274 extended = false;
275
276 switch (data & 0x7f) {
277 case 0x20: /* e0 20 / e0 a0, Volume Mute press / release */
278 case 0x2e: /* e0 2e / e0 ae, Volume Down press / release */
279 case 0x30: /* e0 30 / e0 b0, Volume Up press / release */
280 return true;
281 default:
282 /*
283 * Report the previously filtered e0 before continuing
284 * with the next non-filtered byte.
285 */
286 serio_interrupt(port, 0xe0, 0);
287 return false;
288 }
289 }
290
291 return false;
292 }
293
294 /* method access functions */
acpi_pcc_write_sset(struct pcc_acpi * pcc,int func,int val)295 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
296 {
297 union acpi_object in_objs[] = {
298 { .integer.type = ACPI_TYPE_INTEGER,
299 .integer.value = func, },
300 { .integer.type = ACPI_TYPE_INTEGER,
301 .integer.value = val, },
302 };
303 struct acpi_object_list params = {
304 .count = ARRAY_SIZE(in_objs),
305 .pointer = in_objs,
306 };
307 acpi_status status = AE_OK;
308
309 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
310 ¶ms, NULL);
311
312 return (status == AE_OK) ? 0 : -EIO;
313 }
314
acpi_pcc_get_sqty(struct acpi_device * device)315 static inline int acpi_pcc_get_sqty(struct acpi_device *device)
316 {
317 unsigned long long s;
318 acpi_status status;
319
320 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
321 NULL, &s);
322 if (ACPI_SUCCESS(status))
323 return s;
324 else {
325 pr_err("evaluation error HKEY.SQTY\n");
326 return -EINVAL;
327 }
328 }
329
acpi_pcc_retrieve_biosdata(struct pcc_acpi * pcc)330 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
331 {
332 acpi_status status;
333 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
334 union acpi_object *hkey = NULL;
335 int i;
336
337 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
338 &buffer);
339 if (ACPI_FAILURE(status)) {
340 pr_err("evaluation error HKEY.SINF\n");
341 return 0;
342 }
343
344 hkey = buffer.pointer;
345 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
346 pr_err("Invalid HKEY.SINF\n");
347 status = AE_ERROR;
348 goto end;
349 }
350
351 if (pcc->num_sifr < hkey->package.count) {
352 pr_err("SQTY reports bad SINF length SQTY: %lu SINF-pkg-count: %u\n",
353 pcc->num_sifr, hkey->package.count);
354 status = AE_ERROR;
355 goto end;
356 }
357
358 for (i = 0; i < hkey->package.count; i++) {
359 union acpi_object *element = &(hkey->package.elements[i]);
360 if (likely(element->type == ACPI_TYPE_INTEGER)) {
361 pcc->sinf[i] = element->integer.value;
362 } else
363 pr_err("Invalid HKEY.SINF data\n");
364 }
365 pcc->sinf[hkey->package.count] = -1;
366
367 end:
368 kfree(buffer.pointer);
369 return status == AE_OK;
370 }
371
372 /* backlight API interface functions */
373
374 /* This driver currently treats AC and DC brightness identical,
375 * since we don't need to invent an interface to the core ACPI
376 * logic to receive events in case a power supply is plugged in
377 * or removed */
378
bl_get(struct backlight_device * bd)379 static int bl_get(struct backlight_device *bd)
380 {
381 struct pcc_acpi *pcc = bl_get_data(bd);
382
383 if (!acpi_pcc_retrieve_biosdata(pcc))
384 return -EIO;
385
386 return pcc->sinf[SINF_AC_CUR_BRIGHT];
387 }
388
bl_set_status(struct backlight_device * bd)389 static int bl_set_status(struct backlight_device *bd)
390 {
391 struct pcc_acpi *pcc = bl_get_data(bd);
392 int bright = bd->props.brightness;
393 int rc;
394
395 if (!acpi_pcc_retrieve_biosdata(pcc))
396 return -EIO;
397
398 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
399 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
400
401 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
402 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
403
404 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
405 bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
406 return -EINVAL;
407
408 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
409 if (rc < 0)
410 return rc;
411
412 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
413 }
414
415 static const struct backlight_ops pcc_backlight_ops = {
416 .get_brightness = bl_get,
417 .update_status = bl_set_status,
418 };
419
420
421 /* returns ACPI_SUCCESS if methods to control optical drive are present */
422
check_optd_present(void)423 static acpi_status check_optd_present(void)
424 {
425 acpi_status status = AE_OK;
426 acpi_handle handle;
427
428 status = acpi_get_handle(NULL, "\\_SB.STAT", &handle);
429 if (ACPI_FAILURE(status))
430 goto out;
431 status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle);
432 if (ACPI_FAILURE(status))
433 goto out;
434 status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle);
435 if (ACPI_FAILURE(status))
436 goto out;
437
438 out:
439 return status;
440 }
441
442 /* get optical driver power state */
443
get_optd_power_state(void)444 static int get_optd_power_state(void)
445 {
446 acpi_status status;
447 unsigned long long state;
448 int result;
449
450 status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state);
451 if (ACPI_FAILURE(status)) {
452 pr_err("evaluation error _SB.STAT\n");
453 result = -EIO;
454 goto out;
455 }
456 switch (state) {
457 case 0: /* power off */
458 result = 0;
459 break;
460 case 0x0f: /* power on */
461 result = 1;
462 break;
463 default:
464 result = -EIO;
465 break;
466 }
467
468 out:
469 return result;
470 }
471
472 /* set optical drive power state */
473
set_optd_power_state(int new_state)474 static int set_optd_power_state(int new_state)
475 {
476 int result;
477 acpi_status status;
478
479 result = get_optd_power_state();
480 if (result < 0)
481 goto out;
482 if (new_state == result)
483 goto out;
484
485 switch (new_state) {
486 case 0: /* power off */
487 /* Call CDDR instead, since they both call the same method
488 * while CDDI takes 1 arg and we are not quite sure what it is.
489 */
490 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL);
491 if (ACPI_FAILURE(status)) {
492 pr_err("evaluation error _SB.CDDR\n");
493 result = -EIO;
494 }
495 break;
496 case 1: /* power on */
497 status = acpi_evaluate_object(NULL, "\\_SB.FBAY", NULL, NULL);
498 if (ACPI_FAILURE(status)) {
499 pr_err("evaluation error _SB.FBAY\n");
500 result = -EIO;
501 }
502 break;
503 default:
504 result = -EINVAL;
505 break;
506 }
507
508 out:
509 return result;
510 }
511
512
513 /* sysfs user interface functions */
514
numbatt_show(struct device * dev,struct device_attribute * attr,char * buf)515 static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
516 char *buf)
517 {
518 struct acpi_device *acpi = to_acpi_device(dev);
519 struct pcc_acpi *pcc = acpi_driver_data(acpi);
520
521 if (!acpi_pcc_retrieve_biosdata(pcc))
522 return -EIO;
523
524 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
525 }
526
lcdtype_show(struct device * dev,struct device_attribute * attr,char * buf)527 static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
528 char *buf)
529 {
530 struct acpi_device *acpi = to_acpi_device(dev);
531 struct pcc_acpi *pcc = acpi_driver_data(acpi);
532
533 if (!acpi_pcc_retrieve_biosdata(pcc))
534 return -EIO;
535
536 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
537 }
538
mute_show(struct device * dev,struct device_attribute * attr,char * buf)539 static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
540 char *buf)
541 {
542 struct acpi_device *acpi = to_acpi_device(dev);
543 struct pcc_acpi *pcc = acpi_driver_data(acpi);
544
545 if (!acpi_pcc_retrieve_biosdata(pcc))
546 return -EIO;
547
548 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_MUTE]);
549 }
550
mute_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)551 static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
552 const char *buf, size_t count)
553 {
554 struct acpi_device *acpi = to_acpi_device(dev);
555 struct pcc_acpi *pcc = acpi_driver_data(acpi);
556 int err, val;
557
558 err = kstrtoint(buf, 0, &val);
559 if (err)
560 return err;
561 if (val == 0 || val == 1) {
562 acpi_pcc_write_sset(pcc, SINF_MUTE, val);
563 pcc->mute = val;
564 }
565
566 return count;
567 }
568
sticky_key_show(struct device * dev,struct device_attribute * attr,char * buf)569 static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
570 char *buf)
571 {
572 struct acpi_device *acpi = to_acpi_device(dev);
573 struct pcc_acpi *pcc = acpi_driver_data(acpi);
574
575 if (!acpi_pcc_retrieve_biosdata(pcc))
576 return -EIO;
577
578 return sysfs_emit(buf, "%u\n", pcc->sticky_key);
579 }
580
sticky_key_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)581 static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
582 const char *buf, size_t count)
583 {
584 struct acpi_device *acpi = to_acpi_device(dev);
585 struct pcc_acpi *pcc = acpi_driver_data(acpi);
586 int err, val;
587
588 err = kstrtoint(buf, 0, &val);
589 if (err)
590 return err;
591 if (val == 0 || val == 1) {
592 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
593 pcc->sticky_key = val;
594 }
595
596 return count;
597 }
598
eco_mode_show(struct device * dev,struct device_attribute * attr,char * buf)599 static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
600 char *buf)
601 {
602 struct acpi_device *acpi = to_acpi_device(dev);
603 struct pcc_acpi *pcc = acpi_driver_data(acpi);
604 int result;
605
606 if (!acpi_pcc_retrieve_biosdata(pcc))
607 return -EIO;
608
609 switch (pcc->sinf[SINF_ECO_MODE]) {
610 case (ECO_MODE_OFF + 3):
611 result = 0;
612 break;
613 case (ECO_MODE_ON + 3):
614 result = 1;
615 break;
616 default:
617 result = -EIO;
618 break;
619 }
620 return sysfs_emit(buf, "%u\n", result);
621 }
622
eco_mode_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)623 static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
624 const char *buf, size_t count)
625 {
626 struct acpi_device *acpi = to_acpi_device(dev);
627 struct pcc_acpi *pcc = acpi_driver_data(acpi);
628 int err, state;
629
630 union acpi_object param[2];
631 struct acpi_object_list input;
632 acpi_status status;
633
634 param[0].type = ACPI_TYPE_INTEGER;
635 param[0].integer.value = 0x15;
636 param[1].type = ACPI_TYPE_INTEGER;
637 input.count = 2;
638 input.pointer = param;
639
640 err = kstrtoint(buf, 0, &state);
641 if (err)
642 return err;
643
644 switch (state) {
645 case 0:
646 param[1].integer.value = ECO_MODE_OFF;
647 pcc->sinf[SINF_ECO_MODE] = 0;
648 pcc->eco_mode = 0;
649 break;
650 case 1:
651 param[1].integer.value = ECO_MODE_ON;
652 pcc->sinf[SINF_ECO_MODE] = 1;
653 pcc->eco_mode = 1;
654 break;
655 default:
656 /* nothing to do */
657 return count;
658 }
659
660 status = acpi_evaluate_object(NULL, METHOD_ECWR,
661 &input, NULL);
662 if (ACPI_FAILURE(status)) {
663 pr_err("%s evaluation failed\n", METHOD_ECWR);
664 return -EINVAL;
665 }
666
667 return count;
668 }
669
ac_brightness_show(struct device * dev,struct device_attribute * attr,char * buf)670 static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr,
671 char *buf)
672 {
673 struct acpi_device *acpi = to_acpi_device(dev);
674 struct pcc_acpi *pcc = acpi_driver_data(acpi);
675
676 if (!acpi_pcc_retrieve_biosdata(pcc))
677 return -EIO;
678
679 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
680 }
681
ac_brightness_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)682 static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
683 const char *buf, size_t count)
684 {
685 struct acpi_device *acpi = to_acpi_device(dev);
686 struct pcc_acpi *pcc = acpi_driver_data(acpi);
687 int err, val;
688
689 err = kstrtoint(buf, 0, &val);
690 if (err)
691 return err;
692 if (val >= 0 && val <= 255) {
693 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
694 pcc->ac_brightness = val;
695 }
696
697 return count;
698 }
699
dc_brightness_show(struct device * dev,struct device_attribute * attr,char * buf)700 static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr,
701 char *buf)
702 {
703 struct acpi_device *acpi = to_acpi_device(dev);
704 struct pcc_acpi *pcc = acpi_driver_data(acpi);
705
706 if (!acpi_pcc_retrieve_biosdata(pcc))
707 return -EIO;
708
709 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
710 }
711
dc_brightness_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)712 static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
713 const char *buf, size_t count)
714 {
715 struct acpi_device *acpi = to_acpi_device(dev);
716 struct pcc_acpi *pcc = acpi_driver_data(acpi);
717 int err, val;
718
719 err = kstrtoint(buf, 0, &val);
720 if (err)
721 return err;
722 if (val >= 0 && val <= 255) {
723 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);
724 pcc->dc_brightness = val;
725 }
726
727 return count;
728 }
729
current_brightness_show(struct device * dev,struct device_attribute * attr,char * buf)730 static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr,
731 char *buf)
732 {
733 struct acpi_device *acpi = to_acpi_device(dev);
734 struct pcc_acpi *pcc = acpi_driver_data(acpi);
735
736 if (!acpi_pcc_retrieve_biosdata(pcc))
737 return -EIO;
738
739 return sysfs_emit(buf, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
740 }
741
current_brightness_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)742 static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
743 const char *buf, size_t count)
744 {
745 struct acpi_device *acpi = to_acpi_device(dev);
746 struct pcc_acpi *pcc = acpi_driver_data(acpi);
747 int err, val;
748
749 err = kstrtoint(buf, 0, &val);
750 if (err)
751 return err;
752
753 if (val >= 0 && val <= 255) {
754 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);
755 pcc->current_brightness = val;
756 }
757
758 return count;
759 }
760
cdpower_show(struct device * dev,struct device_attribute * attr,char * buf)761 static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
762 char *buf)
763 {
764 return sysfs_emit(buf, "%d\n", get_optd_power_state());
765 }
766
cdpower_store(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)767 static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
768 const char *buf, size_t count)
769 {
770 int err, val;
771
772 err = kstrtoint(buf, 10, &val);
773 if (err)
774 return err;
775 set_optd_power_state(val);
776 return count;
777 }
778
779 static DEVICE_ATTR_RO(numbatt);
780 static DEVICE_ATTR_RO(lcdtype);
781 static DEVICE_ATTR_RW(mute);
782 static DEVICE_ATTR_RW(sticky_key);
783 static DEVICE_ATTR_RW(eco_mode);
784 static DEVICE_ATTR_RW(ac_brightness);
785 static DEVICE_ATTR_RW(dc_brightness);
786 static DEVICE_ATTR_RW(current_brightness);
787 static DEVICE_ATTR_RW(cdpower);
788
pcc_sysfs_is_visible(struct kobject * kobj,struct attribute * attr,int idx)789 static umode_t pcc_sysfs_is_visible(struct kobject *kobj, struct attribute *attr, int idx)
790 {
791 struct device *dev = kobj_to_dev(kobj);
792 struct acpi_device *acpi = to_acpi_device(dev);
793 struct pcc_acpi *pcc = acpi_driver_data(acpi);
794
795 if (attr == &dev_attr_mute.attr)
796 return (pcc->num_sifr > SINF_MUTE) ? attr->mode : 0;
797
798 if (attr == &dev_attr_eco_mode.attr)
799 return (pcc->num_sifr > SINF_ECO_MODE) ? attr->mode : 0;
800
801 if (attr == &dev_attr_current_brightness.attr)
802 return (pcc->num_sifr > SINF_CUR_BRIGHT) ? attr->mode : 0;
803
804 return attr->mode;
805 }
806
807 static struct attribute *pcc_sysfs_entries[] = {
808 &dev_attr_numbatt.attr,
809 &dev_attr_lcdtype.attr,
810 &dev_attr_mute.attr,
811 &dev_attr_sticky_key.attr,
812 &dev_attr_eco_mode.attr,
813 &dev_attr_ac_brightness.attr,
814 &dev_attr_dc_brightness.attr,
815 &dev_attr_current_brightness.attr,
816 &dev_attr_cdpower.attr,
817 NULL,
818 };
819
820 static const struct attribute_group pcc_attr_group = {
821 .name = NULL, /* put in device directory */
822 .attrs = pcc_sysfs_entries,
823 .is_visible = pcc_sysfs_is_visible,
824 };
825
826
827 /* hotkey input device driver */
828
829 static int sleep_keydown_seen;
acpi_pcc_generate_keyinput(struct pcc_acpi * pcc)830 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
831 {
832 struct input_dev *hotk_input_dev = pcc->input_dev;
833 int rc;
834 unsigned long long result;
835 unsigned int key;
836 unsigned int updown;
837
838 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
839 NULL, &result);
840 if (ACPI_FAILURE(rc)) {
841 pr_err("error getting hotkey status\n");
842 return;
843 }
844
845 key = result & GENMASK(6, 0);
846 updown = result & BIT(7); /* 0x80 == key down; 0x00 = key up */
847
848 /* hack: some firmware sends no key down for sleep / hibernate */
849 if (key == 7 || key == 10) {
850 if (updown)
851 sleep_keydown_seen = 1;
852 if (!sleep_keydown_seen)
853 sparse_keymap_report_event(hotk_input_dev,
854 key, 0x80, false);
855 }
856
857 /*
858 * Don't report brightness key-presses if they are also reported
859 * by the ACPI video bus.
860 */
861 if ((key == 1 || key == 2) && acpi_video_handles_brightness_key_presses())
862 return;
863
864 if (!sparse_keymap_report_event(hotk_input_dev, key, updown, false))
865 pr_err("Unknown hotkey event: 0x%04llx\n", result);
866 }
867
acpi_pcc_hotkey_notify(struct acpi_device * device,u32 event)868 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
869 {
870 struct pcc_acpi *pcc = acpi_driver_data(device);
871
872 switch (event) {
873 case HKEY_NOTIFY:
874 acpi_pcc_generate_keyinput(pcc);
875 break;
876 default:
877 /* nothing to do */
878 break;
879 }
880 }
881
pcc_optd_notify(acpi_handle handle,u32 event,void * data)882 static void pcc_optd_notify(acpi_handle handle, u32 event, void *data)
883 {
884 if (event != ACPI_NOTIFY_EJECT_REQUEST)
885 return;
886
887 set_optd_power_state(0);
888 }
889
pcc_register_optd_notifier(struct pcc_acpi * pcc,char * node)890 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)
891 {
892 acpi_status status;
893 acpi_handle handle;
894
895 status = acpi_get_handle(NULL, node, &handle);
896
897 if (ACPI_SUCCESS(status)) {
898 status = acpi_install_notify_handler(handle,
899 ACPI_SYSTEM_NOTIFY,
900 pcc_optd_notify, pcc);
901 if (ACPI_FAILURE(status))
902 pr_err("Failed to register notify on %s\n", node);
903 } else
904 return -ENODEV;
905
906 return 0;
907 }
908
pcc_unregister_optd_notifier(struct pcc_acpi * pcc,char * node)909 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)
910 {
911 acpi_status status = AE_OK;
912 acpi_handle handle;
913
914 status = acpi_get_handle(NULL, node, &handle);
915
916 if (ACPI_SUCCESS(status)) {
917 status = acpi_remove_notify_handler(handle,
918 ACPI_SYSTEM_NOTIFY,
919 pcc_optd_notify);
920 if (ACPI_FAILURE(status))
921 pr_err("Error removing optd notify handler %s\n",
922 node);
923 }
924 }
925
acpi_pcc_init_input(struct pcc_acpi * pcc)926 static int acpi_pcc_init_input(struct pcc_acpi *pcc)
927 {
928 struct input_dev *input_dev;
929 int error;
930
931 input_dev = input_allocate_device();
932 if (!input_dev)
933 return -ENOMEM;
934
935 input_dev->name = ACPI_PCC_DRIVER_NAME;
936 input_dev->phys = ACPI_PCC_INPUT_PHYS;
937 input_dev->id.bustype = BUS_HOST;
938 input_dev->id.vendor = 0x0001;
939 input_dev->id.product = 0x0001;
940 input_dev->id.version = 0x0100;
941
942 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
943 if (error) {
944 pr_err("Unable to setup input device keymap\n");
945 goto err_free_dev;
946 }
947
948 error = input_register_device(input_dev);
949 if (error) {
950 pr_err("Unable to register input device\n");
951 goto err_free_dev;
952 }
953
954 pcc->input_dev = input_dev;
955 return 0;
956
957 err_free_dev:
958 input_free_device(input_dev);
959 return error;
960 }
961
962 /* kernel module interface */
963
964 #ifdef CONFIG_PM_SLEEP
acpi_pcc_hotkey_resume(struct device * dev)965 static int acpi_pcc_hotkey_resume(struct device *dev)
966 {
967 struct pcc_acpi *pcc;
968
969 if (!dev)
970 return -EINVAL;
971
972 pcc = acpi_driver_data(to_acpi_device(dev));
973 if (!pcc)
974 return -EINVAL;
975
976 if (pcc->num_sifr > SINF_MUTE)
977 acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
978 if (pcc->num_sifr > SINF_ECO_MODE)
979 acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
980 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
981 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);
982 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);
983 if (pcc->num_sifr > SINF_CUR_BRIGHT)
984 acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);
985
986 return 0;
987 }
988 #endif
989
acpi_pcc_hotkey_add(struct acpi_device * device)990 static int acpi_pcc_hotkey_add(struct acpi_device *device)
991 {
992 struct backlight_properties props;
993 struct pcc_acpi *pcc;
994 int num_sifr, result;
995
996 if (!device)
997 return -EINVAL;
998
999 num_sifr = acpi_pcc_get_sqty(device);
1000
1001 /*
1002 * pcc->sinf is expected to at least have the AC+DC brightness entries.
1003 * Accesses to higher SINF entries are checked against num_sifr.
1004 */
1005 if (num_sifr <= SINF_DC_CUR_BRIGHT || num_sifr > 255) {
1006 pr_err("num_sifr %d out of range %d - 255\n", num_sifr, SINF_DC_CUR_BRIGHT + 1);
1007 return -ENODEV;
1008 }
1009
1010 /*
1011 * Some DSDT-s have an off-by-one bug where the SINF package count is
1012 * one higher than the SQTY reported value, allocate 1 entry extra.
1013 */
1014 num_sifr++;
1015
1016 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
1017 if (!pcc) {
1018 pr_err("Couldn't allocate mem for pcc");
1019 return -ENOMEM;
1020 }
1021
1022 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
1023 if (!pcc->sinf) {
1024 result = -ENOMEM;
1025 goto out_hotkey;
1026 }
1027
1028 pcc->device = device;
1029 pcc->handle = device->handle;
1030 pcc->num_sifr = num_sifr;
1031 device->driver_data = pcc;
1032 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
1033 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
1034
1035 result = acpi_pcc_init_input(pcc);
1036 if (result) {
1037 pr_err("Error installing keyinput handler\n");
1038 goto out_sinf;
1039 }
1040
1041 if (!acpi_pcc_retrieve_biosdata(pcc)) {
1042 result = -EIO;
1043 pr_err("Couldn't retrieve BIOS data\n");
1044 goto out_input;
1045 }
1046
1047 if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1048 /* initialize backlight */
1049 memset(&props, 0, sizeof(struct backlight_properties));
1050 props.type = BACKLIGHT_PLATFORM;
1051 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
1052
1053 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
1054 &pcc_backlight_ops, &props);
1055 if (IS_ERR(pcc->backlight)) {
1056 result = PTR_ERR(pcc->backlight);
1057 goto out_input;
1058 }
1059
1060 /* read the initial brightness setting from the hardware */
1061 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
1062 }
1063
1064 /* Reset initial sticky key mode since the hardware register state is not consistent */
1065 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);
1066 pcc->sticky_key = 0;
1067
1068 pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
1069 pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
1070 if (pcc->num_sifr > SINF_MUTE)
1071 pcc->mute = pcc->sinf[SINF_MUTE];
1072 if (pcc->num_sifr > SINF_ECO_MODE)
1073 pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
1074 if (pcc->num_sifr > SINF_CUR_BRIGHT)
1075 pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
1076
1077 /* add sysfs attributes */
1078 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
1079 if (result)
1080 goto out_backlight;
1081
1082 /* optical drive initialization */
1083 if (ACPI_SUCCESS(check_optd_present())) {
1084 pcc->platform = platform_device_register_simple("panasonic",
1085 PLATFORM_DEVID_NONE, NULL, 0);
1086 if (IS_ERR(pcc->platform)) {
1087 result = PTR_ERR(pcc->platform);
1088 goto out_backlight;
1089 }
1090 result = device_create_file(&pcc->platform->dev,
1091 &dev_attr_cdpower);
1092 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1093 if (result)
1094 goto out_platform;
1095 } else {
1096 pcc->platform = NULL;
1097 }
1098
1099 i8042_install_filter(panasonic_i8042_filter);
1100 return 0;
1101
1102 out_platform:
1103 platform_device_unregister(pcc->platform);
1104 out_backlight:
1105 backlight_device_unregister(pcc->backlight);
1106 out_input:
1107 input_unregister_device(pcc->input_dev);
1108 out_sinf:
1109 kfree(pcc->sinf);
1110 out_hotkey:
1111 kfree(pcc);
1112
1113 return result;
1114 }
1115
acpi_pcc_hotkey_remove(struct acpi_device * device)1116 static void acpi_pcc_hotkey_remove(struct acpi_device *device)
1117 {
1118 struct pcc_acpi *pcc = acpi_driver_data(device);
1119
1120 if (!device || !pcc)
1121 return;
1122
1123 i8042_remove_filter(panasonic_i8042_filter);
1124
1125 if (pcc->platform) {
1126 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);
1127 platform_device_unregister(pcc->platform);
1128 }
1129 pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1130
1131 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1132
1133 backlight_device_unregister(pcc->backlight);
1134
1135 input_unregister_device(pcc->input_dev);
1136
1137 kfree(pcc->sinf);
1138 kfree(pcc);
1139 }
1140
1141 module_acpi_driver(acpi_pcc_driver);
1142