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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
[deliverable/linux.git] / drivers / platform / x86 / asus-wmi.c
1 /*
2 * Asus PC WMI hotkey driver
3 *
4 * Copyright(C) 2010 Intel Corporation.
5 * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
6 *
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>
11 *
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.
16 *
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.
21 *
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
25 */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/slab.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/fb.h>
37 #include <linux/backlight.h>
38 #include <linux/leds.h>
39 #include <linux/rfkill.h>
40 #include <linux/pci.h>
41 #include <linux/pci_hotplug.h>
42 #include <linux/hwmon.h>
43 #include <linux/hwmon-sysfs.h>
44 #include <linux/debugfs.h>
45 #include <linux/seq_file.h>
46 #include <linux/platform_device.h>
47 #include <linux/thermal.h>
48 #include <linux/acpi.h>
49 #include <linux/dmi.h>
50 #include <acpi/video.h>
51
52 #include "asus-wmi.h"
53
54 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
55 "Yong Wang <yong.y.wang@intel.com>");
56 MODULE_DESCRIPTION("Asus Generic WMI Driver");
57 MODULE_LICENSE("GPL");
58
59 #define to_platform_driver(drv) \
60 (container_of((drv), struct platform_driver, driver))
61
62 #define to_asus_wmi_driver(pdrv) \
63 (container_of((pdrv), struct asus_wmi_driver, platform_driver))
64
65 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
66
67 #define NOTIFY_BRNUP_MIN 0x11
68 #define NOTIFY_BRNUP_MAX 0x1f
69 #define NOTIFY_BRNDOWN_MIN 0x20
70 #define NOTIFY_BRNDOWN_MAX 0x2e
71 #define NOTIFY_KBD_BRTUP 0xc4
72 #define NOTIFY_KBD_BRTDWN 0xc5
73
74 /* WMI Methods */
75 #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS SPECification */
76 #define ASUS_WMI_METHODID_SFBD 0x44424653 /* Set First Boot Device */
77 #define ASUS_WMI_METHODID_GLCD 0x44434C47 /* Get LCD status */
78 #define ASUS_WMI_METHODID_GPID 0x44495047 /* Get Panel ID?? (Resol) */
79 #define ASUS_WMI_METHODID_QMOD 0x444F4D51 /* Quiet MODe */
80 #define ASUS_WMI_METHODID_SPLV 0x4C425053 /* Set Panel Light Value */
81 #define ASUS_WMI_METHODID_SFUN 0x4E554653 /* FUNCtionalities */
82 #define ASUS_WMI_METHODID_SDSP 0x50534453 /* Set DiSPlay output */
83 #define ASUS_WMI_METHODID_GDSP 0x50534447 /* Get DiSPlay output */
84 #define ASUS_WMI_METHODID_DEVP 0x50564544 /* DEVice Policy */
85 #define ASUS_WMI_METHODID_OSVR 0x5256534F /* OS VeRsion */
86 #define ASUS_WMI_METHODID_DSTS 0x53544344 /* Device STatuS */
87 #define ASUS_WMI_METHODID_DSTS2 0x53545344 /* Device STatuS #2*/
88 #define ASUS_WMI_METHODID_BSTS 0x53545342 /* Bios STatuS ? */
89 #define ASUS_WMI_METHODID_DEVS 0x53564544 /* DEVice Set */
90 #define ASUS_WMI_METHODID_CFVS 0x53564643 /* CPU Frequency Volt Set */
91 #define ASUS_WMI_METHODID_KBFT 0x5446424B /* KeyBoard FilTer */
92 #define ASUS_WMI_METHODID_INIT 0x54494E49 /* INITialize */
93 #define ASUS_WMI_METHODID_HKEY 0x59454B48 /* Hot KEY ?? */
94
95 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE
96
97 /* Wireless */
98 #define ASUS_WMI_DEVID_HW_SWITCH 0x00010001
99 #define ASUS_WMI_DEVID_WIRELESS_LED 0x00010002
100 #define ASUS_WMI_DEVID_CWAP 0x00010003
101 #define ASUS_WMI_DEVID_WLAN 0x00010011
102 #define ASUS_WMI_DEVID_WLAN_LED 0x00010012
103 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013
104 #define ASUS_WMI_DEVID_GPS 0x00010015
105 #define ASUS_WMI_DEVID_WIMAX 0x00010017
106 #define ASUS_WMI_DEVID_WWAN3G 0x00010019
107 #define ASUS_WMI_DEVID_UWB 0x00010021
108
109 /* Leds */
110 /* 0x000200XX and 0x000400XX */
111 #define ASUS_WMI_DEVID_LED1 0x00020011
112 #define ASUS_WMI_DEVID_LED2 0x00020012
113 #define ASUS_WMI_DEVID_LED3 0x00020013
114 #define ASUS_WMI_DEVID_LED4 0x00020014
115 #define ASUS_WMI_DEVID_LED5 0x00020015
116 #define ASUS_WMI_DEVID_LED6 0x00020016
117
118 /* Backlight and Brightness */
119 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
120 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
121 #define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021
122 #define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */
123
124 /* Misc */
125 #define ASUS_WMI_DEVID_CAMERA 0x00060013
126
127 /* Storage */
128 #define ASUS_WMI_DEVID_CARDREADER 0x00080013
129
130 /* Input */
131 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
132 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
133
134 /* Fan, Thermal */
135 #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011
136 #define ASUS_WMI_DEVID_FAN_CTRL 0x00110012
137
138 /* Power */
139 #define ASUS_WMI_DEVID_PROCESSOR_STATE 0x00120012
140
141 /* Deep S3 / Resume on LID open */
142 #define ASUS_WMI_DEVID_LID_RESUME 0x00120031
143
144 /* DSTS masks */
145 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
146 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
147 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000
148 #define ASUS_WMI_DSTS_USER_BIT 0x00020000
149 #define ASUS_WMI_DSTS_BIOS_BIT 0x00040000
150 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
151 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
152
153 struct bios_args {
154 u32 arg0;
155 u32 arg1;
156 } __packed;
157
158 /*
159 * <platform>/ - debugfs root directory
160 * dev_id - current dev_id
161 * ctrl_param - current ctrl_param
162 * method_id - current method_id
163 * devs - call DEVS(dev_id, ctrl_param) and print result
164 * dsts - call DSTS(dev_id) and print result
165 * call - call method_id(dev_id, ctrl_param) and print result
166 */
167 struct asus_wmi_debug {
168 struct dentry *root;
169 u32 method_id;
170 u32 dev_id;
171 u32 ctrl_param;
172 };
173
174 struct asus_rfkill {
175 struct asus_wmi *asus;
176 struct rfkill *rfkill;
177 u32 dev_id;
178 };
179
180 struct asus_wmi {
181 int dsts_id;
182 int spec;
183 int sfun;
184
185 struct input_dev *inputdev;
186 struct backlight_device *backlight_device;
187 struct platform_device *platform_device;
188
189 struct led_classdev wlan_led;
190 int wlan_led_wk;
191 struct led_classdev tpd_led;
192 int tpd_led_wk;
193 struct led_classdev kbd_led;
194 int kbd_led_wk;
195 struct workqueue_struct *led_workqueue;
196 struct work_struct tpd_led_work;
197 struct work_struct kbd_led_work;
198 struct work_struct wlan_led_work;
199
200 struct asus_rfkill wlan;
201 struct asus_rfkill bluetooth;
202 struct asus_rfkill wimax;
203 struct asus_rfkill wwan3g;
204 struct asus_rfkill gps;
205 struct asus_rfkill uwb;
206
207 struct hotplug_slot *hotplug_slot;
208 struct mutex hotplug_lock;
209 struct mutex wmi_lock;
210 struct workqueue_struct *hotplug_workqueue;
211 struct work_struct hotplug_work;
212
213 struct asus_wmi_debug debug;
214
215 struct asus_wmi_driver *driver;
216 };
217
218 static int asus_wmi_input_init(struct asus_wmi *asus)
219 {
220 int err;
221
222 asus->inputdev = input_allocate_device();
223 if (!asus->inputdev)
224 return -ENOMEM;
225
226 asus->inputdev->name = asus->driver->input_name;
227 asus->inputdev->phys = asus->driver->input_phys;
228 asus->inputdev->id.bustype = BUS_HOST;
229 asus->inputdev->dev.parent = &asus->platform_device->dev;
230 set_bit(EV_REP, asus->inputdev->evbit);
231
232 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
233 if (err)
234 goto err_free_dev;
235
236 err = input_register_device(asus->inputdev);
237 if (err)
238 goto err_free_keymap;
239
240 return 0;
241
242 err_free_keymap:
243 sparse_keymap_free(asus->inputdev);
244 err_free_dev:
245 input_free_device(asus->inputdev);
246 return err;
247 }
248
249 static void asus_wmi_input_exit(struct asus_wmi *asus)
250 {
251 if (asus->inputdev) {
252 sparse_keymap_free(asus->inputdev);
253 input_unregister_device(asus->inputdev);
254 }
255
256 asus->inputdev = NULL;
257 }
258
259 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
260 u32 *retval)
261 {
262 struct bios_args args = {
263 .arg0 = arg0,
264 .arg1 = arg1,
265 };
266 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
267 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
268 acpi_status status;
269 union acpi_object *obj;
270 u32 tmp = 0;
271
272 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
273 &input, &output);
274
275 if (ACPI_FAILURE(status))
276 goto exit;
277
278 obj = (union acpi_object *)output.pointer;
279 if (obj && obj->type == ACPI_TYPE_INTEGER)
280 tmp = (u32) obj->integer.value;
281
282 if (retval)
283 *retval = tmp;
284
285 kfree(obj);
286
287 exit:
288 if (ACPI_FAILURE(status))
289 return -EIO;
290
291 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
292 return -ENODEV;
293
294 return 0;
295 }
296
297 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
298 {
299 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
300 }
301
302 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
303 u32 *retval)
304 {
305 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
306 ctrl_param, retval);
307 }
308
309 /* Helper for special devices with magic return codes */
310 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
311 u32 dev_id, u32 mask)
312 {
313 u32 retval = 0;
314 int err;
315
316 err = asus_wmi_get_devstate(asus, dev_id, &retval);
317
318 if (err < 0)
319 return err;
320
321 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
322 return -ENODEV;
323
324 if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
325 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
326 return -ENODEV;
327 }
328
329 return retval & mask;
330 }
331
332 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
333 {
334 return asus_wmi_get_devstate_bits(asus, dev_id,
335 ASUS_WMI_DSTS_STATUS_BIT);
336 }
337
338 /*
339 * LEDs
340 */
341 /*
342 * These functions actually update the LED's, and are called from a
343 * workqueue. By doing this as separate work rather than when the LED
344 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
345 * potentially bad time, such as a timer interrupt.
346 */
347 static void tpd_led_update(struct work_struct *work)
348 {
349 int ctrl_param;
350 struct asus_wmi *asus;
351
352 asus = container_of(work, struct asus_wmi, tpd_led_work);
353
354 ctrl_param = asus->tpd_led_wk;
355 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
356 }
357
358 static void tpd_led_set(struct led_classdev *led_cdev,
359 enum led_brightness value)
360 {
361 struct asus_wmi *asus;
362
363 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
364
365 asus->tpd_led_wk = !!value;
366 queue_work(asus->led_workqueue, &asus->tpd_led_work);
367 }
368
369 static int read_tpd_led_state(struct asus_wmi *asus)
370 {
371 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
372 }
373
374 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
375 {
376 struct asus_wmi *asus;
377
378 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
379
380 return read_tpd_led_state(asus);
381 }
382
383 static void kbd_led_update(struct work_struct *work)
384 {
385 int ctrl_param = 0;
386 struct asus_wmi *asus;
387
388 asus = container_of(work, struct asus_wmi, kbd_led_work);
389
390 /*
391 * bits 0-2: level
392 * bit 7: light on/off
393 */
394 if (asus->kbd_led_wk > 0)
395 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
396
397 asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
398 }
399
400 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
401 {
402 int retval;
403
404 /*
405 * bits 0-2: level
406 * bit 7: light on/off
407 * bit 8-10: environment (0: dark, 1: normal, 2: light)
408 * bit 17: status unknown
409 */
410 retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
411 0xFFFF);
412
413 /* Unknown status is considered as off */
414 if (retval == 0x8000)
415 retval = 0;
416
417 if (retval >= 0) {
418 if (level)
419 *level = retval & 0x7F;
420 if (env)
421 *env = (retval >> 8) & 0x7F;
422 retval = 0;
423 }
424
425 return retval;
426 }
427
428 static void kbd_led_set(struct led_classdev *led_cdev,
429 enum led_brightness value)
430 {
431 struct asus_wmi *asus;
432
433 asus = container_of(led_cdev, struct asus_wmi, kbd_led);
434
435 if (value > asus->kbd_led.max_brightness)
436 value = asus->kbd_led.max_brightness;
437 else if (value < 0)
438 value = 0;
439
440 asus->kbd_led_wk = value;
441 queue_work(asus->led_workqueue, &asus->kbd_led_work);
442 }
443
444 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
445 {
446 struct asus_wmi *asus;
447 int retval, value;
448
449 asus = container_of(led_cdev, struct asus_wmi, kbd_led);
450
451 retval = kbd_led_read(asus, &value, NULL);
452
453 if (retval < 0)
454 return retval;
455
456 return value;
457 }
458
459 static int wlan_led_unknown_state(struct asus_wmi *asus)
460 {
461 u32 result;
462
463 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
464
465 return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
466 }
467
468 static int wlan_led_presence(struct asus_wmi *asus)
469 {
470 u32 result;
471
472 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
473
474 return result & ASUS_WMI_DSTS_PRESENCE_BIT;
475 }
476
477 static void wlan_led_update(struct work_struct *work)
478 {
479 int ctrl_param;
480 struct asus_wmi *asus;
481
482 asus = container_of(work, struct asus_wmi, wlan_led_work);
483
484 ctrl_param = asus->wlan_led_wk;
485 asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
486 }
487
488 static void wlan_led_set(struct led_classdev *led_cdev,
489 enum led_brightness value)
490 {
491 struct asus_wmi *asus;
492
493 asus = container_of(led_cdev, struct asus_wmi, wlan_led);
494
495 asus->wlan_led_wk = !!value;
496 queue_work(asus->led_workqueue, &asus->wlan_led_work);
497 }
498
499 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
500 {
501 struct asus_wmi *asus;
502 u32 result;
503
504 asus = container_of(led_cdev, struct asus_wmi, wlan_led);
505 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
506
507 return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
508 }
509
510 static void asus_wmi_led_exit(struct asus_wmi *asus)
511 {
512 if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
513 led_classdev_unregister(&asus->kbd_led);
514 if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
515 led_classdev_unregister(&asus->tpd_led);
516 if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
517 led_classdev_unregister(&asus->wlan_led);
518 if (asus->led_workqueue)
519 destroy_workqueue(asus->led_workqueue);
520 }
521
522 static int asus_wmi_led_init(struct asus_wmi *asus)
523 {
524 int rv = 0;
525
526 asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
527 if (!asus->led_workqueue)
528 return -ENOMEM;
529
530 if (read_tpd_led_state(asus) >= 0) {
531 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
532
533 asus->tpd_led.name = "asus::touchpad";
534 asus->tpd_led.brightness_set = tpd_led_set;
535 asus->tpd_led.brightness_get = tpd_led_get;
536 asus->tpd_led.max_brightness = 1;
537
538 rv = led_classdev_register(&asus->platform_device->dev,
539 &asus->tpd_led);
540 if (rv)
541 goto error;
542 }
543
544 if (kbd_led_read(asus, NULL, NULL) >= 0) {
545 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
546
547 asus->kbd_led.name = "asus::kbd_backlight";
548 asus->kbd_led.brightness_set = kbd_led_set;
549 asus->kbd_led.brightness_get = kbd_led_get;
550 asus->kbd_led.max_brightness = 3;
551
552 rv = led_classdev_register(&asus->platform_device->dev,
553 &asus->kbd_led);
554 if (rv)
555 goto error;
556 }
557
558 if (wlan_led_presence(asus) && (asus->driver->quirks->wapf > 0)) {
559 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
560
561 asus->wlan_led.name = "asus::wlan";
562 asus->wlan_led.brightness_set = wlan_led_set;
563 if (!wlan_led_unknown_state(asus))
564 asus->wlan_led.brightness_get = wlan_led_get;
565 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
566 asus->wlan_led.max_brightness = 1;
567 asus->wlan_led.default_trigger = "asus-wlan";
568
569 rv = led_classdev_register(&asus->platform_device->dev,
570 &asus->wlan_led);
571 }
572
573 error:
574 if (rv)
575 asus_wmi_led_exit(asus);
576
577 return rv;
578 }
579
580
581 /*
582 * PCI hotplug (for wlan rfkill)
583 */
584 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
585 {
586 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
587
588 if (result < 0)
589 return false;
590 return !result;
591 }
592
593 static void asus_rfkill_hotplug(struct asus_wmi *asus)
594 {
595 struct pci_dev *dev;
596 struct pci_bus *bus;
597 bool blocked;
598 bool absent;
599 u32 l;
600
601 mutex_lock(&asus->wmi_lock);
602 blocked = asus_wlan_rfkill_blocked(asus);
603 mutex_unlock(&asus->wmi_lock);
604
605 mutex_lock(&asus->hotplug_lock);
606 pci_lock_rescan_remove();
607
608 if (asus->wlan.rfkill)
609 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
610
611 if (asus->hotplug_slot) {
612 bus = pci_find_bus(0, 1);
613 if (!bus) {
614 pr_warn("Unable to find PCI bus 1?\n");
615 goto out_unlock;
616 }
617
618 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
619 pr_err("Unable to read PCI config space?\n");
620 goto out_unlock;
621 }
622 absent = (l == 0xffffffff);
623
624 if (blocked != absent) {
625 pr_warn("BIOS says wireless lan is %s, "
626 "but the pci device is %s\n",
627 blocked ? "blocked" : "unblocked",
628 absent ? "absent" : "present");
629 pr_warn("skipped wireless hotplug as probably "
630 "inappropriate for this model\n");
631 goto out_unlock;
632 }
633
634 if (!blocked) {
635 dev = pci_get_slot(bus, 0);
636 if (dev) {
637 /* Device already present */
638 pci_dev_put(dev);
639 goto out_unlock;
640 }
641 dev = pci_scan_single_device(bus, 0);
642 if (dev) {
643 pci_bus_assign_resources(bus);
644 pci_bus_add_device(dev);
645 }
646 } else {
647 dev = pci_get_slot(bus, 0);
648 if (dev) {
649 pci_stop_and_remove_bus_device(dev);
650 pci_dev_put(dev);
651 }
652 }
653 }
654
655 out_unlock:
656 pci_unlock_rescan_remove();
657 mutex_unlock(&asus->hotplug_lock);
658 }
659
660 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
661 {
662 struct asus_wmi *asus = data;
663
664 if (event != ACPI_NOTIFY_BUS_CHECK)
665 return;
666
667 /*
668 * We can't call directly asus_rfkill_hotplug because most
669 * of the time WMBC is still being executed and not reetrant.
670 * There is currently no way to tell ACPICA that we want this
671 * method to be serialized, we schedule a asus_rfkill_hotplug
672 * call later, in a safer context.
673 */
674 queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
675 }
676
677 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
678 {
679 acpi_status status;
680 acpi_handle handle;
681
682 status = acpi_get_handle(NULL, node, &handle);
683
684 if (ACPI_SUCCESS(status)) {
685 status = acpi_install_notify_handler(handle,
686 ACPI_SYSTEM_NOTIFY,
687 asus_rfkill_notify, asus);
688 if (ACPI_FAILURE(status))
689 pr_warn("Failed to register notify on %s\n", node);
690 } else
691 return -ENODEV;
692
693 return 0;
694 }
695
696 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
697 {
698 acpi_status status = AE_OK;
699 acpi_handle handle;
700
701 status = acpi_get_handle(NULL, node, &handle);
702
703 if (ACPI_SUCCESS(status)) {
704 status = acpi_remove_notify_handler(handle,
705 ACPI_SYSTEM_NOTIFY,
706 asus_rfkill_notify);
707 if (ACPI_FAILURE(status))
708 pr_err("Error removing rfkill notify handler %s\n",
709 node);
710 }
711 }
712
713 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
714 u8 *value)
715 {
716 struct asus_wmi *asus = hotplug_slot->private;
717 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
718
719 if (result < 0)
720 return result;
721
722 *value = !!result;
723 return 0;
724 }
725
726 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
727 {
728 kfree(hotplug_slot->info);
729 kfree(hotplug_slot);
730 }
731
732 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
733 .owner = THIS_MODULE,
734 .get_adapter_status = asus_get_adapter_status,
735 .get_power_status = asus_get_adapter_status,
736 };
737
738 static void asus_hotplug_work(struct work_struct *work)
739 {
740 struct asus_wmi *asus;
741
742 asus = container_of(work, struct asus_wmi, hotplug_work);
743 asus_rfkill_hotplug(asus);
744 }
745
746 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
747 {
748 int ret = -ENOMEM;
749 struct pci_bus *bus = pci_find_bus(0, 1);
750
751 if (!bus) {
752 pr_err("Unable to find wifi PCI bus\n");
753 return -ENODEV;
754 }
755
756 asus->hotplug_workqueue =
757 create_singlethread_workqueue("hotplug_workqueue");
758 if (!asus->hotplug_workqueue)
759 goto error_workqueue;
760
761 INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
762
763 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
764 if (!asus->hotplug_slot)
765 goto error_slot;
766
767 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
768 GFP_KERNEL);
769 if (!asus->hotplug_slot->info)
770 goto error_info;
771
772 asus->hotplug_slot->private = asus;
773 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
774 asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
775 asus_get_adapter_status(asus->hotplug_slot,
776 &asus->hotplug_slot->info->adapter_status);
777
778 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
779 if (ret) {
780 pr_err("Unable to register hotplug slot - %d\n", ret);
781 goto error_register;
782 }
783
784 return 0;
785
786 error_register:
787 kfree(asus->hotplug_slot->info);
788 error_info:
789 kfree(asus->hotplug_slot);
790 asus->hotplug_slot = NULL;
791 error_slot:
792 destroy_workqueue(asus->hotplug_workqueue);
793 error_workqueue:
794 return ret;
795 }
796
797 /*
798 * Rfkill devices
799 */
800 static int asus_rfkill_set(void *data, bool blocked)
801 {
802 struct asus_rfkill *priv = data;
803 u32 ctrl_param = !blocked;
804 u32 dev_id = priv->dev_id;
805
806 /*
807 * If the user bit is set, BIOS can't set and record the wlan status,
808 * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
809 * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
810 * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
811 * while setting the wlan status through WMI.
812 * This is also the behavior that windows app will do.
813 */
814 if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
815 priv->asus->driver->wlan_ctrl_by_user)
816 dev_id = ASUS_WMI_DEVID_WLAN_LED;
817
818 return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
819 }
820
821 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
822 {
823 struct asus_rfkill *priv = data;
824 int result;
825
826 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
827
828 if (result < 0)
829 return;
830
831 rfkill_set_sw_state(priv->rfkill, !result);
832 }
833
834 static int asus_rfkill_wlan_set(void *data, bool blocked)
835 {
836 struct asus_rfkill *priv = data;
837 struct asus_wmi *asus = priv->asus;
838 int ret;
839
840 /*
841 * This handler is enabled only if hotplug is enabled.
842 * In this case, the asus_wmi_set_devstate() will
843 * trigger a wmi notification and we need to wait
844 * this call to finish before being able to call
845 * any wmi method
846 */
847 mutex_lock(&asus->wmi_lock);
848 ret = asus_rfkill_set(data, blocked);
849 mutex_unlock(&asus->wmi_lock);
850 return ret;
851 }
852
853 static const struct rfkill_ops asus_rfkill_wlan_ops = {
854 .set_block = asus_rfkill_wlan_set,
855 .query = asus_rfkill_query,
856 };
857
858 static const struct rfkill_ops asus_rfkill_ops = {
859 .set_block = asus_rfkill_set,
860 .query = asus_rfkill_query,
861 };
862
863 static int asus_new_rfkill(struct asus_wmi *asus,
864 struct asus_rfkill *arfkill,
865 const char *name, enum rfkill_type type, int dev_id)
866 {
867 int result = asus_wmi_get_devstate_simple(asus, dev_id);
868 struct rfkill **rfkill = &arfkill->rfkill;
869
870 if (result < 0)
871 return result;
872
873 arfkill->dev_id = dev_id;
874 arfkill->asus = asus;
875
876 if (dev_id == ASUS_WMI_DEVID_WLAN &&
877 asus->driver->quirks->hotplug_wireless)
878 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
879 &asus_rfkill_wlan_ops, arfkill);
880 else
881 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
882 &asus_rfkill_ops, arfkill);
883
884 if (!*rfkill)
885 return -EINVAL;
886
887 if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
888 (asus->driver->quirks->wapf > 0))
889 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
890
891 rfkill_init_sw_state(*rfkill, !result);
892 result = rfkill_register(*rfkill);
893 if (result) {
894 rfkill_destroy(*rfkill);
895 *rfkill = NULL;
896 return result;
897 }
898 return 0;
899 }
900
901 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
902 {
903 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
904 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
905 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
906 if (asus->wlan.rfkill) {
907 rfkill_unregister(asus->wlan.rfkill);
908 rfkill_destroy(asus->wlan.rfkill);
909 asus->wlan.rfkill = NULL;
910 }
911 /*
912 * Refresh pci hotplug in case the rfkill state was changed after
913 * asus_unregister_rfkill_notifier()
914 */
915 asus_rfkill_hotplug(asus);
916 if (asus->hotplug_slot)
917 pci_hp_deregister(asus->hotplug_slot);
918 if (asus->hotplug_workqueue)
919 destroy_workqueue(asus->hotplug_workqueue);
920
921 if (asus->bluetooth.rfkill) {
922 rfkill_unregister(asus->bluetooth.rfkill);
923 rfkill_destroy(asus->bluetooth.rfkill);
924 asus->bluetooth.rfkill = NULL;
925 }
926 if (asus->wimax.rfkill) {
927 rfkill_unregister(asus->wimax.rfkill);
928 rfkill_destroy(asus->wimax.rfkill);
929 asus->wimax.rfkill = NULL;
930 }
931 if (asus->wwan3g.rfkill) {
932 rfkill_unregister(asus->wwan3g.rfkill);
933 rfkill_destroy(asus->wwan3g.rfkill);
934 asus->wwan3g.rfkill = NULL;
935 }
936 if (asus->gps.rfkill) {
937 rfkill_unregister(asus->gps.rfkill);
938 rfkill_destroy(asus->gps.rfkill);
939 asus->gps.rfkill = NULL;
940 }
941 if (asus->uwb.rfkill) {
942 rfkill_unregister(asus->uwb.rfkill);
943 rfkill_destroy(asus->uwb.rfkill);
944 asus->uwb.rfkill = NULL;
945 }
946 }
947
948 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
949 {
950 int result = 0;
951
952 mutex_init(&asus->hotplug_lock);
953 mutex_init(&asus->wmi_lock);
954
955 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
956 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
957
958 if (result && result != -ENODEV)
959 goto exit;
960
961 result = asus_new_rfkill(asus, &asus->bluetooth,
962 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
963 ASUS_WMI_DEVID_BLUETOOTH);
964
965 if (result && result != -ENODEV)
966 goto exit;
967
968 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
969 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
970
971 if (result && result != -ENODEV)
972 goto exit;
973
974 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
975 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
976
977 if (result && result != -ENODEV)
978 goto exit;
979
980 result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
981 RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
982
983 if (result && result != -ENODEV)
984 goto exit;
985
986 result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
987 RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
988
989 if (result && result != -ENODEV)
990 goto exit;
991
992 if (!asus->driver->quirks->hotplug_wireless)
993 goto exit;
994
995 result = asus_setup_pci_hotplug(asus);
996 /*
997 * If we get -EBUSY then something else is handling the PCI hotplug -
998 * don't fail in this case
999 */
1000 if (result == -EBUSY)
1001 result = 0;
1002
1003 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1004 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1005 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1006 /*
1007 * Refresh pci hotplug in case the rfkill state was changed during
1008 * setup.
1009 */
1010 asus_rfkill_hotplug(asus);
1011
1012 exit:
1013 if (result && result != -ENODEV)
1014 asus_wmi_rfkill_exit(asus);
1015
1016 if (result == -ENODEV)
1017 result = 0;
1018
1019 return result;
1020 }
1021
1022 /*
1023 * Hwmon device
1024 */
1025 static ssize_t asus_hwmon_pwm1(struct device *dev,
1026 struct device_attribute *attr,
1027 char *buf)
1028 {
1029 struct asus_wmi *asus = dev_get_drvdata(dev);
1030 u32 value;
1031 int err;
1032
1033 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1034
1035 if (err < 0)
1036 return err;
1037
1038 value &= 0xFF;
1039
1040 if (value == 1) /* Low Speed */
1041 value = 85;
1042 else if (value == 2)
1043 value = 170;
1044 else if (value == 3)
1045 value = 255;
1046 else if (value != 0) {
1047 pr_err("Unknown fan speed %#x\n", value);
1048 value = -1;
1049 }
1050
1051 return sprintf(buf, "%d\n", value);
1052 }
1053
1054 static ssize_t asus_hwmon_temp1(struct device *dev,
1055 struct device_attribute *attr,
1056 char *buf)
1057 {
1058 struct asus_wmi *asus = dev_get_drvdata(dev);
1059 u32 value;
1060 int err;
1061
1062 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1063
1064 if (err < 0)
1065 return err;
1066
1067 value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1068
1069 return sprintf(buf, "%d\n", value);
1070 }
1071
1072 static DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL);
1073 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1074
1075 static struct attribute *hwmon_attributes[] = {
1076 &dev_attr_pwm1.attr,
1077 &dev_attr_temp1_input.attr,
1078 NULL
1079 };
1080
1081 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1082 struct attribute *attr, int idx)
1083 {
1084 struct device *dev = container_of(kobj, struct device, kobj);
1085 struct platform_device *pdev = to_platform_device(dev->parent);
1086 struct asus_wmi *asus = platform_get_drvdata(pdev);
1087 bool ok = true;
1088 int dev_id = -1;
1089 u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1090
1091 if (attr == &dev_attr_pwm1.attr)
1092 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1093 else if (attr == &dev_attr_temp1_input.attr)
1094 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1095
1096 if (dev_id != -1) {
1097 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1098
1099 if (err < 0)
1100 return 0; /* can't return negative here */
1101 }
1102
1103 if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1104 /*
1105 * We need to find a better way, probably using sfun,
1106 * bits or spec ...
1107 * Currently we disable it if:
1108 * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1109 * - reverved bits are non-zero
1110 * - sfun and presence bit are not set
1111 */
1112 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1113 || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1114 ok = false;
1115 } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1116 /* If value is zero, something is clearly wrong */
1117 if (value == 0)
1118 ok = false;
1119 }
1120
1121 return ok ? attr->mode : 0;
1122 }
1123
1124 static struct attribute_group hwmon_attribute_group = {
1125 .is_visible = asus_hwmon_sysfs_is_visible,
1126 .attrs = hwmon_attributes
1127 };
1128 __ATTRIBUTE_GROUPS(hwmon_attribute);
1129
1130 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1131 {
1132 struct device *hwmon;
1133
1134 hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1135 "asus", asus,
1136 hwmon_attribute_groups);
1137 if (IS_ERR(hwmon)) {
1138 pr_err("Could not register asus hwmon device\n");
1139 return PTR_ERR(hwmon);
1140 }
1141 return 0;
1142 }
1143
1144 /*
1145 * Backlight
1146 */
1147 static int read_backlight_power(struct asus_wmi *asus)
1148 {
1149 int ret;
1150 if (asus->driver->quirks->store_backlight_power)
1151 ret = !asus->driver->panel_power;
1152 else
1153 ret = asus_wmi_get_devstate_simple(asus,
1154 ASUS_WMI_DEVID_BACKLIGHT);
1155
1156 if (ret < 0)
1157 return ret;
1158
1159 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1160 }
1161
1162 static int read_brightness_max(struct asus_wmi *asus)
1163 {
1164 u32 retval;
1165 int err;
1166
1167 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1168
1169 if (err < 0)
1170 return err;
1171
1172 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1173 retval >>= 8;
1174
1175 if (!retval)
1176 return -ENODEV;
1177
1178 return retval;
1179 }
1180
1181 static int read_brightness(struct backlight_device *bd)
1182 {
1183 struct asus_wmi *asus = bl_get_data(bd);
1184 u32 retval;
1185 int err;
1186
1187 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1188
1189 if (err < 0)
1190 return err;
1191
1192 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1193 }
1194
1195 static u32 get_scalar_command(struct backlight_device *bd)
1196 {
1197 struct asus_wmi *asus = bl_get_data(bd);
1198 u32 ctrl_param = 0;
1199
1200 if ((asus->driver->brightness < bd->props.brightness) ||
1201 bd->props.brightness == bd->props.max_brightness)
1202 ctrl_param = 0x00008001;
1203 else if ((asus->driver->brightness > bd->props.brightness) ||
1204 bd->props.brightness == 0)
1205 ctrl_param = 0x00008000;
1206
1207 asus->driver->brightness = bd->props.brightness;
1208
1209 return ctrl_param;
1210 }
1211
1212 static int update_bl_status(struct backlight_device *bd)
1213 {
1214 struct asus_wmi *asus = bl_get_data(bd);
1215 u32 ctrl_param;
1216 int power, err = 0;
1217
1218 power = read_backlight_power(asus);
1219 if (power != -ENODEV && bd->props.power != power) {
1220 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1221 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1222 ctrl_param, NULL);
1223 if (asus->driver->quirks->store_backlight_power)
1224 asus->driver->panel_power = bd->props.power;
1225
1226 /* When using scalar brightness, updating the brightness
1227 * will mess with the backlight power */
1228 if (asus->driver->quirks->scalar_panel_brightness)
1229 return err;
1230 }
1231
1232 if (asus->driver->quirks->scalar_panel_brightness)
1233 ctrl_param = get_scalar_command(bd);
1234 else
1235 ctrl_param = bd->props.brightness;
1236
1237 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1238 ctrl_param, NULL);
1239
1240 return err;
1241 }
1242
1243 static const struct backlight_ops asus_wmi_bl_ops = {
1244 .get_brightness = read_brightness,
1245 .update_status = update_bl_status,
1246 };
1247
1248 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1249 {
1250 struct backlight_device *bd = asus->backlight_device;
1251 int old = bd->props.brightness;
1252 int new = old;
1253
1254 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1255 new = code - NOTIFY_BRNUP_MIN + 1;
1256 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1257 new = code - NOTIFY_BRNDOWN_MIN;
1258
1259 bd->props.brightness = new;
1260 backlight_update_status(bd);
1261 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1262
1263 return old;
1264 }
1265
1266 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1267 {
1268 struct backlight_device *bd;
1269 struct backlight_properties props;
1270 int max;
1271 int power;
1272
1273 max = read_brightness_max(asus);
1274 if (max < 0)
1275 return max;
1276
1277 power = read_backlight_power(asus);
1278
1279 if (power == -ENODEV)
1280 power = FB_BLANK_UNBLANK;
1281 else if (power < 0)
1282 return power;
1283
1284 memset(&props, 0, sizeof(struct backlight_properties));
1285 props.type = BACKLIGHT_PLATFORM;
1286 props.max_brightness = max;
1287 bd = backlight_device_register(asus->driver->name,
1288 &asus->platform_device->dev, asus,
1289 &asus_wmi_bl_ops, &props);
1290 if (IS_ERR(bd)) {
1291 pr_err("Could not register backlight device\n");
1292 return PTR_ERR(bd);
1293 }
1294
1295 asus->backlight_device = bd;
1296
1297 if (asus->driver->quirks->store_backlight_power)
1298 asus->driver->panel_power = power;
1299
1300 bd->props.brightness = read_brightness(bd);
1301 bd->props.power = power;
1302 backlight_update_status(bd);
1303
1304 asus->driver->brightness = bd->props.brightness;
1305
1306 return 0;
1307 }
1308
1309 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1310 {
1311 if (asus->backlight_device)
1312 backlight_device_unregister(asus->backlight_device);
1313
1314 asus->backlight_device = NULL;
1315 }
1316
1317 static int is_display_toggle(int code)
1318 {
1319 /* display toggle keys */
1320 if ((code >= 0x61 && code <= 0x67) ||
1321 (code >= 0x8c && code <= 0x93) ||
1322 (code >= 0xa0 && code <= 0xa7) ||
1323 (code >= 0xd0 && code <= 0xd5))
1324 return 1;
1325
1326 return 0;
1327 }
1328
1329 static void asus_wmi_notify(u32 value, void *context)
1330 {
1331 struct asus_wmi *asus = context;
1332 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1333 union acpi_object *obj;
1334 acpi_status status;
1335 int code;
1336 int orig_code;
1337 unsigned int key_value = 1;
1338 bool autorelease = 1;
1339
1340 status = wmi_get_event_data(value, &response);
1341 if (status != AE_OK) {
1342 pr_err("bad event status 0x%x\n", status);
1343 return;
1344 }
1345
1346 obj = (union acpi_object *)response.pointer;
1347
1348 if (!obj || obj->type != ACPI_TYPE_INTEGER)
1349 goto exit;
1350
1351 code = obj->integer.value;
1352 orig_code = code;
1353
1354 if (asus->driver->key_filter) {
1355 asus->driver->key_filter(asus->driver, &code, &key_value,
1356 &autorelease);
1357 if (code == ASUS_WMI_KEY_IGNORE)
1358 goto exit;
1359 }
1360
1361 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1362 code = ASUS_WMI_BRN_UP;
1363 else if (code >= NOTIFY_BRNDOWN_MIN &&
1364 code <= NOTIFY_BRNDOWN_MAX)
1365 code = ASUS_WMI_BRN_DOWN;
1366
1367 if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1368 if (!acpi_video_backlight_support()) {
1369 asus_wmi_backlight_notify(asus, orig_code);
1370 goto exit;
1371 }
1372 }
1373
1374 if (is_display_toggle(code) &&
1375 asus->driver->quirks->no_display_toggle)
1376 goto exit;
1377
1378 if (!sparse_keymap_report_event(asus->inputdev, code,
1379 key_value, autorelease))
1380 pr_info("Unknown key %x pressed\n", code);
1381
1382 exit:
1383 kfree(obj);
1384 }
1385
1386 /*
1387 * Sys helpers
1388 */
1389 static int parse_arg(const char *buf, unsigned long count, int *val)
1390 {
1391 if (!count)
1392 return 0;
1393 if (sscanf(buf, "%i", val) != 1)
1394 return -EINVAL;
1395 return count;
1396 }
1397
1398 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1399 const char *buf, size_t count)
1400 {
1401 u32 retval;
1402 int rv, err, value;
1403
1404 value = asus_wmi_get_devstate_simple(asus, devid);
1405 if (value == -ENODEV) /* Check device presence */
1406 return value;
1407
1408 rv = parse_arg(buf, count, &value);
1409 err = asus_wmi_set_devstate(devid, value, &retval);
1410
1411 if (err < 0)
1412 return err;
1413
1414 return rv;
1415 }
1416
1417 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1418 {
1419 int value = asus_wmi_get_devstate_simple(asus, devid);
1420
1421 if (value < 0)
1422 return value;
1423
1424 return sprintf(buf, "%d\n", value);
1425 }
1426
1427 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
1428 static ssize_t show_##_name(struct device *dev, \
1429 struct device_attribute *attr, \
1430 char *buf) \
1431 { \
1432 struct asus_wmi *asus = dev_get_drvdata(dev); \
1433 \
1434 return show_sys_wmi(asus, _cm, buf); \
1435 } \
1436 static ssize_t store_##_name(struct device *dev, \
1437 struct device_attribute *attr, \
1438 const char *buf, size_t count) \
1439 { \
1440 struct asus_wmi *asus = dev_get_drvdata(dev); \
1441 \
1442 return store_sys_wmi(asus, _cm, buf, count); \
1443 } \
1444 static struct device_attribute dev_attr_##_name = { \
1445 .attr = { \
1446 .name = __stringify(_name), \
1447 .mode = _mode }, \
1448 .show = show_##_name, \
1449 .store = store_##_name, \
1450 }
1451
1452 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1453 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1454 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1455 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1456
1457 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1458 const char *buf, size_t count)
1459 {
1460 int value, rv;
1461
1462 if (!count || sscanf(buf, "%i", &value) != 1)
1463 return -EINVAL;
1464 if (value < 0 || value > 2)
1465 return -EINVAL;
1466
1467 rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1468 if (rv < 0)
1469 return rv;
1470
1471 return count;
1472 }
1473
1474 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1475
1476 static struct attribute *platform_attributes[] = {
1477 &dev_attr_cpufv.attr,
1478 &dev_attr_camera.attr,
1479 &dev_attr_cardr.attr,
1480 &dev_attr_touchpad.attr,
1481 &dev_attr_lid_resume.attr,
1482 NULL
1483 };
1484
1485 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1486 struct attribute *attr, int idx)
1487 {
1488 struct device *dev = container_of(kobj, struct device, kobj);
1489 struct platform_device *pdev = to_platform_device(dev);
1490 struct asus_wmi *asus = platform_get_drvdata(pdev);
1491 bool ok = true;
1492 int devid = -1;
1493
1494 if (attr == &dev_attr_camera.attr)
1495 devid = ASUS_WMI_DEVID_CAMERA;
1496 else if (attr == &dev_attr_cardr.attr)
1497 devid = ASUS_WMI_DEVID_CARDREADER;
1498 else if (attr == &dev_attr_touchpad.attr)
1499 devid = ASUS_WMI_DEVID_TOUCHPAD;
1500 else if (attr == &dev_attr_lid_resume.attr)
1501 devid = ASUS_WMI_DEVID_LID_RESUME;
1502
1503 if (devid != -1)
1504 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1505
1506 return ok ? attr->mode : 0;
1507 }
1508
1509 static struct attribute_group platform_attribute_group = {
1510 .is_visible = asus_sysfs_is_visible,
1511 .attrs = platform_attributes
1512 };
1513
1514 static void asus_wmi_sysfs_exit(struct platform_device *device)
1515 {
1516 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1517 }
1518
1519 static int asus_wmi_sysfs_init(struct platform_device *device)
1520 {
1521 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1522 }
1523
1524 /*
1525 * Platform device
1526 */
1527 static int asus_wmi_platform_init(struct asus_wmi *asus)
1528 {
1529 int rv;
1530
1531 /* INIT enable hotkeys on some models */
1532 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1533 pr_info("Initialization: %#x\n", rv);
1534
1535 /* We don't know yet what to do with this version... */
1536 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1537 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1538 asus->spec = rv;
1539 }
1540
1541 /*
1542 * The SFUN method probably allows the original driver to get the list
1543 * of features supported by a given model. For now, 0x0100 or 0x0800
1544 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1545 * The significance of others is yet to be found.
1546 */
1547 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1548 pr_info("SFUN value: %#x\n", rv);
1549 asus->sfun = rv;
1550 }
1551
1552 /*
1553 * Eee PC and Notebooks seems to have different method_id for DSTS,
1554 * but it may also be related to the BIOS's SPEC.
1555 * Note, on most Eeepc, there is no way to check if a method exist
1556 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1557 * but once again, SPEC may probably be used for that kind of things.
1558 */
1559 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1560 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1561 else
1562 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1563
1564 /* CWAP allow to define the behavior of the Fn+F2 key,
1565 * this method doesn't seems to be present on Eee PCs */
1566 if (asus->driver->quirks->wapf >= 0)
1567 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1568 asus->driver->quirks->wapf, NULL);
1569
1570 return asus_wmi_sysfs_init(asus->platform_device);
1571 }
1572
1573 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1574 {
1575 asus_wmi_sysfs_exit(asus->platform_device);
1576 }
1577
1578 /*
1579 * debugfs
1580 */
1581 struct asus_wmi_debugfs_node {
1582 struct asus_wmi *asus;
1583 char *name;
1584 int (*show) (struct seq_file *m, void *data);
1585 };
1586
1587 static int show_dsts(struct seq_file *m, void *data)
1588 {
1589 struct asus_wmi *asus = m->private;
1590 int err;
1591 u32 retval = -1;
1592
1593 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1594
1595 if (err < 0)
1596 return err;
1597
1598 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1599
1600 return 0;
1601 }
1602
1603 static int show_devs(struct seq_file *m, void *data)
1604 {
1605 struct asus_wmi *asus = m->private;
1606 int err;
1607 u32 retval = -1;
1608
1609 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1610 &retval);
1611
1612 if (err < 0)
1613 return err;
1614
1615 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1616 asus->debug.ctrl_param, retval);
1617
1618 return 0;
1619 }
1620
1621 static int show_call(struct seq_file *m, void *data)
1622 {
1623 struct asus_wmi *asus = m->private;
1624 struct bios_args args = {
1625 .arg0 = asus->debug.dev_id,
1626 .arg1 = asus->debug.ctrl_param,
1627 };
1628 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1629 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1630 union acpi_object *obj;
1631 acpi_status status;
1632
1633 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1634 1, asus->debug.method_id,
1635 &input, &output);
1636
1637 if (ACPI_FAILURE(status))
1638 return -EIO;
1639
1640 obj = (union acpi_object *)output.pointer;
1641 if (obj && obj->type == ACPI_TYPE_INTEGER)
1642 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1643 asus->debug.dev_id, asus->debug.ctrl_param,
1644 (u32) obj->integer.value);
1645 else
1646 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1647 asus->debug.dev_id, asus->debug.ctrl_param,
1648 obj ? obj->type : -1);
1649
1650 kfree(obj);
1651
1652 return 0;
1653 }
1654
1655 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1656 {NULL, "devs", show_devs},
1657 {NULL, "dsts", show_dsts},
1658 {NULL, "call", show_call},
1659 };
1660
1661 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1662 {
1663 struct asus_wmi_debugfs_node *node = inode->i_private;
1664
1665 return single_open(file, node->show, node->asus);
1666 }
1667
1668 static const struct file_operations asus_wmi_debugfs_io_ops = {
1669 .owner = THIS_MODULE,
1670 .open = asus_wmi_debugfs_open,
1671 .read = seq_read,
1672 .llseek = seq_lseek,
1673 .release = single_release,
1674 };
1675
1676 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1677 {
1678 debugfs_remove_recursive(asus->debug.root);
1679 }
1680
1681 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1682 {
1683 struct dentry *dent;
1684 int i;
1685
1686 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1687 if (!asus->debug.root) {
1688 pr_err("failed to create debugfs directory\n");
1689 goto error_debugfs;
1690 }
1691
1692 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1693 asus->debug.root, &asus->debug.method_id);
1694 if (!dent)
1695 goto error_debugfs;
1696
1697 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1698 asus->debug.root, &asus->debug.dev_id);
1699 if (!dent)
1700 goto error_debugfs;
1701
1702 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1703 asus->debug.root, &asus->debug.ctrl_param);
1704 if (!dent)
1705 goto error_debugfs;
1706
1707 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1708 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1709
1710 node->asus = asus;
1711 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1712 asus->debug.root, node,
1713 &asus_wmi_debugfs_io_ops);
1714 if (!dent) {
1715 pr_err("failed to create debug file: %s\n", node->name);
1716 goto error_debugfs;
1717 }
1718 }
1719
1720 return 0;
1721
1722 error_debugfs:
1723 asus_wmi_debugfs_exit(asus);
1724 return -ENOMEM;
1725 }
1726
1727 /*
1728 * WMI Driver
1729 */
1730 static int asus_wmi_add(struct platform_device *pdev)
1731 {
1732 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1733 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1734 struct asus_wmi *asus;
1735 const char *chassis_type;
1736 acpi_status status;
1737 int err;
1738 u32 result;
1739
1740 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1741 if (!asus)
1742 return -ENOMEM;
1743
1744 asus->driver = wdrv;
1745 asus->platform_device = pdev;
1746 wdrv->platform_device = pdev;
1747 platform_set_drvdata(asus->platform_device, asus);
1748
1749 if (wdrv->detect_quirks)
1750 wdrv->detect_quirks(asus->driver);
1751
1752 err = asus_wmi_platform_init(asus);
1753 if (err)
1754 goto fail_platform;
1755
1756 err = asus_wmi_input_init(asus);
1757 if (err)
1758 goto fail_input;
1759
1760 err = asus_wmi_hwmon_init(asus);
1761 if (err)
1762 goto fail_hwmon;
1763
1764 err = asus_wmi_led_init(asus);
1765 if (err)
1766 goto fail_leds;
1767
1768 err = asus_wmi_rfkill_init(asus);
1769 if (err)
1770 goto fail_rfkill;
1771
1772 /* Some Asus desktop boards export an acpi-video backlight interface,
1773 stop this from showing up */
1774 chassis_type = dmi_get_system_info(DMI_CHASSIS_TYPE);
1775 if (chassis_type && !strcmp(chassis_type, "3"))
1776 acpi_video_dmi_promote_vendor();
1777 if (asus->driver->quirks->wmi_backlight_power)
1778 acpi_video_dmi_promote_vendor();
1779 if (!acpi_video_backlight_support()) {
1780 pr_info("Disabling ACPI video driver\n");
1781 acpi_video_unregister();
1782 err = asus_wmi_backlight_init(asus);
1783 if (err && err != -ENODEV)
1784 goto fail_backlight;
1785 } else
1786 pr_info("Backlight controlled by ACPI video driver\n");
1787
1788 status = wmi_install_notify_handler(asus->driver->event_guid,
1789 asus_wmi_notify, asus);
1790 if (ACPI_FAILURE(status)) {
1791 pr_err("Unable to register notify handler - %d\n", status);
1792 err = -ENODEV;
1793 goto fail_wmi_handler;
1794 }
1795
1796 err = asus_wmi_debugfs_init(asus);
1797 if (err)
1798 goto fail_debugfs;
1799
1800 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
1801 if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
1802 asus->driver->wlan_ctrl_by_user = 1;
1803
1804 return 0;
1805
1806 fail_debugfs:
1807 wmi_remove_notify_handler(asus->driver->event_guid);
1808 fail_wmi_handler:
1809 asus_wmi_backlight_exit(asus);
1810 fail_backlight:
1811 asus_wmi_rfkill_exit(asus);
1812 fail_rfkill:
1813 asus_wmi_led_exit(asus);
1814 fail_leds:
1815 fail_hwmon:
1816 asus_wmi_input_exit(asus);
1817 fail_input:
1818 asus_wmi_platform_exit(asus);
1819 fail_platform:
1820 kfree(asus);
1821 return err;
1822 }
1823
1824 static int asus_wmi_remove(struct platform_device *device)
1825 {
1826 struct asus_wmi *asus;
1827
1828 asus = platform_get_drvdata(device);
1829 wmi_remove_notify_handler(asus->driver->event_guid);
1830 asus_wmi_backlight_exit(asus);
1831 asus_wmi_input_exit(asus);
1832 asus_wmi_led_exit(asus);
1833 asus_wmi_rfkill_exit(asus);
1834 asus_wmi_debugfs_exit(asus);
1835 asus_wmi_platform_exit(asus);
1836
1837 kfree(asus);
1838 return 0;
1839 }
1840
1841 /*
1842 * Platform driver - hibernate/resume callbacks
1843 */
1844 static int asus_hotk_thaw(struct device *device)
1845 {
1846 struct asus_wmi *asus = dev_get_drvdata(device);
1847
1848 if (asus->wlan.rfkill) {
1849 bool wlan;
1850
1851 /*
1852 * Work around bios bug - acpi _PTS turns off the wireless led
1853 * during suspend. Normally it restores it on resume, but
1854 * we should kick it ourselves in case hibernation is aborted.
1855 */
1856 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1857 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1858 }
1859
1860 return 0;
1861 }
1862
1863 static int asus_hotk_restore(struct device *device)
1864 {
1865 struct asus_wmi *asus = dev_get_drvdata(device);
1866 int bl;
1867
1868 /* Refresh both wlan rfkill state and pci hotplug */
1869 if (asus->wlan.rfkill)
1870 asus_rfkill_hotplug(asus);
1871
1872 if (asus->bluetooth.rfkill) {
1873 bl = !asus_wmi_get_devstate_simple(asus,
1874 ASUS_WMI_DEVID_BLUETOOTH);
1875 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1876 }
1877 if (asus->wimax.rfkill) {
1878 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1879 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1880 }
1881 if (asus->wwan3g.rfkill) {
1882 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1883 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1884 }
1885 if (asus->gps.rfkill) {
1886 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1887 rfkill_set_sw_state(asus->gps.rfkill, bl);
1888 }
1889 if (asus->uwb.rfkill) {
1890 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1891 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1892 }
1893
1894 return 0;
1895 }
1896
1897 static const struct dev_pm_ops asus_pm_ops = {
1898 .thaw = asus_hotk_thaw,
1899 .restore = asus_hotk_restore,
1900 };
1901
1902 static int asus_wmi_probe(struct platform_device *pdev)
1903 {
1904 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1905 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1906 int ret;
1907
1908 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1909 pr_warn("Management GUID not found\n");
1910 return -ENODEV;
1911 }
1912
1913 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1914 pr_warn("Event GUID not found\n");
1915 return -ENODEV;
1916 }
1917
1918 if (wdrv->probe) {
1919 ret = wdrv->probe(pdev);
1920 if (ret)
1921 return ret;
1922 }
1923
1924 return asus_wmi_add(pdev);
1925 }
1926
1927 static bool used;
1928
1929 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1930 {
1931 struct platform_driver *platform_driver;
1932 struct platform_device *platform_device;
1933
1934 if (used)
1935 return -EBUSY;
1936
1937 platform_driver = &driver->platform_driver;
1938 platform_driver->remove = asus_wmi_remove;
1939 platform_driver->driver.owner = driver->owner;
1940 platform_driver->driver.name = driver->name;
1941 platform_driver->driver.pm = &asus_pm_ops;
1942
1943 platform_device = platform_create_bundle(platform_driver,
1944 asus_wmi_probe,
1945 NULL, 0, NULL, 0);
1946 if (IS_ERR(platform_device))
1947 return PTR_ERR(platform_device);
1948
1949 used = true;
1950 return 0;
1951 }
1952 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1953
1954 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1955 {
1956 platform_device_unregister(driver->platform_device);
1957 platform_driver_unregister(&driver->platform_driver);
1958 used = false;
1959 }
1960 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1961
1962 static int __init asus_wmi_init(void)
1963 {
1964 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1965 pr_info("Asus Management GUID not found\n");
1966 return -ENODEV;
1967 }
1968
1969 pr_info("ASUS WMI generic driver loaded\n");
1970 return 0;
1971 }
1972
1973 static void __exit asus_wmi_exit(void)
1974 {
1975 pr_info("ASUS WMI generic driver unloaded\n");
1976 }
1977
1978 module_init(asus_wmi_init);
1979 module_exit(asus_wmi_exit);
Linux kernel - Deliverables
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