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