4 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
6 * Portions based on wistron_btns.c:
7 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
8 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
9 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/init.h>
29 #include <linux/slab.h>
30 #include <linux/types.h>
31 #include <linux/input.h>
32 #include <linux/platform_device.h>
33 #include <linux/acpi.h>
34 #include <linux/rfkill.h>
35 #include <linux/string.h>
37 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
38 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
39 MODULE_LICENSE("GPL");
41 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
42 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
44 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
45 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
47 #define HPWMI_DISPLAY_QUERY 0x1
48 #define HPWMI_HDDTEMP_QUERY 0x2
49 #define HPWMI_ALS_QUERY 0x3
50 #define HPWMI_HARDWARE_QUERY 0x4
51 #define HPWMI_WIRELESS_QUERY 0x5
52 #define HPWMI_HOTKEY_QUERY 0xc
54 #define PREFIX "HP WMI: "
55 #define UNIMP "Unimplemented "
63 enum hp_wmi_event_ids
{
66 HPWMI_SMART_ADAPTER
= 3,
67 HPWMI_BEZEL_BUTTON
= 4,
69 HPWMI_CPU_BATTERY_THROTTLE
= 6,
70 HPWMI_LOCK_SWITCH
= 7,
73 static int __devinit
hp_wmi_bios_setup(struct platform_device
*device
);
74 static int __exit
hp_wmi_bios_remove(struct platform_device
*device
);
75 static int hp_wmi_resume_handler(struct device
*device
);
92 char type
; /* See KE_* below */
97 enum { KE_KEY
, KE_END
};
99 static struct key_entry hp_wmi_keymap
[] = {
100 {KE_KEY
, 0x02, KEY_BRIGHTNESSUP
},
101 {KE_KEY
, 0x03, KEY_BRIGHTNESSDOWN
},
102 {KE_KEY
, 0x20e6, KEY_PROG1
},
103 {KE_KEY
, 0x20e8, KEY_MEDIA
},
104 {KE_KEY
, 0x2142, KEY_MEDIA
},
105 {KE_KEY
, 0x213b, KEY_INFO
},
106 {KE_KEY
, 0x2169, KEY_DIRECTION
},
107 {KE_KEY
, 0x231b, KEY_HELP
},
111 static struct input_dev
*hp_wmi_input_dev
;
112 static struct platform_device
*hp_wmi_platform_dev
;
114 static struct rfkill
*wifi_rfkill
;
115 static struct rfkill
*bluetooth_rfkill
;
116 static struct rfkill
*wwan_rfkill
;
118 static const struct dev_pm_ops hp_wmi_pm_ops
= {
119 .resume
= hp_wmi_resume_handler
,
120 .restore
= hp_wmi_resume_handler
,
123 static struct platform_driver hp_wmi_driver
= {
126 .owner
= THIS_MODULE
,
127 .pm
= &hp_wmi_pm_ops
,
129 .probe
= hp_wmi_bios_setup
,
130 .remove
= hp_wmi_bios_remove
,
134 * hp_wmi_perform_query
136 * query: The commandtype -> What should be queried
137 * write: The command -> 0 read, 1 write, 3 ODM specific
138 * buffer: Buffer used as input and/or output
139 * buffersize: Size of buffer
141 * returns zero on success
142 * an HP WMI query specific error code (which is positive)
143 * -EINVAL if the query was not successful at all
144 * -EINVAL if the output buffer size exceeds buffersize
146 * Note: The buffersize must at least be the maximum of the input and output
147 * size. E.g. Battery info query (0x7) is defined to have 1 byte input
148 * and 128 byte output. The caller would do:
149 * buffer = kzalloc(128, GFP_KERNEL);
150 * ret = hp_wmi_perform_query(0x7, 0, buffer, 128)
152 static int hp_wmi_perform_query(int query
, int write
, u32
*buffer
,
155 struct bios_return bios_return
;
157 union acpi_object
*obj
;
158 struct bios_args args
= {
159 .signature
= 0x55434553,
160 .command
= write
? 0x2 : 0x1,
161 .commandtype
= query
,
162 .datasize
= buffersize
,
165 struct acpi_buffer input
= { sizeof(struct bios_args
), &args
};
166 struct acpi_buffer output
= { ACPI_ALLOCATE_BUFFER
, NULL
};
168 status
= wmi_evaluate_method(HPWMI_BIOS_GUID
, 0, 0x3, &input
, &output
);
170 obj
= output
.pointer
;
174 else if (obj
->type
!= ACPI_TYPE_BUFFER
) {
179 bios_return
= *((struct bios_return
*)obj
->buffer
.pointer
);
181 memcpy(buffer
, &bios_return
.value
, sizeof(bios_return
.value
));
185 static int hp_wmi_display_state(void)
188 int ret
= hp_wmi_perform_query(HPWMI_DISPLAY_QUERY
, 0, &state
,
195 static int hp_wmi_hddtemp_state(void)
198 int ret
= hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY
, 0, &state
,
205 static int hp_wmi_als_state(void)
208 int ret
= hp_wmi_perform_query(HPWMI_ALS_QUERY
, 0, &state
,
215 static int hp_wmi_dock_state(void)
218 int ret
= hp_wmi_perform_query(HPWMI_HARDWARE_QUERY
, 0, &state
,
227 static int hp_wmi_tablet_state(void)
230 int ret
= hp_wmi_perform_query(HPWMI_HARDWARE_QUERY
, 0, &state
,
235 return (state
& 0x4) ? 1 : 0;
238 static int hp_wmi_set_block(void *data
, bool blocked
)
240 enum hp_wmi_radio r
= (enum hp_wmi_radio
) data
;
241 int query
= BIT(r
+ 8) | ((!blocked
) << r
);
244 ret
= hp_wmi_perform_query(HPWMI_WIRELESS_QUERY
, 1,
245 &query
, sizeof(query
));
251 static const struct rfkill_ops hp_wmi_rfkill_ops
= {
252 .set_block
= hp_wmi_set_block
,
255 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r
)
259 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY
, 0,
260 &wireless
, sizeof(wireless
));
261 /* TBD: Pass error */
263 mask
= 0x200 << (r
* 8);
271 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r
)
275 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY
, 0,
276 &wireless
, sizeof(wireless
));
277 /* TBD: Pass error */
279 mask
= 0x800 << (r
* 8);
287 static ssize_t
show_display(struct device
*dev
, struct device_attribute
*attr
,
290 int value
= hp_wmi_display_state();
293 return sprintf(buf
, "%d\n", value
);
296 static ssize_t
show_hddtemp(struct device
*dev
, struct device_attribute
*attr
,
299 int value
= hp_wmi_hddtemp_state();
302 return sprintf(buf
, "%d\n", value
);
305 static ssize_t
show_als(struct device
*dev
, struct device_attribute
*attr
,
308 int value
= hp_wmi_als_state();
311 return sprintf(buf
, "%d\n", value
);
314 static ssize_t
show_dock(struct device
*dev
, struct device_attribute
*attr
,
317 int value
= hp_wmi_dock_state();
320 return sprintf(buf
, "%d\n", value
);
323 static ssize_t
show_tablet(struct device
*dev
, struct device_attribute
*attr
,
326 int value
= hp_wmi_tablet_state();
329 return sprintf(buf
, "%d\n", value
);
332 static ssize_t
set_als(struct device
*dev
, struct device_attribute
*attr
,
333 const char *buf
, size_t count
)
335 u32 tmp
= simple_strtoul(buf
, NULL
, 10);
336 int ret
= hp_wmi_perform_query(HPWMI_ALS_QUERY
, 1, &tmp
,
344 static DEVICE_ATTR(display
, S_IRUGO
, show_display
, NULL
);
345 static DEVICE_ATTR(hddtemp
, S_IRUGO
, show_hddtemp
, NULL
);
346 static DEVICE_ATTR(als
, S_IRUGO
| S_IWUSR
, show_als
, set_als
);
347 static DEVICE_ATTR(dock
, S_IRUGO
, show_dock
, NULL
);
348 static DEVICE_ATTR(tablet
, S_IRUGO
, show_tablet
, NULL
);
350 static struct key_entry
*hp_wmi_get_entry_by_scancode(unsigned int code
)
352 struct key_entry
*key
;
354 for (key
= hp_wmi_keymap
; key
->type
!= KE_END
; key
++)
355 if (code
== key
->code
)
361 static struct key_entry
*hp_wmi_get_entry_by_keycode(unsigned int keycode
)
363 struct key_entry
*key
;
365 for (key
= hp_wmi_keymap
; key
->type
!= KE_END
; key
++)
366 if (key
->type
== KE_KEY
&& keycode
== key
->keycode
)
372 static int hp_wmi_getkeycode(struct input_dev
*dev
,
373 unsigned int scancode
, unsigned int *keycode
)
375 struct key_entry
*key
= hp_wmi_get_entry_by_scancode(scancode
);
377 if (key
&& key
->type
== KE_KEY
) {
378 *keycode
= key
->keycode
;
385 static int hp_wmi_setkeycode(struct input_dev
*dev
,
386 unsigned int scancode
, unsigned int keycode
)
388 struct key_entry
*key
;
389 unsigned int old_keycode
;
391 key
= hp_wmi_get_entry_by_scancode(scancode
);
392 if (key
&& key
->type
== KE_KEY
) {
393 old_keycode
= key
->keycode
;
394 key
->keycode
= keycode
;
395 set_bit(keycode
, dev
->keybit
);
396 if (!hp_wmi_get_entry_by_keycode(old_keycode
))
397 clear_bit(old_keycode
, dev
->keybit
);
404 static void hp_wmi_notify(u32 value
, void *context
)
406 struct acpi_buffer response
= { ACPI_ALLOCATE_BUFFER
, NULL
};
407 static struct key_entry
*key
;
408 union acpi_object
*obj
;
409 u32 event_id
, event_data
;
410 int key_code
= 0, ret
;
414 status
= wmi_get_event_data(value
, &response
);
415 if (status
!= AE_OK
) {
416 printk(KERN_INFO PREFIX
"bad event status 0x%x\n", status
);
420 obj
= (union acpi_object
*)response
.pointer
;
424 if (obj
->type
!= ACPI_TYPE_BUFFER
) {
425 printk(KERN_INFO
"hp-wmi: Unknown response received %d\n",
432 * Depending on ACPI version the concatenation of id and event data
433 * inside _WED function will result in a 8 or 16 byte buffer.
435 location
= (u32
*)obj
->buffer
.pointer
;
436 if (obj
->buffer
.length
== 8) {
437 event_id
= *location
;
438 event_data
= *(location
+ 1);
439 } else if (obj
->buffer
.length
== 16) {
440 event_id
= *location
;
441 event_data
= *(location
+ 2);
443 printk(KERN_INFO
"hp-wmi: Unknown buffer length %d\n",
451 case HPWMI_DOCK_EVENT
:
452 input_report_switch(hp_wmi_input_dev
, SW_DOCK
,
453 hp_wmi_dock_state());
454 input_report_switch(hp_wmi_input_dev
, SW_TABLET_MODE
,
455 hp_wmi_tablet_state());
456 input_sync(hp_wmi_input_dev
);
460 case HPWMI_SMART_ADAPTER
:
462 case HPWMI_BEZEL_BUTTON
:
463 ret
= hp_wmi_perform_query(HPWMI_HOTKEY_QUERY
, 0,
468 key
= hp_wmi_get_entry_by_scancode(key_code
);
472 input_report_key(hp_wmi_input_dev
,
474 input_sync(hp_wmi_input_dev
);
475 input_report_key(hp_wmi_input_dev
,
477 input_sync(hp_wmi_input_dev
);
481 printk(KERN_INFO PREFIX
"Unknown key code - 0x%x\n",
486 rfkill_set_states(wifi_rfkill
,
487 hp_wmi_get_sw_state(HPWMI_WIFI
),
488 hp_wmi_get_hw_state(HPWMI_WIFI
));
489 if (bluetooth_rfkill
)
490 rfkill_set_states(bluetooth_rfkill
,
491 hp_wmi_get_sw_state(HPWMI_BLUETOOTH
),
492 hp_wmi_get_hw_state(HPWMI_BLUETOOTH
));
494 rfkill_set_states(wwan_rfkill
,
495 hp_wmi_get_sw_state(HPWMI_WWAN
),
496 hp_wmi_get_hw_state(HPWMI_WWAN
));
498 case HPWMI_CPU_BATTERY_THROTTLE
:
499 printk(KERN_INFO PREFIX UNIMP
"CPU throttle because of 3 Cell"
500 " battery event detected\n");
502 case HPWMI_LOCK_SWITCH
:
505 printk(KERN_INFO PREFIX
"Unknown event_id - %d - 0x%x\n",
506 event_id
, event_data
);
511 static int __init
hp_wmi_input_setup(void)
513 struct key_entry
*key
;
516 hp_wmi_input_dev
= input_allocate_device();
517 if (!hp_wmi_input_dev
)
520 hp_wmi_input_dev
->name
= "HP WMI hotkeys";
521 hp_wmi_input_dev
->phys
= "wmi/input0";
522 hp_wmi_input_dev
->id
.bustype
= BUS_HOST
;
523 hp_wmi_input_dev
->getkeycode
= hp_wmi_getkeycode
;
524 hp_wmi_input_dev
->setkeycode
= hp_wmi_setkeycode
;
526 for (key
= hp_wmi_keymap
; key
->type
!= KE_END
; key
++) {
529 set_bit(EV_KEY
, hp_wmi_input_dev
->evbit
);
530 set_bit(key
->keycode
, hp_wmi_input_dev
->keybit
);
535 set_bit(EV_SW
, hp_wmi_input_dev
->evbit
);
536 set_bit(SW_DOCK
, hp_wmi_input_dev
->swbit
);
537 set_bit(SW_TABLET_MODE
, hp_wmi_input_dev
->swbit
);
539 /* Set initial hardware state */
540 input_report_switch(hp_wmi_input_dev
, SW_DOCK
, hp_wmi_dock_state());
541 input_report_switch(hp_wmi_input_dev
, SW_TABLET_MODE
,
542 hp_wmi_tablet_state());
543 input_sync(hp_wmi_input_dev
);
545 err
= input_register_device(hp_wmi_input_dev
);
548 input_free_device(hp_wmi_input_dev
);
555 static void cleanup_sysfs(struct platform_device
*device
)
557 device_remove_file(&device
->dev
, &dev_attr_display
);
558 device_remove_file(&device
->dev
, &dev_attr_hddtemp
);
559 device_remove_file(&device
->dev
, &dev_attr_als
);
560 device_remove_file(&device
->dev
, &dev_attr_dock
);
561 device_remove_file(&device
->dev
, &dev_attr_tablet
);
564 static int __devinit
hp_wmi_bios_setup(struct platform_device
*device
)
569 err
= hp_wmi_perform_query(HPWMI_WIRELESS_QUERY
, 0, &wireless
,
574 err
= device_create_file(&device
->dev
, &dev_attr_display
);
576 goto add_sysfs_error
;
577 err
= device_create_file(&device
->dev
, &dev_attr_hddtemp
);
579 goto add_sysfs_error
;
580 err
= device_create_file(&device
->dev
, &dev_attr_als
);
582 goto add_sysfs_error
;
583 err
= device_create_file(&device
->dev
, &dev_attr_dock
);
585 goto add_sysfs_error
;
586 err
= device_create_file(&device
->dev
, &dev_attr_tablet
);
588 goto add_sysfs_error
;
590 if (wireless
& 0x1) {
591 wifi_rfkill
= rfkill_alloc("hp-wifi", &device
->dev
,
594 (void *) HPWMI_WIFI
);
595 rfkill_init_sw_state(wifi_rfkill
,
596 hp_wmi_get_sw_state(HPWMI_WIFI
));
597 rfkill_set_hw_state(wifi_rfkill
,
598 hp_wmi_get_hw_state(HPWMI_WIFI
));
599 err
= rfkill_register(wifi_rfkill
);
601 goto register_wifi_error
;
604 if (wireless
& 0x2) {
605 bluetooth_rfkill
= rfkill_alloc("hp-bluetooth", &device
->dev
,
606 RFKILL_TYPE_BLUETOOTH
,
608 (void *) HPWMI_BLUETOOTH
);
609 rfkill_init_sw_state(bluetooth_rfkill
,
610 hp_wmi_get_sw_state(HPWMI_BLUETOOTH
));
611 rfkill_set_hw_state(bluetooth_rfkill
,
612 hp_wmi_get_hw_state(HPWMI_BLUETOOTH
));
613 err
= rfkill_register(bluetooth_rfkill
);
615 goto register_bluetooth_error
;
618 if (wireless
& 0x4) {
619 wwan_rfkill
= rfkill_alloc("hp-wwan", &device
->dev
,
622 (void *) HPWMI_WWAN
);
623 rfkill_init_sw_state(wwan_rfkill
,
624 hp_wmi_get_sw_state(HPWMI_WWAN
));
625 rfkill_set_hw_state(wwan_rfkill
,
626 hp_wmi_get_hw_state(HPWMI_WWAN
));
627 err
= rfkill_register(wwan_rfkill
);
629 goto register_wwan_err
;
634 rfkill_destroy(wwan_rfkill
);
635 if (bluetooth_rfkill
)
636 rfkill_unregister(bluetooth_rfkill
);
637 register_bluetooth_error
:
638 rfkill_destroy(bluetooth_rfkill
);
640 rfkill_unregister(wifi_rfkill
);
642 rfkill_destroy(wifi_rfkill
);
644 cleanup_sysfs(device
);
648 static int __exit
hp_wmi_bios_remove(struct platform_device
*device
)
650 cleanup_sysfs(device
);
653 rfkill_unregister(wifi_rfkill
);
654 rfkill_destroy(wifi_rfkill
);
656 if (bluetooth_rfkill
) {
657 rfkill_unregister(bluetooth_rfkill
);
658 rfkill_destroy(bluetooth_rfkill
);
661 rfkill_unregister(wwan_rfkill
);
662 rfkill_destroy(wwan_rfkill
);
668 static int hp_wmi_resume_handler(struct device
*device
)
671 * Hardware state may have changed while suspended, so trigger
672 * input events for the current state. As this is a switch,
673 * the input layer will only actually pass it on if the state
676 if (hp_wmi_input_dev
) {
677 input_report_switch(hp_wmi_input_dev
, SW_DOCK
,
678 hp_wmi_dock_state());
679 input_report_switch(hp_wmi_input_dev
, SW_TABLET_MODE
,
680 hp_wmi_tablet_state());
681 input_sync(hp_wmi_input_dev
);
685 rfkill_set_states(wifi_rfkill
,
686 hp_wmi_get_sw_state(HPWMI_WIFI
),
687 hp_wmi_get_hw_state(HPWMI_WIFI
));
688 if (bluetooth_rfkill
)
689 rfkill_set_states(bluetooth_rfkill
,
690 hp_wmi_get_sw_state(HPWMI_BLUETOOTH
),
691 hp_wmi_get_hw_state(HPWMI_BLUETOOTH
));
693 rfkill_set_states(wwan_rfkill
,
694 hp_wmi_get_sw_state(HPWMI_WWAN
),
695 hp_wmi_get_hw_state(HPWMI_WWAN
));
700 static int __init
hp_wmi_init(void)
703 int event_capable
= wmi_has_guid(HPWMI_EVENT_GUID
);
704 int bios_capable
= wmi_has_guid(HPWMI_BIOS_GUID
);
707 err
= wmi_install_notify_handler(HPWMI_EVENT_GUID
,
708 hp_wmi_notify
, NULL
);
709 if (ACPI_FAILURE(err
))
711 err
= hp_wmi_input_setup();
713 wmi_remove_notify_handler(HPWMI_EVENT_GUID
);
719 err
= platform_driver_register(&hp_wmi_driver
);
722 hp_wmi_platform_dev
= platform_device_alloc("hp-wmi", -1);
723 if (!hp_wmi_platform_dev
) {
725 goto err_device_alloc
;
727 err
= platform_device_add(hp_wmi_platform_dev
);
732 if (!bios_capable
&& !event_capable
)
738 platform_device_put(hp_wmi_platform_dev
);
740 platform_driver_unregister(&hp_wmi_driver
);
742 if (wmi_has_guid(HPWMI_EVENT_GUID
)) {
743 input_unregister_device(hp_wmi_input_dev
);
744 wmi_remove_notify_handler(HPWMI_EVENT_GUID
);
750 static void __exit
hp_wmi_exit(void)
752 if (wmi_has_guid(HPWMI_EVENT_GUID
)) {
753 wmi_remove_notify_handler(HPWMI_EVENT_GUID
);
754 input_unregister_device(hp_wmi_input_dev
);
756 if (hp_wmi_platform_dev
) {
757 platform_device_unregister(hp_wmi_platform_dev
);
758 platform_driver_unregister(&hp_wmi_driver
);
762 module_init(hp_wmi_init
);
763 module_exit(hp_wmi_exit
);