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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>
36
37MODULE_AUTHOR("Matthew Garrett <mjg59@srcf.ucam.org>");
38MODULE_DESCRIPTION("HP laptop WMI hotkeys driver");
39MODULE_LICENSE("GPL");
40
41MODULE_ALIAS("wmi:95F24279-4D7B-4334-9387-ACCDC67EF61C");
42MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
43
44#define HPWMI_EVENT_GUID "95F24279-4D7B-4334-9387-ACCDC67EF61C"
45#define HPWMI_BIOS_GUID "5FB7F034-2C63-45e9-BE91-3D44E2C707E4"
46
47#define HPWMI_DISPLAY_QUERY 0x1
48#define HPWMI_HDDTEMP_QUERY 0x2
49#define HPWMI_ALS_QUERY 0x3
50#define HPWMI_DOCK_QUERY 0x4
51#define HPWMI_WIRELESS_QUERY 0x5
52#define HPWMI_HOTKEY_QUERY 0xc
53
54static int __init hp_wmi_bios_setup(struct platform_device *device);
55static int __exit hp_wmi_bios_remove(struct platform_device *device);
56
57struct bios_args {
58 u32 signature;
59 u32 command;
60 u32 commandtype;
61 u32 datasize;
62 u32 data;
63};
64
65struct bios_return {
66 u32 sigpass;
67 u32 return_code;
68 u32 value;
69};
70
71struct key_entry {
72 char type;
73 u16 code;
74 u16 keycode;
75};
76
77enum { KE_KEY, KE_SW, KE_END };
78
79static struct key_entry hp_wmi_keymap[] = {
80 {KE_SW, 0x01, SW_DOCK},
81 {KE_KEY, 0x02, KEY_BRIGHTNESSUP},
82 {KE_KEY, 0x03, KEY_BRIGHTNESSDOWN},
83 {KE_KEY, 0x20e6, KEY_PROG1},
84 {KE_KEY, 0x2142, KEY_MEDIA},
85 {KE_KEY, 0x213b, KEY_INFO},
86 {KE_KEY, 0x231b, KEY_HELP},
87 {KE_END, 0}
88};
89
90static struct input_dev *hp_wmi_input_dev;
91static struct platform_device *hp_wmi_platform_dev;
92
93static struct rfkill *wifi_rfkill;
94static struct rfkill *bluetooth_rfkill;
95static struct rfkill *wwan_rfkill;
96
97static struct platform_driver hp_wmi_driver = {
98 .driver = {
99 .name = "hp-wmi",
100 .owner = THIS_MODULE,
101 },
102 .probe = hp_wmi_bios_setup,
103 .remove = hp_wmi_bios_remove,
104};
105
106static int hp_wmi_perform_query(int query, int write, int value)
107{
108 struct bios_return bios_return;
109 acpi_status status;
110 union acpi_object *obj;
111 struct bios_args args = {
112 .signature = 0x55434553,
113 .command = write ? 0x2 : 0x1,
114 .commandtype = query,
115 .datasize = write ? 0x4 : 0,
116 .data = value,
117 };
118 struct acpi_buffer input = { sizeof(struct bios_args), &args };
119 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
120
121 status = wmi_evaluate_method(HPWMI_BIOS_GUID, 0, 0x3, &input, &output);
122
123 obj = output.pointer;
124
125 if (!obj || obj->type != ACPI_TYPE_BUFFER)
126 return -EINVAL;
127
128 bios_return = *((struct bios_return *)obj->buffer.pointer);
129 if (bios_return.return_code > 0)
130 return bios_return.return_code * -1;
131 else
132 return bios_return.value;
133}
134
135static int hp_wmi_display_state(void)
136{
137 return hp_wmi_perform_query(HPWMI_DISPLAY_QUERY, 0, 0);
138}
139
140static int hp_wmi_hddtemp_state(void)
141{
142 return hp_wmi_perform_query(HPWMI_HDDTEMP_QUERY, 0, 0);
143}
144
145static int hp_wmi_als_state(void)
146{
147 return hp_wmi_perform_query(HPWMI_ALS_QUERY, 0, 0);
148}
149
150static int hp_wmi_dock_state(void)
151{
152 return hp_wmi_perform_query(HPWMI_DOCK_QUERY, 0, 0);
153}
154
155static int hp_wmi_wifi_set(void *data, enum rfkill_state state)
156{
157 if (state)
158 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x101);
159 else
160 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x100);
161}
162
163static int hp_wmi_bluetooth_set(void *data, enum rfkill_state state)
164{
165 if (state)
166 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x202);
167 else
168 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x200);
169}
170
171static int hp_wmi_wwan_set(void *data, enum rfkill_state state)
172{
173 if (state)
174 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x404);
175 else
176 return hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 1, 0x400);
177}
178
179static int hp_wmi_wifi_state(void)
180{
181 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
182
183 if (wireless & 0x100)
184 return RFKILL_STATE_UNBLOCKED;
185 else
186 return RFKILL_STATE_SOFT_BLOCKED;
187}
188
189static int hp_wmi_bluetooth_state(void)
190{
191 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
192
193 if (wireless & 0x10000)
194 return RFKILL_STATE_UNBLOCKED;
195 else
196 return RFKILL_STATE_SOFT_BLOCKED;
197}
198
199static int hp_wmi_wwan_state(void)
200{
201 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
202
203 if (wireless & 0x1000000)
204 return RFKILL_STATE_UNBLOCKED;
205 else
206 return RFKILL_STATE_SOFT_BLOCKED;
207}
208
209static ssize_t show_display(struct device *dev, struct device_attribute *attr,
210 char *buf)
211{
212 int value = hp_wmi_display_state();
213 if (value < 0)
214 return -EINVAL;
215 return sprintf(buf, "%d\n", value);
216}
217
218static ssize_t show_hddtemp(struct device *dev, struct device_attribute *attr,
219 char *buf)
220{
221 int value = hp_wmi_hddtemp_state();
222 if (value < 0)
223 return -EINVAL;
224 return sprintf(buf, "%d\n", value);
225}
226
227static ssize_t show_als(struct device *dev, struct device_attribute *attr,
228 char *buf)
229{
230 int value = hp_wmi_als_state();
231 if (value < 0)
232 return -EINVAL;
233 return sprintf(buf, "%d\n", value);
234}
235
236static ssize_t show_dock(struct device *dev, struct device_attribute *attr,
237 char *buf)
238{
239 int value = hp_wmi_dock_state();
240 if (value < 0)
241 return -EINVAL;
242 return sprintf(buf, "%d\n", value);
243}
244
245static ssize_t set_als(struct device *dev, struct device_attribute *attr,
246 const char *buf, size_t count)
247{
248 u32 tmp = simple_strtoul(buf, NULL, 10);
249 hp_wmi_perform_query(HPWMI_ALS_QUERY, 1, tmp);
250 return count;
251}
252
253static DEVICE_ATTR(display, S_IRUGO, show_display, NULL);
254static DEVICE_ATTR(hddtemp, S_IRUGO, show_hddtemp, NULL);
255static DEVICE_ATTR(als, S_IRUGO | S_IWUSR, show_als, set_als);
256static DEVICE_ATTR(dock, S_IRUGO, show_dock, NULL);
257
258static struct key_entry *hp_wmi_get_entry_by_scancode(int code)
259{
260 struct key_entry *key;
261
262 for (key = hp_wmi_keymap; key->type != KE_END; key++)
263 if (code == key->code)
264 return key;
265
266 return NULL;
267}
268
269static struct key_entry *hp_wmi_get_entry_by_keycode(int keycode)
270{
271 struct key_entry *key;
272
273 for (key = hp_wmi_keymap; key->type != KE_END; key++)
274 if (key->type == KE_KEY && keycode == key->keycode)
275 return key;
276
277 return NULL;
278}
279
280static int hp_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
281{
282 struct key_entry *key = hp_wmi_get_entry_by_scancode(scancode);
283
284 if (key && key->type == KE_KEY) {
285 *keycode = key->keycode;
286 return 0;
287 }
288
289 return -EINVAL;
290}
291
292static int hp_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
293{
294 struct key_entry *key;
295 int old_keycode;
296
297 if (keycode < 0 || keycode > KEY_MAX)
298 return -EINVAL;
299
300 key = hp_wmi_get_entry_by_scancode(scancode);
301 if (key && key->type == KE_KEY) {
302 old_keycode = key->keycode;
303 key->keycode = keycode;
304 set_bit(keycode, dev->keybit);
305 if (!hp_wmi_get_entry_by_keycode(old_keycode))
306 clear_bit(old_keycode, dev->keybit);
307 return 0;
308 }
309
310 return -EINVAL;
311}
312
313static void hp_wmi_notify(u32 value, void *context)
314{
315 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
316 static struct key_entry *key;
317 union acpi_object *obj;
318
319 wmi_get_event_data(value, &response);
320
321 obj = (union acpi_object *)response.pointer;
322
323 if (obj && obj->type == ACPI_TYPE_BUFFER && obj->buffer.length == 8) {
324 int eventcode = *((u8 *) obj->buffer.pointer);
325 if (eventcode == 0x4)
326 eventcode = hp_wmi_perform_query(HPWMI_HOTKEY_QUERY, 0,
327 0);
328 key = hp_wmi_get_entry_by_scancode(eventcode);
329 if (key) {
330 switch (key->type) {
331 case KE_KEY:
332 input_report_key(hp_wmi_input_dev,
333 key->keycode, 1);
334 input_sync(hp_wmi_input_dev);
335 input_report_key(hp_wmi_input_dev,
336 key->keycode, 0);
337 input_sync(hp_wmi_input_dev);
338 break;
339 case KE_SW:
340 input_report_switch(hp_wmi_input_dev,
341 key->keycode,
342 hp_wmi_dock_state());
343 input_sync(hp_wmi_input_dev);
344 break;
345 }
346 } else if (eventcode == 0x5) {
347 if (wifi_rfkill)
348 rfkill_force_state(wifi_rfkill,
349 hp_wmi_wifi_state());
350 if (bluetooth_rfkill)
351 rfkill_force_state(bluetooth_rfkill,
352 hp_wmi_bluetooth_state());
353 if (wwan_rfkill)
354 rfkill_force_state(wwan_rfkill,
355 hp_wmi_wwan_state());
356 } else
357 printk(KERN_INFO "HP WMI: Unknown key pressed - %x\n",
358 eventcode);
359 } else
360 printk(KERN_INFO "HP WMI: Unknown response received\n");
361}
362
363static int __init hp_wmi_input_setup(void)
364{
365 struct key_entry *key;
366 int err;
367
368 hp_wmi_input_dev = input_allocate_device();
369
370 hp_wmi_input_dev->name = "HP WMI hotkeys";
371 hp_wmi_input_dev->phys = "wmi/input0";
372 hp_wmi_input_dev->id.bustype = BUS_HOST;
373 hp_wmi_input_dev->getkeycode = hp_wmi_getkeycode;
374 hp_wmi_input_dev->setkeycode = hp_wmi_setkeycode;
375
376 for (key = hp_wmi_keymap; key->type != KE_END; key++) {
377 switch (key->type) {
378 case KE_KEY:
379 set_bit(EV_KEY, hp_wmi_input_dev->evbit);
380 set_bit(key->keycode, hp_wmi_input_dev->keybit);
381 break;
382 case KE_SW:
383 set_bit(EV_SW, hp_wmi_input_dev->evbit);
384 set_bit(key->keycode, hp_wmi_input_dev->swbit);
385 break;
386 }
387 }
388
389 err = input_register_device(hp_wmi_input_dev);
390
391 if (err) {
392 input_free_device(hp_wmi_input_dev);
393 return err;
394 }
395
396 return 0;
397}
398
399static void cleanup_sysfs(struct platform_device *device)
400{
401 device_remove_file(&device->dev, &dev_attr_display);
402 device_remove_file(&device->dev, &dev_attr_hddtemp);
403 device_remove_file(&device->dev, &dev_attr_als);
404 device_remove_file(&device->dev, &dev_attr_dock);
405}
406
407static int __init hp_wmi_bios_setup(struct platform_device *device)
408{
409 int err;
410 int wireless = hp_wmi_perform_query(HPWMI_WIRELESS_QUERY, 0, 0);
411
412 err = device_create_file(&device->dev, &dev_attr_display);
413 if (err)
414 goto add_sysfs_error;
415 err = device_create_file(&device->dev, &dev_attr_hddtemp);
416 if (err)
417 goto add_sysfs_error;
418 err = device_create_file(&device->dev, &dev_attr_als);
419 if (err)
420 goto add_sysfs_error;
421 err = device_create_file(&device->dev, &dev_attr_dock);
422 if (err)
423 goto add_sysfs_error;
424
425 if (wireless & 0x1) {
426 wifi_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WLAN);
427 wifi_rfkill->name = "hp-wifi";
428 wifi_rfkill->state = hp_wmi_wifi_state();
429 wifi_rfkill->toggle_radio = hp_wmi_wifi_set;
430 wifi_rfkill->user_claim_unsupported = 1;
431 rfkill_register(wifi_rfkill);
432 }
433
434 if (wireless & 0x2) {
435 bluetooth_rfkill = rfkill_allocate(&device->dev,
436 RFKILL_TYPE_BLUETOOTH);
437 bluetooth_rfkill->name = "hp-bluetooth";
438 bluetooth_rfkill->state = hp_wmi_bluetooth_state();
439 bluetooth_rfkill->toggle_radio = hp_wmi_bluetooth_set;
440 bluetooth_rfkill->user_claim_unsupported = 1;
441 rfkill_register(bluetooth_rfkill);
442 }
443
444 if (wireless & 0x4) {
445 wwan_rfkill = rfkill_allocate(&device->dev, RFKILL_TYPE_WWAN);
446 wwan_rfkill->name = "hp-wwan";
447 wwan_rfkill->state = hp_wmi_wwan_state();
448 wwan_rfkill->toggle_radio = hp_wmi_wwan_set;
449 wwan_rfkill->user_claim_unsupported = 1;
450 rfkill_register(wwan_rfkill);
451 }
452
453 return 0;
454add_sysfs_error:
455 cleanup_sysfs(device);
456 return err;
457}
458
459static int __exit hp_wmi_bios_remove(struct platform_device *device)
460{
461 cleanup_sysfs(device);
462
463 if (wifi_rfkill)
464 rfkill_unregister(wifi_rfkill);
465 if (bluetooth_rfkill)
466 rfkill_unregister(bluetooth_rfkill);
467 if (wwan_rfkill)
468 rfkill_unregister(wwan_rfkill);
469
470 return 0;
471}
472
473static int __init hp_wmi_init(void)
474{
475 int err;
476
477 if (wmi_has_guid(HPWMI_EVENT_GUID)) {
478 err = wmi_install_notify_handler(HPWMI_EVENT_GUID,
479 hp_wmi_notify, NULL);
480 if (!err)
481 hp_wmi_input_setup();
482 }
483
484 if (wmi_has_guid(HPWMI_BIOS_GUID)) {
485 err = platform_driver_register(&hp_wmi_driver);
486 if (err)
487 return 0;
488 hp_wmi_platform_dev = platform_device_alloc("hp-wmi", -1);
489 if (!hp_wmi_platform_dev) {
490 platform_driver_unregister(&hp_wmi_driver);
491 return 0;
492 }
493 platform_device_add(hp_wmi_platform_dev);
494 }
495
496 return 0;
497}
498
499static void __exit hp_wmi_exit(void)
500{
501 if (wmi_has_guid(HPWMI_EVENT_GUID)) {
502 wmi_remove_notify_handler(HPWMI_EVENT_GUID);
503 input_unregister_device(hp_wmi_input_dev);
504 }
505 if (hp_wmi_platform_dev) {
506 platform_device_del(hp_wmi_platform_dev);
507 platform_driver_unregister(&hp_wmi_driver);
508 }
509}
510
511module_init(hp_wmi_init);
512module_exit(hp_wmi_exit);