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/types.h>
30 #include <linux/input.h>
31 #include <acpi/acpi_drivers.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
60 static int __init hp_wmi_bios_setup(struct platform_device *device);
61 static int __exit hp_wmi_bios_remove(struct platform_device *device);
62 static int hp_wmi_resume_handler(struct device *device);
79 char type; /* See KE_* below */
84 enum { KE_KEY, KE_END };
86 static struct key_entry hp_wmi_keymap[] = {
87 {KE_KEY, 0x02, KEY_BRIGHTNESSUP},
88 {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
89 {KE_KEY, 0x20e6, KEY_PROG1},
90 {KE_KEY, 0x2142, KEY_MEDIA},
91 {KE_KEY, 0x213b, KEY_INFO},
92 {KE_KEY, 0x231b, KEY_HELP},
96 static struct input_dev *hp_wmi_input_dev;
97 static struct platform_device *hp_wmi_platform_dev;
99 static struct rfkill *wifi_rfkill;
100 static struct rfkill *bluetooth_rfkill;
101 static struct rfkill *wwan_rfkill;
103 static const struct dev_pm_ops hp_wmi_pm_ops = {
104 .resume = hp_wmi_resume_handler,
105 .restore = hp_wmi_resume_handler,
108 static struct platform_driver hp_wmi_driver = {
111 .owner = THIS_MODULE,
112 .pm = &hp_wmi_pm_ops,
114 .probe = hp_wmi_bios_setup,
115 .remove = hp_wmi_bios_remove,
118 static int hp_wmi_perform_query(int query, int write, int value)
120 struct bios_return bios_return;
122 union acpi_object *obj;
123 struct bios_args args = {
124 .signature = 0x55434553,
125 .command = write ? 0x2 : 0x1,
126 .commandtype = query,
127 .datasize = write ? 0x4 : 0,
130 struct acpi_buffer input = { sizeof(struct bios_args), &args };
131 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
133 status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
135 obj = output.pointer;
139 else if (obj->type != ACPI_TYPE_BUFFER) {
144 bios_return = *((struct bios_return *)obj->buffer.pointer);
146 if (bios_return.return_code > 0)
147 return bios_return.return_code * -1;
149 return bios_return.value;
152 static int hp_wmi_display_state(void)
154 return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
157 static int hp_wmi_hddtemp_state(void)
159 return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
162 static int hp_wmi_als_state(void)
164 return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
167 static int hp_wmi_dock_state(void)
169 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
177 static int hp_wmi_tablet_state(void)
179 int ret = hp_wmi_perform_query(HPWMI_HARDWARE_QUERY, 0, 0);
184 return (ret & 0x4) ? 1 : 0;
187 static int hp_wmi_set_block(void *data, bool blocked)
189 enum hp_wmi_radio r = (enum hp_wmi_radio) data;
190 int query = BIT(r + 8) | ((!blocked) << r);
192 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, query);
195 static const struct rfkill_ops hp_wmi_rfkill_ops = {
196 .set_block = hp_wmi_set_block,
199 static bool hp_wmi_get_sw_state(enum hp_wmi_radio r)
201 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
202 int mask = 0x200 << (r * 8);
210 static bool hp_wmi_get_hw_state(enum hp_wmi_radio r)
212 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
213 int mask = 0x800 << (r * 8);
221 static ssize_t show_display(struct device *dev, struct device_attribute *attr,
224 int value = hp_wmi_display_state();
227 return sprintf(buf, "%d\n", value);
230 static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
233 int value = hp_wmi_hddtemp_state();
236 return sprintf(buf, "%d\n", value);
239 static ssize_t show_als(struct device *dev, struct device_attribute *attr,
242 int value = hp_wmi_als_state();
245 return sprintf(buf, "%d\n", value);
248 static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
251 int value = hp_wmi_dock_state();
254 return sprintf(buf, "%d\n", value);
257 static ssize_t show_tablet(struct device *dev, struct device_attribute *attr,
260 int value = hp_wmi_tablet_state();
263 return sprintf(buf, "%d\n", value);
266 static ssize_t set_als(struct device *dev, struct device_attribute *attr,
267 const char *buf, size_t count)
269 u32 tmp = simple_strtoul(buf, NULL, 10);
270 hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
274 static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
275 static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
276 static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
277 static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
278 static DEVICE_ATTR(tablet, S_IRUGO, show_tablet, NULL);
280 static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
282 struct key_entry *key;
284 for (key = hp_wmi_keymap; key->type != KE_END; key++)
285 if (code == key->code)
291 static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
293 struct key_entry *key;
295 for (key = hp_wmi_keymap; key->type != KE_END; key++)
296 if (key->type == KE_KEY && keycode == key->keycode)
302 static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
304 struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
306 if (key && key->type == KE_KEY) {
307 *keycode = key->keycode;
314 static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
316 struct key_entry *key;
319 if (keycode < 0 || keycode > KEY_MAX)
322 key = hp_wmi_get_entry_by_scancode(scancode);
323 if (key && key->type == KE_KEY) {
324 old_keycode = key->keycode;
325 key->keycode = keycode;
326 set_bit(keycode, dev->keybit);
327 if (!hp_wmi_get_entry_by_keycode(old_keycode))
328 clear_bit(old_keycode, dev->keybit);
335 static void hp_wmi_notify(u32 value, void *context)
337 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
338 static struct key_entry *key;
339 union acpi_object *obj;
343 status = wmi_get_event_data(value, &response);
344 if (status != AE_OK) {
345 printk(KERN_INFO "hp-wmi: bad event status 0x%x\n", status);
349 obj = (union acpi_object *)response.pointer;
351 if (!obj || obj->type != ACPI_TYPE_BUFFER || obj->buffer.length != 8) {
352 printk(KERN_INFO "HP WMI: Unknown response received\n");
357 eventcode = *((u8 *) obj->buffer.pointer);
359 if (eventcode == 0x4)
360 eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
362 key = hp_wmi_get_entry_by_scancode(eventcode);
366 input_report_key(hp_wmi_input_dev,
368 input_sync(hp_wmi_input_dev);
369 input_report_key(hp_wmi_input_dev,
371 input_sync(hp_wmi_input_dev);
374 } else if (eventcode == 0x1) {
375 input_report_switch(hp_wmi_input_dev, SW_DOCK,
376 hp_wmi_dock_state());
377 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
378 hp_wmi_tablet_state());
379 input_sync(hp_wmi_input_dev);
380 } else if (eventcode == 0x5) {
382 rfkill_set_states(wifi_rfkill,
383 hp_wmi_get_sw_state(HPWMI_WIFI),
384 hp_wmi_get_hw_state(HPWMI_WIFI));
385 if (bluetooth_rfkill)
386 rfkill_set_states(bluetooth_rfkill,
387 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
388 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
390 rfkill_set_states(wwan_rfkill,
391 hp_wmi_get_sw_state(HPWMI_WWAN),
392 hp_wmi_get_hw_state(HPWMI_WWAN));
394 printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
400 static int __init hp_wmi_input_setup(void)
402 struct key_entry *key;
405 hp_wmi_input_dev = input_allocate_device();
407 hp_wmi_input_dev->name = "HP WMI hotkeys";
408 hp_wmi_input_dev->phys = "wmi/input0";
409 hp_wmi_input_dev->id.bustype = BUS_HOST;
410 hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
411 hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
413 for (key = hp_wmi_keymap; key->type != KE_END; key++) {
416 set_bit(EV_KEY, hp_wmi_input_dev->evbit);
417 set_bit(key->keycode, hp_wmi_input_dev->keybit);
422 set_bit(EV_SW, hp_wmi_input_dev->evbit);
423 set_bit(SW_DOCK, hp_wmi_input_dev->swbit);
424 set_bit(SW_TABLET_MODE, hp_wmi_input_dev->swbit);
426 /* Set initial hardware state */
427 input_report_switch(hp_wmi_input_dev, SW_DOCK, hp_wmi_dock_state());
428 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
429 hp_wmi_tablet_state());
430 input_sync(hp_wmi_input_dev);
432 err = input_register_device(hp_wmi_input_dev);
435 input_free_device(hp_wmi_input_dev);
442 static void cleanup_sysfs(struct platform_device *device)
444 device_remove_file(&device->dev, &dev_attr_display);
445 device_remove_file(&device->dev, &dev_attr_hddtemp);
446 device_remove_file(&device->dev, &dev_attr_als);
447 device_remove_file(&device->dev, &dev_attr_dock);
448 device_remove_file(&device->dev, &dev_attr_tablet);
451 static int __init hp_wmi_bios_setup(struct platform_device *device)
454 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
456 err = device_create_file(&device->dev, &dev_attr_display);
458 goto add_sysfs_error;
459 err = device_create_file(&device->dev, &dev_attr_hddtemp);
461 goto add_sysfs_error;
462 err = device_create_file(&device->dev, &dev_attr_als);
464 goto add_sysfs_error;
465 err = device_create_file(&device->dev, &dev_attr_dock);
467 goto add_sysfs_error;
468 err = device_create_file(&device->dev, &dev_attr_tablet);
470 goto add_sysfs_error;
472 if (wireless & 0x1) {
473 wifi_rfkill = rfkill_alloc("hp-wifi", &device->dev,
476 (void *) HPWMI_WIFI);
477 rfkill_init_sw_state(wifi_rfkill,
478 hp_wmi_get_sw_state(HPWMI_WIFI));
479 rfkill_set_hw_state(wifi_rfkill,
480 hp_wmi_get_hw_state(HPWMI_WIFI));
481 err = rfkill_register(wifi_rfkill);
483 goto register_wifi_error;
486 if (wireless & 0x2) {
487 bluetooth_rfkill = rfkill_alloc("hp-bluetooth", &device->dev,
488 RFKILL_TYPE_BLUETOOTH,
490 (void *) HPWMI_BLUETOOTH);
491 rfkill_init_sw_state(bluetooth_rfkill,
492 hp_wmi_get_sw_state(HPWMI_BLUETOOTH));
493 rfkill_set_hw_state(bluetooth_rfkill,
494 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
495 err = rfkill_register(bluetooth_rfkill);
497 goto register_bluetooth_error;
500 if (wireless & 0x4) {
501 wwan_rfkill = rfkill_alloc("hp-wwan", &device->dev,
504 (void *) HPWMI_WWAN);
505 rfkill_init_sw_state(wwan_rfkill,
506 hp_wmi_get_sw_state(HPWMI_WWAN));
507 rfkill_set_hw_state(wwan_rfkill,
508 hp_wmi_get_hw_state(HPWMI_WWAN));
509 err = rfkill_register(wwan_rfkill);
511 goto register_wwan_err;
516 rfkill_destroy(wwan_rfkill);
517 if (bluetooth_rfkill)
518 rfkill_unregister(bluetooth_rfkill);
519 register_bluetooth_error:
520 rfkill_destroy(bluetooth_rfkill);
522 rfkill_unregister(wifi_rfkill);
524 rfkill_destroy(wifi_rfkill);
526 cleanup_sysfs(device);
530 static int __exit hp_wmi_bios_remove(struct platform_device *device)
532 cleanup_sysfs(device);
535 rfkill_unregister(wifi_rfkill);
536 rfkill_destroy(wifi_rfkill);
538 if (bluetooth_rfkill) {
539 rfkill_unregister(bluetooth_rfkill);
540 rfkill_destroy(bluetooth_rfkill);
543 rfkill_unregister(wwan_rfkill);
544 rfkill_destroy(wwan_rfkill);
550 static int hp_wmi_resume_handler(struct device *device)
553 * Hardware state may have changed while suspended, so trigger
554 * input events for the current state. As this is a switch,
555 * the input layer will only actually pass it on if the state
558 if (hp_wmi_input_dev) {
559 input_report_switch(hp_wmi_input_dev, SW_DOCK,
560 hp_wmi_dock_state());
561 input_report_switch(hp_wmi_input_dev, SW_TABLET_MODE,
562 hp_wmi_tablet_state());
563 input_sync(hp_wmi_input_dev);
567 rfkill_set_states(wifi_rfkill,
568 hp_wmi_get_sw_state(HPWMI_WIFI),
569 hp_wmi_get_hw_state(HPWMI_WIFI));
570 if (bluetooth_rfkill)
571 rfkill_set_states(bluetooth_rfkill,
572 hp_wmi_get_sw_state(HPWMI_BLUETOOTH),
573 hp_wmi_get_hw_state(HPWMI_BLUETOOTH));
575 rfkill_set_states(wwan_rfkill,
576 hp_wmi_get_sw_state(HPWMI_WWAN),
577 hp_wmi_get_hw_state(HPWMI_WWAN));
582 static int __init hp_wmi_init(void)
586 if (wmi_has_guid(HPWMI_EVENT_GUID)) {
587 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
588 hp_wmi_notify, NULL);
589 if (ACPI_SUCCESS(err))
590 hp_wmi_input_setup();
593 if (wmi_has_guid(HPWMI_BIOS_GUID)) {
594 err = platform_driver_register(&hp_wmi_driver);
597 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
598 if (!hp_wmi_platform_dev) {
599 platform_driver_unregister(&hp_wmi_driver);
602 platform_device_add(hp_wmi_platform_dev);
608 static void __exit hp_wmi_exit(void)
610 if (wmi_has_guid(HPWMI_EVENT_GUID)) {
611 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
612 input_unregister_device(hp_wmi_input_dev);
614 if (hp_wmi_platform_dev) {
615 platform_device_del(hp_wmi_platform_dev);
616 platform_driver_unregister(&hp_wmi_driver);
620 module_init(hp_wmi_init);
621 module_exit(hp_wmi_exit);