4 * Copyright (C) 2008 Red Hat <mjg@redhat.com>
5 * Copyright (C) 2010, 2011 Anssi Hannula <anssi.hannula@iki.fi>
7 * Portions based on wistron_btns.c:
8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/init.h>
30 #include <linux/slab.h>
31 #include <linux/types.h>
32 #include <linux/input.h>
33 #include <linux/input/sparse-keymap.h>
34 #include <linux/platform_device.h>
35 #include <linux/acpi.h>
36 #include <linux/rfkill.h>
37 #include <linux/string.h>
39 MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
40 MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
41 MODULE_LICENSE("GPL");
43 MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
44 MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
46 #define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
47 #define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
49 #define HPWMI_DISPLAY_QUERY 0x1
50 #define HPWMI_HDDTEMP_QUERY 0x2
51 #define HPWMI_ALS_QUERY 0x3
52 #define HPWMI_HARDWARE_QUERY 0x4
53 #define HPWMI_WIRELESS_QUERY 0x5
54 #define HPWMI_HOTKEY_QUERY 0xc
55 #define HPWMI_WIRELESS2_QUERY 0x1b
57 #define PREFIX "HP WMI: "
58 #define UNIMP "Unimplemented "
66 enum hp_wmi_event_ids {
69 HPWMI_SMART_ADAPTER = 3,
70 HPWMI_BEZEL_BUTTON = 4,
72 HPWMI_CPU_BATTERY_THROTTLE = 6,
73 HPWMI_LOCK_SWITCH = 7,
76 static int __devinit hp_wmi_bios_setup(struct platform_device *device);
77 static int __exit hp_wmi_bios_remove(struct platform_device *device);
78 static int hp_wmi_resume_handler(struct device *device);
93 enum hp_return_value {
94 HPWMI_RET_WRONG_SIGNATURE = 0x02,
95 HPWMI_RET_UNKNOWN_COMMAND = 0x03,
96 HPWMI_RET_UNKNOWN_CMDTYPE = 0x04,
97 HPWMI_RET_INVALID_PARAMETERS = 0x05,
100 enum hp_wireless2_bits {
101 HPWMI_POWER_STATE = 0x01,
102 HPWMI_POWER_SOFT = 0x02,
103 HPWMI_POWER_BIOS = 0x04,
104 HPWMI_POWER_HARD = 0x08,
107 #define IS_HWBLOCKED(x) ((x & (HPWMI_POWER_BIOS | HPWMI_POWER_HARD)) \
108 != (HPWMI_POWER_BIOS | HPWMI_POWER_HARD))
109 #define IS_SWBLOCKED(x) !(x & HPWMI_POWER_SOFT)
111 struct bios_rfkill2_device_state {
116 u16 subsys_vendor_id;
117 u16 subsys_product_id;
123 /* 7 devices fit into the 128 byte buffer */
124 #define HPWMI_MAX_RFKILL2_DEVICES 7
126 struct bios_rfkill2_state {
130 struct bios_rfkill2_device_state device[HPWMI_MAX_RFKILL2_DEVICES];
133 static const struct key_entry hp_wmi_keymap[] = {
134 { KE_KEY, 0x02, { KEY_BRIGHTNESSUP } },
135 { KE_KEY, 0x03, { KEY_BRIGHTNESSDOWN } },
136 { KE_KEY, 0x20e6, { KEY_PROG1 } },
137 { KE_KEY, 0x20e8, { KEY_MEDIA } },
138 { KE_KEY, 0x2142, { KEY_MEDIA } },
139 { KE_KEY, 0x213b, { KEY_INFO } },
140 { KE_KEY, 0x2169, { KEY_DIRECTION } },
141 { KE_KEY, 0x231b, { KEY_HELP } },
145 static struct input_dev *hp_wmi_input_dev;
146 static struct platform_device *hp_wmi_platform_dev;
148 static struct rfkill *wifi_rfkill;
149 static struct rfkill *bluetooth_rfkill;
150 static struct rfkill *wwan_rfkill;
152 struct rfkill2_device {
155 struct rfkill *rfkill;
158 static int rfkill2_count;
159 static struct rfkill2_device rfkill2[HPWMI_MAX_RFKILL2_DEVICES];
161 static const struct dev_pm_ops hp_wmi_pm_ops = {
162 .resume = hp_wmi_resume_handler,
163 .restore = hp_wmi_resume_handler,
166 static struct platform_driver hp_wmi_driver = {
169 .owner = THIS_MODULE,
170 .pm = &hp_wmi_pm_ops,
172 .probe = hp_wmi_bios_setup,
173 .remove = hp_wmi_bios_remove,
177 * hp_wmi_perform_query
179 * query: The commandtype -> What should be queried
180 * write: The command -> 0 read, 1 write, 3 ODM specific
181 * buffer: Buffer used as input and/or output
182 * insize: Size of input buffer
183 * outsize: Size of output buffer
185 * returns zero on success
186 * an HP WMI query specific error code (which is positive)
187 * -EINVAL if the query was not successful at all
188 * -EINVAL if the output buffer size exceeds buffersize
190 * Note: The buffersize must at least be the maximum of the input and output
191 * size. E.g. Battery info query (0x7) is defined to have 1 byte input
192 * and 128 byte output. The caller would do:
193 * buffer = kzalloc(128, GFP_KERNEL);
194 * ret = hp_wmi_perform_query(0x7, 0, buffer, 1, 128)
196 static int hp_wmi_perform_query(int query, int write, void *buffer,
197 int insize, int outsize)
199 struct bios_return *bios_return;
201 union acpi_object *obj;
202 struct bios_args args = {
203 .signature = 0x55434553,
204 .command = write ? 0x2 : 0x1,
205 .commandtype = query,
209 struct acpi_buffer input = { sizeof(struct bios_args), &args };
210 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
212 if (WARN_ON(insize > sizeof(args.data)))
214 memcpy(&args.data, buffer, insize);
216 wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
218 obj = output.pointer;
222 else if (obj->type != ACPI_TYPE_BUFFER) {
227 bios_return = (struct bios_return *)obj->buffer.pointer;
229 if (bios_return->return_code) {
230 if (bios_return->return_code != HPWMI_RET_UNKNOWN_CMDTYPE)
231 printk(KERN_WARNING PREFIX "query 0x%x returned "
233 query, bios_return->return_code);
235 return bios_return->return_code;
239 /* ignore output data */
244 actual_outsize = min(outsize, (int)(obj->buffer.length - sizeof(*bios_return)));
245 memcpy(buffer, obj->buffer.pointer + sizeof(*bios_return), actual_outsize);
246 memset(buffer + actual_outsize, 0, outsize - actual_outsize);
251 static int hp_wmi_display_state(void)
254 int ret = hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, &state,
255 sizeof(state), sizeof(state));
261 static int hp_wmi_hddtemp_state(void)
264 int ret = hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, &state,
265 sizeof(state), sizeof(state));
271 static int hp_wmi_als_state(void)
274 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, &state,
275 sizeof(state), sizeof(state));
281 static int hp_wmi_dock_state(void)
284 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
285 sizeof(state), sizeof(state));
293 static int hp_wmi_tablet_state(void)
296 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, &state,
297 sizeof(state), sizeof(state));
301 return (state & 0x4) ? 1 : 0;
304 static int hp_wmi_set_block(void *data, bool blocked)
306 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
307 int query = BIT(r + 8) | ((!blocked) << r);
310 ret = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1,
311 &query, sizeof(query), 0);
317 static const struct rfkill_ops hp_wmi_rfkill_ops = {
318 .set_block = hp_wmi_set_block,
321 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
325 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
326 &wireless, sizeof(wireless),
328 /* TBD: Pass error */
330 mask = 0x200 << (r * 8);
338 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
342 hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0,
343 &wireless, sizeof(wireless),
345 /* TBD: Pass error */
347 mask = 0x800 << (r * 8);
355 static int hp_wmi_rfkill2_set_block(void *data, bool blocked)
357 int rfkill_id = (int)(long)data;
358 char buffer[4] = { 0x01, 0x00, rfkill_id, !blocked };
360 if (hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 1,
361 buffer, sizeof(buffer), 0))
366 static const struct rfkill_ops hp_wmi_rfkill2_ops = {
367 .set_block = hp_wmi_rfkill2_set_block,
370 static int hp_wmi_rfkill2_refresh(void)
373 struct bios_rfkill2_state state;
375 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
380 for (i = 0; i < rfkill2_count; i++) {
381 int num = rfkill2[i].num;
382 struct bios_rfkill2_device_state *devstate;
383 devstate = &state.device[num];
385 if (num >= state.count ||
386 devstate->rfkill_id != rfkill2[i].id) {
387 printk(KERN_WARNING PREFIX "power configuration of "
388 "the wireless devices unexpectedly changed\n");
392 rfkill_set_states(rfkill2[i].rfkill,
393 IS_SWBLOCKED(devstate->power),
394 IS_HWBLOCKED(devstate->power));
400 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
403 int value = hp_wmi_display_state();
406 return sprintf(buf, "%d\n", value);
409 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
412 int value = hp_wmi_hddtemp_state();
415 return sprintf(buf, "%d\n", value);
418 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
421 int value = hp_wmi_als_state();
424 return sprintf(buf, "%d\n", value);
427 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
430 int value = hp_wmi_dock_state();
433 return sprintf(buf, "%d\n", value);
436 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
439 int value = hp_wmi_tablet_state();
442 return sprintf(buf, "%d\n", value);
445 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
446 const char *buf, size_t count)
448 u32 tmp = simple_strtoul(buf, NULL, 10);
449 int ret = hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, &tmp,
450 sizeof(tmp), sizeof(tmp));
457 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
458 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
459 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
460 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
461 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
463 static void hp_wmi_notify(u32 value, void *context)
465 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
466 union acpi_object *obj;
467 u32 event_id, event_data;
468 int key_code = 0, ret;
472 status = wmi_get_event_data(value, &response);
473 if (status != AE_OK) {
474 printk(KERN_INFO PREFIX "bad event status 0x%x\n", status);
478 obj = (union acpi_object *)response.pointer;
482 if (obj->type != ACPI_TYPE_BUFFER) {
483 printk(KERN_INFO "hp-wmi: Unknown response received %d\n",
490 * Depending on ACPI version the concatenation of id and event data
491 * inside _WED function will result in a 8 or 16 byte buffer.
493 location = (u32 *)obj->buffer.pointer;
494 if (obj->buffer.length == 8) {
495 event_id = *location;
496 event_data = *(location + 1);
497 } else if (obj->buffer.length == 16) {
498 event_id = *location;
499 event_data = *(location + 2);
501 printk(KERN_INFO "hp-wmi: Unknown buffer length %d\n",
509 case HPWMI_DOCK_EVENT:
510 input_report_switch(hp_wmi_input_dev, SW_DOCK,
511 hp_wmi_dock_state());
512 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
513 hp_wmi_tablet_state());
514 input_sync(hp_wmi_input_dev);
518 case HPWMI_SMART_ADAPTER:
520 case HPWMI_BEZEL_BUTTON:
521 ret = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
528 if (!sparse_keymap_report_event(hp_wmi_input_dev,
530 printk(KERN_INFO PREFIX "Unknown key code - 0x%x\n",
535 hp_wmi_rfkill2_refresh();
540 rfkill_set_states(wifi_rfkill,
541 hp_wmi_get_sw_state(HPWMI_WIFI),
542 hp_wmi_get_hw_state(HPWMI_WIFI));
543 if (bluetooth_rfkill)
544 rfkill_set_states(bluetooth_rfkill,
545 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
546 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
548 rfkill_set_states(wwan_rfkill,
549 hp_wmi_get_sw_state(HPWMI_WWAN),
550 hp_wmi_get_hw_state(HPWMI_WWAN));
552 case HPWMI_CPU_BATTERY_THROTTLE:
553 printk(KERN_INFO PREFIX UNIMP "CPU throttle because of 3 Cell"
554 " battery event detected\n");
556 case HPWMI_LOCK_SWITCH:
559 printk(KERN_INFO PREFIX "Unknown event_id - %d - 0x%x\n",
560 event_id, event_data);
565 static int __init hp_wmi_input_setup(void)
570 hp_wmi_input_dev = input_allocate_device();
571 if (!hp_wmi_input_dev)
574 hp_wmi_input_dev->name = "HP WMI hotkeys";
575 hp_wmi_input_dev->phys = "wmi/input0";
576 hp_wmi_input_dev->id.bustype = BUS_HOST;
578 __set_bit(EV_SW, hp_wmi_input_dev->evbit);
579 __set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
580 __set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
582 err = sparse_keymap_setup(hp_wmi_input_dev, hp_wmi_keymap, NULL);
586 /* Set initial hardware state */
587 input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
588 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
589 hp_wmi_tablet_state());
590 input_sync(hp_wmi_input_dev);
592 status = wmi_install_notify_handler(HPWMI_EVENT_GUID, hp_wmi_notify, NULL);
593 if (ACPI_FAILURE(status)) {
595 goto err_free_keymap;
598 err = input_register_device(hp_wmi_input_dev);
600 goto err_uninstall_notifier;
604 err_uninstall_notifier:
605 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
607 sparse_keymap_free(hp_wmi_input_dev);
609 input_free_device(hp_wmi_input_dev);
613 static void hp_wmi_input_destroy(void)
615 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
616 sparse_keymap_free(hp_wmi_input_dev);
617 input_unregister_device(hp_wmi_input_dev);
620 static void cleanup_sysfs(struct platform_device *device)
622 device_remove_file(&device->dev, &dev_attr_display);
623 device_remove_file(&device->dev, &dev_attr_hddtemp);
624 device_remove_file(&device->dev, &dev_attr_als);
625 device_remove_file(&device->dev, &dev_attr_dock);
626 device_remove_file(&device->dev, &dev_attr_tablet);
629 static int __devinit hp_wmi_rfkill_setup(struct platform_device *device)
634 err = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, &wireless,
635 sizeof(wireless), sizeof(wireless));
639 if (wireless & 0x1) {
640 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
643 (void *) HPWMI_WIFI);
644 rfkill_init_sw_state(wifi_rfkill,
645 hp_wmi_get_sw_state(HPWMI_WIFI));
646 rfkill_set_hw_state(wifi_rfkill,
647 hp_wmi_get_hw_state(HPWMI_WIFI));
648 err = rfkill_register(wifi_rfkill);
650 goto register_wifi_error;
653 if (wireless & 0x2) {
654 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
655 RFKILL_TYPE_BLUETOOTH,
657 (void *) HPWMI_BLUETOOTH);
658 rfkill_init_sw_state(bluetooth_rfkill,
659 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
660 rfkill_set_hw_state(bluetooth_rfkill,
661 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
662 err = rfkill_register(bluetooth_rfkill);
664 goto register_bluetooth_error;
667 if (wireless & 0x4) {
668 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
671 (void *) HPWMI_WWAN);
672 rfkill_init_sw_state(wwan_rfkill,
673 hp_wmi_get_sw_state(HPWMI_WWAN));
674 rfkill_set_hw_state(wwan_rfkill,
675 hp_wmi_get_hw_state(HPWMI_WWAN));
676 err = rfkill_register(wwan_rfkill);
678 goto register_wwan_err;
683 rfkill_destroy(wwan_rfkill);
685 if (bluetooth_rfkill)
686 rfkill_unregister(bluetooth_rfkill);
687 register_bluetooth_error:
688 rfkill_destroy(bluetooth_rfkill);
689 bluetooth_rfkill = NULL;
691 rfkill_unregister(wifi_rfkill);
693 rfkill_destroy(wifi_rfkill);
698 static int __devinit hp_wmi_rfkill2_setup(struct platform_device *device)
701 struct bios_rfkill2_state state;
702 err = hp_wmi_perform_query(HPWMI_WIRELESS2_QUERY, 0, &state,
707 if (state.count > HPWMI_MAX_RFKILL2_DEVICES) {
708 printk(KERN_WARNING PREFIX "unable to parse 0x1b query output\n");
712 for (i = 0; i < state.count; i++) {
713 struct rfkill *rfkill;
714 enum rfkill_type type;
716 switch (state.device[i].radio_type) {
718 type = RFKILL_TYPE_WLAN;
721 case HPWMI_BLUETOOTH:
722 type = RFKILL_TYPE_BLUETOOTH;
723 name = "hp-bluetooth";
726 type = RFKILL_TYPE_WWAN;
730 printk(KERN_WARNING PREFIX "unknown device type 0x%x\n",
731 state.device[i].radio_type);
735 if (!state.device[i].vendor_id) {
736 printk(KERN_WARNING PREFIX "zero device %d while %d "
737 "reported\n", i, state.count);
741 rfkill = rfkill_alloc(name, &device->dev, type,
742 &hp_wmi_rfkill2_ops, (void *)(long)i);
748 rfkill2[rfkill2_count].id = state.device[i].rfkill_id;
749 rfkill2[rfkill2_count].num = i;
750 rfkill2[rfkill2_count].rfkill = rfkill;
752 rfkill_init_sw_state(rfkill,
753 IS_SWBLOCKED(state.device[i].power));
754 rfkill_set_hw_state(rfkill,
755 IS_HWBLOCKED(state.device[i].power));
757 if (!(state.device[i].power & HPWMI_POWER_BIOS))
758 printk(KERN_INFO PREFIX "device %s blocked by BIOS\n",
761 err = rfkill_register(rfkill);
763 rfkill_destroy(rfkill);
772 for (; rfkill2_count > 0; rfkill2_count--) {
773 rfkill_unregister(rfkill2[rfkill2_count - 1].rfkill);
774 rfkill_destroy(rfkill2[rfkill2_count - 1].rfkill);
779 static int __devinit hp_wmi_bios_setup(struct platform_device *device)
783 /* clear detected rfkill devices */
785 bluetooth_rfkill = NULL;
789 if (hp_wmi_rfkill_setup(device))
790 hp_wmi_rfkill2_setup(device);
792 err = device_create_file(&device->dev, &dev_attr_display);
794 goto add_sysfs_error;
795 err = device_create_file(&device->dev, &dev_attr_hddtemp);
797 goto add_sysfs_error;
798 err = device_create_file(&device->dev, &dev_attr_als);
800 goto add_sysfs_error;
801 err = device_create_file(&device->dev, &dev_attr_dock);
803 goto add_sysfs_error;
804 err = device_create_file(&device->dev, &dev_attr_tablet);
806 goto add_sysfs_error;
810 cleanup_sysfs(device);
814 static int __exit hp_wmi_bios_remove(struct platform_device *device)
817 cleanup_sysfs(device);
819 for (i = 0; i < rfkill2_count; i++) {
820 rfkill_unregister(rfkill2[i].rfkill);
821 rfkill_destroy(rfkill2[i].rfkill);
825 rfkill_unregister(wifi_rfkill);
826 rfkill_destroy(wifi_rfkill);
828 if (bluetooth_rfkill) {
829 rfkill_unregister(bluetooth_rfkill);
830 rfkill_destroy(bluetooth_rfkill);
833 rfkill_unregister(wwan_rfkill);
834 rfkill_destroy(wwan_rfkill);
840 static int hp_wmi_resume_handler(struct device *device)
843 * Hardware state may have changed while suspended, so trigger
844 * input events for the current state. As this is a switch,
845 * the input layer will only actually pass it on if the state
848 if (hp_wmi_input_dev) {
849 input_report_switch(hp_wmi_input_dev, SW_DOCK,
850 hp_wmi_dock_state());
851 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
852 hp_wmi_tablet_state());
853 input_sync(hp_wmi_input_dev);
857 hp_wmi_rfkill2_refresh();
860 rfkill_set_states(wifi_rfkill,
861 hp_wmi_get_sw_state(HPWMI_WIFI),
862 hp_wmi_get_hw_state(HPWMI_WIFI));
863 if (bluetooth_rfkill)
864 rfkill_set_states(bluetooth_rfkill,
865 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
866 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
868 rfkill_set_states(wwan_rfkill,
869 hp_wmi_get_sw_state(HPWMI_WWAN),
870 hp_wmi_get_hw_state(HPWMI_WWAN));
875 static int __init hp_wmi_init(void)
878 int event_capable = wmi_has_guid(HPWMI_EVENT_GUID);
879 int bios_capable = wmi_has_guid(HPWMI_BIOS_GUID);
882 err = hp_wmi_input_setup();
888 err = platform_driver_register(&hp_wmi_driver);
891 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
892 if (!hp_wmi_platform_dev) {
894 goto err_device_alloc;
896 err = platform_device_add(hp_wmi_platform_dev);
901 if (!bios_capable && !event_capable)
907 platform_device_put(hp_wmi_platform_dev);
909 platform_driver_unregister(&hp_wmi_driver);
912 hp_wmi_input_destroy();
917 static void __exit hp_wmi_exit(void)
919 if (wmi_has_guid(HPWMI_EVENT_GUID))
920 hp_wmi_input_destroy();
922 if (hp_wmi_platform_dev) {
923 platform_device_unregister(hp_wmi_platform_dev);
924 platform_driver_unregister(&hp_wmi_driver);
928 module_init(hp_wmi_init);
929 module_exit(hp_wmi_exit);