Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
[~shefty/rdma-dev.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 <acpi/acpi_bus.h>
49 #include <acpi/acpi_drivers.h>
50
51 #include "asus-wmi.h"
52
53 MODULE_AUTHOR("Corentin Chary <corentincj@iksaif.net>, "
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_BLUETOOTH        0x00010013
102 #define ASUS_WMI_DEVID_GPS              0x00010015
103 #define ASUS_WMI_DEVID_WIMAX            0x00010017
104 #define ASUS_WMI_DEVID_WWAN3G           0x00010019
105 #define ASUS_WMI_DEVID_UWB              0x00010021
106
107 /* Leds */
108 /* 0x000200XX and 0x000400XX */
109 #define ASUS_WMI_DEVID_LED1             0x00020011
110 #define ASUS_WMI_DEVID_LED2             0x00020012
111 #define ASUS_WMI_DEVID_LED3             0x00020013
112 #define ASUS_WMI_DEVID_LED4             0x00020014
113 #define ASUS_WMI_DEVID_LED5             0x00020015
114 #define ASUS_WMI_DEVID_LED6             0x00020016
115
116 /* Backlight and Brightness */
117 #define ASUS_WMI_DEVID_BACKLIGHT        0x00050011
118 #define ASUS_WMI_DEVID_BRIGHTNESS       0x00050012
119 #define ASUS_WMI_DEVID_KBD_BACKLIGHT    0x00050021
120 #define ASUS_WMI_DEVID_LIGHT_SENSOR     0x00050022 /* ?? */
121
122 /* Misc */
123 #define ASUS_WMI_DEVID_CAMERA           0x00060013
124
125 /* Storage */
126 #define ASUS_WMI_DEVID_CARDREADER       0x00080013
127
128 /* Input */
129 #define ASUS_WMI_DEVID_TOUCHPAD         0x00100011
130 #define ASUS_WMI_DEVID_TOUCHPAD_LED     0x00100012
131
132 /* Fan, Thermal */
133 #define ASUS_WMI_DEVID_THERMAL_CTRL     0x00110011
134 #define ASUS_WMI_DEVID_FAN_CTRL         0x00110012
135
136 /* Power */
137 #define ASUS_WMI_DEVID_PROCESSOR_STATE  0x00120012
138
139 /* DSTS masks */
140 #define ASUS_WMI_DSTS_STATUS_BIT        0x00000001
141 #define ASUS_WMI_DSTS_UNKNOWN_BIT       0x00000002
142 #define ASUS_WMI_DSTS_PRESENCE_BIT      0x00010000
143 #define ASUS_WMI_DSTS_USER_BIT          0x00020000
144 #define ASUS_WMI_DSTS_BIOS_BIT          0x00040000
145 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK   0x000000FF
146 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK   0x0000FF00
147
148 struct bios_args {
149         u32 arg0;
150         u32 arg1;
151 } __packed;
152
153 /*
154  * <platform>/    - debugfs root directory
155  *   dev_id      - current dev_id
156  *   ctrl_param  - current ctrl_param
157  *   method_id   - current method_id
158  *   devs        - call DEVS(dev_id, ctrl_param) and print result
159  *   dsts        - call DSTS(dev_id)  and print result
160  *   call        - call method_id(dev_id, ctrl_param) and print result
161  */
162 struct asus_wmi_debug {
163         struct dentry *root;
164         u32 method_id;
165         u32 dev_id;
166         u32 ctrl_param;
167 };
168
169 struct asus_rfkill {
170         struct asus_wmi *asus;
171         struct rfkill *rfkill;
172         u32 dev_id;
173 };
174
175 struct asus_wmi {
176         int dsts_id;
177         int spec;
178         int sfun;
179
180         struct input_dev *inputdev;
181         struct backlight_device *backlight_device;
182         struct device *hwmon_device;
183         struct platform_device *platform_device;
184
185         struct led_classdev tpd_led;
186         int tpd_led_wk;
187         struct led_classdev kbd_led;
188         int kbd_led_wk;
189         struct workqueue_struct *led_workqueue;
190         struct work_struct tpd_led_work;
191         struct work_struct kbd_led_work;
192
193         struct asus_rfkill wlan;
194         struct asus_rfkill bluetooth;
195         struct asus_rfkill wimax;
196         struct asus_rfkill wwan3g;
197         struct asus_rfkill gps;
198         struct asus_rfkill uwb;
199
200         struct hotplug_slot *hotplug_slot;
201         struct mutex hotplug_lock;
202         struct mutex wmi_lock;
203         struct workqueue_struct *hotplug_workqueue;
204         struct work_struct hotplug_work;
205
206         struct asus_wmi_debug debug;
207
208         struct asus_wmi_driver *driver;
209 };
210
211 static int asus_wmi_input_init(struct asus_wmi *asus)
212 {
213         int err;
214
215         asus->inputdev = input_allocate_device();
216         if (!asus->inputdev)
217                 return -ENOMEM;
218
219         asus->inputdev->name = asus->driver->input_name;
220         asus->inputdev->phys = asus->driver->input_phys;
221         asus->inputdev->id.bustype = BUS_HOST;
222         asus->inputdev->dev.parent = &asus->platform_device->dev;
223         set_bit(EV_REP, asus->inputdev->evbit);
224
225         err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
226         if (err)
227                 goto err_free_dev;
228
229         err = input_register_device(asus->inputdev);
230         if (err)
231                 goto err_free_keymap;
232
233         return 0;
234
235 err_free_keymap:
236         sparse_keymap_free(asus->inputdev);
237 err_free_dev:
238         input_free_device(asus->inputdev);
239         return err;
240 }
241
242 static void asus_wmi_input_exit(struct asus_wmi *asus)
243 {
244         if (asus->inputdev) {
245                 sparse_keymap_free(asus->inputdev);
246                 input_unregister_device(asus->inputdev);
247         }
248
249         asus->inputdev = NULL;
250 }
251
252 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
253                                     u32 *retval)
254 {
255         struct bios_args args = {
256                 .arg0 = arg0,
257                 .arg1 = arg1,
258         };
259         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
260         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
261         acpi_status status;
262         union acpi_object *obj;
263         u32 tmp;
264
265         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
266                                      &input, &output);
267
268         if (ACPI_FAILURE(status))
269                 goto exit;
270
271         obj = (union acpi_object *)output.pointer;
272         if (obj && obj->type == ACPI_TYPE_INTEGER)
273                 tmp = (u32) obj->integer.value;
274         else
275                 tmp = 0;
276
277         if (retval)
278                 *retval = tmp;
279
280         kfree(obj);
281
282 exit:
283         if (ACPI_FAILURE(status))
284                 return -EIO;
285
286         if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
287                 return -ENODEV;
288
289         return 0;
290 }
291
292 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
293 {
294         return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
295 }
296
297 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
298                                  u32 *retval)
299 {
300         return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
301                                         ctrl_param, retval);
302 }
303
304 /* Helper for special devices with magic return codes */
305 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
306                                       u32 dev_id, u32 mask)
307 {
308         u32 retval = 0;
309         int err;
310
311         err = asus_wmi_get_devstate(asus, dev_id, &retval);
312
313         if (err < 0)
314                 return err;
315
316         if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
317                 return -ENODEV;
318
319         if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
320                 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
321                         return -ENODEV;
322         }
323
324         return retval & mask;
325 }
326
327 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
328 {
329         return asus_wmi_get_devstate_bits(asus, dev_id,
330                                           ASUS_WMI_DSTS_STATUS_BIT);
331 }
332
333 /*
334  * LEDs
335  */
336 /*
337  * These functions actually update the LED's, and are called from a
338  * workqueue. By doing this as separate work rather than when the LED
339  * subsystem asks, we avoid messing with the Asus ACPI stuff during a
340  * potentially bad time, such as a timer interrupt.
341  */
342 static void tpd_led_update(struct work_struct *work)
343 {
344         int ctrl_param;
345         struct asus_wmi *asus;
346
347         asus = container_of(work, struct asus_wmi, tpd_led_work);
348
349         ctrl_param = asus->tpd_led_wk;
350         asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
351 }
352
353 static void tpd_led_set(struct led_classdev *led_cdev,
354                         enum led_brightness value)
355 {
356         struct asus_wmi *asus;
357
358         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
359
360         asus->tpd_led_wk = !!value;
361         queue_work(asus->led_workqueue, &asus->tpd_led_work);
362 }
363
364 static int read_tpd_led_state(struct asus_wmi *asus)
365 {
366         return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
367 }
368
369 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
370 {
371         struct asus_wmi *asus;
372
373         asus = container_of(led_cdev, struct asus_wmi, tpd_led);
374
375         return read_tpd_led_state(asus);
376 }
377
378 static void kbd_led_update(struct work_struct *work)
379 {
380         int ctrl_param = 0;
381         struct asus_wmi *asus;
382
383         asus = container_of(work, struct asus_wmi, kbd_led_work);
384
385         /*
386          * bits 0-2: level
387          * bit 7: light on/off
388          */
389         if (asus->kbd_led_wk > 0)
390                 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
391
392         asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
393 }
394
395 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
396 {
397         int retval;
398
399         /*
400          * bits 0-2: level
401          * bit 7: light on/off
402          * bit 8-10: environment (0: dark, 1: normal, 2: light)
403          * bit 17: status unknown
404          */
405         retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
406                                             0xFFFF);
407
408         /* Unknown status is considered as off */
409         if (retval == 0x8000)
410                 retval = 0;
411
412         if (retval >= 0) {
413                 if (level)
414                         *level = retval & 0x80 ? retval & 0x7F : 0;
415                 if (env)
416                         *env = (retval >> 8) & 0x7F;
417                 retval = 0;
418         }
419
420         return retval;
421 }
422
423 static void kbd_led_set(struct led_classdev *led_cdev,
424                         enum led_brightness value)
425 {
426         struct asus_wmi *asus;
427
428         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
429
430         if (value > asus->kbd_led.max_brightness)
431                 value = asus->kbd_led.max_brightness;
432         else if (value < 0)
433                 value = 0;
434
435         asus->kbd_led_wk = value;
436         queue_work(asus->led_workqueue, &asus->kbd_led_work);
437 }
438
439 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
440 {
441         struct asus_wmi *asus;
442         int retval, value;
443
444         asus = container_of(led_cdev, struct asus_wmi, kbd_led);
445
446         retval = kbd_led_read(asus, &value, NULL);
447
448         if (retval < 0)
449                 return retval;
450
451         return value;
452 }
453
454 static void asus_wmi_led_exit(struct asus_wmi *asus)
455 {
456         if (asus->tpd_led.dev)
457                 led_classdev_unregister(&asus->tpd_led);
458         if (asus->led_workqueue)
459                 destroy_workqueue(asus->led_workqueue);
460 }
461
462 static int asus_wmi_led_init(struct asus_wmi *asus)
463 {
464         int rv = 0;
465
466         asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
467         if (!asus->led_workqueue)
468                 return -ENOMEM;
469
470         if (read_tpd_led_state(asus) >= 0) {
471                 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
472
473                 asus->tpd_led.name = "asus::touchpad";
474                 asus->tpd_led.brightness_set = tpd_led_set;
475                 asus->tpd_led.brightness_get = tpd_led_get;
476                 asus->tpd_led.max_brightness = 1;
477
478                 rv = led_classdev_register(&asus->platform_device->dev,
479                                            &asus->tpd_led);
480                 if (rv)
481                         goto error;
482         }
483
484         if (kbd_led_read(asus, NULL, NULL) >= 0) {
485                 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
486
487                 asus->kbd_led.name = "asus::kbd_backlight";
488                 asus->kbd_led.brightness_set = kbd_led_set;
489                 asus->kbd_led.brightness_get = kbd_led_get;
490                 asus->kbd_led.max_brightness = 3;
491
492                 rv = led_classdev_register(&asus->platform_device->dev,
493                                            &asus->kbd_led);
494         }
495
496 error:
497         if (rv)
498                 asus_wmi_led_exit(asus);
499
500         return rv;
501 }
502
503
504 /*
505  * PCI hotplug (for wlan rfkill)
506  */
507 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
508 {
509         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
510
511         if (result < 0)
512                 return false;
513         return !result;
514 }
515
516 static void asus_rfkill_hotplug(struct asus_wmi *asus)
517 {
518         struct pci_dev *dev;
519         struct pci_bus *bus;
520         bool blocked;
521         bool absent;
522         u32 l;
523
524         mutex_lock(&asus->wmi_lock);
525         blocked = asus_wlan_rfkill_blocked(asus);
526         mutex_unlock(&asus->wmi_lock);
527
528         mutex_lock(&asus->hotplug_lock);
529
530         if (asus->wlan.rfkill)
531                 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
532
533         if (asus->hotplug_slot) {
534                 bus = pci_find_bus(0, 1);
535                 if (!bus) {
536                         pr_warn("Unable to find PCI bus 1?\n");
537                         goto out_unlock;
538                 }
539
540                 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
541                         pr_err("Unable to read PCI config space?\n");
542                         goto out_unlock;
543                 }
544                 absent = (l == 0xffffffff);
545
546                 if (blocked != absent) {
547                         pr_warn("BIOS says wireless lan is %s, "
548                                 "but the pci device is %s\n",
549                                 blocked ? "blocked" : "unblocked",
550                                 absent ? "absent" : "present");
551                         pr_warn("skipped wireless hotplug as probably "
552                                 "inappropriate for this model\n");
553                         goto out_unlock;
554                 }
555
556                 if (!blocked) {
557                         dev = pci_get_slot(bus, 0);
558                         if (dev) {
559                                 /* Device already present */
560                                 pci_dev_put(dev);
561                                 goto out_unlock;
562                         }
563                         dev = pci_scan_single_device(bus, 0);
564                         if (dev) {
565                                 pci_bus_assign_resources(bus);
566                                 if (pci_bus_add_device(dev))
567                                         pr_err("Unable to hotplug wifi\n");
568                         }
569                 } else {
570                         dev = pci_get_slot(bus, 0);
571                         if (dev) {
572                                 pci_remove_bus_device(dev);
573                                 pci_dev_put(dev);
574                         }
575                 }
576         }
577
578 out_unlock:
579         mutex_unlock(&asus->hotplug_lock);
580 }
581
582 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
583 {
584         struct asus_wmi *asus = data;
585
586         if (event != ACPI_NOTIFY_BUS_CHECK)
587                 return;
588
589         /*
590          * We can't call directly asus_rfkill_hotplug because most
591          * of the time WMBC is still being executed and not reetrant.
592          * There is currently no way to tell ACPICA that  we want this
593          * method to be serialized, we schedule a asus_rfkill_hotplug
594          * call later, in a safer context.
595          */
596         queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
597 }
598
599 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
600 {
601         acpi_status status;
602         acpi_handle handle;
603
604         status = acpi_get_handle(NULL, node, &handle);
605
606         if (ACPI_SUCCESS(status)) {
607                 status = acpi_install_notify_handler(handle,
608                                                      ACPI_SYSTEM_NOTIFY,
609                                                      asus_rfkill_notify, asus);
610                 if (ACPI_FAILURE(status))
611                         pr_warn("Failed to register notify on %s\n", node);
612         } else
613                 return -ENODEV;
614
615         return 0;
616 }
617
618 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
619 {
620         acpi_status status = AE_OK;
621         acpi_handle handle;
622
623         status = acpi_get_handle(NULL, node, &handle);
624
625         if (ACPI_SUCCESS(status)) {
626                 status = acpi_remove_notify_handler(handle,
627                                                     ACPI_SYSTEM_NOTIFY,
628                                                     asus_rfkill_notify);
629                 if (ACPI_FAILURE(status))
630                         pr_err("Error removing rfkill notify handler %s\n",
631                                node);
632         }
633 }
634
635 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
636                                    u8 *value)
637 {
638         struct asus_wmi *asus = hotplug_slot->private;
639         int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
640
641         if (result < 0)
642                 return result;
643
644         *value = !!result;
645         return 0;
646 }
647
648 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
649 {
650         kfree(hotplug_slot->info);
651         kfree(hotplug_slot);
652 }
653
654 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
655         .owner = THIS_MODULE,
656         .get_adapter_status = asus_get_adapter_status,
657         .get_power_status = asus_get_adapter_status,
658 };
659
660 static void asus_hotplug_work(struct work_struct *work)
661 {
662         struct asus_wmi *asus;
663
664         asus = container_of(work, struct asus_wmi, hotplug_work);
665         asus_rfkill_hotplug(asus);
666 }
667
668 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
669 {
670         int ret = -ENOMEM;
671         struct pci_bus *bus = pci_find_bus(0, 1);
672
673         if (!bus) {
674                 pr_err("Unable to find wifi PCI bus\n");
675                 return -ENODEV;
676         }
677
678         asus->hotplug_workqueue =
679             create_singlethread_workqueue("hotplug_workqueue");
680         if (!asus->hotplug_workqueue)
681                 goto error_workqueue;
682
683         INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
684
685         asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
686         if (!asus->hotplug_slot)
687                 goto error_slot;
688
689         asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
690                                            GFP_KERNEL);
691         if (!asus->hotplug_slot->info)
692                 goto error_info;
693
694         asus->hotplug_slot->private = asus;
695         asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
696         asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
697         asus_get_adapter_status(asus->hotplug_slot,
698                                 &asus->hotplug_slot->info->adapter_status);
699
700         ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
701         if (ret) {
702                 pr_err("Unable to register hotplug slot - %d\n", ret);
703                 goto error_register;
704         }
705
706         return 0;
707
708 error_register:
709         kfree(asus->hotplug_slot->info);
710 error_info:
711         kfree(asus->hotplug_slot);
712         asus->hotplug_slot = NULL;
713 error_slot:
714         destroy_workqueue(asus->hotplug_workqueue);
715 error_workqueue:
716         return ret;
717 }
718
719 /*
720  * Rfkill devices
721  */
722 static int asus_rfkill_set(void *data, bool blocked)
723 {
724         struct asus_rfkill *priv = data;
725         u32 ctrl_param = !blocked;
726
727         return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL);
728 }
729
730 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
731 {
732         struct asus_rfkill *priv = data;
733         int result;
734
735         result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
736
737         if (result < 0)
738                 return;
739
740         rfkill_set_sw_state(priv->rfkill, !result);
741 }
742
743 static int asus_rfkill_wlan_set(void *data, bool blocked)
744 {
745         struct asus_rfkill *priv = data;
746         struct asus_wmi *asus = priv->asus;
747         int ret;
748
749         /*
750          * This handler is enabled only if hotplug is enabled.
751          * In this case, the asus_wmi_set_devstate() will
752          * trigger a wmi notification and we need to wait
753          * this call to finish before being able to call
754          * any wmi method
755          */
756         mutex_lock(&asus->wmi_lock);
757         ret = asus_rfkill_set(data, blocked);
758         mutex_unlock(&asus->wmi_lock);
759         return ret;
760 }
761
762 static const struct rfkill_ops asus_rfkill_wlan_ops = {
763         .set_block = asus_rfkill_wlan_set,
764         .query = asus_rfkill_query,
765 };
766
767 static const struct rfkill_ops asus_rfkill_ops = {
768         .set_block = asus_rfkill_set,
769         .query = asus_rfkill_query,
770 };
771
772 static int asus_new_rfkill(struct asus_wmi *asus,
773                            struct asus_rfkill *arfkill,
774                            const char *name, enum rfkill_type type, int dev_id)
775 {
776         int result = asus_wmi_get_devstate_simple(asus, dev_id);
777         struct rfkill **rfkill = &arfkill->rfkill;
778
779         if (result < 0)
780                 return result;
781
782         arfkill->dev_id = dev_id;
783         arfkill->asus = asus;
784
785         if (dev_id == ASUS_WMI_DEVID_WLAN && asus->driver->hotplug_wireless)
786                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
787                                        &asus_rfkill_wlan_ops, arfkill);
788         else
789                 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
790                                        &asus_rfkill_ops, arfkill);
791
792         if (!*rfkill)
793                 return -EINVAL;
794
795         rfkill_init_sw_state(*rfkill, !result);
796         result = rfkill_register(*rfkill);
797         if (result) {
798                 rfkill_destroy(*rfkill);
799                 *rfkill = NULL;
800                 return result;
801         }
802         return 0;
803 }
804
805 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
806 {
807         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
808         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
809         asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
810         if (asus->wlan.rfkill) {
811                 rfkill_unregister(asus->wlan.rfkill);
812                 rfkill_destroy(asus->wlan.rfkill);
813                 asus->wlan.rfkill = NULL;
814         }
815         /*
816          * Refresh pci hotplug in case the rfkill state was changed after
817          * asus_unregister_rfkill_notifier()
818          */
819         asus_rfkill_hotplug(asus);
820         if (asus->hotplug_slot)
821                 pci_hp_deregister(asus->hotplug_slot);
822         if (asus->hotplug_workqueue)
823                 destroy_workqueue(asus->hotplug_workqueue);
824
825         if (asus->bluetooth.rfkill) {
826                 rfkill_unregister(asus->bluetooth.rfkill);
827                 rfkill_destroy(asus->bluetooth.rfkill);
828                 asus->bluetooth.rfkill = NULL;
829         }
830         if (asus->wimax.rfkill) {
831                 rfkill_unregister(asus->wimax.rfkill);
832                 rfkill_destroy(asus->wimax.rfkill);
833                 asus->wimax.rfkill = NULL;
834         }
835         if (asus->wwan3g.rfkill) {
836                 rfkill_unregister(asus->wwan3g.rfkill);
837                 rfkill_destroy(asus->wwan3g.rfkill);
838                 asus->wwan3g.rfkill = NULL;
839         }
840         if (asus->gps.rfkill) {
841                 rfkill_unregister(asus->gps.rfkill);
842                 rfkill_destroy(asus->gps.rfkill);
843                 asus->gps.rfkill = NULL;
844         }
845         if (asus->uwb.rfkill) {
846                 rfkill_unregister(asus->uwb.rfkill);
847                 rfkill_destroy(asus->uwb.rfkill);
848                 asus->uwb.rfkill = NULL;
849         }
850 }
851
852 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
853 {
854         int result = 0;
855
856         mutex_init(&asus->hotplug_lock);
857         mutex_init(&asus->wmi_lock);
858
859         result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
860                                  RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
861
862         if (result && result != -ENODEV)
863                 goto exit;
864
865         result = asus_new_rfkill(asus, &asus->bluetooth,
866                                  "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
867                                  ASUS_WMI_DEVID_BLUETOOTH);
868
869         if (result && result != -ENODEV)
870                 goto exit;
871
872         result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
873                                  RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
874
875         if (result && result != -ENODEV)
876                 goto exit;
877
878         result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
879                                  RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
880
881         if (result && result != -ENODEV)
882                 goto exit;
883
884         result = asus_new_rfkill(asus, &asus->gps, "asus-gps",
885                                  RFKILL_TYPE_GPS, ASUS_WMI_DEVID_GPS);
886
887         if (result && result != -ENODEV)
888                 goto exit;
889
890         result = asus_new_rfkill(asus, &asus->uwb, "asus-uwb",
891                                  RFKILL_TYPE_UWB, ASUS_WMI_DEVID_UWB);
892
893         if (result && result != -ENODEV)
894                 goto exit;
895
896         if (!asus->driver->hotplug_wireless)
897                 goto exit;
898
899         result = asus_setup_pci_hotplug(asus);
900         /*
901          * If we get -EBUSY then something else is handling the PCI hotplug -
902          * don't fail in this case
903          */
904         if (result == -EBUSY)
905                 result = 0;
906
907         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
908         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
909         asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
910         /*
911          * Refresh pci hotplug in case the rfkill state was changed during
912          * setup.
913          */
914         asus_rfkill_hotplug(asus);
915
916 exit:
917         if (result && result != -ENODEV)
918                 asus_wmi_rfkill_exit(asus);
919
920         if (result == -ENODEV)
921                 result = 0;
922
923         return result;
924 }
925
926 /*
927  * Hwmon device
928  */
929 static ssize_t asus_hwmon_pwm1(struct device *dev,
930                                struct device_attribute *attr,
931                                char *buf)
932 {
933         struct asus_wmi *asus = dev_get_drvdata(dev);
934         u32 value;
935         int err;
936
937         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
938
939         if (err < 0)
940                 return err;
941
942         value &= 0xFF;
943
944         if (value == 1) /* Low Speed */
945                 value = 85;
946         else if (value == 2)
947                 value = 170;
948         else if (value == 3)
949                 value = 255;
950         else if (value != 0) {
951                 pr_err("Unknown fan speed %#x", value);
952                 value = -1;
953         }
954
955         return sprintf(buf, "%d\n", value);
956 }
957
958 static ssize_t asus_hwmon_temp1(struct device *dev,
959                                 struct device_attribute *attr,
960                                 char *buf)
961 {
962         struct asus_wmi *asus = dev_get_drvdata(dev);
963         u32 value;
964         int err;
965
966         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_THERMAL_CTRL, &value);
967
968         if (err < 0)
969                 return err;
970
971         value = KELVIN_TO_CELSIUS((value & 0xFFFF)) * 1000;
972
973         return sprintf(buf, "%d\n", value);
974 }
975
976 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
977 static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, asus_hwmon_temp1, NULL, 0);
978
979 static ssize_t
980 show_name(struct device *dev, struct device_attribute *attr, char *buf)
981 {
982         return sprintf(buf, "asus\n");
983 }
984 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
985
986 static struct attribute *hwmon_attributes[] = {
987         &sensor_dev_attr_pwm1.dev_attr.attr,
988         &sensor_dev_attr_temp1_input.dev_attr.attr,
989         &sensor_dev_attr_name.dev_attr.attr,
990         NULL
991 };
992
993 static mode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
994                                           struct attribute *attr, int idx)
995 {
996         struct device *dev = container_of(kobj, struct device, kobj);
997         struct platform_device *pdev = to_platform_device(dev->parent);
998         struct asus_wmi *asus = platform_get_drvdata(pdev);
999         bool ok = true;
1000         int dev_id = -1;
1001         u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
1002
1003         if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
1004                 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
1005         else if (attr == &sensor_dev_attr_temp1_input.dev_attr.attr)
1006                 dev_id = ASUS_WMI_DEVID_THERMAL_CTRL;
1007
1008         if (dev_id != -1) {
1009                 int err = asus_wmi_get_devstate(asus, dev_id, &value);
1010
1011                 if (err < 0)
1012                         return 0; /* can't return negative here */
1013         }
1014
1015         if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
1016                 /*
1017                  * We need to find a better way, probably using sfun,
1018                  * bits or spec ...
1019                  * Currently we disable it if:
1020                  * - ASUS_WMI_UNSUPPORTED_METHOD is returned
1021                  * - reverved bits are non-zero
1022                  * - sfun and presence bit are not set
1023                  */
1024                 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
1025                     || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
1026                         ok = false;
1027         } else if (dev_id == ASUS_WMI_DEVID_THERMAL_CTRL) {
1028                 /* If value is zero, something is clearly wrong */
1029                 if (value == 0)
1030                         ok = false;
1031         }
1032
1033         return ok ? attr->mode : 0;
1034 }
1035
1036 static struct attribute_group hwmon_attribute_group = {
1037         .is_visible = asus_hwmon_sysfs_is_visible,
1038         .attrs = hwmon_attributes
1039 };
1040
1041 static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
1042 {
1043         struct device *hwmon;
1044
1045         hwmon = asus->hwmon_device;
1046         if (!hwmon)
1047                 return;
1048         sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
1049         hwmon_device_unregister(hwmon);
1050         asus->hwmon_device = NULL;
1051 }
1052
1053 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
1054 {
1055         struct device *hwmon;
1056         int result;
1057
1058         hwmon = hwmon_device_register(&asus->platform_device->dev);
1059         if (IS_ERR(hwmon)) {
1060                 pr_err("Could not register asus hwmon device\n");
1061                 return PTR_ERR(hwmon);
1062         }
1063         dev_set_drvdata(hwmon, asus);
1064         asus->hwmon_device = hwmon;
1065         result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
1066         if (result)
1067                 asus_wmi_hwmon_exit(asus);
1068         return result;
1069 }
1070
1071 /*
1072  * Backlight
1073  */
1074 static int read_backlight_power(struct asus_wmi *asus)
1075 {
1076         int ret = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_BACKLIGHT);
1077
1078         if (ret < 0)
1079                 return ret;
1080
1081         return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1082 }
1083
1084 static int read_brightness_max(struct asus_wmi *asus)
1085 {
1086         u32 retval;
1087         int err;
1088
1089         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1090
1091         if (err < 0)
1092                 return err;
1093
1094         retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1095         retval >>= 8;
1096
1097         if (!retval)
1098                 return -ENODEV;
1099
1100         return retval;
1101 }
1102
1103 static int read_brightness(struct backlight_device *bd)
1104 {
1105         struct asus_wmi *asus = bl_get_data(bd);
1106         u32 retval;
1107         int err;
1108
1109         err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1110
1111         if (err < 0)
1112                 return err;
1113
1114         return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1115 }
1116
1117 static int update_bl_status(struct backlight_device *bd)
1118 {
1119         struct asus_wmi *asus = bl_get_data(bd);
1120         u32 ctrl_param;
1121         int power, err;
1122
1123         ctrl_param = bd->props.brightness;
1124
1125         err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1126                                     ctrl_param, NULL);
1127
1128         if (err < 0)
1129                 return err;
1130
1131         power = read_backlight_power(asus);
1132         if (power != -ENODEV && bd->props.power != power) {
1133                 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1134                 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1135                                             ctrl_param, NULL);
1136         }
1137         return err;
1138 }
1139
1140 static const struct backlight_ops asus_wmi_bl_ops = {
1141         .get_brightness = read_brightness,
1142         .update_status = update_bl_status,
1143 };
1144
1145 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1146 {
1147         struct backlight_device *bd = asus->backlight_device;
1148         int old = bd->props.brightness;
1149         int new = old;
1150
1151         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1152                 new = code - NOTIFY_BRNUP_MIN + 1;
1153         else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1154                 new = code - NOTIFY_BRNDOWN_MIN;
1155
1156         bd->props.brightness = new;
1157         backlight_update_status(bd);
1158         backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1159
1160         return old;
1161 }
1162
1163 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1164 {
1165         struct backlight_device *bd;
1166         struct backlight_properties props;
1167         int max;
1168         int power;
1169
1170         max = read_brightness_max(asus);
1171
1172         if (max == -ENODEV)
1173                 max = 0;
1174         else if (max < 0)
1175                 return max;
1176
1177         power = read_backlight_power(asus);
1178
1179         if (power == -ENODEV)
1180                 power = FB_BLANK_UNBLANK;
1181         else if (power < 0)
1182                 return power;
1183
1184         memset(&props, 0, sizeof(struct backlight_properties));
1185         props.type = BACKLIGHT_PLATFORM;
1186         props.max_brightness = max;
1187         bd = backlight_device_register(asus->driver->name,
1188                                        &asus->platform_device->dev, asus,
1189                                        &asus_wmi_bl_ops, &props);
1190         if (IS_ERR(bd)) {
1191                 pr_err("Could not register backlight device\n");
1192                 return PTR_ERR(bd);
1193         }
1194
1195         asus->backlight_device = bd;
1196
1197         bd->props.brightness = read_brightness(bd);
1198         bd->props.power = power;
1199         backlight_update_status(bd);
1200
1201         return 0;
1202 }
1203
1204 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1205 {
1206         if (asus->backlight_device)
1207                 backlight_device_unregister(asus->backlight_device);
1208
1209         asus->backlight_device = NULL;
1210 }
1211
1212 static void asus_wmi_notify(u32 value, void *context)
1213 {
1214         struct asus_wmi *asus = context;
1215         struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1216         union acpi_object *obj;
1217         acpi_status status;
1218         int code;
1219         int orig_code;
1220         unsigned int key_value = 1;
1221         bool autorelease = 1;
1222
1223         status = wmi_get_event_data(value, &response);
1224         if (status != AE_OK) {
1225                 pr_err("bad event status 0x%x\n", status);
1226                 return;
1227         }
1228
1229         obj = (union acpi_object *)response.pointer;
1230
1231         if (!obj || obj->type != ACPI_TYPE_INTEGER)
1232                 goto exit;
1233
1234         code = obj->integer.value;
1235         orig_code = code;
1236
1237         if (asus->driver->key_filter) {
1238                 asus->driver->key_filter(asus->driver, &code, &key_value,
1239                                          &autorelease);
1240                 if (code == ASUS_WMI_KEY_IGNORE)
1241                         goto exit;
1242         }
1243
1244         if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1245                 code = NOTIFY_BRNUP_MIN;
1246         else if (code >= NOTIFY_BRNDOWN_MIN &&
1247                  code <= NOTIFY_BRNDOWN_MAX)
1248                 code = NOTIFY_BRNDOWN_MIN;
1249
1250         if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
1251                 if (!acpi_video_backlight_support())
1252                         asus_wmi_backlight_notify(asus, orig_code);
1253         } else if (!sparse_keymap_report_event(asus->inputdev, code,
1254                                                key_value, autorelease))
1255                 pr_info("Unknown key %x pressed\n", code);
1256
1257 exit:
1258         kfree(obj);
1259 }
1260
1261 /*
1262  * Sys helpers
1263  */
1264 static int parse_arg(const char *buf, unsigned long count, int *val)
1265 {
1266         if (!count)
1267                 return 0;
1268         if (sscanf(buf, "%i", val) != 1)
1269                 return -EINVAL;
1270         return count;
1271 }
1272
1273 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1274                              const char *buf, size_t count)
1275 {
1276         u32 retval;
1277         int rv, err, value;
1278
1279         value = asus_wmi_get_devstate_simple(asus, devid);
1280         if (value == -ENODEV)   /* Check device presence */
1281                 return value;
1282
1283         rv = parse_arg(buf, count, &value);
1284         err = asus_wmi_set_devstate(devid, value, &retval);
1285
1286         if (err < 0)
1287                 return err;
1288
1289         return rv;
1290 }
1291
1292 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1293 {
1294         int value = asus_wmi_get_devstate_simple(asus, devid);
1295
1296         if (value < 0)
1297                 return value;
1298
1299         return sprintf(buf, "%d\n", value);
1300 }
1301
1302 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm)                  \
1303         static ssize_t show_##_name(struct device *dev,                 \
1304                                     struct device_attribute *attr,      \
1305                                     char *buf)                          \
1306         {                                                               \
1307                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1308                                                                         \
1309                 return show_sys_wmi(asus, _cm, buf);                    \
1310         }                                                               \
1311         static ssize_t store_##_name(struct device *dev,                \
1312                                      struct device_attribute *attr,     \
1313                                      const char *buf, size_t count)     \
1314         {                                                               \
1315                 struct asus_wmi *asus = dev_get_drvdata(dev);           \
1316                                                                         \
1317                 return store_sys_wmi(asus, _cm, buf, count);            \
1318         }                                                               \
1319         static struct device_attribute dev_attr_##_name = {             \
1320                 .attr = {                                               \
1321                         .name = __stringify(_name),                     \
1322                         .mode = _mode },                                \
1323                 .show   = show_##_name,                                 \
1324                 .store  = store_##_name,                                \
1325         }
1326
1327 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1328 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1329 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1330
1331 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1332                            const char *buf, size_t count)
1333 {
1334         int value, rv;
1335
1336         if (!count || sscanf(buf, "%i", &value) != 1)
1337                 return -EINVAL;
1338         if (value < 0 || value > 2)
1339                 return -EINVAL;
1340
1341         rv = asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1342         if (rv < 0)
1343                 return rv;
1344
1345         return count;
1346 }
1347
1348 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1349
1350 static struct attribute *platform_attributes[] = {
1351         &dev_attr_cpufv.attr,
1352         &dev_attr_camera.attr,
1353         &dev_attr_cardr.attr,
1354         &dev_attr_touchpad.attr,
1355         NULL
1356 };
1357
1358 static mode_t asus_sysfs_is_visible(struct kobject *kobj,
1359                                     struct attribute *attr, int idx)
1360 {
1361         struct device *dev = container_of(kobj, struct device, kobj);
1362         struct platform_device *pdev = to_platform_device(dev);
1363         struct asus_wmi *asus = platform_get_drvdata(pdev);
1364         bool ok = true;
1365         int devid = -1;
1366
1367         if (attr == &dev_attr_camera.attr)
1368                 devid = ASUS_WMI_DEVID_CAMERA;
1369         else if (attr == &dev_attr_cardr.attr)
1370                 devid = ASUS_WMI_DEVID_CARDREADER;
1371         else if (attr == &dev_attr_touchpad.attr)
1372                 devid = ASUS_WMI_DEVID_TOUCHPAD;
1373
1374         if (devid != -1)
1375                 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1376
1377         return ok ? attr->mode : 0;
1378 }
1379
1380 static struct attribute_group platform_attribute_group = {
1381         .is_visible = asus_sysfs_is_visible,
1382         .attrs = platform_attributes
1383 };
1384
1385 static void asus_wmi_sysfs_exit(struct platform_device *device)
1386 {
1387         sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1388 }
1389
1390 static int asus_wmi_sysfs_init(struct platform_device *device)
1391 {
1392         return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1393 }
1394
1395 /*
1396  * Platform device
1397  */
1398 static int asus_wmi_platform_init(struct asus_wmi *asus)
1399 {
1400         int rv;
1401
1402         /* INIT enable hotkeys on some models */
1403         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1404                 pr_info("Initialization: %#x", rv);
1405
1406         /* We don't know yet what to do with this version... */
1407         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1408                 pr_info("BIOS WMI version: %d.%d", rv >> 16, rv & 0xFF);
1409                 asus->spec = rv;
1410         }
1411
1412         /*
1413          * The SFUN method probably allows the original driver to get the list
1414          * of features supported by a given model. For now, 0x0100 or 0x0800
1415          * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1416          * The significance of others is yet to be found.
1417          */
1418         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1419                 pr_info("SFUN value: %#x", rv);
1420                 asus->sfun = rv;
1421         }
1422
1423         /*
1424          * Eee PC and Notebooks seems to have different method_id for DSTS,
1425          * but it may also be related to the BIOS's SPEC.
1426          * Note, on most Eeepc, there is no way to check if a method exist
1427          * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1428          * but once again, SPEC may probably be used for that kind of things.
1429          */
1430         if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1431                 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1432         else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
1433                 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1434
1435         if (!asus->dsts_id) {
1436                 pr_err("Can't find DSTS");
1437                 return -ENODEV;
1438         }
1439
1440         /* CWAP allow to define the behavior of the Fn+F2 key,
1441          * this method doesn't seems to be present on Eee PCs */
1442         if (asus->driver->wapf >= 0)
1443                 asus_wmi_set_devstate(ASUS_WMI_DEVID_CWAP,
1444                                       asus->driver->wapf, NULL);
1445
1446         return asus_wmi_sysfs_init(asus->platform_device);
1447 }
1448
1449 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1450 {
1451         asus_wmi_sysfs_exit(asus->platform_device);
1452 }
1453
1454 /*
1455  * debugfs
1456  */
1457 struct asus_wmi_debugfs_node {
1458         struct asus_wmi *asus;
1459         char *name;
1460         int (*show) (struct seq_file *m, void *data);
1461 };
1462
1463 static int show_dsts(struct seq_file *m, void *data)
1464 {
1465         struct asus_wmi *asus = m->private;
1466         int err;
1467         u32 retval = -1;
1468
1469         err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1470
1471         if (err < 0)
1472                 return err;
1473
1474         seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1475
1476         return 0;
1477 }
1478
1479 static int show_devs(struct seq_file *m, void *data)
1480 {
1481         struct asus_wmi *asus = m->private;
1482         int err;
1483         u32 retval = -1;
1484
1485         err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1486                                     &retval);
1487
1488         if (err < 0)
1489                 return err;
1490
1491         seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1492                    asus->debug.ctrl_param, retval);
1493
1494         return 0;
1495 }
1496
1497 static int show_call(struct seq_file *m, void *data)
1498 {
1499         struct asus_wmi *asus = m->private;
1500         struct bios_args args = {
1501                 .arg0 = asus->debug.dev_id,
1502                 .arg1 = asus->debug.ctrl_param,
1503         };
1504         struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1505         struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1506         union acpi_object *obj;
1507         acpi_status status;
1508
1509         status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1510                                      1, asus->debug.method_id,
1511                                      &input, &output);
1512
1513         if (ACPI_FAILURE(status))
1514                 return -EIO;
1515
1516         obj = (union acpi_object *)output.pointer;
1517         if (obj && obj->type == ACPI_TYPE_INTEGER)
1518                 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1519                            asus->debug.dev_id, asus->debug.ctrl_param,
1520                            (u32) obj->integer.value);
1521         else
1522                 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1523                            asus->debug.dev_id, asus->debug.ctrl_param,
1524                            obj ? obj->type : -1);
1525
1526         kfree(obj);
1527
1528         return 0;
1529 }
1530
1531 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1532         {NULL, "devs", show_devs},
1533         {NULL, "dsts", show_dsts},
1534         {NULL, "call", show_call},
1535 };
1536
1537 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1538 {
1539         struct asus_wmi_debugfs_node *node = inode->i_private;
1540
1541         return single_open(file, node->show, node->asus);
1542 }
1543
1544 static const struct file_operations asus_wmi_debugfs_io_ops = {
1545         .owner = THIS_MODULE,
1546         .open = asus_wmi_debugfs_open,
1547         .read = seq_read,
1548         .llseek = seq_lseek,
1549         .release = single_release,
1550 };
1551
1552 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1553 {
1554         debugfs_remove_recursive(asus->debug.root);
1555 }
1556
1557 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1558 {
1559         struct dentry *dent;
1560         int i;
1561
1562         asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1563         if (!asus->debug.root) {
1564                 pr_err("failed to create debugfs directory");
1565                 goto error_debugfs;
1566         }
1567
1568         dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1569                                   asus->debug.root, &asus->debug.method_id);
1570         if (!dent)
1571                 goto error_debugfs;
1572
1573         dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1574                                   asus->debug.root, &asus->debug.dev_id);
1575         if (!dent)
1576                 goto error_debugfs;
1577
1578         dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1579                                   asus->debug.root, &asus->debug.ctrl_param);
1580         if (!dent)
1581                 goto error_debugfs;
1582
1583         for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1584                 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1585
1586                 node->asus = asus;
1587                 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1588                                            asus->debug.root, node,
1589                                            &asus_wmi_debugfs_io_ops);
1590                 if (!dent) {
1591                         pr_err("failed to create debug file: %s\n", node->name);
1592                         goto error_debugfs;
1593                 }
1594         }
1595
1596         return 0;
1597
1598 error_debugfs:
1599         asus_wmi_debugfs_exit(asus);
1600         return -ENOMEM;
1601 }
1602
1603 /*
1604  * WMI Driver
1605  */
1606 static int asus_wmi_add(struct platform_device *pdev)
1607 {
1608         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1609         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1610         struct asus_wmi *asus;
1611         acpi_status status;
1612         int err;
1613
1614         asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1615         if (!asus)
1616                 return -ENOMEM;
1617
1618         asus->driver = wdrv;
1619         asus->platform_device = pdev;
1620         wdrv->platform_device = pdev;
1621         platform_set_drvdata(asus->platform_device, asus);
1622
1623         if (wdrv->quirks)
1624                 wdrv->quirks(asus->driver);
1625
1626         err = asus_wmi_platform_init(asus);
1627         if (err)
1628                 goto fail_platform;
1629
1630         err = asus_wmi_input_init(asus);
1631         if (err)
1632                 goto fail_input;
1633
1634         err = asus_wmi_hwmon_init(asus);
1635         if (err)
1636                 goto fail_hwmon;
1637
1638         err = asus_wmi_led_init(asus);
1639         if (err)
1640                 goto fail_leds;
1641
1642         err = asus_wmi_rfkill_init(asus);
1643         if (err)
1644                 goto fail_rfkill;
1645
1646         if (!acpi_video_backlight_support()) {
1647                 err = asus_wmi_backlight_init(asus);
1648                 if (err && err != -ENODEV)
1649                         goto fail_backlight;
1650         } else
1651                 pr_info("Backlight controlled by ACPI video driver\n");
1652
1653         status = wmi_install_notify_handler(asus->driver->event_guid,
1654                                             asus_wmi_notify, asus);
1655         if (ACPI_FAILURE(status)) {
1656                 pr_err("Unable to register notify handler - %d\n", status);
1657                 err = -ENODEV;
1658                 goto fail_wmi_handler;
1659         }
1660
1661         err = asus_wmi_debugfs_init(asus);
1662         if (err)
1663                 goto fail_debugfs;
1664
1665         return 0;
1666
1667 fail_debugfs:
1668         wmi_remove_notify_handler(asus->driver->event_guid);
1669 fail_wmi_handler:
1670         asus_wmi_backlight_exit(asus);
1671 fail_backlight:
1672         asus_wmi_rfkill_exit(asus);
1673 fail_rfkill:
1674         asus_wmi_led_exit(asus);
1675 fail_leds:
1676         asus_wmi_hwmon_exit(asus);
1677 fail_hwmon:
1678         asus_wmi_input_exit(asus);
1679 fail_input:
1680         asus_wmi_platform_exit(asus);
1681 fail_platform:
1682         kfree(asus);
1683         return err;
1684 }
1685
1686 static int asus_wmi_remove(struct platform_device *device)
1687 {
1688         struct asus_wmi *asus;
1689
1690         asus = platform_get_drvdata(device);
1691         wmi_remove_notify_handler(asus->driver->event_guid);
1692         asus_wmi_backlight_exit(asus);
1693         asus_wmi_input_exit(asus);
1694         asus_wmi_hwmon_exit(asus);
1695         asus_wmi_led_exit(asus);
1696         asus_wmi_rfkill_exit(asus);
1697         asus_wmi_debugfs_exit(asus);
1698         asus_wmi_platform_exit(asus);
1699
1700         kfree(asus);
1701         return 0;
1702 }
1703
1704 /*
1705  * Platform driver - hibernate/resume callbacks
1706  */
1707 static int asus_hotk_thaw(struct device *device)
1708 {
1709         struct asus_wmi *asus = dev_get_drvdata(device);
1710
1711         if (asus->wlan.rfkill) {
1712                 bool wlan;
1713
1714                 /*
1715                  * Work around bios bug - acpi _PTS turns off the wireless led
1716                  * during suspend.  Normally it restores it on resume, but
1717                  * we should kick it ourselves in case hibernation is aborted.
1718                  */
1719                 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1720                 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1721         }
1722
1723         return 0;
1724 }
1725
1726 static int asus_hotk_restore(struct device *device)
1727 {
1728         struct asus_wmi *asus = dev_get_drvdata(device);
1729         int bl;
1730
1731         /* Refresh both wlan rfkill state and pci hotplug */
1732         if (asus->wlan.rfkill)
1733                 asus_rfkill_hotplug(asus);
1734
1735         if (asus->bluetooth.rfkill) {
1736                 bl = !asus_wmi_get_devstate_simple(asus,
1737                                                    ASUS_WMI_DEVID_BLUETOOTH);
1738                 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1739         }
1740         if (asus->wimax.rfkill) {
1741                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1742                 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1743         }
1744         if (asus->wwan3g.rfkill) {
1745                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1746                 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1747         }
1748         if (asus->gps.rfkill) {
1749                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_GPS);
1750                 rfkill_set_sw_state(asus->gps.rfkill, bl);
1751         }
1752         if (asus->uwb.rfkill) {
1753                 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_UWB);
1754                 rfkill_set_sw_state(asus->uwb.rfkill, bl);
1755         }
1756
1757         return 0;
1758 }
1759
1760 static const struct dev_pm_ops asus_pm_ops = {
1761         .thaw = asus_hotk_thaw,
1762         .restore = asus_hotk_restore,
1763 };
1764
1765 static int asus_wmi_probe(struct platform_device *pdev)
1766 {
1767         struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1768         struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1769         int ret;
1770
1771         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1772                 pr_warn("Management GUID not found\n");
1773                 return -ENODEV;
1774         }
1775
1776         if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1777                 pr_warn("Event GUID not found\n");
1778                 return -ENODEV;
1779         }
1780
1781         if (wdrv->probe) {
1782                 ret = wdrv->probe(pdev);
1783                 if (ret)
1784                         return ret;
1785         }
1786
1787         return asus_wmi_add(pdev);
1788 }
1789
1790 static bool used;
1791
1792 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1793 {
1794         struct platform_driver *platform_driver;
1795         struct platform_device *platform_device;
1796
1797         if (used)
1798                 return -EBUSY;
1799
1800         platform_driver = &driver->platform_driver;
1801         platform_driver->remove = asus_wmi_remove;
1802         platform_driver->driver.owner = driver->owner;
1803         platform_driver->driver.name = driver->name;
1804         platform_driver->driver.pm = &asus_pm_ops;
1805
1806         platform_device = platform_create_bundle(platform_driver,
1807                                                  asus_wmi_probe,
1808                                                  NULL, 0, NULL, 0);
1809         if (IS_ERR(platform_device))
1810                 return PTR_ERR(platform_device);
1811
1812         used = true;
1813         return 0;
1814 }
1815 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1816
1817 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1818 {
1819         platform_device_unregister(driver->platform_device);
1820         platform_driver_unregister(&driver->platform_driver);
1821         used = false;
1822 }
1823 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1824
1825 static int __init asus_wmi_init(void)
1826 {
1827         if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1828                 pr_info("Asus Management GUID not found");
1829                 return -ENODEV;
1830         }
1831
1832         pr_info("ASUS WMI generic driver loaded");
1833         return 0;
1834 }
1835
1836 static void __exit asus_wmi_exit(void)
1837 {
1838         pr_info("ASUS WMI generic driver unloaded");
1839 }
1840
1841 module_init(asus_wmi_init);
1842 module_exit(asus_wmi_exit);