projects / deliverable / linux.git / blob
? search:


88596ea0f74e00ac1dda2fd9341d376fa97730ea
[deliverable/linux.git] / drivers / platform / x86 / asus-wmi.c
1 /*
2 * Asus PC WMI hotkey driver
3 *
4 * Copyright(C) 2010 Intel Corporation.
5 * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
6 *
7 * Portions based on wistron_btns.c:
8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/slab.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/fb.h>
37 #include <linux/backlight.h>
38 #include <linux/leds.h>
39 #include <linux/rfkill.h>
40 #include <linux/pci.h>
41 #include <linux/pci_hotplug.h>
42 #include <linux/debugfs.h>
43 #include <linux/seq_file.h>
44 #include <linux/platform_device.h>
45 #include <acpi/acpi_bus.h>
46 #include <acpi/acpi_drivers.h>
47
48 #include "asus-wmi.h"
49
50 MODULE_AUTHOR("Corentin Chary <corentincj@iksaif.net>, "
51 "Yong Wang <yong.y.wang@intel.com>");
52 MODULE_DESCRIPTION("Asus Generic WMI Driver");
53 MODULE_LICENSE("GPL");
54
55 #define to_platform_driver(drv) \
56 (container_of((drv), struct platform_driver, driver))
57
58 #define to_asus_wmi_driver(pdrv) \
59 (container_of((pdrv), struct asus_wmi_driver, platform_driver))
60
61 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
62
63 #define NOTIFY_BRNUP_MIN 0x11
64 #define NOTIFY_BRNUP_MAX 0x1f
65 #define NOTIFY_BRNDOWN_MIN 0x20
66 #define NOTIFY_BRNDOWN_MAX 0x2e
67
68 /* WMI Methods */
69 #define ASUS_WMI_METHODID_SPEC 0x43455053
70 #define ASUS_WMI_METHODID_SFUN 0x4E554653
71 #define ASUS_WMI_METHODID_DSTS 0x53544344
72 #define ASUS_WMI_METHODID_DSTS2 0x53545344
73 #define ASUS_WMI_METHODID_DEVS 0x53564544
74 #define ASUS_WMI_METHODID_CFVS 0x53564643
75 #define ASUS_WMI_METHODID_INIT 0x54494E49
76
77 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE
78
79 /* Wireless */
80 #define ASUS_WMI_DEVID_WLAN 0x00010011
81 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013
82 #define ASUS_WMI_DEVID_WIMAX 0x00010017
83 #define ASUS_WMI_DEVID_WWAN3G 0x00010019
84
85 /* Backlight and Brightness */
86 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
87 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
88
89 /* Misc */
90 #define ASUS_WMI_DEVID_CAMERA 0x00060013
91
92 /* Storage */
93 #define ASUS_WMI_DEVID_CARDREADER 0x00080013
94
95 /* Input */
96 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
97 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
98
99 /* DSTS masks */
100 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
101 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
102 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000
103 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
104 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
105
106 struct bios_args {
107 u32 arg0;
108 u32 arg1;
109 } __packed;
110
111 /*
112 * <platform>/ - debugfs root directory
113 * dev_id - current dev_id
114 * ctrl_param - current ctrl_param
115 * devs - call DEVS(dev_id, ctrl_param) and print result
116 * dsts - call DSTS(dev_id) and print result
117 */
118 struct asus_wmi_debug {
119 struct dentry *root;
120 u32 dev_id;
121 u32 ctrl_param;
122 };
123
124 struct asus_rfkill {
125 struct asus_wmi *asus;
126 struct rfkill *rfkill;
127 u32 dev_id;
128 };
129
130 struct asus_wmi {
131 int dsts_id;
132 int spec;
133 int sfun;
134
135 struct input_dev *inputdev;
136 struct backlight_device *backlight_device;
137 struct platform_device *platform_device;
138
139 struct led_classdev tpd_led;
140 int tpd_led_wk;
141 struct workqueue_struct *led_workqueue;
142 struct work_struct tpd_led_work;
143
144 struct asus_rfkill wlan;
145 struct asus_rfkill bluetooth;
146 struct asus_rfkill wimax;
147 struct asus_rfkill wwan3g;
148
149 struct hotplug_slot *hotplug_slot;
150 struct mutex hotplug_lock;
151 struct mutex wmi_lock;
152 struct workqueue_struct *hotplug_workqueue;
153 struct work_struct hotplug_work;
154
155 struct asus_wmi_debug debug;
156
157 struct asus_wmi_driver *driver;
158 };
159
160 static int asus_wmi_input_init(struct asus_wmi *asus)
161 {
162 int err;
163
164 asus->inputdev = input_allocate_device();
165 if (!asus->inputdev)
166 return -ENOMEM;
167
168 asus->inputdev->name = asus->driver->input_phys;
169 asus->inputdev->phys = asus->driver->input_name;
170 asus->inputdev->id.bustype = BUS_HOST;
171 asus->inputdev->dev.parent = &asus->platform_device->dev;
172
173 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
174 if (err)
175 goto err_free_dev;
176
177 err = input_register_device(asus->inputdev);
178 if (err)
179 goto err_free_keymap;
180
181 return 0;
182
183 err_free_keymap:
184 sparse_keymap_free(asus->inputdev);
185 err_free_dev:
186 input_free_device(asus->inputdev);
187 return err;
188 }
189
190 static void asus_wmi_input_exit(struct asus_wmi *asus)
191 {
192 if (asus->inputdev) {
193 sparse_keymap_free(asus->inputdev);
194 input_unregister_device(asus->inputdev);
195 }
196
197 asus->inputdev = NULL;
198 }
199
200 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
201 u32 *retval)
202 {
203 struct bios_args args = {
204 .arg0 = arg0,
205 .arg1 = arg1,
206 };
207 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
208 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
209 acpi_status status;
210 union acpi_object *obj;
211 u32 tmp;
212
213 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
214 &input, &output);
215
216 if (ACPI_FAILURE(status))
217 goto exit;
218
219 obj = (union acpi_object *)output.pointer;
220 if (obj && obj->type == ACPI_TYPE_INTEGER)
221 tmp = (u32) obj->integer.value;
222 else
223 tmp = 0;
224
225 if (retval)
226 *retval = tmp;
227
228 kfree(obj);
229
230 exit:
231 if (ACPI_FAILURE(status))
232 return -EIO;
233
234 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
235 return -ENODEV;
236
237 return 0;
238 }
239
240 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
241 {
242 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
243 }
244
245 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
246 u32 *retval)
247 {
248 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
249 ctrl_param, retval);
250 }
251
252 /* Helper for special devices with magic return codes */
253 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
254 u32 dev_id, u32 mask)
255 {
256 u32 retval = 0;
257 int err;
258
259 err = asus_wmi_get_devstate(asus, dev_id, &retval);
260
261 if (err < 0)
262 return err;
263
264 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
265 return -ENODEV;
266
267 if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
268 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
269 return -ENODEV;
270 }
271
272 return retval & mask;
273 }
274
275 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
276 {
277 return asus_wmi_get_devstate_bits(asus, dev_id,
278 ASUS_WMI_DSTS_STATUS_BIT);
279 }
280
281 /*
282 * LEDs
283 */
284 /*
285 * These functions actually update the LED's, and are called from a
286 * workqueue. By doing this as separate work rather than when the LED
287 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
288 * potentially bad time, such as a timer interrupt.
289 */
290 static void tpd_led_update(struct work_struct *work)
291 {
292 int ctrl_param;
293 struct asus_wmi *asus;
294
295 asus = container_of(work, struct asus_wmi, tpd_led_work);
296
297 ctrl_param = asus->tpd_led_wk;
298 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
299 }
300
301 static void tpd_led_set(struct led_classdev *led_cdev,
302 enum led_brightness value)
303 {
304 struct asus_wmi *asus;
305
306 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
307
308 asus->tpd_led_wk = !!value;
309 queue_work(asus->led_workqueue, &asus->tpd_led_work);
310 }
311
312 static int read_tpd_led_state(struct asus_wmi *asus)
313 {
314 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
315 }
316
317 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
318 {
319 struct asus_wmi *asus;
320
321 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
322
323 return read_tpd_led_state(asus);
324 }
325
326 static int asus_wmi_led_init(struct asus_wmi *asus)
327 {
328 int rv;
329
330 if (read_tpd_led_state(asus) < 0)
331 return 0;
332
333 asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
334 if (!asus->led_workqueue)
335 return -ENOMEM;
336 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
337
338 asus->tpd_led.name = "asus::touchpad";
339 asus->tpd_led.brightness_set = tpd_led_set;
340 asus->tpd_led.brightness_get = tpd_led_get;
341 asus->tpd_led.max_brightness = 1;
342
343 rv = led_classdev_register(&asus->platform_device->dev, &asus->tpd_led);
344 if (rv) {
345 destroy_workqueue(asus->led_workqueue);
346 return rv;
347 }
348
349 return 0;
350 }
351
352 static void asus_wmi_led_exit(struct asus_wmi *asus)
353 {
354 if (asus->tpd_led.dev)
355 led_classdev_unregister(&asus->tpd_led);
356 if (asus->led_workqueue)
357 destroy_workqueue(asus->led_workqueue);
358 }
359
360 /*
361 * PCI hotplug (for wlan rfkill)
362 */
363 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
364 {
365 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
366
367 if (result < 0)
368 return false;
369 return !result;
370 }
371
372 static void asus_rfkill_hotplug(struct asus_wmi *asus)
373 {
374 struct pci_dev *dev;
375 struct pci_bus *bus;
376 bool blocked;
377 bool absent;
378 u32 l;
379
380 mutex_lock(&asus->wmi_lock);
381 blocked = asus_wlan_rfkill_blocked(asus);
382 mutex_unlock(&asus->wmi_lock);
383
384 mutex_lock(&asus->hotplug_lock);
385
386 if (asus->wlan.rfkill)
387 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
388
389 if (asus->hotplug_slot) {
390 bus = pci_find_bus(0, 1);
391 if (!bus) {
392 pr_warning("Unable to find PCI bus 1?\n");
393 goto out_unlock;
394 }
395
396 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
397 pr_err("Unable to read PCI config space?\n");
398 goto out_unlock;
399 }
400 absent = (l == 0xffffffff);
401
402 if (blocked != absent) {
403 pr_warning("BIOS says wireless lan is %s, "
404 "but the pci device is %s\n",
405 blocked ? "blocked" : "unblocked",
406 absent ? "absent" : "present");
407 pr_warning("skipped wireless hotplug as probably "
408 "inappropriate for this model\n");
409 goto out_unlock;
410 }
411
412 if (!blocked) {
413 dev = pci_get_slot(bus, 0);
414 if (dev) {
415 /* Device already present */
416 pci_dev_put(dev);
417 goto out_unlock;
418 }
419 dev = pci_scan_single_device(bus, 0);
420 if (dev) {
421 pci_bus_assign_resources(bus);
422 if (pci_bus_add_device(dev))
423 pr_err("Unable to hotplug wifi\n");
424 }
425 } else {
426 dev = pci_get_slot(bus, 0);
427 if (dev) {
428 pci_remove_bus_device(dev);
429 pci_dev_put(dev);
430 }
431 }
432 }
433
434 out_unlock:
435 mutex_unlock(&asus->hotplug_lock);
436 }
437
438 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
439 {
440 struct asus_wmi *asus = data;
441
442 if (event != ACPI_NOTIFY_BUS_CHECK)
443 return;
444
445 /*
446 * We can't call directly asus_rfkill_hotplug because most
447 * of the time WMBC is still being executed and not reetrant.
448 * There is currently no way to tell ACPICA that we want this
449 * method to be serialized, we schedule a asus_rfkill_hotplug
450 * call later, in a safer context.
451 */
452 queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
453 }
454
455 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
456 {
457 acpi_status status;
458 acpi_handle handle;
459
460 status = acpi_get_handle(NULL, node, &handle);
461
462 if (ACPI_SUCCESS(status)) {
463 status = acpi_install_notify_handler(handle,
464 ACPI_SYSTEM_NOTIFY,
465 asus_rfkill_notify, asus);
466 if (ACPI_FAILURE(status))
467 pr_warning("Failed to register notify on %s\n", node);
468 } else
469 return -ENODEV;
470
471 return 0;
472 }
473
474 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
475 {
476 acpi_status status = AE_OK;
477 acpi_handle handle;
478
479 status = acpi_get_handle(NULL, node, &handle);
480
481 if (ACPI_SUCCESS(status)) {
482 status = acpi_remove_notify_handler(handle,
483 ACPI_SYSTEM_NOTIFY,
484 asus_rfkill_notify);
485 if (ACPI_FAILURE(status))
486 pr_err("Error removing rfkill notify handler %s\n",
487 node);
488 }
489 }
490
491 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
492 u8 *value)
493 {
494 struct asus_wmi *asus = hotplug_slot->private;
495 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
496
497 if (result < 0)
498 return result;
499
500 *value = !!result;
501 return 0;
502 }
503
504 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
505 {
506 kfree(hotplug_slot->info);
507 kfree(hotplug_slot);
508 }
509
510 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
511 .owner = THIS_MODULE,
512 .get_adapter_status = asus_get_adapter_status,
513 .get_power_status = asus_get_adapter_status,
514 };
515
516 static void asus_hotplug_work(struct work_struct *work)
517 {
518 struct asus_wmi *asus;
519
520 asus = container_of(work, struct asus_wmi, hotplug_work);
521 asus_rfkill_hotplug(asus);
522 }
523
524 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
525 {
526 int ret = -ENOMEM;
527 struct pci_bus *bus = pci_find_bus(0, 1);
528
529 if (!bus) {
530 pr_err("Unable to find wifi PCI bus\n");
531 return -ENODEV;
532 }
533
534 asus->hotplug_workqueue =
535 create_singlethread_workqueue("hotplug_workqueue");
536 if (!asus->hotplug_workqueue)
537 goto error_workqueue;
538
539 INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
540
541 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
542 if (!asus->hotplug_slot)
543 goto error_slot;
544
545 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
546 GFP_KERNEL);
547 if (!asus->hotplug_slot->info)
548 goto error_info;
549
550 asus->hotplug_slot->private = asus;
551 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
552 asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
553 asus_get_adapter_status(asus->hotplug_slot,
554 &asus->hotplug_slot->info->adapter_status);
555
556 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
557 if (ret) {
558 pr_err("Unable to register hotplug slot - %d\n", ret);
559 goto error_register;
560 }
561
562 return 0;
563
564 error_register:
565 kfree(asus->hotplug_slot->info);
566 error_info:
567 kfree(asus->hotplug_slot);
568 asus->hotplug_slot = NULL;
569 error_slot:
570 destroy_workqueue(asus->hotplug_workqueue);
571 error_workqueue:
572 return ret;
573 }
574
575 /*
576 * Rfkill devices
577 */
578 static int asus_rfkill_set(void *data, bool blocked)
579 {
580 struct asus_rfkill *priv = data;
581 u32 ctrl_param = !blocked;
582
583 return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL);
584 }
585
586 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
587 {
588 struct asus_rfkill *priv = data;
589 int result;
590
591 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
592
593 if (result < 0)
594 return;
595
596 rfkill_set_sw_state(priv->rfkill, !result);
597 }
598
599 static int asus_rfkill_wlan_set(void *data, bool blocked)
600 {
601 struct asus_rfkill *priv = data;
602 struct asus_wmi *asus = priv->asus;
603 int ret;
604
605 /*
606 * This handler is enabled only if hotplug is enabled.
607 * In this case, the asus_wmi_set_devstate() will
608 * trigger a wmi notification and we need to wait
609 * this call to finish before being able to call
610 * any wmi method
611 */
612 mutex_lock(&asus->wmi_lock);
613 ret = asus_rfkill_set(data, blocked);
614 mutex_unlock(&asus->wmi_lock);
615 return ret;
616 }
617
618 static const struct rfkill_ops asus_rfkill_wlan_ops = {
619 .set_block = asus_rfkill_wlan_set,
620 .query = asus_rfkill_query,
621 };
622
623 static const struct rfkill_ops asus_rfkill_ops = {
624 .set_block = asus_rfkill_set,
625 .query = asus_rfkill_query,
626 };
627
628 static int asus_new_rfkill(struct asus_wmi *asus,
629 struct asus_rfkill *arfkill,
630 const char *name, enum rfkill_type type, int dev_id)
631 {
632 int result = asus_wmi_get_devstate_simple(asus, dev_id);
633 struct rfkill **rfkill = &arfkill->rfkill;
634
635 if (result < 0)
636 return result;
637
638 arfkill->dev_id = dev_id;
639 arfkill->asus = asus;
640
641 if (dev_id == ASUS_WMI_DEVID_WLAN && asus->driver->hotplug_wireless)
642 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
643 &asus_rfkill_wlan_ops, arfkill);
644 else
645 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
646 &asus_rfkill_ops, arfkill);
647
648 if (!*rfkill)
649 return -EINVAL;
650
651 rfkill_init_sw_state(*rfkill, !result);
652 result = rfkill_register(*rfkill);
653 if (result) {
654 rfkill_destroy(*rfkill);
655 *rfkill = NULL;
656 return result;
657 }
658 return 0;
659 }
660
661 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
662 {
663 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
664 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
665 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
666 if (asus->wlan.rfkill) {
667 rfkill_unregister(asus->wlan.rfkill);
668 rfkill_destroy(asus->wlan.rfkill);
669 asus->wlan.rfkill = NULL;
670 }
671 /*
672 * Refresh pci hotplug in case the rfkill state was changed after
673 * asus_unregister_rfkill_notifier()
674 */
675 asus_rfkill_hotplug(asus);
676 if (asus->hotplug_slot)
677 pci_hp_deregister(asus->hotplug_slot);
678 if (asus->hotplug_workqueue)
679 destroy_workqueue(asus->hotplug_workqueue);
680
681 if (asus->bluetooth.rfkill) {
682 rfkill_unregister(asus->bluetooth.rfkill);
683 rfkill_destroy(asus->bluetooth.rfkill);
684 asus->bluetooth.rfkill = NULL;
685 }
686 if (asus->wimax.rfkill) {
687 rfkill_unregister(asus->wimax.rfkill);
688 rfkill_destroy(asus->wimax.rfkill);
689 asus->wimax.rfkill = NULL;
690 }
691 if (asus->wwan3g.rfkill) {
692 rfkill_unregister(asus->wwan3g.rfkill);
693 rfkill_destroy(asus->wwan3g.rfkill);
694 asus->wwan3g.rfkill = NULL;
695 }
696 }
697
698 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
699 {
700 int result = 0;
701
702 mutex_init(&asus->hotplug_lock);
703 mutex_init(&asus->wmi_lock);
704
705 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
706 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
707
708 if (result && result != -ENODEV)
709 goto exit;
710
711 result = asus_new_rfkill(asus, &asus->bluetooth,
712 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
713 ASUS_WMI_DEVID_BLUETOOTH);
714
715 if (result && result != -ENODEV)
716 goto exit;
717
718 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
719 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
720
721 if (result && result != -ENODEV)
722 goto exit;
723
724 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
725 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
726
727 if (result && result != -ENODEV)
728 goto exit;
729
730 if (!asus->driver->hotplug_wireless)
731 goto exit;
732
733 result = asus_setup_pci_hotplug(asus);
734 /*
735 * If we get -EBUSY then something else is handling the PCI hotplug -
736 * don't fail in this case
737 */
738 if (result == -EBUSY)
739 result = 0;
740
741 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
742 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
743 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
744 /*
745 * Refresh pci hotplug in case the rfkill state was changed during
746 * setup.
747 */
748 asus_rfkill_hotplug(asus);
749
750 exit:
751 if (result && result != -ENODEV)
752 asus_wmi_rfkill_exit(asus);
753
754 if (result == -ENODEV)
755 result = 0;
756
757 return result;
758 }
759
760 /*
761 * Backlight
762 */
763 static int read_backlight_power(struct asus_wmi *asus)
764 {
765 int ret = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_BACKLIGHT);
766
767 if (ret < 0)
768 return ret;
769
770 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
771 }
772
773 static int read_brightness_max(struct asus_wmi *asus)
774 {
775 u32 retval;
776 int err;
777
778 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
779
780 if (err < 0)
781 return err;
782
783 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
784 retval >>= 8;
785
786 if (!retval)
787 return -ENODEV;
788
789 return retval;
790 }
791
792 static int read_brightness(struct backlight_device *bd)
793 {
794 struct asus_wmi *asus = bl_get_data(bd);
795 u32 retval, err;
796
797 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
798
799 if (err < 0)
800 return err;
801
802 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
803 }
804
805 static int update_bl_status(struct backlight_device *bd)
806 {
807 struct asus_wmi *asus = bl_get_data(bd);
808 u32 ctrl_param;
809 int power, err;
810
811 ctrl_param = bd->props.brightness;
812
813 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
814 ctrl_param, NULL);
815
816 if (err < 0)
817 return err;
818
819 power = read_backlight_power(asus);
820 if (power != -ENODEV && bd->props.power != power) {
821 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
822 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
823 ctrl_param, NULL);
824 }
825 return err;
826 }
827
828 static const struct backlight_ops asus_wmi_bl_ops = {
829 .get_brightness = read_brightness,
830 .update_status = update_bl_status,
831 };
832
833 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
834 {
835 struct backlight_device *bd = asus->backlight_device;
836 int old = bd->props.brightness;
837 int new = old;
838
839 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
840 new = code - NOTIFY_BRNUP_MIN + 1;
841 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
842 new = code - NOTIFY_BRNDOWN_MIN;
843
844 bd->props.brightness = new;
845 backlight_update_status(bd);
846 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
847
848 return old;
849 }
850
851 static int asus_wmi_backlight_init(struct asus_wmi *asus)
852 {
853 struct backlight_device *bd;
854 struct backlight_properties props;
855 int max;
856 int power;
857
858 max = read_brightness_max(asus);
859
860 if (max == -ENODEV)
861 max = 0;
862 else if (max < 0)
863 return max;
864
865 power = read_backlight_power(asus);
866
867 if (power == -ENODEV)
868 power = FB_BLANK_UNBLANK;
869 else if (power < 0)
870 return power;
871
872 memset(&props, 0, sizeof(struct backlight_properties));
873 props.max_brightness = max;
874 bd = backlight_device_register(asus->driver->name,
875 &asus->platform_device->dev, asus,
876 &asus_wmi_bl_ops, &props);
877 if (IS_ERR(bd)) {
878 pr_err("Could not register backlight device\n");
879 return PTR_ERR(bd);
880 }
881
882 asus->backlight_device = bd;
883
884 bd->props.brightness = read_brightness(bd);
885 bd->props.power = power;
886 backlight_update_status(bd);
887
888 return 0;
889 }
890
891 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
892 {
893 if (asus->backlight_device)
894 backlight_device_unregister(asus->backlight_device);
895
896 asus->backlight_device = NULL;
897 }
898
899 static void asus_wmi_notify(u32 value, void *context)
900 {
901 struct asus_wmi *asus = context;
902 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
903 union acpi_object *obj;
904 acpi_status status;
905 int code;
906 int orig_code;
907
908 status = wmi_get_event_data(value, &response);
909 if (status != AE_OK) {
910 pr_err("bad event status 0x%x\n", status);
911 return;
912 }
913
914 obj = (union acpi_object *)response.pointer;
915
916 if (!obj || obj->type != ACPI_TYPE_INTEGER)
917 goto exit;
918
919 code = obj->integer.value;
920 orig_code = code;
921
922 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
923 code = NOTIFY_BRNUP_MIN;
924 else if (code >= NOTIFY_BRNDOWN_MIN &&
925 code <= NOTIFY_BRNDOWN_MAX)
926 code = NOTIFY_BRNDOWN_MIN;
927
928 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
929 if (!acpi_video_backlight_support())
930 asus_wmi_backlight_notify(asus, orig_code);
931 } else if (!sparse_keymap_report_event(asus->inputdev, code, 1, true))
932 pr_info("Unknown key %x pressed\n", code);
933
934 exit:
935 kfree(obj);
936 }
937
938 /*
939 * Sys helpers
940 */
941 static int parse_arg(const char *buf, unsigned long count, int *val)
942 {
943 if (!count)
944 return 0;
945 if (sscanf(buf, "%i", val) != 1)
946 return -EINVAL;
947 return count;
948 }
949
950 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
951 const char *buf, size_t count)
952 {
953 u32 retval;
954 int rv, err, value;
955
956 value = asus_wmi_get_devstate_simple(asus, devid);
957 if (value == -ENODEV) /* Check device presence */
958 return value;
959
960 rv = parse_arg(buf, count, &value);
961 err = asus_wmi_set_devstate(devid, value, &retval);
962
963 if (err < 0)
964 return err;
965
966 return rv;
967 }
968
969 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
970 {
971 int value = asus_wmi_get_devstate_simple(asus, devid);
972
973 if (value < 0)
974 return value;
975
976 return sprintf(buf, "%d\n", value);
977 }
978
979 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
980 static ssize_t show_##_name(struct device *dev, \
981 struct device_attribute *attr, \
982 char *buf) \
983 { \
984 struct asus_wmi *asus = dev_get_drvdata(dev); \
985 \
986 return show_sys_wmi(asus, _cm, buf); \
987 } \
988 static ssize_t store_##_name(struct device *dev, \
989 struct device_attribute *attr, \
990 const char *buf, size_t count) \
991 { \
992 struct asus_wmi *asus = dev_get_drvdata(dev); \
993 \
994 return store_sys_wmi(asus, _cm, buf, count); \
995 } \
996 static struct device_attribute dev_attr_##_name = { \
997 .attr = { \
998 .name = __stringify(_name), \
999 .mode = _mode }, \
1000 .show = show_##_name, \
1001 .store = store_##_name, \
1002 }
1003
1004 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1005 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1006 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1007
1008 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1009 const char *buf, size_t count)
1010 {
1011 int value;
1012
1013 if (!count || sscanf(buf, "%i", &value) != 1)
1014 return -EINVAL;
1015 if (value < 0 || value > 2)
1016 return -EINVAL;
1017
1018 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1019 }
1020
1021 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1022
1023 static struct attribute *platform_attributes[] = {
1024 &dev_attr_cpufv.attr,
1025 &dev_attr_camera.attr,
1026 &dev_attr_cardr.attr,
1027 &dev_attr_touchpad.attr,
1028 NULL
1029 };
1030
1031 static mode_t asus_sysfs_is_visible(struct kobject *kobj,
1032 struct attribute *attr, int idx)
1033 {
1034 struct device *dev = container_of(kobj, struct device, kobj);
1035 struct platform_device *pdev = to_platform_device(dev);
1036 struct asus_wmi *asus = platform_get_drvdata(pdev);
1037 bool ok = true;
1038 int devid = -1;
1039
1040 if (attr == &dev_attr_camera.attr)
1041 devid = ASUS_WMI_DEVID_CAMERA;
1042 else if (attr == &dev_attr_cardr.attr)
1043 devid = ASUS_WMI_DEVID_CARDREADER;
1044 else if (attr == &dev_attr_touchpad.attr)
1045 devid = ASUS_WMI_DEVID_TOUCHPAD;
1046
1047 if (devid != -1)
1048 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1049
1050 return ok ? attr->mode : 0;
1051 }
1052
1053 static struct attribute_group platform_attribute_group = {
1054 .is_visible = asus_sysfs_is_visible,
1055 .attrs = platform_attributes
1056 };
1057
1058 static void asus_wmi_sysfs_exit(struct platform_device *device)
1059 {
1060 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1061 }
1062
1063 static int asus_wmi_sysfs_init(struct platform_device *device)
1064 {
1065 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1066 }
1067
1068 /*
1069 * Platform device
1070 */
1071 static int __init asus_wmi_platform_init(struct asus_wmi *asus)
1072 {
1073 int rv;
1074
1075 /* INIT enable hotkeys on some models */
1076 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1077 pr_info("Initialization: %#x", rv);
1078
1079 /* We don't know yet what to do with this version... */
1080 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1081 pr_info("BIOS WMI version: %d.%d", rv >> 8, rv & 0xFF);
1082 asus->spec = rv;
1083 }
1084
1085 /*
1086 * The SFUN method probably allows the original driver to get the list
1087 * of features supported by a given model. For now, 0x0100 or 0x0800
1088 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1089 * The significance of others is yet to be found.
1090 */
1091 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1092 pr_info("SFUN value: %#x", rv);
1093 asus->sfun = rv;
1094 }
1095
1096 /*
1097 * Eee PC and Notebooks seems to have different method_id for DSTS,
1098 * but it may also be related to the BIOS's SPEC.
1099 * Note, on most Eeepc, there is no way to check if a method exist
1100 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1101 * but once again, SPEC may probably be used for that kind of things.
1102 */
1103 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1104 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1105 else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
1106 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1107
1108 if (!asus->dsts_id) {
1109 pr_err("Can't find DSTS");
1110 return -ENODEV;
1111 }
1112
1113 return asus_wmi_sysfs_init(asus->platform_device);
1114 }
1115
1116 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1117 {
1118 asus_wmi_sysfs_exit(asus->platform_device);
1119 }
1120
1121 /*
1122 * debugfs
1123 */
1124 struct asus_wmi_debugfs_node {
1125 struct asus_wmi *asus;
1126 char *name;
1127 int (*show) (struct seq_file *m, void *data);
1128 };
1129
1130 static int show_dsts(struct seq_file *m, void *data)
1131 {
1132 struct asus_wmi *asus = m->private;
1133 int err;
1134 u32 retval = -1;
1135
1136 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1137
1138 if (err < 0)
1139 return err;
1140
1141 seq_printf(m, "DSTS(%x) = %x\n", asus->debug.dev_id, retval);
1142
1143 return 0;
1144 }
1145
1146 static int show_devs(struct seq_file *m, void *data)
1147 {
1148 struct asus_wmi *asus = m->private;
1149 int err;
1150 u32 retval = -1;
1151
1152 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1153 &retval);
1154
1155 if (err < 0)
1156 return err;
1157
1158 seq_printf(m, "DEVS(%x, %x) = %x\n", asus->debug.dev_id,
1159 asus->debug.ctrl_param, retval);
1160
1161 return 0;
1162 }
1163
1164 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1165 {NULL, "devs", show_devs},
1166 {NULL, "dsts", show_dsts},
1167 };
1168
1169 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1170 {
1171 struct asus_wmi_debugfs_node *node = inode->i_private;
1172
1173 return single_open(file, node->show, node->asus);
1174 }
1175
1176 static const struct file_operations asus_wmi_debugfs_io_ops = {
1177 .owner = THIS_MODULE,
1178 .open = asus_wmi_debugfs_open,
1179 .read = seq_read,
1180 .llseek = seq_lseek,
1181 .release = single_release,
1182 };
1183
1184 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1185 {
1186 debugfs_remove_recursive(asus->debug.root);
1187 }
1188
1189 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1190 {
1191 struct dentry *dent;
1192 int i;
1193
1194 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1195 if (!asus->debug.root) {
1196 pr_err("failed to create debugfs directory");
1197 goto error_debugfs;
1198 }
1199
1200 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1201 asus->debug.root, &asus->debug.dev_id);
1202 if (!dent)
1203 goto error_debugfs;
1204
1205 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1206 asus->debug.root, &asus->debug.ctrl_param);
1207 if (!dent)
1208 goto error_debugfs;
1209
1210 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1211 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1212
1213 node->asus = asus;
1214 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1215 asus->debug.root, node,
1216 &asus_wmi_debugfs_io_ops);
1217 if (!dent) {
1218 pr_err("failed to create debug file: %s\n", node->name);
1219 goto error_debugfs;
1220 }
1221 }
1222
1223 return 0;
1224
1225 error_debugfs:
1226 asus_wmi_debugfs_exit(asus);
1227 return -ENOMEM;
1228 }
1229
1230 /*
1231 * WMI Driver
1232 */
1233 static int asus_wmi_add(struct platform_device *pdev)
1234 {
1235 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1236 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1237 struct asus_wmi *asus;
1238 acpi_status status;
1239 int err;
1240
1241 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1242 if (!asus)
1243 return -ENOMEM;
1244
1245 asus->driver = wdrv;
1246 asus->platform_device = pdev;
1247 wdrv->platform_device = pdev;
1248 platform_set_drvdata(asus->platform_device, asus);
1249
1250 if (wdrv->quirks)
1251 wdrv->quirks(asus->driver);
1252
1253 err = asus_wmi_platform_init(asus);
1254 if (err)
1255 goto fail_platform;
1256
1257 err = asus_wmi_input_init(asus);
1258 if (err)
1259 goto fail_input;
1260
1261 err = asus_wmi_led_init(asus);
1262 if (err)
1263 goto fail_leds;
1264
1265 err = asus_wmi_rfkill_init(asus);
1266 if (err)
1267 goto fail_rfkill;
1268
1269 if (!acpi_video_backlight_support()) {
1270 err = asus_wmi_backlight_init(asus);
1271 if (err && err != -ENODEV)
1272 goto fail_backlight;
1273 } else
1274 pr_info("Backlight controlled by ACPI video driver\n");
1275
1276 status = wmi_install_notify_handler(asus->driver->event_guid,
1277 asus_wmi_notify, asus);
1278 if (ACPI_FAILURE(status)) {
1279 pr_err("Unable to register notify handler - %d\n", status);
1280 err = -ENODEV;
1281 goto fail_wmi_handler;
1282 }
1283
1284 err = asus_wmi_debugfs_init(asus);
1285 if (err)
1286 goto fail_debugfs;
1287
1288 return 0;
1289
1290 fail_debugfs:
1291 wmi_remove_notify_handler(asus->driver->event_guid);
1292 fail_wmi_handler:
1293 asus_wmi_backlight_exit(asus);
1294 fail_backlight:
1295 asus_wmi_rfkill_exit(asus);
1296 fail_rfkill:
1297 asus_wmi_led_exit(asus);
1298 fail_leds:
1299 asus_wmi_input_exit(asus);
1300 fail_input:
1301 asus_wmi_platform_exit(asus);
1302 fail_platform:
1303 kfree(asus);
1304 return err;
1305 }
1306
1307 static int asus_wmi_remove(struct platform_device *device)
1308 {
1309 struct asus_wmi *asus;
1310
1311 asus = platform_get_drvdata(device);
1312 wmi_remove_notify_handler(asus->driver->event_guid);
1313 asus_wmi_backlight_exit(asus);
1314 asus_wmi_input_exit(asus);
1315 asus_wmi_led_exit(asus);
1316 asus_wmi_rfkill_exit(asus);
1317 asus_wmi_debugfs_exit(asus);
1318 asus_wmi_platform_exit(asus);
1319
1320 kfree(asus);
1321 return 0;
1322 }
1323
1324 /*
1325 * Platform driver - hibernate/resume callbacks
1326 */
1327 static int asus_hotk_thaw(struct device *device)
1328 {
1329 struct asus_wmi *asus = dev_get_drvdata(device);
1330
1331 if (asus->wlan.rfkill) {
1332 bool wlan;
1333
1334 /*
1335 * Work around bios bug - acpi _PTS turns off the wireless led
1336 * during suspend. Normally it restores it on resume, but
1337 * we should kick it ourselves in case hibernation is aborted.
1338 */
1339 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1340 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1341 }
1342
1343 return 0;
1344 }
1345
1346 static int asus_hotk_restore(struct device *device)
1347 {
1348 struct asus_wmi *asus = dev_get_drvdata(device);
1349 int bl;
1350
1351 /* Refresh both wlan rfkill state and pci hotplug */
1352 if (asus->wlan.rfkill)
1353 asus_rfkill_hotplug(asus);
1354
1355 if (asus->bluetooth.rfkill) {
1356 bl = !asus_wmi_get_devstate_simple(asus,
1357 ASUS_WMI_DEVID_BLUETOOTH);
1358 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1359 }
1360 if (asus->wimax.rfkill) {
1361 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1362 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1363 }
1364 if (asus->wwan3g.rfkill) {
1365 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1366 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1367 }
1368
1369 return 0;
1370 }
1371
1372 static const struct dev_pm_ops asus_pm_ops = {
1373 .thaw = asus_hotk_thaw,
1374 .restore = asus_hotk_restore,
1375 };
1376
1377 static int asus_wmi_probe(struct platform_device *pdev)
1378 {
1379 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1380 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1381 int ret;
1382
1383 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1384 pr_warning("Management GUID not found\n");
1385 return -ENODEV;
1386 }
1387
1388 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1389 pr_warning("Event GUID not found\n");
1390 return -ENODEV;
1391 }
1392
1393 if (wdrv->probe) {
1394 ret = wdrv->probe(pdev);
1395 if (ret)
1396 return ret;
1397 }
1398
1399 return asus_wmi_add(pdev);
1400 }
1401
1402 static bool used;
1403
1404 int asus_wmi_register_driver(struct asus_wmi_driver *driver)
1405 {
1406 struct platform_driver *platform_driver;
1407 struct platform_device *platform_device;
1408
1409 if (used)
1410 return -EBUSY;
1411
1412 platform_driver = &driver->platform_driver;
1413 platform_driver->remove = asus_wmi_remove;
1414 platform_driver->driver.owner = driver->owner;
1415 platform_driver->driver.name = driver->name;
1416 platform_driver->driver.pm = &asus_pm_ops;
1417
1418 platform_device = platform_create_bundle(platform_driver,
1419 asus_wmi_probe,
1420 NULL, 0, NULL, 0);
1421 if (IS_ERR(platform_device))
1422 return PTR_ERR(platform_device);
1423
1424 used = true;
1425 return 0;
1426 }
1427 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1428
1429 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1430 {
1431 platform_device_unregister(driver->platform_device);
1432 platform_driver_unregister(&driver->platform_driver);
1433 used = false;
1434 }
1435 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1436
1437 static int __init asus_wmi_init(void)
1438 {
1439 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1440 pr_info("Asus Management GUID not found");
1441 return -ENODEV;
1442 }
1443
1444 pr_info("ASUS WMI generic driver loaded");
1445 return 0;
1446 }
1447
1448 static void __exit asus_wmi_exit(void)
1449 {
1450 pr_info("ASUS WMI generic driver unloaded");
1451 }
1452
1453 module_init(asus_wmi_init);
1454 module_exit(asus_wmi_exit);
Linux kernel - Deliverables
This page took 0.058798 seconds and 4 git commands to generate.