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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / platform / x86 / asus-wmi.c
blobc5e082fb82fa1b3a56b8673f48778bdac8276cac
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 <acpi/video.h>
50
51 #include "asus-wmi.h"
52
53 MODULE_AUTHOR("Corentin Chary <corentin.chary@gmail.com>, "
54 "Yong Wang <yong.y.wang@intel.com>");
55 MODULE_DESCRIPTION("Asus Generic WMI Driver");
56 MODULE_LICENSE("GPL");
57
58 #define to_platform_driver(drv) \
59 (container_of((drv), struct platform_driver, driver))
60
61 #define to_asus_wmi_driver(pdrv) \
62 (container_of((pdrv), struct asus_wmi_driver, platform_driver))
63
64 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
65
66 #define NOTIFY_BRNUP_MIN 0x11
67 #define NOTIFY_BRNUP_MAX 0x1f
68 #define NOTIFY_BRNDOWN_MIN 0x20
69 #define NOTIFY_BRNDOWN_MAX 0x2e
70 #define NOTIFY_KBD_BRTUP 0xc4
71 #define NOTIFY_KBD_BRTDWN 0xc5
72
73 /* WMI Methods */
74 #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS SPECification */
75 #define ASUS_WMI_METHODID_SFBD 0x44424653 /* Set First Boot Device */
76 #define ASUS_WMI_METHODID_GLCD 0x44434C47 /* Get LCD status */
77 #define ASUS_WMI_METHODID_GPID 0x44495047 /* Get Panel ID?? (Resol) */
78 #define ASUS_WMI_METHODID_QMOD 0x444F4D51 /* Quiet MODe */
79 #define ASUS_WMI_METHODID_SPLV 0x4C425053 /* Set Panel Light Value */
80 #define ASUS_WMI_METHODID_SFUN 0x4E554653 /* FUNCtionalities */
81 #define ASUS_WMI_METHODID_SDSP 0x50534453 /* Set DiSPlay output */
82 #define ASUS_WMI_METHODID_GDSP 0x50534447 /* Get DiSPlay output */
83 #define ASUS_WMI_METHODID_DEVP 0x50564544 /* DEVice Policy */
84 #define ASUS_WMI_METHODID_OSVR 0x5256534F /* OS VeRsion */
85 #define ASUS_WMI_METHODID_DSTS 0x53544344 /* Device STatuS */
86 #define ASUS_WMI_METHODID_DSTS2 0x53545344 /* Device STatuS #2*/
87 #define ASUS_WMI_METHODID_BSTS 0x53545342 /* Bios STatuS ? */
88 #define ASUS_WMI_METHODID_DEVS 0x53564544 /* DEVice Set */
89 #define ASUS_WMI_METHODID_CFVS 0x53564643 /* CPU Frequency Volt Set */
90 #define ASUS_WMI_METHODID_KBFT 0x5446424B /* KeyBoard FilTer */
91 #define ASUS_WMI_METHODID_INIT 0x54494E49 /* INITialize */
92 #define ASUS_WMI_METHODID_HKEY 0x59454B48 /* Hot KEY ?? */
93
94 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE
95
96 /* Wireless */
97 #define ASUS_WMI_DEVID_HW_SWITCH 0x00010001
98 #define ASUS_WMI_DEVID_WIRELESS_LED 0x00010002
99 #define ASUS_WMI_DEVID_CWAP 0x00010003
100 #define ASUS_WMI_DEVID_WLAN 0x00010011
101 #define ASUS_WMI_DEVID_WLAN_LED 0x00010012
102 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013
103 #define ASUS_WMI_DEVID_GPS 0x00010015
104 #define ASUS_WMI_DEVID_WIMAX 0x00010017
105 #define ASUS_WMI_DEVID_WWAN3G 0x00010019
106 #define ASUS_WMI_DEVID_UWB 0x00010021
107
108 /* Leds */
109 /* 0x000200XX and 0x000400XX */
110 #define ASUS_WMI_DEVID_LED1 0x00020011
111 #define ASUS_WMI_DEVID_LED2 0x00020012
112 #define ASUS_WMI_DEVID_LED3 0x00020013
113 #define ASUS_WMI_DEVID_LED4 0x00020014
114 #define ASUS_WMI_DEVID_LED5 0x00020015
115 #define ASUS_WMI_DEVID_LED6 0x00020016
116
117 /* Backlight and Brightness */
118 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
119 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
120 #define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021
121 #define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */
122
123 /* Misc */
124 #define ASUS_WMI_DEVID_CAMERA 0x00060013
125
126 /* Storage */
127 #define ASUS_WMI_DEVID_CARDREADER 0x00080013
128
129 /* Input */
130 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
131 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
132
133 /* Fan, Thermal */
134 #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011
135 #define ASUS_WMI_DEVID_FAN_CTRL 0x00110012
136
137 /* Power */
138 #define ASUS_WMI_DEVID_PROCESSOR_STATE 0x00120012
139
140 /* Deep S3 / Resume on LID open */
141 #define ASUS_WMI_DEVID_LID_RESUME 0x00120031
142
143 /* DSTS masks */
144 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
145 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
146 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000
147 #define ASUS_WMI_DSTS_USER_BIT 0x00020000
148 #define ASUS_WMI_DSTS_BIOS_BIT 0x00040000
149 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
150 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
151
152 struct bios_args {
153 u32 arg0;
154 u32 arg1;
155 } __packed;
156
157 /*
158 * <platform>/ - debugfs root directory
159 * dev_id - current dev_id
160 * ctrl_param - current ctrl_param
161 * method_id - current method_id
162 * devs - call DEVS(dev_id, ctrl_param) and print result
163 * dsts - call DSTS(dev_id) and print result
164 * call - call method_id(dev_id, ctrl_param) and print result
165 */
166 struct asus_wmi_debug {
167 struct dentry *root;
168 u32 method_id;
169 u32 dev_id;
170 u32 ctrl_param;
171 };
172
173 struct asus_rfkill {
174 struct asus_wmi *asus;
175 struct rfkill *rfkill;
176 u32 dev_id;
177 };
178
179 struct asus_wmi {
180 int dsts_id;
181 int spec;
182 int sfun;
183
184 struct input_dev *inputdev;
185 struct backlight_device *backlight_device;
186 struct platform_device *platform_device;
187
188 struct led_classdev wlan_led;
189 int wlan_led_wk;
190 struct led_classdev tpd_led;
191 int tpd_led_wk;
192 struct led_classdev kbd_led;
193 int kbd_led_wk;
194 struct workqueue_struct *led_workqueue;
195 struct work_struct tpd_led_work;
196 struct work_struct kbd_led_work;
197 struct work_struct wlan_led_work;
198
199 struct asus_rfkill wlan;
200 struct asus_rfkill bluetooth;
201 struct asus_rfkill wimax;
202 struct asus_rfkill wwan3g;
203 struct asus_rfkill gps;
204 struct asus_rfkill uwb;
205
206 struct hotplug_slot *hotplug_slot;
207 struct mutex hotplug_lock;
208 struct mutex wmi_lock;
209 struct workqueue_struct *hotplug_workqueue;
210 struct work_struct hotplug_work;
211
212 struct asus_wmi_debug debug;
213
214 struct asus_wmi_driver *driver;
215 };
216
217 static int asus_wmi_input_init(struct asus_wmi *asus)
218 {
219 int err;
220
221 asus->inputdev = input_allocate_device();
222 if (!asus->inputdev)
223 return -ENOMEM;
224
225 asus->inputdev->name = asus->driver->input_name;
226 asus->inputdev->phys = asus->driver->input_phys;
227 asus->inputdev->id.bustype = BUS_HOST;
228 asus->inputdev->dev.parent = &asus->platform_device->dev;
229 set_bit(EV_REP, asus->inputdev->evbit);
230
231 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
232 if (err)
233 goto err_free_dev;
234
235 err = input_register_device(asus->inputdev);
236 if (err)
237 goto err_free_keymap;
238
239 return 0;
240
241 err_free_keymap:
242 sparse_keymap_free(asus->inputdev);
243 err_free_dev:
244 input_free_device(asus->inputdev);
245 return err;
246 }
247
248 static void asus_wmi_input_exit(struct asus_wmi *asus)
249 {
250 if (asus->inputdev) {
251 sparse_keymap_free(asus->inputdev);
252 input_unregister_device(asus->inputdev);
253 }
254
255 asus->inputdev = NULL;
256 }
257
258 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
259 u32 *retval)
260 {
261 struct bios_args args = {
262 .arg0 = arg0,
263 .arg1 = arg1,
264 };
265 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
266 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
267 acpi_status status;
268 union acpi_object *obj;
269 u32 tmp;
270
271 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
272 &input, &output);
273
274 if (ACPI_FAILURE(status))
275 goto exit;
276
277 obj = (union acpi_object *)output.pointer;
278 if (obj && obj->type == ACPI_TYPE_INTEGER)
279 tmp = (u32) obj->integer.value;
280 else
281 tmp = 0;
282
283 if (retval)
284 *retval = tmp;
285
286 kfree(obj);
287
288 exit:
289 if (ACPI_FAILURE(status))
290 return -EIO;
291
292 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
293 return -ENODEV;
294
295 return 0;
296 }
297
298 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
299 {
300 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
301 }
302
303 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
304 u32 *retval)
305 {
306 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
307 ctrl_param, retval);
308 }
309
310 /* Helper for special devices with magic return codes */
311 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
312 u32 dev_id, u32 mask)
313 {
314 u32 retval = 0;
315 int err;
316
317 err = asus_wmi_get_devstate(asus, dev_id, &retval);
318
319 if (err < 0)
320 return err;
321
322 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
323 return -ENODEV;
324
325 if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
326 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
327 return -ENODEV;
328 }
329
330 return retval & mask;
331 }
332
333 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
334 {
335 return asus_wmi_get_devstate_bits(asus, dev_id,
336 ASUS_WMI_DSTS_STATUS_BIT);
337 }
338
339 /*
340 * LEDs
341 */
342 /*
343 * These functions actually update the LED's, and are called from a
344 * workqueue. By doing this as separate work rather than when the LED
345 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
346 * potentially bad time, such as a timer interrupt.
347 */
348 static void tpd_led_update(struct work_struct *work)
349 {
350 int ctrl_param;
351 struct asus_wmi *asus;
352
353 asus = container_of(work, struct asus_wmi, tpd_led_work);
354
355 ctrl_param = asus->tpd_led_wk;
356 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
357 }
358
359 static void tpd_led_set(struct led_classdev *led_cdev,
360 enum led_brightness value)
361 {
362 struct asus_wmi *asus;
363
364 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
365
366 asus->tpd_led_wk = !!value;
367 queue_work(asus->led_workqueue, &asus->tpd_led_work);
368 }
369
370 static int read_tpd_led_state(struct asus_wmi *asus)
371 {
372 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
373 }
374
375 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
376 {
377 struct asus_wmi *asus;
378
379 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
380
381 return read_tpd_led_state(asus);
382 }
383
384 static void kbd_led_update(struct work_struct *work)
385 {
386 int ctrl_param = 0;
387 struct asus_wmi *asus;
388
389 asus = container_of(work, struct asus_wmi, kbd_led_work);
390
391 /*
392 * bits 0-2: level
393 * bit 7: light on/off
394 */
395 if (asus->kbd_led_wk > 0)
396 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
397
398 asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
399 }
400
401 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
402 {
403 int retval;
404
405 /*
406 * bits 0-2: level
407 * bit 7: light on/off
408 * bit 8-10: environment (0: dark, 1: normal, 2: light)
409 * bit 17: status unknown
410 */
411 retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
412 0xFFFF);
413
414 /* Unknown status is considered as off */
415 if (retval == 0x8000)
416 retval = 0;
417
418 if (retval >= 0) {
419 if (level)
420 *level = retval & 0x7F;
421 if (env)
422 *env = (retval >> 8) & 0x7F;
423 retval = 0;
424 }
425
426 return retval;
427 }
428
429 static void kbd_led_set(struct led_classdev *led_cdev,
430 enum led_brightness value)
431 {
432 struct asus_wmi *asus;
433
434 asus = container_of(led_cdev, struct asus_wmi, kbd_led);
435
436 if (value > asus->kbd_led.max_brightness)
437 value = asus->kbd_led.max_brightness;
438 else if (value < 0)
439 value = 0;
440
441 asus->kbd_led_wk = value;
442 queue_work(asus->led_workqueue, &asus->kbd_led_work);
443 }
444
445 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
446 {
447 struct asus_wmi *asus;
448 int retval, value;
449
450 asus = container_of(led_cdev, struct asus_wmi, kbd_led);
451
452 retval = kbd_led_read(asus, &value, NULL);
453
454 if (retval < 0)
455 return retval;
456
457 return value;
458 }
459
460 static int wlan_led_unknown_state(struct asus_wmi *asus)
461 {
462 u32 result;
463
464 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
465
466 return result & ASUS_WMI_DSTS_UNKNOWN_BIT;
467 }
468
469 static int wlan_led_presence(struct asus_wmi *asus)
470 {
471 u32 result;
472
473 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
474
475 return result & ASUS_WMI_DSTS_PRESENCE_BIT;
476 }
477
478 static void wlan_led_update(struct work_struct *work)
479 {
480 int ctrl_param;
481 struct asus_wmi *asus;
482
483 asus = container_of(work, struct asus_wmi, wlan_led_work);
484
485 ctrl_param = asus->wlan_led_wk;
486 asus_wmi_set_devstate(ASUS_WMI_DEVID_WIRELESS_LED, ctrl_param, NULL);
487 }
488
489 static void wlan_led_set(struct led_classdev *led_cdev,
490 enum led_brightness value)
491 {
492 struct asus_wmi *asus;
493
494 asus = container_of(led_cdev, struct asus_wmi, wlan_led);
495
496 asus->wlan_led_wk = !!value;
497 queue_work(asus->led_workqueue, &asus->wlan_led_work);
498 }
499
500 static enum led_brightness wlan_led_get(struct led_classdev *led_cdev)
501 {
502 struct asus_wmi *asus;
503 u32 result;
504
505 asus = container_of(led_cdev, struct asus_wmi, wlan_led);
506 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WIRELESS_LED, &result);
507
508 return result & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
509 }
510
511 static void asus_wmi_led_exit(struct asus_wmi *asus)
512 {
513 if (!IS_ERR_OR_NULL(asus->kbd_led.dev))
514 led_classdev_unregister(&asus->kbd_led);
515 if (!IS_ERR_OR_NULL(asus->tpd_led.dev))
516 led_classdev_unregister(&asus->tpd_led);
517 if (!IS_ERR_OR_NULL(asus->wlan_led.dev))
518 led_classdev_unregister(&asus->wlan_led);
519 if (asus->led_workqueue)
520 destroy_workqueue(asus->led_workqueue);
521 }
522
523 static int asus_wmi_led_init(struct asus_wmi *asus)
524 {
525 int rv = 0;
526
527 asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
528 if (!asus->led_workqueue)
529 return -ENOMEM;
530
531 if (read_tpd_led_state(asus) >= 0) {
532 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
533
534 asus->tpd_led.name = "asus::touchpad";
535 asus->tpd_led.brightness_set = tpd_led_set;
536 asus->tpd_led.brightness_get = tpd_led_get;
537 asus->tpd_led.max_brightness = 1;
538
539 rv = led_classdev_register(&asus->platform_device->dev,
540 &asus->tpd_led);
541 if (rv)
542 goto error;
543 }
544
545 if (kbd_led_read(asus, NULL, NULL) >= 0) {
546 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
547
548 asus->kbd_led.name = "asus::kbd_backlight";
549 asus->kbd_led.brightness_set = kbd_led_set;
550 asus->kbd_led.brightness_get = kbd_led_get;
551 asus->kbd_led.max_brightness = 3;
552
553 rv = led_classdev_register(&asus->platform_device->dev,
554 &asus->kbd_led);
555 if (rv)
556 goto error;
557 }
558
559 if (wlan_led_presence(asus) && (asus->driver->quirks->wapf == 4)) {
560 INIT_WORK(&asus->wlan_led_work, wlan_led_update);
561
562 asus->wlan_led.name = "asus::wlan";
563 asus->wlan_led.brightness_set = wlan_led_set;
564 if (!wlan_led_unknown_state(asus))
565 asus->wlan_led.brightness_get = wlan_led_get;
566 asus->wlan_led.flags = LED_CORE_SUSPENDRESUME;
567 asus->wlan_led.max_brightness = 1;
568 asus->wlan_led.default_trigger = "asus-wlan";
569
570 rv = led_classdev_register(&asus->platform_device->dev,
571 &asus->wlan_led);
572 }
573
574 error:
575 if (rv)
576 asus_wmi_led_exit(asus);
577
578 return rv;
579 }
580
581
582 /*
583 * PCI hotplug (for wlan rfkill)
584 */
585 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
586 {
587 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
588
589 if (result < 0)
590 return false;
591 return !result;
592 }
593
594 static void asus_rfkill_hotplug(struct asus_wmi *asus)
595 {
596 struct pci_dev *dev;
597 struct pci_bus *bus;
598 bool blocked;
599 bool absent;
600 u32 l;
601
602 mutex_lock(&asus->wmi_lock);
603 blocked = asus_wlan_rfkill_blocked(asus);
604 mutex_unlock(&asus->wmi_lock);
605
606 mutex_lock(&asus->hotplug_lock);
607 pci_lock_rescan_remove();
608
609 if (asus->wlan.rfkill)
610 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
611
612 if (asus->hotplug_slot) {
613 bus = pci_find_bus(0, 1);
614 if (!bus) {
615 pr_warn("Unable to find PCI bus 1?\n");
616 goto out_unlock;
617 }
618
619 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
620 pr_err("Unable to read PCI config space?\n");
621 goto out_unlock;
622 }
623 absent = (l == 0xffffffff);
624
625 if (blocked != absent) {
626 pr_warn("BIOS says wireless lan is %s, "
627 "but the pci device is %s\n",
628 blocked ? "blocked" : "unblocked",
629 absent ? "absent" : "present");
630 pr_warn("skipped wireless hotplug as probably "
631 "inappropriate for this model\n");
632 goto out_unlock;
633 }
634
635 if (!blocked) {
636 dev = pci_get_slot(bus, 0);
637 if (dev) {
638 /* Device already present */
639 pci_dev_put(dev);
640 goto out_unlock;
641 }
642 dev = pci_scan_single_device(bus, 0);
643 if (dev) {
644 pci_bus_assign_resources(bus);
645 if (pci_bus_add_device(dev))
646 pr_err("Unable to hotplug wifi\n");
647 }
648 } else {
649 dev = pci_get_slot(bus, 0);
650 if (dev) {
651 pci_stop_and_remove_bus_device(dev);
652 pci_dev_put(dev);
653 }
654 }
655 }
656
657 out_unlock:
658 pci_unlock_rescan_remove();
659 mutex_unlock(&asus->hotplug_lock);
660 }
661
662 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
663 {
664 struct asus_wmi *asus = data;
665
666 if (event != ACPI_NOTIFY_BUS_CHECK)
667 return;
668
669 /*
670 * We can't call directly asus_rfkill_hotplug because most
671 * of the time WMBC is still being executed and not reetrant.
672 * There is currently no way to tell ACPICA that we want this
673 * method to be serialized, we schedule a asus_rfkill_hotplug
674 * call later, in a safer context.
675 */
676 queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
677 }
678
679 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
680 {
681 acpi_status status;
682 acpi_handle handle;
683
684 status = acpi_get_handle(NULL, node, &handle);
685
686 if (ACPI_SUCCESS(status)) {
687 status = acpi_install_notify_handler(handle,
688 ACPI_SYSTEM_NOTIFY,
689 asus_rfkill_notify, asus);
690 if (ACPI_FAILURE(status))
691 pr_warn("Failed to register notify on %s\n", node);
692 } else
693 return -ENODEV;
694
695 return 0;
696 }
697
698 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
699 {
700 acpi_status status = AE_OK;
701 acpi_handle handle;
702
703 status = acpi_get_handle(NULL, node, &handle);
704
705 if (ACPI_SUCCESS(status)) {
706 status = acpi_remove_notify_handler(handle,
707 ACPI_SYSTEM_NOTIFY,
708 asus_rfkill_notify);
709 if (ACPI_FAILURE(status))
710 pr_err("Error removing rfkill notify handler %s\n",
711 node);
712 }
713 }
714
715 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
716 u8 *value)
717 {
718 struct asus_wmi *asus = hotplug_slot->private;
719 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
720
721 if (result < 0)
722 return result;
723
724 *value = !!result;
725 return 0;
726 }
727
728 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
729 {
730 kfree(hotplug_slot->info);
731 kfree(hotplug_slot);
732 }
733
734 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
735 .owner = THIS_MODULE,
736 .get_adapter_status = asus_get_adapter_status,
737 .get_power_status = asus_get_adapter_status,
738 };
739
740 static void asus_hotplug_work(struct work_struct *work)
741 {
742 struct asus_wmi *asus;
743
744 asus = container_of(work, struct asus_wmi, hotplug_work);
745 asus_rfkill_hotplug(asus);
746 }
747
748 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
749 {
750 int ret = -ENOMEM;
751 struct pci_bus *bus = pci_find_bus(0, 1);
752
753 if (!bus) {
754 pr_err("Unable to find wifi PCI bus\n");
755 return -ENODEV;
756 }
757
758 asus->hotplug_workqueue =
759 create_singlethread_workqueue("hotplug_workqueue");
760 if (!asus->hotplug_workqueue)
761 goto error_workqueue;
762
763 INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
764
765 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
766 if (!asus->hotplug_slot)
767 goto error_slot;
768
769 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
770 GFP_KERNEL);
771 if (!asus->hotplug_slot->info)
772 goto error_info;
773
774 asus->hotplug_slot->private = asus;
775 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
776 asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
777 asus_get_adapter_status(asus->hotplug_slot,
778 &asus->hotplug_slot->info->adapter_status);
779
780 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
781 if (ret) {
782 pr_err("Unable to register hotplug slot - %d\n", ret);
783 goto error_register;
784 }
785
786 return 0;
787
788 error_register:
789 kfree(asus->hotplug_slot->info);
790 error_info:
791 kfree(asus->hotplug_slot);
792 asus->hotplug_slot = NULL;
793 error_slot:
794 destroy_workqueue(asus->hotplug_workqueue);
795 error_workqueue:
796 return ret;
797 }
798
799 /*
800 * Rfkill devices
801 */
802 static int asus_rfkill_set(void *data, bool blocked)
803 {
804 struct asus_rfkill *priv = data;
805 u32 ctrl_param = !blocked;
806 u32 dev_id = priv->dev_id;
807
808 /*
809 * If the user bit is set, BIOS can't set and record the wlan status,
810 * it will report the value read from id ASUS_WMI_DEVID_WLAN_LED
811 * while we query the wlan status through WMI(ASUS_WMI_DEVID_WLAN).
812 * So, we have to record wlan status in id ASUS_WMI_DEVID_WLAN_LED
813 * while setting the wlan status through WMI.
814 * This is also the behavior that windows app will do.
815 */
816 if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
817 priv->asus->driver->wlan_ctrl_by_user)
818 dev_id = ASUS_WMI_DEVID_WLAN_LED;
819
820 return asus_wmi_set_devstate(dev_id, ctrl_param, NULL);
821 }
822
823 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
824 {
825 struct asus_rfkill *priv = data;
826 int result;
827
828 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
829
830 if (result < 0)
831 return;
832
833 rfkill_set_sw_state(priv->rfkill, !result);
834 }
835
836 static int asus_rfkill_wlan_set(void *data, bool blocked)
837 {
838 struct asus_rfkill *priv = data;
839 struct asus_wmi *asus = priv->asus;
840 int ret;
841
842 /*
843 * This handler is enabled only if hotplug is enabled.
844 * In this case, the asus_wmi_set_devstate() will
845 * trigger a wmi notification and we need to wait
846 * this call to finish before being able to call
847 * any wmi method
848 */
849 mutex_lock(&asus->wmi_lock);
850 ret = asus_rfkill_set(data, blocked);
851 mutex_unlock(&asus->wmi_lock);
852 return ret;
853 }
854
855 static const struct rfkill_ops asus_rfkill_wlan_ops = {
856 .set_block = asus_rfkill_wlan_set,
857 .query = asus_rfkill_query,
858 };
859
860 static const struct rfkill_ops asus_rfkill_ops = {
861 .set_block = asus_rfkill_set,
862 .query = asus_rfkill_query,
863 };
864
865 static int asus_new_rfkill(struct asus_wmi *asus,
866 struct asus_rfkill *arfkill,
867 const char *name, enum rfkill_type type, int dev_id)
868 {
869 int result = asus_wmi_get_devstate_simple(asus, dev_id);
870 struct rfkill **rfkill = &arfkill->rfkill;
871
872 if (result < 0)
873 return result;
874
875 arfkill->dev_id = dev_id;
876 arfkill->asus = asus;
877
878 if (dev_id == ASUS_WMI_DEVID_WLAN &&
879 asus->driver->quirks->hotplug_wireless)
880 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
881 &asus_rfkill_wlan_ops, arfkill);
882 else
883 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
884 &asus_rfkill_ops, arfkill);
885
886 if (!*rfkill)
887 return -EINVAL;
888
889 if ((dev_id == ASUS_WMI_DEVID_WLAN) &&
890 (asus->driver->quirks->wapf == 4))
891 rfkill_set_led_trigger_name(*rfkill, "asus-wlan");
892
893 rfkill_init_sw_state(*rfkill, !result);
894 result = rfkill_register(*rfkill);
895 if (result) {
896 rfkill_destroy(*rfkill);
897 *rfkill = NULL;
898 return result;
899 }
900 return 0;
901 }
902
903 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
904 {
905 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
906 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
907 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
908 if (asus->wlan.rfkill) {
909 rfkill_unregister(asus->wlan.rfkill);
910 rfkill_destroy(asus->wlan.rfkill);
911 asus->wlan.rfkill = NULL;
912 }
913 /*
914 * Refresh pci hotplug in case the rfkill state was changed after
915 * asus_unregister_rfkill_notifier()
916 */
917 asus_rfkill_hotplug(asus);
918 if (asus->hotplug_slot)
919 pci_hp_deregister(asus->hotplug_slot);
920 if (asus->hotplug_workqueue)
921 destroy_workqueue(asus->hotplug_workqueue);
922
923 if (asus->bluetooth.rfkill) {
924 rfkill_unregister(asus->bluetooth.rfkill);
925 rfkill_destroy(asus->bluetooth.rfkill);
926 asus->bluetooth.rfkill = NULL;
927 }
928 if (asus->wimax.rfkill) {
929 rfkill_unregister(asus->wimax.rfkill);
930 rfkill_destroy(asus->wimax.rfkill);
931 asus->wimax.rfkill = NULL;
932 }
933 if (asus->wwan3g.rfkill) {
934 rfkill_unregister(asus->wwan3g.rfkill);
935 rfkill_destroy(asus->wwan3g.rfkill);
936 asus->wwan3g.rfkill = NULL;
937 }
938 if (asus->gps.rfkill) {
939 rfkill_unregister(asus->gps.rfkill);
940 rfkill_destroy(asus->gps.rfkill);
941 asus->gps.rfkill = NULL;
942 }
943 if (asus->uwb.rfkill) {
944 rfkill_unregister(asus->uwb.rfkill);
945 rfkill_destroy(asus->uwb.rfkill);
946 asus->uwb.rfkill = NULL;
947 }
948 }
949
950 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
951 {
952 int result = 0;
953
954 mutex_init(&asus->hotplug_lock);
955 mutex_init(&asus->wmi_lock);
956
957 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
958 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
959
960 if (result && result != -ENODEV)
961 goto exit;
962
963 result = asus_new_rfkill(asus, &asus->bluetooth,
964 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
965 ASUS_WMI_DEVID_BLUETOOTH);
966
967 if (result && result != -ENODEV)
968 goto exit;
969
970 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
971 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
972
973 if (result && result != -ENODEV)
974 goto exit;
975
976 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
977 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
978
979 if (result && result != -ENODEV)
980 goto exit;
981
982 result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
983 RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
984
985 if (result && result != -ENODEV)
986 goto exit;
987
988 result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
989 RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
990
991 if (result && result != -ENODEV)
992 goto exit;
993
994 if (!asus->driver->quirks->hotplug_wireless)
995 goto exit;
996
997 result = asus_setup_pci_hotplug(asus);
998 /*
999 * If we get -EBUSY then something else is handling the PCI hotplug -
1000 * don't fail in this case
1001 */
1002 if (result == -EBUSY)
1003 result = 0;
1004
1005 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
1006 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
1007 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
1008 /*
1009 * Refresh pci hotplug in case the rfkill state was changed during
1010 * setup.
1011 */
1012 asus_rfkill_hotplug(asus);
1013
1014 exit:
1015 if (result && result != -ENODEV)
1016 asus_wmi_rfkill_exit(asus);
1017
1018 if (result == -ENODEV)
1019 result = 0;
1020
1021 return result;
1022 }
1023
1024 /*
1025 * Hwmon device
1026 */
1027 static ssize_t asus_hwmon_pwm1(struct device *dev,
1028 struct device_attribute *attr,
1029 char *buf)
1030 {
1031 struct asus_wmi *asus = dev_get_drvdata(dev);
1032 u32 value;
1033 int err;
1034
1035 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
1036
1037 if (err < 0)
1038 return err;
1039
1040 value &= 0xFF;
1041
1042 if (value == 1) /* Low Speed */
1043 value = 85;
1044 else if (value == 2)
1045 value = 170;
1046 else if (value == 3)
1047 value = 255;
1048 else if (value != 0) {
1049 pr_err("Unknown fan speed %#x\n", value);
1050 value = -1;
1051 }
1052
1053 return sprintf(buf, "%d\n", value);
1054 }
1055
1056 static ssize_t asus_hwmon_temp1(struct device *dev,
1057 struct device_attribute *attr,
1058 char *buf)
1059 {
1060 struct asus_wmi *asus = dev_get_drvdata(dev);
1061 u32 value;
1062 int err;
1063
1064 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
1065
1066 if (err < 0)
1067 return err;
1068
1069 value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
1070
1071 return sprintf(buf, "%d\n", value);
1072 }
1073
1074 static DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL);
1075 static DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL);
1076
1077 static struct attribute *hwmon_attributes[] = {
1078 &dev_attr_pwm1.attr,
1079 &dev_attr_temp1_input.attr,
1080 NULL
1081 };
1082
1083 static umode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
1084 struct attribute *attr, int idx)
1085 {
1086 struct device *dev = container_of(kobj, struct device, kobj);
1087 struct platform_device *pdev = to_platform_device(dev->parent);
1088 struct asus_wmi *asus = platform_get_drvdata(pdev);
1089 bool ok = true;
1090 int dev_id = -1;
1091 u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1092
1093 if (attr == &dev_attr_pwm1.attr)
1094 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1095 else if (attr == &dev_attr_temp1_input.attr)
1096 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1097
1098 if (dev_id != -1) {
1099 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1100
1101 if (err < 0)
1102 return 0; /* can't return negative here */
1103 }
1104
1105 if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1106 /*
1107 * We need to find a better way, probably using sfun,
1108 * bits or spec ...
1109 * Currently we disable it if:
1110 * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1111 * - reverved bits are non-zero
1112 * - sfun and presence bit are not set
1113 */
1114 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1115 || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1116 ok = false;
1117 } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1118 /* If value is zero, something is clearly wrong */
1119 if (value == 0)
1120 ok = false;
1121 }
1122
1123 return ok ? attr->mode : 0;
1124 }
1125
1126 static struct attribute_group hwmon_attribute_group = {
1127 .is_visible = asus_hwmon_sysfs_is_visible,
1128 .attrs = hwmon_attributes
1129 };
1130 __ATTRIBUTE_GROUPS(hwmon_attribute);
1131
1132 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1133 {
1134 struct device *hwmon;
1135
1136 hwmon = hwmon_device_register_with_groups(&asus->platform_device->dev,
1137 "asus", asus,
1138 hwmon_attribute_groups);
1139 if (IS_ERR(hwmon)) {
1140 pr_err("Could not register asus hwmon device\n");
1141 return PTR_ERR(hwmon);
1142 }
1143 return 0;
1144 }
1145
1146 /*
1147 * Backlight
1148 */
1149 static int read_backlight_power(struct asus_wmi *asus)
1150 {
1151 int ret;
1152 if (asus->driver->quirks->store_backlight_power)
1153 ret = !asus->driver->panel_power;
1154 else
1155 ret = asus_wmi_get_devstate_simple(asus,
1156 ASUS_WMI_DEVID_BACKLIGHT);
1157
1158 if (ret < 0)
1159 return ret;
1160
1161 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1162 }
1163
1164 static int read_brightness_max(struct asus_wmi *asus)
1165 {
1166 u32 retval;
1167 int err;
1168
1169 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1170
1171 if (err < 0)
1172 return err;
1173
1174 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1175 retval >>= 8;
1176
1177 if (!retval)
1178 return -ENODEV;
1179
1180 return retval;
1181 }
1182
1183 static int read_brightness(struct backlight_device *bd)
1184 {
1185 struct asus_wmi *asus = bl_get_data(bd);
1186 u32 retval;
1187 int err;
1188
1189 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1190
1191 if (err < 0)
1192 return err;
1193
1194 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1195 }
1196
1197 static u32 get_scalar_command(struct backlight_device *bd)
1198 {
1199 struct asus_wmi *asus = bl_get_data(bd);
1200 u32 ctrl_param = 0;
1201
1202 if ((asus->driver->brightness < bd->props.brightness) ||
1203 bd->props.brightness == bd->props.max_brightness)
1204 ctrl_param = 0x00008001;
1205 else if ((asus->driver->brightness > bd->props.brightness) ||
1206 bd->props.brightness == 0)
1207 ctrl_param = 0x00008000;
1208
1209 asus->driver->brightness = bd->props.brightness;
1210
1211 return ctrl_param;
1212 }
1213
1214 static int update_bl_status(struct backlight_device *bd)
1215 {
1216 struct asus_wmi *asus = bl_get_data(bd);
1217 u32 ctrl_param;
1218 int power, err = 0;
1219
1220 power = read_backlight_power(asus);
1221 if (power != -ENODEV && bd->props.power != power) {
1222 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1223 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1224 ctrl_param, NULL);
1225 if (asus->driver->quirks->store_backlight_power)
1226 asus->driver->panel_power = bd->props.power;
1227
1228 /* When using scalar brightness, updating the brightness
1229 * will mess with the backlight power */
1230 if (asus->driver->quirks->scalar_panel_brightness)
1231 return err;
1232 }
1233
1234 if (asus->driver->quirks->scalar_panel_brightness)
1235 ctrl_param = get_scalar_command(bd);
1236 else
1237 ctrl_param = bd->props.brightness;
1238
1239 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1240 ctrl_param, NULL);
1241
1242 return err;
1243 }
1244
1245 static const struct backlight_ops asus_wmi_bl_ops = {
1246 .get_brightness = read_brightness,
1247 .update_status = update_bl_status,
1248 };
1249
1250 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1251 {
1252 struct backlight_device *bd = asus->backlight_device;
1253 int old = bd->props.brightness;
1254 int new = old;
1255
1256 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1257 new = code - NOTIFY_BRNUP_MIN + 1;
1258 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1259 new = code - NOTIFY_BRNDOWN_MIN;
1260
1261 bd->props.brightness = new;
1262 backlight_update_status(bd);
1263 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1264
1265 return old;
1266 }
1267
1268 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1269 {
1270 struct backlight_device *bd;
1271 struct backlight_properties props;
1272 int max;
1273 int power;
1274
1275 max = read_brightness_max(asus);
1276
1277 if (max == -ENODEV)
1278 max = 0;
1279 else if (max < 0)
1280 return max;
1281
1282 power = read_backlight_power(asus);
1283
1284 if (power == -ENODEV)
1285 power = FB_BLANK_UNBLANK;
1286 else if (power < 0)
1287 return power;
1288
1289 memset(&props, 0, sizeof(struct backlight_properties));
1290 props.type = BACKLIGHT_PLATFORM;
1291 props.max_brightness = max;
1292 bd = backlight_device_register(asus->driver->name,
1293 &asus->platform_device->dev, asus,
1294 &asus_wmi_bl_ops, &props);
1295 if (IS_ERR(bd)) {
1296 pr_err("Could not register backlight device\n");
1297 return PTR_ERR(bd);
1298 }
1299
1300 asus->backlight_device = bd;
1301
1302 if (asus->driver->quirks->store_backlight_power)
1303 asus->driver->panel_power = power;
1304
1305 bd->props.brightness = read_brightness(bd);
1306 bd->props.power = power;
1307 backlight_update_status(bd);
1308
1309 asus->driver->brightness = bd->props.brightness;
1310
1311 return 0;
1312 }
1313
1314 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1315 {
1316 if (asus->backlight_device)
1317 backlight_device_unregister(asus->backlight_device);
1318
1319 asus->backlight_device = NULL;
1320 }
1321
1322 static int is_display_toggle(int code)
1323 {
1324 /* display toggle keys */
1325 if ((code >= 0x61 && code <= 0x67) ||
1326 (code >= 0x8c && code <= 0x93) ||
1327 (code >= 0xa0 && code <= 0xa7) ||
1328 (code >= 0xd0 && code <= 0xd5))
1329 return 1;
1330
1331 return 0;
1332 }
1333
1334 static void asus_wmi_notify(u32 value, void *context)
1335 {
1336 struct asus_wmi *asus = context;
1337 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1338 union acpi_object *obj;
1339 acpi_status status;
1340 int code;
1341 int orig_code;
1342 unsigned int key_value = 1;
1343 bool autorelease = 1;
1344
1345 status = wmi_get_event_data(value, &response);
1346 if (status != AE_OK) {
1347 pr_err("bad event status 0x%x\n", status);
1348 return;
1349 }
1350
1351 obj = (union acpi_object *)response.pointer;
1352
1353 if (!obj || obj->type != ACPI_TYPE_INTEGER)
1354 goto exit;
1355
1356 code = obj->integer.value;
1357 orig_code = code;
1358
1359 if (asus->driver->key_filter) {
1360 asus->driver->key_filter(asus->driver, &code, &key_value,
1361 &autorelease);
1362 if (code == ASUS_WMI_KEY_IGNORE)
1363 goto exit;
1364 }
1365
1366 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1367 code = ASUS_WMI_BRN_UP;
1368 else if (code >= NOTIFY_BRNDOWN_MIN &&
1369 code <= NOTIFY_BRNDOWN_MAX)
1370 code = ASUS_WMI_BRN_DOWN;
1371
1372 if (code == ASUS_WMI_BRN_DOWN || code == ASUS_WMI_BRN_UP) {
1373 if (!acpi_video_backlight_support()) {
1374 asus_wmi_backlight_notify(asus, orig_code);
1375 goto exit;
1376 }
1377 }
1378
1379 if (is_display_toggle(code) &&
1380 asus->driver->quirks->no_display_toggle)
1381 goto exit;
1382
1383 if (!sparse_keymap_report_event(asus->inputdev, code,
1384 key_value, autorelease))
1385 pr_info("Unknown key %x pressed\n", code);
1386
1387 exit:
1388 kfree(obj);
1389 }
1390
1391 /*
1392 * Sys helpers
1393 */
1394 static int parse_arg(const char *buf, unsigned long count, int *val)
1395 {
1396 if (!count)
1397 return 0;
1398 if (sscanf(buf, "%i", val) != 1)
1399 return -EINVAL;
1400 return count;
1401 }
1402
1403 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1404 const char *buf, size_t count)
1405 {
1406 u32 retval;
1407 int rv, err, value;
1408
1409 value = asus_wmi_get_devstate_simple(asus, devid);
1410 if (value == -ENODEV) /* Check device presence */
1411 return value;
1412
1413 rv = parse_arg(buf, count, &value);
1414 err = asus_wmi_set_devstate(devid, value, &retval);
1415
1416 if (err < 0)
1417 return err;
1418
1419 return rv;
1420 }
1421
1422 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1423 {
1424 int value = asus_wmi_get_devstate_simple(asus, devid);
1425
1426 if (value < 0)
1427 return value;
1428
1429 return sprintf(buf, "%d\n", value);
1430 }
1431
1432 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
1433 static ssize_t show_##_name(struct device *dev, \
1434 struct device_attribute *attr, \
1435 char *buf) \
1436 { \
1437 struct asus_wmi *asus = dev_get_drvdata(dev); \
1438 \
1439 return show_sys_wmi(asus, _cm, buf); \
1440 } \
1441 static ssize_t store_##_name(struct device *dev, \
1442 struct device_attribute *attr, \
1443 const char *buf, size_t count) \
1444 { \
1445 struct asus_wmi *asus = dev_get_drvdata(dev); \
1446 \
1447 return store_sys_wmi(asus, _cm, buf, count); \
1448 } \
1449 static struct device_attribute dev_attr_##_name = { \
1450 .attr = { \
1451 .name = __stringify(_name), \
1452 .mode = _mode }, \
1453 .show = show_##_name, \
1454 .store = store_##_name, \
1455 }
1456
1457 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1458 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1459 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1460 ASUS_WMI_CREATE_DEVICE_ATTR(lid_resume, 0644, ASUS_WMI_DEVID_LID_RESUME);
1461
1462 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1463 const char *buf, size_t count)
1464 {
1465 int value, rv;
1466
1467 if (!count || sscanf(buf, "%i", &value) != 1)
1468 return -EINVAL;
1469 if (value < 0 || value > 2)
1470 return -EINVAL;
1471
1472 rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1473 if (rv < 0)
1474 return rv;
1475
1476 return count;
1477 }
1478
1479 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1480
1481 static struct attribute *platform_attributes[] = {
1482 &dev_attr_cpufv.attr,
1483 &dev_attr_camera.attr,
1484 &dev_attr_cardr.attr,
1485 &dev_attr_touchpad.attr,
1486 &dev_attr_lid_resume.attr,
1487 NULL
1488 };
1489
1490 static umode_t asus_sysfs_is_visible(struct kobject *kobj,
1491 struct attribute *attr, int idx)
1492 {
1493 struct device *dev = container_of(kobj, struct device, kobj);
1494 struct platform_device *pdev = to_platform_device(dev);
1495 struct asus_wmi *asus = platform_get_drvdata(pdev);
1496 bool ok = true;
1497 int devid = -1;
1498
1499 if (attr == &dev_attr_camera.attr)
1500 devid = ASUS_WMI_DEVID_CAMERA;
1501 else if (attr == &dev_attr_cardr.attr)
1502 devid = ASUS_WMI_DEVID_CARDREADER;
1503 else if (attr == &dev_attr_touchpad.attr)
1504 devid = ASUS_WMI_DEVID_TOUCHPAD;
1505 else if (attr == &dev_attr_lid_resume.attr)
1506 devid = ASUS_WMI_DEVID_LID_RESUME;
1507
1508 if (devid != -1)
1509 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1510
1511 return ok ? attr->mode : 0;
1512 }
1513
1514 static struct attribute_group platform_attribute_group = {
1515 .is_visible = asus_sysfs_is_visible,
1516 .attrs = platform_attributes
1517 };
1518
1519 static void asus_wmi_sysfs_exit(struct platform_device *device)
1520 {
1521 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1522 }
1523
1524 static int asus_wmi_sysfs_init(struct platform_device *device)
1525 {
1526 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1527 }
1528
1529 /*
1530 * Platform device
1531 */
1532 static int asus_wmi_platform_init(struct asus_wmi *asus)
1533 {
1534 int rv;
1535
1536 /* INIT enable hotkeys on some models */
1537 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1538 pr_info("Initialization: %#x\n", rv);
1539
1540 /* We don't know yet what to do with this version... */
1541 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1542 pr_info("BIOS WMI version: %d.%d\n", rv >> 16, rv & 0xFF);
1543 asus->spec = rv;
1544 }
1545
1546 /*
1547 * The SFUN method probably allows the original driver to get the list
1548 * of features supported by a given model. For now, 0x0100 or 0x0800
1549 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1550 * The significance of others is yet to be found.
1551 */
1552 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1553 pr_info("SFUN value: %#x\n", rv);
1554 asus->sfun = rv;
1555 }
1556
1557 /*
1558 * Eee PC and Notebooks seems to have different method_id for DSTS,
1559 * but it may also be related to the BIOS's SPEC.
1560 * Note, on most Eeepc, there is no way to check if a method exist
1561 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1562 * but once again, SPEC may probably be used for that kind of things.
1563 */
1564 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1565 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1566 else
1567 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1568
1569 /* CWAP allow to define the behavior of the Fn+F2 key,
1570 * this method doesn't seems to be present on Eee PCs */
1571 if (asus->driver->quirks->wapf >= 0)
1572 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1573 asus->driver->quirks->wapf, NULL);
1574
1575 return asus_wmi_sysfs_init(asus->platform_device);
1576 }
1577
1578 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1579 {
1580 asus_wmi_sysfs_exit(asus->platform_device);
1581 }
1582
1583 /*
1584 * debugfs
1585 */
1586 struct asus_wmi_debugfs_node {
1587 struct asus_wmi *asus;
1588 char *name;
1589 int (*show) (struct seq_file *m, void *data);
1590 };
1591
1592 static int show_dsts(struct seq_file *m, void *data)
1593 {
1594 struct asus_wmi *asus = m->private;
1595 int err;
1596 u32 retval = -1;
1597
1598 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1599
1600 if (err < 0)
1601 return err;
1602
1603 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1604
1605 return 0;
1606 }
1607
1608 static int show_devs(struct seq_file *m, void *data)
1609 {
1610 struct asus_wmi *asus = m->private;
1611 int err;
1612 u32 retval = -1;
1613
1614 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1615 &retval);
1616
1617 if (err < 0)
1618 return err;
1619
1620 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1621 asus->debug.ctrl_param, retval);
1622
1623 return 0;
1624 }
1625
1626 static int show_call(struct seq_file *m, void *data)
1627 {
1628 struct asus_wmi *asus = m->private;
1629 struct bios_args args = {
1630 .arg0 = asus->debug.dev_id,
1631 .arg1 = asus->debug.ctrl_param,
1632 };
1633 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1634 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1635 union acpi_object *obj;
1636 acpi_status status;
1637
1638 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1639 1, asus->debug.method_id,
1640 &input, &output);
1641
1642 if (ACPI_FAILURE(status))
1643 return -EIO;
1644
1645 obj = (union acpi_object *)output.pointer;
1646 if (obj && obj->type == ACPI_TYPE_INTEGER)
1647 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1648 asus->debug.dev_id, asus->debug.ctrl_param,
1649 (u32) obj->integer.value);
1650 else
1651 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1652 asus->debug.dev_id, asus->debug.ctrl_param,
1653 obj ? obj->type : -1);
1654
1655 kfree(obj);
1656
1657 return 0;
1658 }
1659
1660 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1661 {NULL, "devs", show_devs},
1662 {NULL, "dsts", show_dsts},
1663 {NULL, "call", show_call},
1664 };
1665
1666 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1667 {
1668 struct asus_wmi_debugfs_node *node = inode->i_private;
1669
1670 return single_open(file, node->show, node->asus);
1671 }
1672
1673 static const struct file_operations asus_wmi_debugfs_io_ops = {
1674 .owner = THIS_MODULE,
1675 .open = asus_wmi_debugfs_open,
1676 .read = seq_read,
1677 .llseek = seq_lseek,
1678 .release = single_release,
1679 };
1680
1681 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1682 {
1683 debugfs_remove_recursive(asus->debug.root);
1684 }
1685
1686 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1687 {
1688 struct dentry *dent;
1689 int i;
1690
1691 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1692 if (!asus->debug.root) {
1693 pr_err("failed to create debugfs directory\n");
1694 goto error_debugfs;
1695 }
1696
1697 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1698 asus->debug.root, &asus->debug.method_id);
1699 if (!dent)
1700 goto error_debugfs;
1701
1702 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1703 asus->debug.root, &asus->debug.dev_id);
1704 if (!dent)
1705 goto error_debugfs;
1706
1707 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1708 asus->debug.root, &asus->debug.ctrl_param);
1709 if (!dent)
1710 goto error_debugfs;
1711
1712 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1713 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1714
1715 node->asus = asus;
1716 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1717 asus->debug.root, node,
1718 &asus_wmi_debugfs_io_ops);
1719 if (!dent) {
1720 pr_err("failed to create debug file: %s\n", node->name);
1721 goto error_debugfs;
1722 }
1723 }
1724
1725 return 0;
1726
1727 error_debugfs:
1728 asus_wmi_debugfs_exit(asus);
1729 return -ENOMEM;
1730 }
1731
1732 /*
1733 * WMI Driver
1734 */
1735 static int asus_wmi_add(struct platform_device *pdev)
1736 {
1737 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1738 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1739 struct asus_wmi *asus;
1740 acpi_status status;
1741 int err;
1742 u32 result;
1743
1744 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1745 if (!asus)
1746 return -ENOMEM;
1747
1748 asus->driver = wdrv;
1749 asus->platform_device = pdev;
1750 wdrv->platform_device = pdev;
1751 platform_set_drvdata(asus->platform_device, asus);
1752
1753 if (wdrv->detect_quirks)
1754 wdrv->detect_quirks(asus->driver);
1755
1756 err = asus_wmi_platform_init(asus);
1757 if (err)
1758 goto fail_platform;
1759
1760 err = asus_wmi_input_init(asus);
1761 if (err)
1762 goto fail_input;
1763
1764 err = asus_wmi_hwmon_init(asus);
1765 if (err)
1766 goto fail_hwmon;
1767
1768 err = asus_wmi_led_init(asus);
1769 if (err)
1770 goto fail_leds;
1771
1772 err = asus_wmi_rfkill_init(asus);
1773 if (err)
1774 goto fail_rfkill;
1775
1776 if (asus->driver->quirks->wmi_backlight_power)
1777 acpi_video_dmi_promote_vendor();
1778 if (!acpi_video_backlight_support()) {
1779 pr_info("Disabling ACPI video driver\n");
1780 acpi_video_unregister();
1781 err = asus_wmi_backlight_init(asus);
1782 if (err && err != -ENODEV)
1783 goto fail_backlight;
1784 } else
1785 pr_info("Backlight controlled by ACPI video driver\n");
1786
1787 status = wmi_install_notify_handler(asus->driver->event_guid,
1788 asus_wmi_notify, asus);
1789 if (ACPI_FAILURE(status)) {
1790 pr_err("Unable to register notify handler - %d\n", status);
1791 err = -ENODEV;
1792 goto fail_wmi_handler;
1793 }
1794
1795 err = asus_wmi_debugfs_init(asus);
1796 if (err)
1797 goto fail_debugfs;
1798
1799 asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
1800 if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
1801 asus->driver->wlan_ctrl_by_user = 1;
1802
1803 return 0;
1804
1805 fail_debugfs:
1806 wmi_remove_notify_handler(asus->driver->event_guid);
1807 fail_wmi_handler:
1808 asus_wmi_backlight_exit(asus);
1809 fail_backlight:
1810 asus_wmi_rfkill_exit(asus);
1811 fail_rfkill:
1812 asus_wmi_led_exit(asus);
1813 fail_leds:
1814 fail_hwmon:
1815 asus_wmi_input_exit(asus);
1816 fail_input:
1817 asus_wmi_platform_exit(asus);
1818 fail_platform:
1819 kfree(asus);
1820 return err;
1821 }
1822
1823 static int asus_wmi_remove(struct platform_device *device)
1824 {
1825 struct asus_wmi *asus;
1826
1827 asus = platform_get_drvdata(device);
1828 wmi_remove_notify_handler(asus->driver->event_guid);
1829 asus_wmi_backlight_exit(asus);
1830 asus_wmi_input_exit(asus);
1831 asus_wmi_led_exit(asus);
1832 asus_wmi_rfkill_exit(asus);
1833 asus_wmi_debugfs_exit(asus);
1834 asus_wmi_platform_exit(asus);
1835
1836 kfree(asus);
1837 return 0;
1838 }
1839
1840 /*
1841 * Platform driver - hibernate/resume callbacks
1842 */
1843 static int asus_hotk_thaw(struct device *device)
1844 {
1845 struct asus_wmi *asus = dev_get_drvdata(device);
1846
1847 if (asus->wlan.rfkill) {
1848 bool wlan;
1849
1850 /*
1851 * Work around bios bug - acpi _PTS turns off the wireless led
1852 * during suspend. Normally it restores it on resume, but
1853 * we should kick it ourselves in case hibernation is aborted.
1854 */
1855 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1856 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1857 }
1858
1859 return 0;
1860 }
1861
1862 static int asus_hotk_restore(struct device *device)
1863 {
1864 struct asus_wmi *asus = dev_get_drvdata(device);
1865 int bl;
1866
1867 /* Refresh both wlan rfkill state and pci hotplug */
1868 if (asus->wlan.rfkill)
1869 asus_rfkill_hotplug(asus);
1870
1871 if (asus->bluetooth.rfkill) {
1872 bl = !asus_wmi_get_devstate_simple(asus,
1873 ASUS_WMI_DEVID_BLUETOOTH);
1874 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1875 }
1876 if (asus->wimax.rfkill) {
1877 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1878 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1879 }
1880 if (asus->wwan3g.rfkill) {
1881 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1882 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1883 }
1884 if (asus->gps.rfkill) {
1885 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1886 rfkill_set_sw_state(asus->gps.rfkill, bl);
1887 }
1888 if (asus->uwb.rfkill) {
1889 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1890 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1891 }
1892
1893 return 0;
1894 }
1895
1896 static const struct dev_pm_ops asus_pm_ops = {
1897 .thaw = asus_hotk_thaw,
1898 .restore = asus_hotk_restore,
1899 };
1900
1901 static int asus_wmi_probe(struct platform_device *pdev)
1902 {
1903 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1904 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1905 int ret;
1906
1907 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1908 pr_warn("Management GUID not found\n");
1909 return -ENODEV;
1910 }
1911
1912 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1913 pr_warn("Event GUID not found\n");
1914 return -ENODEV;
1915 }
1916
1917 if (wdrv->probe) {
1918 ret = wdrv->probe(pdev);
1919 if (ret)
1920 return ret;
1921 }
1922
1923 return asus_wmi_add(pdev);
1924 }
1925
1926 static bool used;
1927
1928 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1929 {
1930 struct platform_driver *platform_driver;
1931 struct platform_device *platform_device;
1932
1933 if (used)
1934 return -EBUSY;
1935
1936 platform_driver = &driver->platform_driver;
1937 platform_driver->remove = asus_wmi_remove;
1938 platform_driver->driver.owner = driver->owner;
1939 platform_driver->driver.name = driver->name;
1940 platform_driver->driver.pm = &asus_pm_ops;
1941
1942 platform_device = platform_create_bundle(platform_driver,
1943 asus_wmi_probe,
1944 NULL, 0, NULL, 0);
1945 if (IS_ERR(platform_device))
1946 return PTR_ERR(platform_device);
1947
1948 used = true;
1949 return 0;
1950 }
1951 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1952
1953 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1954 {
1955 platform_device_unregister(driver->platform_device);
1956 platform_driver_unregister(&driver->platform_driver);
1957 used = false;
1958 }
1959 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1960
1961 static int __init asus_wmi_init(void)
1962 {
1963 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1964 pr_info("Asus Management GUID not found\n");
1965 return -ENODEV;
1966 }
1967
1968 pr_info("ASUS WMI generic driver loaded\n");
1969 return 0;
1970 }
1971
1972 static void __exit asus_wmi_exit(void)
1973 {
1974 pr_info("ASUS WMI generic driver unloaded\n");
1975 }
1976
1977 module_init(asus_wmi_init);
1978 module_exit(asus_wmi_exit);
Linux with added FPC-III support