1 // SPDX-License-Identifier: GPL-2.0-only
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>
10 * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte
12 *---------------------------------------------------------------------------
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
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
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
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
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
47 * Dac.28, 2007 Harald Welte <laforge@gnumonks.org>
48 * -v0.91 merge with 2.6.24-rc6 ACPI changes
50 * Nov.04, 2006 Hiroshi Miura <miura@da-cha.org>
51 * -v0.9 remove warning about section reference.
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
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.
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().
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
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.
81 * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org>
82 * -v0.6.4 Fix a silly error with status checking
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()
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
96 * Aug.21, 2004 David Bronaugh <dbronaugh@linuxboxen.org>
97 * -v0.6.1 Fix a silly error with status checking
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
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.
108 * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org>
109 * - v0.4 first post version
110 * add function to retrive SIFR
112 * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org>
113 * - v0.3 get proper status of hotkey
115 * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org>
116 * - v0.2 add HotKey handler
118 * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org>
119 * - v0.1 start from toshiba_acpi driver written by John Belmonte
122 #include <linux/kernel.h>
123 #include <linux/module.h>
124 #include <linux/init.h>
125 #include <linux/types.h>
126 #include <linux/backlight.h>
127 #include <linux/ctype.h>
128 #include <linux/seq_file.h>
129 #include <linux/uaccess.h>
130 #include <linux/slab.h>
131 #include <linux/acpi.h>
132 #include <linux/input.h>
133 #include <linux/input/sparse-keymap.h>
134 #include <linux/platform_device.h>
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");
145 #define LOGPREFIX "pcc_acpi: "
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
158 #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support"
159 #define ACPI_PCC_DEVICE_NAME "Hotkey"
160 #define ACPI_PCC_CLASS "pcc"
162 #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0"
164 /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent
165 ECO_MODEs: 0x03 = off, 0x83 = on
167 enum SINF_BITS { SINF_NUM_BATTERIES = 0,
177 SINF_ECO_MODE = 0x0A,
178 SINF_CUR_BRIGHT = 0x0D,
179 SINF_STICKY_KEY = 0x80,
181 /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */
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);
187 static const struct acpi_device_id pcc_device_ids[] = {
194 MODULE_DEVICE_TABLE(acpi, pcc_device_ids);
196 #ifdef CONFIG_PM_SLEEP
197 static int acpi_pcc_hotkey_resume(struct device *dev);
199 static SIMPLE_DEV_PM_OPS(acpi_pcc_hotkey_pm, NULL, acpi_pcc_hotkey_resume);
201 static struct acpi_driver acpi_pcc_driver = {
202 .name = ACPI_PCC_DRIVER_NAME,
203 .class = ACPI_PCC_CLASS,
204 .ids = pcc_device_ids,
206 .add = acpi_pcc_hotkey_add,
207 .remove = acpi_pcc_hotkey_remove,
208 .notify = acpi_pcc_hotkey_notify,
210 .drv.pm = &acpi_pcc_hotkey_pm,
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 } },
230 unsigned long num_sifr;
236 int current_brightness;
238 struct acpi_device *device;
239 struct input_dev *input_dev;
240 struct backlight_device *backlight;
241 struct platform_device *platform;
244 /* method access functions */
245 static int acpi_pcc_write_sset(struct pcc_acpi *pcc, int func, int val)
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, },
253 struct acpi_object_list params = {
254 .count = ARRAY_SIZE(in_objs),
257 acpi_status status = AE_OK;
259 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET,
262 return (status == AE_OK) ? 0 : -EIO;
265 static inline int acpi_pcc_get_sqty(struct acpi_device *device)
267 unsigned long long s;
270 status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY,
272 if (ACPI_SUCCESS(status))
275 pr_err("evaluation error HKEY.SQTY\n");
280 static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc)
283 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
284 union acpi_object *hkey = NULL;
287 status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL,
289 if (ACPI_FAILURE(status)) {
290 pr_err("evaluation error HKEY.SINF\n");
294 hkey = buffer.pointer;
295 if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
296 pr_err("Invalid HKEY.SINF\n");
301 if (pcc->num_sifr < hkey->package.count) {
302 pr_err("SQTY reports bad SINF length\n");
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;
312 pr_err("Invalid HKEY.SINF data\n");
314 pcc->sinf[hkey->package.count] = -1;
317 kfree(buffer.pointer);
318 return status == AE_OK;
321 /* backlight API interface functions */
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
328 static int bl_get(struct backlight_device *bd)
330 struct pcc_acpi *pcc = bl_get_data(bd);
332 if (!acpi_pcc_retrieve_biosdata(pcc))
335 return pcc->sinf[SINF_AC_CUR_BRIGHT];
338 static int bl_set_status(struct backlight_device *bd)
340 struct pcc_acpi *pcc = bl_get_data(bd);
341 int bright = bd->props.brightness;
344 if (!acpi_pcc_retrieve_biosdata(pcc))
347 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT])
348 bright = pcc->sinf[SINF_AC_MIN_BRIGHT];
350 if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT])
351 bright = pcc->sinf[SINF_DC_MIN_BRIGHT];
353 if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] ||
354 bright > pcc->sinf[SINF_AC_MAX_BRIGHT])
357 rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright);
361 return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright);
364 static const struct backlight_ops pcc_backlight_ops = {
365 .get_brightness = bl_get,
366 .update_status = bl_set_status,
370 /* returns ACPI_SUCCESS if methods to control optical drive are present */
372 static acpi_status check_optd_present(void)
374 acpi_status status = AE_OK;
377 status = acpi_get_handle(NULL, "\\_SB.STAT", &handle);
378 if (ACPI_FAILURE(status))
380 status = acpi_get_handle(NULL, "\\_SB.FBAY", &handle);
381 if (ACPI_FAILURE(status))
383 status = acpi_get_handle(NULL, "\\_SB.CDDI", &handle);
384 if (ACPI_FAILURE(status))
391 /* get optical driver power state */
393 static int get_optd_power_state(void)
396 unsigned long long state;
399 status = acpi_evaluate_integer(NULL, "\\_SB.STAT", NULL, &state);
400 if (ACPI_FAILURE(status)) {
401 pr_err("evaluation error _SB.STAT\n");
406 case 0: /* power off */
409 case 0x0f: /* power on */
421 /* set optical drive power state */
423 static int set_optd_power_state(int new_state)
428 result = get_optd_power_state();
431 if (new_state == result)
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.
439 status = acpi_evaluate_object(NULL, "\\_SB.CDDR", NULL, NULL);
440 if (ACPI_FAILURE(status)) {
441 pr_err("evaluation error _SB.CDDR\n");
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");
462 /* sysfs user interface functions */
464 static ssize_t numbatt_show(struct device *dev, struct device_attribute *attr,
467 struct acpi_device *acpi = to_acpi_device(dev);
468 struct pcc_acpi *pcc = acpi_driver_data(acpi);
470 if (!acpi_pcc_retrieve_biosdata(pcc))
473 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]);
476 static ssize_t lcdtype_show(struct device *dev, struct device_attribute *attr,
479 struct acpi_device *acpi = to_acpi_device(dev);
480 struct pcc_acpi *pcc = acpi_driver_data(acpi);
482 if (!acpi_pcc_retrieve_biosdata(pcc))
485 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]);
488 static ssize_t mute_show(struct device *dev, struct device_attribute *attr,
491 struct acpi_device *acpi = to_acpi_device(dev);
492 struct pcc_acpi *pcc = acpi_driver_data(acpi);
494 if (!acpi_pcc_retrieve_biosdata(pcc))
497 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]);
500 static ssize_t mute_store(struct device *dev, struct device_attribute *attr,
501 const char *buf, size_t count)
503 struct acpi_device *acpi = to_acpi_device(dev);
504 struct pcc_acpi *pcc = acpi_driver_data(acpi);
507 err = kstrtoint(buf, 0, &val);
510 if (val == 0 || val == 1) {
511 acpi_pcc_write_sset(pcc, SINF_MUTE, val);
518 static ssize_t sticky_key_show(struct device *dev, struct device_attribute *attr,
521 struct acpi_device *acpi = to_acpi_device(dev);
522 struct pcc_acpi *pcc = acpi_driver_data(acpi);
524 if (!acpi_pcc_retrieve_biosdata(pcc))
527 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sticky_key);
530 static ssize_t sticky_key_store(struct device *dev, struct device_attribute *attr,
531 const char *buf, size_t count)
533 struct acpi_device *acpi = to_acpi_device(dev);
534 struct pcc_acpi *pcc = acpi_driver_data(acpi);
537 err = kstrtoint(buf, 0, &val);
540 if (val == 0 || val == 1) {
541 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val);
542 pcc->sticky_key = val;
548 static ssize_t eco_mode_show(struct device *dev, struct device_attribute *attr,
551 struct acpi_device *acpi = to_acpi_device(dev);
552 struct pcc_acpi *pcc = acpi_driver_data(acpi);
555 if (!acpi_pcc_retrieve_biosdata(pcc))
558 switch (pcc->sinf[SINF_ECO_MODE]) {
559 case (ECO_MODE_OFF + 3):
562 case (ECO_MODE_ON + 3):
569 return snprintf(buf, PAGE_SIZE, "%u\n", result);
572 static ssize_t eco_mode_store(struct device *dev, struct device_attribute *attr,
573 const char *buf, size_t count)
575 struct acpi_device *acpi = to_acpi_device(dev);
576 struct pcc_acpi *pcc = acpi_driver_data(acpi);
579 union acpi_object param[2];
580 struct acpi_object_list input;
583 param[0].type = ACPI_TYPE_INTEGER;
584 param[0].integer.value = 0x15;
585 param[1].type = ACPI_TYPE_INTEGER;
587 input.pointer = param;
589 err = kstrtoint(buf, 0, &state);
595 param[1].integer.value = ECO_MODE_OFF;
596 pcc->sinf[SINF_ECO_MODE] = 0;
600 param[1].integer.value = ECO_MODE_ON;
601 pcc->sinf[SINF_ECO_MODE] = 1;
609 status = acpi_evaluate_object(NULL, METHOD_ECWR,
611 if (ACPI_FAILURE(status)) {
612 pr_err("%s evaluation failed\n", METHOD_ECWR);
619 static ssize_t ac_brightness_show(struct device *dev, struct device_attribute *attr,
622 struct acpi_device *acpi = to_acpi_device(dev);
623 struct pcc_acpi *pcc = acpi_driver_data(acpi);
625 if (!acpi_pcc_retrieve_biosdata(pcc))
628 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_AC_CUR_BRIGHT]);
631 static ssize_t ac_brightness_store(struct device *dev, struct device_attribute *attr,
632 const char *buf, size_t count)
634 struct acpi_device *acpi = to_acpi_device(dev);
635 struct pcc_acpi *pcc = acpi_driver_data(acpi);
638 err = kstrtoint(buf, 0, &val);
641 if (val >= 0 && val <= 255) {
642 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, val);
643 pcc->ac_brightness = val;
649 static ssize_t dc_brightness_show(struct device *dev, struct device_attribute *attr,
652 struct acpi_device *acpi = to_acpi_device(dev);
653 struct pcc_acpi *pcc = acpi_driver_data(acpi);
655 if (!acpi_pcc_retrieve_biosdata(pcc))
658 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_DC_CUR_BRIGHT]);
661 static ssize_t dc_brightness_store(struct device *dev, struct device_attribute *attr,
662 const char *buf, size_t count)
664 struct acpi_device *acpi = to_acpi_device(dev);
665 struct pcc_acpi *pcc = acpi_driver_data(acpi);
668 err = kstrtoint(buf, 0, &val);
671 if (val >= 0 && val <= 255) {
672 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, val);
673 pcc->dc_brightness = val;
679 static ssize_t current_brightness_show(struct device *dev, struct device_attribute *attr,
682 struct acpi_device *acpi = to_acpi_device(dev);
683 struct pcc_acpi *pcc = acpi_driver_data(acpi);
685 if (!acpi_pcc_retrieve_biosdata(pcc))
688 return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_CUR_BRIGHT]);
691 static ssize_t current_brightness_store(struct device *dev, struct device_attribute *attr,
692 const char *buf, size_t count)
694 struct acpi_device *acpi = to_acpi_device(dev);
695 struct pcc_acpi *pcc = acpi_driver_data(acpi);
698 err = kstrtoint(buf, 0, &val);
702 if (val >= 0 && val <= 255) {
703 err = acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, val);
704 pcc->current_brightness = val;
710 static ssize_t cdpower_show(struct device *dev, struct device_attribute *attr,
713 return snprintf(buf, PAGE_SIZE, "%d\n", get_optd_power_state());
716 static ssize_t cdpower_store(struct device *dev, struct device_attribute *attr,
717 const char *buf, size_t count)
721 err = kstrtoint(buf, 10, &val);
724 set_optd_power_state(val);
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);
738 static struct attribute *pcc_sysfs_entries[] = {
739 &dev_attr_numbatt.attr,
740 &dev_attr_lcdtype.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,
751 static const struct attribute_group pcc_attr_group = {
752 .name = NULL, /* put in device directory */
753 .attrs = pcc_sysfs_entries,
757 /* hotkey input device driver */
759 static int sleep_keydown_seen;
760 static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc)
762 struct input_dev *hotk_input_dev = pcc->input_dev;
764 unsigned long long result;
766 rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY,
768 if (ACPI_FAILURE(rc)) {
769 pr_err("error getting hotkey status\n");
773 /* hack: some firmware sends no key down for sleep / hibernate */
774 if ((result & 0xf) == 0x7 || (result & 0xf) == 0xa) {
776 sleep_keydown_seen = 1;
777 if (!sleep_keydown_seen)
778 sparse_keymap_report_event(hotk_input_dev,
779 result & 0xf, 0x80, false);
782 if ((result & 0xf) == 0x7 || (result & 0xf) == 0x9 || (result & 0xf) == 0xa) {
783 if (!sparse_keymap_report_event(hotk_input_dev,
784 result & 0xf, result & 0x80, false))
785 pr_err("Unknown hotkey event: 0x%04llx\n", result);
789 static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)
791 struct pcc_acpi *pcc = acpi_driver_data(device);
795 acpi_pcc_generate_keyinput(pcc);
803 static void pcc_optd_notify(acpi_handle handle, u32 event, void *data)
805 if (event != ACPI_NOTIFY_EJECT_REQUEST)
808 set_optd_power_state(0);
811 static int pcc_register_optd_notifier(struct pcc_acpi *pcc, char *node)
816 status = acpi_get_handle(NULL, node, &handle);
818 if (ACPI_SUCCESS(status)) {
819 status = acpi_install_notify_handler(handle,
821 pcc_optd_notify, pcc);
822 if (ACPI_FAILURE(status))
823 pr_err("Failed to register notify on %s\n", node);
830 static void pcc_unregister_optd_notifier(struct pcc_acpi *pcc, char *node)
832 acpi_status status = AE_OK;
835 status = acpi_get_handle(NULL, node, &handle);
837 if (ACPI_SUCCESS(status)) {
838 status = acpi_remove_notify_handler(handle,
841 if (ACPI_FAILURE(status))
842 pr_err("Error removing optd notify handler %s\n",
847 static int acpi_pcc_init_input(struct pcc_acpi *pcc)
849 struct input_dev *input_dev;
852 input_dev = input_allocate_device();
856 input_dev->name = ACPI_PCC_DRIVER_NAME;
857 input_dev->phys = ACPI_PCC_INPUT_PHYS;
858 input_dev->id.bustype = BUS_HOST;
859 input_dev->id.vendor = 0x0001;
860 input_dev->id.product = 0x0001;
861 input_dev->id.version = 0x0100;
863 error = sparse_keymap_setup(input_dev, panasonic_keymap, NULL);
865 pr_err("Unable to setup input device keymap\n");
869 error = input_register_device(input_dev);
871 pr_err("Unable to register input device\n");
875 pcc->input_dev = input_dev;
879 input_free_device(input_dev);
883 /* kernel module interface */
885 #ifdef CONFIG_PM_SLEEP
886 static int acpi_pcc_hotkey_resume(struct device *dev)
888 struct pcc_acpi *pcc;
893 pcc = acpi_driver_data(to_acpi_device(dev));
897 acpi_pcc_write_sset(pcc, SINF_MUTE, pcc->mute);
898 acpi_pcc_write_sset(pcc, SINF_ECO_MODE, pcc->eco_mode);
899 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_key);
900 acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, pcc->ac_brightness);
901 acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, pcc->dc_brightness);
902 acpi_pcc_write_sset(pcc, SINF_CUR_BRIGHT, pcc->current_brightness);
908 static int acpi_pcc_hotkey_add(struct acpi_device *device)
910 struct backlight_properties props;
911 struct pcc_acpi *pcc;
912 int num_sifr, result;
917 num_sifr = acpi_pcc_get_sqty(device);
919 if (num_sifr < 0 || num_sifr > 255) {
920 pr_err("num_sifr out of range");
924 pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL);
926 pr_err("Couldn't allocate mem for pcc");
930 pcc->sinf = kcalloc(num_sifr + 1, sizeof(u32), GFP_KERNEL);
936 pcc->device = device;
937 pcc->handle = device->handle;
938 pcc->num_sifr = num_sifr;
939 device->driver_data = pcc;
940 strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME);
941 strcpy(acpi_device_class(device), ACPI_PCC_CLASS);
943 result = acpi_pcc_init_input(pcc);
945 pr_err("Error installing keyinput handler\n");
949 if (!acpi_pcc_retrieve_biosdata(pcc)) {
951 pr_err("Couldn't retrieve BIOS data\n");
954 /* initialize backlight */
955 memset(&props, 0, sizeof(struct backlight_properties));
956 props.type = BACKLIGHT_PLATFORM;
957 props.max_brightness = pcc->sinf[SINF_AC_MAX_BRIGHT];
958 pcc->backlight = backlight_device_register("panasonic", NULL, pcc,
959 &pcc_backlight_ops, &props);
960 if (IS_ERR(pcc->backlight)) {
961 result = PTR_ERR(pcc->backlight);
965 /* read the initial brightness setting from the hardware */
966 pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
968 /* Reset initial sticky key mode since the hardware register state is not consistent */
969 acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, 0);
972 pcc->eco_mode = pcc->sinf[SINF_ECO_MODE];
973 pcc->mute = pcc->sinf[SINF_MUTE];
974 pcc->ac_brightness = pcc->sinf[SINF_AC_CUR_BRIGHT];
975 pcc->dc_brightness = pcc->sinf[SINF_DC_CUR_BRIGHT];
976 pcc->current_brightness = pcc->sinf[SINF_CUR_BRIGHT];
978 /* add sysfs attributes */
979 result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group);
983 /* optical drive initialization */
984 if (ACPI_SUCCESS(check_optd_present())) {
985 pcc->platform = platform_device_register_simple("panasonic",
987 if (IS_ERR(pcc->platform)) {
988 result = PTR_ERR(pcc->platform);
991 result = device_create_file(&pcc->platform->dev,
993 pcc_register_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
997 pcc->platform = NULL;
1003 platform_device_unregister(pcc->platform);
1005 backlight_device_unregister(pcc->backlight);
1007 input_unregister_device(pcc->input_dev);
1016 static int acpi_pcc_hotkey_remove(struct acpi_device *device)
1018 struct pcc_acpi *pcc = acpi_driver_data(device);
1020 if (!device || !pcc)
1023 if (pcc->platform) {
1024 device_remove_file(&pcc->platform->dev, &dev_attr_cdpower);
1025 platform_device_unregister(pcc->platform);
1027 pcc_unregister_optd_notifier(pcc, "\\_SB.PCI0.EHCI.ERHB.OPTD");
1029 sysfs_remove_group(&device->dev.kobj, &pcc_attr_group);
1031 backlight_device_unregister(pcc->backlight);
1033 input_unregister_device(pcc->input_dev);
1041 module_acpi_driver(acpi_pcc_driver);