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asus-wmi: fix keyboard backlight detection
[deliverable/linux.git] / drivers / platform / x86 / asus-wmi.c
1 /*
2 * Asus PC WMI hotkey driver
3 *
4 * Copyright(C) 2010 Intel Corporation.
5 * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
6 *
7 * Portions based on wistron_btns.c:
8 * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
9 * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
10 * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
28
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/types.h>
33 #include <linux/slab.h>
34 #include <linux/input.h>
35 #include <linux/input/sparse-keymap.h>
36 #include <linux/fb.h>
37 #include <linux/backlight.h>
38 #include <linux/leds.h>
39 #include <linux/rfkill.h>
40 #include <linux/pci.h>
41 #include <linux/pci_hotplug.h>
42 #include <linux/hwmon.h>
43 #include <linux/hwmon-sysfs.h>
44 #include <linux/debugfs.h>
45 #include <linux/seq_file.h>
46 #include <linux/platform_device.h>
47 #include <acpi/acpi_bus.h>
48 #include <acpi/acpi_drivers.h>
49
50 #include "asus-wmi.h"
51
52 MODULE_AUTHOR("Corentin Chary <corentincj@iksaif.net>, "
53 "Yong Wang <yong.y.wang@intel.com>");
54 MODULE_DESCRIPTION("Asus Generic WMI Driver");
55 MODULE_LICENSE("GPL");
56
57 #define to_platform_driver(drv) \
58 (container_of((drv), struct platform_driver, driver))
59
60 #define to_asus_wmi_driver(pdrv) \
61 (container_of((pdrv), struct asus_wmi_driver, platform_driver))
62
63 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
64
65 #define NOTIFY_BRNUP_MIN 0x11
66 #define NOTIFY_BRNUP_MAX 0x1f
67 #define NOTIFY_BRNDOWN_MIN 0x20
68 #define NOTIFY_BRNDOWN_MAX 0x2e
69 #define NOTIFY_KBD_BRTUP 0xc4
70 #define NOTIFY_KBD_BRTDWN 0xc5
71
72 /* WMI Methods */
73 #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS SPECification */
74 #define ASUS_WMI_METHODID_SFBD 0x44424653 /* Set First Boot Device */
75 #define ASUS_WMI_METHODID_GLCD 0x44434C47 /* Get LCD status */
76 #define ASUS_WMI_METHODID_GPID 0x44495047 /* Get Panel ID?? (Resol) */
77 #define ASUS_WMI_METHODID_QMOD 0x444F4D51 /* Quiet MODe */
78 #define ASUS_WMI_METHODID_SPLV 0x4C425053 /* Set Panel Light Value */
79 #define ASUS_WMI_METHODID_SFUN 0x4E554653 /* FUNCtionalities */
80 #define ASUS_WMI_METHODID_SDSP 0x50534453 /* Set DiSPlay output */
81 #define ASUS_WMI_METHODID_GDSP 0x50534447 /* Get DiSPlay output */
82 #define ASUS_WMI_METHODID_DEVP 0x50564544 /* DEVice Policy */
83 #define ASUS_WMI_METHODID_OSVR 0x5256534F /* OS VeRsion */
84 #define ASUS_WMI_METHODID_DSTS 0x53544344 /* Device STatuS */
85 #define ASUS_WMI_METHODID_DSTS2 0x53545344 /* Device STatuS #2*/
86 #define ASUS_WMI_METHODID_BSTS 0x53545342 /* Bios STatuS ? */
87 #define ASUS_WMI_METHODID_DEVS 0x53564544 /* DEVice Set */
88 #define ASUS_WMI_METHODID_CFVS 0x53564643 /* CPU Frequency Volt Set */
89 #define ASUS_WMI_METHODID_KBFT 0x5446424B /* KeyBoard FilTer */
90 #define ASUS_WMI_METHODID_INIT 0x54494E49 /* INITialize */
91 #define ASUS_WMI_METHODID_HKEY 0x59454B48 /* Hot KEY ?? */
92
93 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE
94
95 /* Wireless */
96 #define ASUS_WMI_DEVID_HW_SWITCH 0x00010001
97 #define ASUS_WMI_DEVID_WIRELESS_LED 0x00010002
98 #define ASUS_WMI_DEVID_WLAN 0x00010011
99 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013
100 #define ASUS_WMI_DEVID_GPS 0x00010015
101 #define ASUS_WMI_DEVID_WIMAX 0x00010017
102 #define ASUS_WMI_DEVID_WWAN3G 0x00010019
103 #define ASUS_WMI_DEVID_UWB 0x00010021
104
105 /* Leds */
106 /* 0x000200XX and 0x000400XX */
107
108 /* Backlight and Brightness */
109 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
110 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
111 #define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021
112 #define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */
113
114 /* Misc */
115 #define ASUS_WMI_DEVID_CAMERA 0x00060013
116
117 /* Storage */
118 #define ASUS_WMI_DEVID_CARDREADER 0x00080013
119
120 /* Input */
121 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
122 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
123
124 /* Fan, Thermal */
125 #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011
126 #define ASUS_WMI_DEVID_FAN_CTRL 0x00110012
127
128 /* Power */
129 #define ASUS_WMI_DEVID_PROCESSOR_STATE 0x00120012
130
131 /* DSTS masks */
132 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
133 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
134 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000
135 #define ASUS_WMI_DSTS_USER_BIT 0x00020000
136 #define ASUS_WMI_DSTS_BIOS_BIT 0x00040000
137 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
138 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
139
140 struct bios_args {
141 u32 arg0;
142 u32 arg1;
143 } __packed;
144
145 /*
146 * <platform>/ - debugfs root directory
147 * dev_id - current dev_id
148 * ctrl_param - current ctrl_param
149 * method_id - current method_id
150 * devs - call DEVS(dev_id, ctrl_param) and print result
151 * dsts - call DSTS(dev_id) and print result
152 * call - call method_id(dev_id, ctrl_param) and print result
153 */
154 struct asus_wmi_debug {
155 struct dentry *root;
156 u32 method_id;
157 u32 dev_id;
158 u32 ctrl_param;
159 };
160
161 struct asus_rfkill {
162 struct asus_wmi *asus;
163 struct rfkill *rfkill;
164 u32 dev_id;
165 };
166
167 struct asus_wmi {
168 int dsts_id;
169 int spec;
170 int sfun;
171
172 struct input_dev *inputdev;
173 struct backlight_device *backlight_device;
174 struct device *hwmon_device;
175 struct platform_device *platform_device;
176
177 struct led_classdev tpd_led;
178 int tpd_led_wk;
179 struct led_classdev kbd_led;
180 int kbd_led_wk;
181 struct workqueue_struct *led_workqueue;
182 struct work_struct tpd_led_work;
183 struct work_struct kbd_led_work;
184
185 struct asus_rfkill wlan;
186 struct asus_rfkill bluetooth;
187 struct asus_rfkill wimax;
188 struct asus_rfkill wwan3g;
189
190 struct hotplug_slot *hotplug_slot;
191 struct mutex hotplug_lock;
192 struct mutex wmi_lock;
193 struct workqueue_struct *hotplug_workqueue;
194 struct work_struct hotplug_work;
195
196 struct asus_wmi_debug debug;
197
198 struct asus_wmi_driver *driver;
199 };
200
201 static int asus_wmi_input_init(struct asus_wmi *asus)
202 {
203 int err;
204
205 asus->inputdev = input_allocate_device();
206 if (!asus->inputdev)
207 return -ENOMEM;
208
209 asus->inputdev->name = asus->driver->input_name;
210 asus->inputdev->phys = asus->driver->input_phys;
211 asus->inputdev->id.bustype = BUS_HOST;
212 asus->inputdev->dev.parent = &asus->platform_device->dev;
213 set_bit(EV_REP, asus->inputdev->evbit);
214
215 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
216 if (err)
217 goto err_free_dev;
218
219 err = input_register_device(asus->inputdev);
220 if (err)
221 goto err_free_keymap;
222
223 return 0;
224
225 err_free_keymap:
226 sparse_keymap_free(asus->inputdev);
227 err_free_dev:
228 input_free_device(asus->inputdev);
229 return err;
230 }
231
232 static void asus_wmi_input_exit(struct asus_wmi *asus)
233 {
234 if (asus->inputdev) {
235 sparse_keymap_free(asus->inputdev);
236 input_unregister_device(asus->inputdev);
237 }
238
239 asus->inputdev = NULL;
240 }
241
242 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
243 u32 *retval)
244 {
245 struct bios_args args = {
246 .arg0 = arg0,
247 .arg1 = arg1,
248 };
249 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
250 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
251 acpi_status status;
252 union acpi_object *obj;
253 u32 tmp;
254
255 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
256 &input, &output);
257
258 if (ACPI_FAILURE(status))
259 goto exit;
260
261 obj = (union acpi_object *)output.pointer;
262 if (obj && obj->type == ACPI_TYPE_INTEGER)
263 tmp = (u32) obj->integer.value;
264 else
265 tmp = 0;
266
267 if (retval)
268 *retval = tmp;
269
270 kfree(obj);
271
272 exit:
273 if (ACPI_FAILURE(status))
274 return -EIO;
275
276 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
277 return -ENODEV;
278
279 return 0;
280 }
281
282 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
283 {
284 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
285 }
286
287 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
288 u32 *retval)
289 {
290 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
291 ctrl_param, retval);
292 }
293
294 /* Helper for special devices with magic return codes */
295 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
296 u32 dev_id, u32 mask)
297 {
298 u32 retval = 0;
299 int err;
300
301 err = asus_wmi_get_devstate(asus, dev_id, &retval);
302
303 if (err < 0)
304 return err;
305
306 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
307 return -ENODEV;
308
309 if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
310 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
311 return -ENODEV;
312 }
313
314 return retval & mask;
315 }
316
317 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
318 {
319 return asus_wmi_get_devstate_bits(asus, dev_id,
320 ASUS_WMI_DSTS_STATUS_BIT);
321 }
322
323 /*
324 * LEDs
325 */
326 /*
327 * These functions actually update the LED's, and are called from a
328 * workqueue. By doing this as separate work rather than when the LED
329 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
330 * potentially bad time, such as a timer interrupt.
331 */
332 static void tpd_led_update(struct work_struct *work)
333 {
334 int ctrl_param;
335 struct asus_wmi *asus;
336
337 asus = container_of(work, struct asus_wmi, tpd_led_work);
338
339 ctrl_param = asus->tpd_led_wk;
340 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
341 }
342
343 static void tpd_led_set(struct led_classdev *led_cdev,
344 enum led_brightness value)
345 {
346 struct asus_wmi *asus;
347
348 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
349
350 asus->tpd_led_wk = !!value;
351 queue_work(asus->led_workqueue, &asus->tpd_led_work);
352 }
353
354 static int read_tpd_led_state(struct asus_wmi *asus)
355 {
356 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
357 }
358
359 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
360 {
361 struct asus_wmi *asus;
362
363 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
364
365 return read_tpd_led_state(asus);
366 }
367
368 static void kbd_led_update(struct work_struct *work)
369 {
370 int ctrl_param = 0;
371 struct asus_wmi *asus;
372
373 asus = container_of(work, struct asus_wmi, kbd_led_work);
374
375 /*
376 * bits 0-2: level
377 * bit 7: light on/off
378 */
379 if (asus->kbd_led_wk > 0)
380 ctrl_param = 0x80 | (asus->kbd_led_wk & 0x7F);
381
382 asus_wmi_set_devstate(ASUS_WMI_DEVID_KBD_BACKLIGHT, ctrl_param, NULL);
383 }
384
385 static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
386 {
387 int retval;
388
389 /*
390 * bits 0-2: level
391 * bit 7: light on/off
392 * bit 8-10: environment (0: dark, 1: normal, 2: light)
393 * bit 17: status unknown
394 */
395 retval = asus_wmi_get_devstate_bits(asus, ASUS_WMI_DEVID_KBD_BACKLIGHT,
396 0xFFFF);
397
398 /* Unknown status is considered as off */
399 if (retval == 0x8000)
400 retval = 0;
401
402 if (retval >= 0) {
403 if (level)
404 *level = retval & 0x80 ? retval & 0x7F : 0;
405 if (env)
406 *env = (retval >> 8) & 0x7F;
407 retval = 0;
408 }
409
410 return retval;
411 }
412
413 static void kbd_led_set(struct led_classdev *led_cdev,
414 enum led_brightness value)
415 {
416 struct asus_wmi *asus;
417
418 asus = container_of(led_cdev, struct asus_wmi, kbd_led);
419
420 if (value > asus->kbd_led.max_brightness)
421 value = asus->kbd_led.max_brightness;
422 else if (value < 0)
423 value = 0;
424
425 asus->kbd_led_wk = value;
426 queue_work(asus->led_workqueue, &asus->kbd_led_work);
427 }
428
429 static enum led_brightness kbd_led_get(struct led_classdev *led_cdev)
430 {
431 struct asus_wmi *asus;
432 int retval, value;
433
434 asus = container_of(led_cdev, struct asus_wmi, kbd_led);
435
436 retval = kbd_led_read(asus, &value, NULL);
437
438 if (retval < 0)
439 return retval;
440
441 return value;
442 }
443
444 static void asus_wmi_led_exit(struct asus_wmi *asus)
445 {
446 if (asus->tpd_led.dev)
447 led_classdev_unregister(&asus->tpd_led);
448 if (asus->led_workqueue)
449 destroy_workqueue(asus->led_workqueue);
450 }
451
452 static int asus_wmi_led_init(struct asus_wmi *asus)
453 {
454 int rv = 0;
455
456 asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
457 if (!asus->led_workqueue)
458 return -ENOMEM;
459
460 if (read_tpd_led_state(asus) >= 0) {
461 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
462
463 asus->tpd_led.name = "asus::touchpad";
464 asus->tpd_led.brightness_set = tpd_led_set;
465 asus->tpd_led.brightness_get = tpd_led_get;
466 asus->tpd_led.max_brightness = 1;
467
468 rv = led_classdev_register(&asus->platform_device->dev,
469 &asus->tpd_led);
470 if (rv)
471 goto error;
472 }
473
474 if (kbd_led_read(asus, NULL, NULL) >= 0) {
475 INIT_WORK(&asus->kbd_led_work, kbd_led_update);
476
477 asus->kbd_led.name = "asus::kbd_backlight";
478 asus->kbd_led.brightness_set = kbd_led_set;
479 asus->kbd_led.brightness_get = kbd_led_get;
480 asus->kbd_led.max_brightness = 3;
481
482 rv = led_classdev_register(&asus->platform_device->dev,
483 &asus->kbd_led);
484 }
485
486 error:
487 if (rv)
488 asus_wmi_led_exit(asus);
489
490 return rv;
491 }
492
493
494 /*
495 * PCI hotplug (for wlan rfkill)
496 */
497 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
498 {
499 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
500
501 if (result < 0)
502 return false;
503 return !result;
504 }
505
506 static void asus_rfkill_hotplug(struct asus_wmi *asus)
507 {
508 struct pci_dev *dev;
509 struct pci_bus *bus;
510 bool blocked;
511 bool absent;
512 u32 l;
513
514 mutex_lock(&asus->wmi_lock);
515 blocked = asus_wlan_rfkill_blocked(asus);
516 mutex_unlock(&asus->wmi_lock);
517
518 mutex_lock(&asus->hotplug_lock);
519
520 if (asus->wlan.rfkill)
521 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
522
523 if (asus->hotplug_slot) {
524 bus = pci_find_bus(0, 1);
525 if (!bus) {
526 pr_warn("Unable to find PCI bus 1?\n");
527 goto out_unlock;
528 }
529
530 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
531 pr_err("Unable to read PCI config space?\n");
532 goto out_unlock;
533 }
534 absent = (l == 0xffffffff);
535
536 if (blocked != absent) {
537 pr_warn("BIOS says wireless lan is %s, "
538 "but the pci device is %s\n",
539 blocked ? "blocked" : "unblocked",
540 absent ? "absent" : "present");
541 pr_warn("skipped wireless hotplug as probably "
542 "inappropriate for this model\n");
543 goto out_unlock;
544 }
545
546 if (!blocked) {
547 dev = pci_get_slot(bus, 0);
548 if (dev) {
549 /* Device already present */
550 pci_dev_put(dev);
551 goto out_unlock;
552 }
553 dev = pci_scan_single_device(bus, 0);
554 if (dev) {
555 pci_bus_assign_resources(bus);
556 if (pci_bus_add_device(dev))
557 pr_err("Unable to hotplug wifi\n");
558 }
559 } else {
560 dev = pci_get_slot(bus, 0);
561 if (dev) {
562 pci_remove_bus_device(dev);
563 pci_dev_put(dev);
564 }
565 }
566 }
567
568 out_unlock:
569 mutex_unlock(&asus->hotplug_lock);
570 }
571
572 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
573 {
574 struct asus_wmi *asus = data;
575
576 if (event != ACPI_NOTIFY_BUS_CHECK)
577 return;
578
579 /*
580 * We can't call directly asus_rfkill_hotplug because most
581 * of the time WMBC is still being executed and not reetrant.
582 * There is currently no way to tell ACPICA that we want this
583 * method to be serialized, we schedule a asus_rfkill_hotplug
584 * call later, in a safer context.
585 */
586 queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
587 }
588
589 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
590 {
591 acpi_status status;
592 acpi_handle handle;
593
594 status = acpi_get_handle(NULL, node, &handle);
595
596 if (ACPI_SUCCESS(status)) {
597 status = acpi_install_notify_handler(handle,
598 ACPI_SYSTEM_NOTIFY,
599 asus_rfkill_notify, asus);
600 if (ACPI_FAILURE(status))
601 pr_warn("Failed to register notify on %s\n", node);
602 } else
603 return -ENODEV;
604
605 return 0;
606 }
607
608 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
609 {
610 acpi_status status = AE_OK;
611 acpi_handle handle;
612
613 status = acpi_get_handle(NULL, node, &handle);
614
615 if (ACPI_SUCCESS(status)) {
616 status = acpi_remove_notify_handler(handle,
617 ACPI_SYSTEM_NOTIFY,
618 asus_rfkill_notify);
619 if (ACPI_FAILURE(status))
620 pr_err("Error removing rfkill notify handler %s\n",
621 node);
622 }
623 }
624
625 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
626 u8 *value)
627 {
628 struct asus_wmi *asus = hotplug_slot->private;
629 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
630
631 if (result < 0)
632 return result;
633
634 *value = !!result;
635 return 0;
636 }
637
638 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
639 {
640 kfree(hotplug_slot->info);
641 kfree(hotplug_slot);
642 }
643
644 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
645 .owner = THIS_MODULE,
646 .get_adapter_status = asus_get_adapter_status,
647 .get_power_status = asus_get_adapter_status,
648 };
649
650 static void asus_hotplug_work(struct work_struct *work)
651 {
652 struct asus_wmi *asus;
653
654 asus = container_of(work, struct asus_wmi, hotplug_work);
655 asus_rfkill_hotplug(asus);
656 }
657
658 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
659 {
660 int ret = -ENOMEM;
661 struct pci_bus *bus = pci_find_bus(0, 1);
662
663 if (!bus) {
664 pr_err("Unable to find wifi PCI bus\n");
665 return -ENODEV;
666 }
667
668 asus->hotplug_workqueue =
669 create_singlethread_workqueue("hotplug_workqueue");
670 if (!asus->hotplug_workqueue)
671 goto error_workqueue;
672
673 INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
674
675 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
676 if (!asus->hotplug_slot)
677 goto error_slot;
678
679 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
680 GFP_KERNEL);
681 if (!asus->hotplug_slot->info)
682 goto error_info;
683
684 asus->hotplug_slot->private = asus;
685 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
686 asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
687 asus_get_adapter_status(asus->hotplug_slot,
688 &asus->hotplug_slot->info->adapter_status);
689
690 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
691 if (ret) {
692 pr_err("Unable to register hotplug slot - %d\n", ret);
693 goto error_register;
694 }
695
696 return 0;
697
698 error_register:
699 kfree(asus->hotplug_slot->info);
700 error_info:
701 kfree(asus->hotplug_slot);
702 asus->hotplug_slot = NULL;
703 error_slot:
704 destroy_workqueue(asus->hotplug_workqueue);
705 error_workqueue:
706 return ret;
707 }
708
709 /*
710 * Rfkill devices
711 */
712 static int asus_rfkill_set(void *data, bool blocked)
713 {
714 struct asus_rfkill *priv = data;
715 u32 ctrl_param = !blocked;
716
717 return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL);
718 }
719
720 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
721 {
722 struct asus_rfkill *priv = data;
723 int result;
724
725 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
726
727 if (result < 0)
728 return;
729
730 rfkill_set_sw_state(priv->rfkill, !result);
731 }
732
733 static int asus_rfkill_wlan_set(void *data, bool blocked)
734 {
735 struct asus_rfkill *priv = data;
736 struct asus_wmi *asus = priv->asus;
737 int ret;
738
739 /*
740 * This handler is enabled only if hotplug is enabled.
741 * In this case, the asus_wmi_set_devstate() will
742 * trigger a wmi notification and we need to wait
743 * this call to finish before being able to call
744 * any wmi method
745 */
746 mutex_lock(&asus->wmi_lock);
747 ret = asus_rfkill_set(data, blocked);
748 mutex_unlock(&asus->wmi_lock);
749 return ret;
750 }
751
752 static const struct rfkill_ops asus_rfkill_wlan_ops = {
753 .set_block = asus_rfkill_wlan_set,
754 .query = asus_rfkill_query,
755 };
756
757 static const struct rfkill_ops asus_rfkill_ops = {
758 .set_block = asus_rfkill_set,
759 .query = asus_rfkill_query,
760 };
761
762 static int asus_new_rfkill(struct asus_wmi *asus,
763 struct asus_rfkill *arfkill,
764 const char *name, enum rfkill_type type, int dev_id)
765 {
766 int result = asus_wmi_get_devstate_simple(asus, dev_id);
767 struct rfkill **rfkill = &arfkill->rfkill;
768
769 if (result < 0)
770 return result;
771
772 arfkill->dev_id = dev_id;
773 arfkill->asus = asus;
774
775 if (dev_id == ASUS_WMI_DEVID_WLAN && asus->driver->hotplug_wireless)
776 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
777 &asus_rfkill_wlan_ops, arfkill);
778 else
779 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
780 &asus_rfkill_ops, arfkill);
781
782 if (!*rfkill)
783 return -EINVAL;
784
785 rfkill_init_sw_state(*rfkill, !result);
786 result = rfkill_register(*rfkill);
787 if (result) {
788 rfkill_destroy(*rfkill);
789 *rfkill = NULL;
790 return result;
791 }
792 return 0;
793 }
794
795 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
796 {
797 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
798 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
799 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
800 if (asus->wlan.rfkill) {
801 rfkill_unregister(asus->wlan.rfkill);
802 rfkill_destroy(asus->wlan.rfkill);
803 asus->wlan.rfkill = NULL;
804 }
805 /*
806 * Refresh pci hotplug in case the rfkill state was changed after
807 * asus_unregister_rfkill_notifier()
808 */
809 asus_rfkill_hotplug(asus);
810 if (asus->hotplug_slot)
811 pci_hp_deregister(asus->hotplug_slot);
812 if (asus->hotplug_workqueue)
813 destroy_workqueue(asus->hotplug_workqueue);
814
815 if (asus->bluetooth.rfkill) {
816 rfkill_unregister(asus->bluetooth.rfkill);
817 rfkill_destroy(asus->bluetooth.rfkill);
818 asus->bluetooth.rfkill = NULL;
819 }
820 if (asus->wimax.rfkill) {
821 rfkill_unregister(asus->wimax.rfkill);
822 rfkill_destroy(asus->wimax.rfkill);
823 asus->wimax.rfkill = NULL;
824 }
825 if (asus->wwan3g.rfkill) {
826 rfkill_unregister(asus->wwan3g.rfkill);
827 rfkill_destroy(asus->wwan3g.rfkill);
828 asus->wwan3g.rfkill = NULL;
829 }
830 }
831
832 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
833 {
834 int result = 0;
835
836 mutex_init(&asus->hotplug_lock);
837 mutex_init(&asus->wmi_lock);
838
839 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
840 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
841
842 if (result && result != -ENODEV)
843 goto exit;
844
845 result = asus_new_rfkill(asus, &asus->bluetooth,
846 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
847 ASUS_WMI_DEVID_BLUETOOTH);
848
849 if (result && result != -ENODEV)
850 goto exit;
851
852 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
853 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
854
855 if (result && result != -ENODEV)
856 goto exit;
857
858 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
859 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
860
861 if (result && result != -ENODEV)
862 goto exit;
863
864 if (!asus->driver->hotplug_wireless)
865 goto exit;
866
867 result = asus_setup_pci_hotplug(asus);
868 /*
869 * If we get -EBUSY then something else is handling the PCI hotplug -
870 * don't fail in this case
871 */
872 if (result == -EBUSY)
873 result = 0;
874
875 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
876 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
877 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
878 /*
879 * Refresh pci hotplug in case the rfkill state was changed during
880 * setup.
881 */
882 asus_rfkill_hotplug(asus);
883
884 exit:
885 if (result && result != -ENODEV)
886 asus_wmi_rfkill_exit(asus);
887
888 if (result == -ENODEV)
889 result = 0;
890
891 return result;
892 }
893
894 /*
895 * Hwmon device
896 */
897 static ssize_t asus_hwmon_pwm1(struct device *dev,
898 struct device_attribute *attr,
899 char *buf)
900 {
901 struct asus_wmi *asus = dev_get_drvdata(dev);
902 u32 value;
903 int err;
904
905 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_FAN_CTRL, &value);
906
907 if (err < 0)
908 return err;
909
910 value &= 0xFF;
911
912 if (value == 1) /* Low Speed */
913 value = 85;
914 else if (value == 2)
915 value = 170;
916 else if (value == 3)
917 value = 255;
918 else if (value != 0) {
919 pr_err("Unknown fan speed %#x", value);
920 value = -1;
921 }
922
923 return sprintf(buf, "%d\n", value);
924 }
925
926 static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO, asus_hwmon_pwm1, NULL, 0);
927
928 static ssize_t
929 show_name(struct device *dev, struct device_attribute *attr, char *buf)
930 {
931 return sprintf(buf, "asus\n");
932 }
933 static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
934
935 static struct attribute *hwmon_attributes[] = {
936 &sensor_dev_attr_pwm1.dev_attr.attr,
937 &sensor_dev_attr_name.dev_attr.attr,
938 NULL
939 };
940
941 static mode_t asus_hwmon_sysfs_is_visible(struct kobject *kobj,
942 struct attribute *attr, int idx)
943 {
944 struct device *dev = container_of(kobj, struct device, kobj);
945 struct platform_device *pdev = to_platform_device(dev->parent);
946 struct asus_wmi *asus = platform_get_drvdata(pdev);
947 bool ok = true;
948 int dev_id = -1;
949 u32 value = ASUS_WMI_UNSUPPORTED_METHOD;
950
951 if (attr == &sensor_dev_attr_pwm1.dev_attr.attr)
952 dev_id = ASUS_WMI_DEVID_FAN_CTRL;
953
954 if (dev_id != -1) {
955 int err = asus_wmi_get_devstate(asus, dev_id, &value);
956
957 if (err < 0)
958 return 0; /* can't return negative here */
959 }
960
961 if (dev_id == ASUS_WMI_DEVID_FAN_CTRL) {
962 /*
963 * We need to find a better way, probably using sfun,
964 * bits or spec ...
965 * Currently we disable it if:
966 * - ASUS_WMI_UNSUPPORTED_METHOD is returned
967 * - reverved bits are non-zero
968 * - sfun and presence bit are not set
969 */
970 if (value == ASUS_WMI_UNSUPPORTED_METHOD || value & 0xFFF80000
971 || (!asus->sfun && !(value & ASUS_WMI_DSTS_PRESENCE_BIT)))
972 ok = false;
973 }
974
975 return ok ? attr->mode : 0;
976 }
977
978 static struct attribute_group hwmon_attribute_group = {
979 .is_visible = asus_hwmon_sysfs_is_visible,
980 .attrs = hwmon_attributes
981 };
982
983 static void asus_wmi_hwmon_exit(struct asus_wmi *asus)
984 {
985 struct device *hwmon;
986
987 hwmon = asus->hwmon_device;
988 if (!hwmon)
989 return;
990 sysfs_remove_group(&hwmon->kobj, &hwmon_attribute_group);
991 hwmon_device_unregister(hwmon);
992 asus->hwmon_device = NULL;
993 }
994
995 static int asus_wmi_hwmon_init(struct asus_wmi *asus)
996 {
997 struct device *hwmon;
998 int result;
999
1000 hwmon = hwmon_device_register(&asus->platform_device->dev);
1001 if (IS_ERR(hwmon)) {
1002 pr_err("Could not register asus hwmon device\n");
1003 return PTR_ERR(hwmon);
1004 }
1005 dev_set_drvdata(hwmon, asus);
1006 asus->hwmon_device = hwmon;
1007 result = sysfs_create_group(&hwmon->kobj, &hwmon_attribute_group);
1008 if (result)
1009 asus_wmi_hwmon_exit(asus);
1010 return result;
1011 }
1012
1013 /*
1014 * Backlight
1015 */
1016 static int read_backlight_power(struct asus_wmi *asus)
1017 {
1018 int ret = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_BACKLIGHT);
1019
1020 if (ret < 0)
1021 return ret;
1022
1023 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
1024 }
1025
1026 static int read_brightness_max(struct asus_wmi *asus)
1027 {
1028 u32 retval;
1029 int err;
1030
1031 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1032
1033 if (err < 0)
1034 return err;
1035
1036 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
1037 retval >>= 8;
1038
1039 if (!retval)
1040 return -ENODEV;
1041
1042 return retval;
1043 }
1044
1045 static int read_brightness(struct backlight_device *bd)
1046 {
1047 struct asus_wmi *asus = bl_get_data(bd);
1048 u32 retval;
1049 int err;
1050
1051 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
1052
1053 if (err < 0)
1054 return err;
1055
1056 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
1057 }
1058
1059 static int update_bl_status(struct backlight_device *bd)
1060 {
1061 struct asus_wmi *asus = bl_get_data(bd);
1062 u32 ctrl_param;
1063 int power, err;
1064
1065 ctrl_param = bd->props.brightness;
1066
1067 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
1068 ctrl_param, NULL);
1069
1070 if (err < 0)
1071 return err;
1072
1073 power = read_backlight_power(asus);
1074 if (power != -ENODEV && bd->props.power != power) {
1075 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
1076 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
1077 ctrl_param, NULL);
1078 }
1079 return err;
1080 }
1081
1082 static const struct backlight_ops asus_wmi_bl_ops = {
1083 .get_brightness = read_brightness,
1084 .update_status = update_bl_status,
1085 };
1086
1087 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
1088 {
1089 struct backlight_device *bd = asus->backlight_device;
1090 int old = bd->props.brightness;
1091 int new = old;
1092
1093 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1094 new = code - NOTIFY_BRNUP_MIN + 1;
1095 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
1096 new = code - NOTIFY_BRNDOWN_MIN;
1097
1098 bd->props.brightness = new;
1099 backlight_update_status(bd);
1100 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
1101
1102 return old;
1103 }
1104
1105 static int asus_wmi_backlight_init(struct asus_wmi *asus)
1106 {
1107 struct backlight_device *bd;
1108 struct backlight_properties props;
1109 int max;
1110 int power;
1111
1112 max = read_brightness_max(asus);
1113
1114 if (max == -ENODEV)
1115 max = 0;
1116 else if (max < 0)
1117 return max;
1118
1119 power = read_backlight_power(asus);
1120
1121 if (power == -ENODEV)
1122 power = FB_BLANK_UNBLANK;
1123 else if (power < 0)
1124 return power;
1125
1126 memset(&props, 0, sizeof(struct backlight_properties));
1127 props.type = BACKLIGHT_PLATFORM;
1128 props.max_brightness = max;
1129 bd = backlight_device_register(asus->driver->name,
1130 &asus->platform_device->dev, asus,
1131 &asus_wmi_bl_ops, &props);
1132 if (IS_ERR(bd)) {
1133 pr_err("Could not register backlight device\n");
1134 return PTR_ERR(bd);
1135 }
1136
1137 asus->backlight_device = bd;
1138
1139 bd->props.brightness = read_brightness(bd);
1140 bd->props.power = power;
1141 backlight_update_status(bd);
1142
1143 return 0;
1144 }
1145
1146 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
1147 {
1148 if (asus->backlight_device)
1149 backlight_device_unregister(asus->backlight_device);
1150
1151 asus->backlight_device = NULL;
1152 }
1153
1154 static void asus_wmi_notify(u32 value, void *context)
1155 {
1156 struct asus_wmi *asus = context;
1157 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
1158 union acpi_object *obj;
1159 acpi_status status;
1160 int code;
1161 int orig_code;
1162 unsigned int key_value = 1;
1163 bool autorelease = 1;
1164
1165 status = wmi_get_event_data(value, &response);
1166 if (status != AE_OK) {
1167 pr_err("bad event status 0x%x\n", status);
1168 return;
1169 }
1170
1171 obj = (union acpi_object *)response.pointer;
1172
1173 if (!obj || obj->type != ACPI_TYPE_INTEGER)
1174 goto exit;
1175
1176 code = obj->integer.value;
1177 orig_code = code;
1178
1179 if (asus->driver->key_filter) {
1180 asus->driver->key_filter(asus->driver, &code, &key_value,
1181 &autorelease);
1182 if (code == ASUS_WMI_KEY_IGNORE)
1183 goto exit;
1184 }
1185
1186 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
1187 code = NOTIFY_BRNUP_MIN;
1188 else if (code >= NOTIFY_BRNDOWN_MIN &&
1189 code <= NOTIFY_BRNDOWN_MAX)
1190 code = NOTIFY_BRNDOWN_MIN;
1191
1192 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
1193 if (!acpi_video_backlight_support())
1194 asus_wmi_backlight_notify(asus, orig_code);
1195 } else if (!sparse_keymap_report_event(asus->inputdev, code,
1196 key_value, autorelease))
1197 pr_info("Unknown key %x pressed\n", code);
1198
1199 exit:
1200 kfree(obj);
1201 }
1202
1203 /*
1204 * Sys helpers
1205 */
1206 static int parse_arg(const char *buf, unsigned long count, int *val)
1207 {
1208 if (!count)
1209 return 0;
1210 if (sscanf(buf, "%i", val) != 1)
1211 return -EINVAL;
1212 return count;
1213 }
1214
1215 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
1216 const char *buf, size_t count)
1217 {
1218 u32 retval;
1219 int rv, err, value;
1220
1221 value = asus_wmi_get_devstate_simple(asus, devid);
1222 if (value == -ENODEV) /* Check device presence */
1223 return value;
1224
1225 rv = parse_arg(buf, count, &value);
1226 err = asus_wmi_set_devstate(devid, value, &retval);
1227
1228 if (err < 0)
1229 return err;
1230
1231 return rv;
1232 }
1233
1234 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1235 {
1236 int value = asus_wmi_get_devstate_simple(asus, devid);
1237
1238 if (value < 0)
1239 return value;
1240
1241 return sprintf(buf, "%d\n", value);
1242 }
1243
1244 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
1245 static ssize_t show_##_name(struct device *dev, \
1246 struct device_attribute *attr, \
1247 char *buf) \
1248 { \
1249 struct asus_wmi *asus = dev_get_drvdata(dev); \
1250 \
1251 return show_sys_wmi(asus, _cm, buf); \
1252 } \
1253 static ssize_t store_##_name(struct device *dev, \
1254 struct device_attribute *attr, \
1255 const char *buf, size_t count) \
1256 { \
1257 struct asus_wmi *asus = dev_get_drvdata(dev); \
1258 \
1259 return store_sys_wmi(asus, _cm, buf, count); \
1260 } \
1261 static struct device_attribute dev_attr_##_name = { \
1262 .attr = { \
1263 .name = __stringify(_name), \
1264 .mode = _mode }, \
1265 .show = show_##_name, \
1266 .store = store_##_name, \
1267 }
1268
1269 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1270 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1271 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1272
1273 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1274 const char *buf, size_t count)
1275 {
1276 int value;
1277
1278 if (!count || sscanf(buf, "%i", &value) != 1)
1279 return -EINVAL;
1280 if (value < 0 || value > 2)
1281 return -EINVAL;
1282
1283 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1284 }
1285
1286 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1287
1288 static struct attribute *platform_attributes[] = {
1289 &dev_attr_cpufv.attr,
1290 &dev_attr_camera.attr,
1291 &dev_attr_cardr.attr,
1292 &dev_attr_touchpad.attr,
1293 NULL
1294 };
1295
1296 static mode_t asus_sysfs_is_visible(struct kobject *kobj,
1297 struct attribute *attr, int idx)
1298 {
1299 struct device *dev = container_of(kobj, struct device, kobj);
1300 struct platform_device *pdev = to_platform_device(dev);
1301 struct asus_wmi *asus = platform_get_drvdata(pdev);
1302 bool ok = true;
1303 int devid = -1;
1304
1305 if (attr == &dev_attr_camera.attr)
1306 devid = ASUS_WMI_DEVID_CAMERA;
1307 else if (attr == &dev_attr_cardr.attr)
1308 devid = ASUS_WMI_DEVID_CARDREADER;
1309 else if (attr == &dev_attr_touchpad.attr)
1310 devid = ASUS_WMI_DEVID_TOUCHPAD;
1311
1312 if (devid != -1)
1313 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1314
1315 return ok ? attr->mode : 0;
1316 }
1317
1318 static struct attribute_group platform_attribute_group = {
1319 .is_visible = asus_sysfs_is_visible,
1320 .attrs = platform_attributes
1321 };
1322
1323 static void asus_wmi_sysfs_exit(struct platform_device *device)
1324 {
1325 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1326 }
1327
1328 static int asus_wmi_sysfs_init(struct platform_device *device)
1329 {
1330 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1331 }
1332
1333 /*
1334 * Platform device
1335 */
1336 static int asus_wmi_platform_init(struct asus_wmi *asus)
1337 {
1338 int rv;
1339
1340 /* INIT enable hotkeys on some models */
1341 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1342 pr_info("Initialization: %#x", rv);
1343
1344 /* We don't know yet what to do with this version... */
1345 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1346 pr_info("BIOS WMI version: %d.%d", rv >> 16, rv & 0xFF);
1347 asus->spec = rv;
1348 }
1349
1350 /*
1351 * The SFUN method probably allows the original driver to get the list
1352 * of features supported by a given model. For now, 0x0100 or 0x0800
1353 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1354 * The significance of others is yet to be found.
1355 */
1356 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1357 pr_info("SFUN value: %#x", rv);
1358 asus->sfun = rv;
1359 }
1360
1361 /*
1362 * Eee PC and Notebooks seems to have different method_id for DSTS,
1363 * but it may also be related to the BIOS's SPEC.
1364 * Note, on most Eeepc, there is no way to check if a method exist
1365 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1366 * but once again, SPEC may probably be used for that kind of things.
1367 */
1368 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1369 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1370 else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
1371 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1372
1373 if (!asus->dsts_id) {
1374 pr_err("Can't find DSTS");
1375 return -ENODEV;
1376 }
1377
1378 return asus_wmi_sysfs_init(asus->platform_device);
1379 }
1380
1381 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1382 {
1383 asus_wmi_sysfs_exit(asus->platform_device);
1384 }
1385
1386 /*
1387 * debugfs
1388 */
1389 struct asus_wmi_debugfs_node {
1390 struct asus_wmi *asus;
1391 char *name;
1392 int (*show) (struct seq_file *m, void *data);
1393 };
1394
1395 static int show_dsts(struct seq_file *m, void *data)
1396 {
1397 struct asus_wmi *asus = m->private;
1398 int err;
1399 u32 retval = -1;
1400
1401 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1402
1403 if (err < 0)
1404 return err;
1405
1406 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1407
1408 return 0;
1409 }
1410
1411 static int show_devs(struct seq_file *m, void *data)
1412 {
1413 struct asus_wmi *asus = m->private;
1414 int err;
1415 u32 retval = -1;
1416
1417 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1418 &retval);
1419
1420 if (err < 0)
1421 return err;
1422
1423 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1424 asus->debug.ctrl_param, retval);
1425
1426 return 0;
1427 }
1428
1429 static int show_call(struct seq_file *m, void *data)
1430 {
1431 struct asus_wmi *asus = m->private;
1432 struct bios_args args = {
1433 .arg0 = asus->debug.dev_id,
1434 .arg1 = asus->debug.ctrl_param,
1435 };
1436 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1437 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1438 union acpi_object *obj;
1439 acpi_status status;
1440
1441 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1442 1, asus->debug.method_id,
1443 &input, &output);
1444
1445 if (ACPI_FAILURE(status))
1446 return -EIO;
1447
1448 obj = (union acpi_object *)output.pointer;
1449 if (obj && obj->type == ACPI_TYPE_INTEGER)
1450 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1451 asus->debug.dev_id, asus->debug.ctrl_param,
1452 (u32) obj->integer.value);
1453 else
1454 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1455 asus->debug.dev_id, asus->debug.ctrl_param,
1456 obj ? obj->type : -1);
1457
1458 kfree(obj);
1459
1460 return 0;
1461 }
1462
1463 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1464 {NULL, "devs", show_devs},
1465 {NULL, "dsts", show_dsts},
1466 {NULL, "call", show_call},
1467 };
1468
1469 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1470 {
1471 struct asus_wmi_debugfs_node *node = inode->i_private;
1472
1473 return single_open(file, node->show, node->asus);
1474 }
1475
1476 static const struct file_operations asus_wmi_debugfs_io_ops = {
1477 .owner = THIS_MODULE,
1478 .open = asus_wmi_debugfs_open,
1479 .read = seq_read,
1480 .llseek = seq_lseek,
1481 .release = single_release,
1482 };
1483
1484 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1485 {
1486 debugfs_remove_recursive(asus->debug.root);
1487 }
1488
1489 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1490 {
1491 struct dentry *dent;
1492 int i;
1493
1494 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1495 if (!asus->debug.root) {
1496 pr_err("failed to create debugfs directory");
1497 goto error_debugfs;
1498 }
1499
1500 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1501 asus->debug.root, &asus->debug.method_id);
1502 if (!dent)
1503 goto error_debugfs;
1504
1505 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1506 asus->debug.root, &asus->debug.dev_id);
1507 if (!dent)
1508 goto error_debugfs;
1509
1510 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1511 asus->debug.root, &asus->debug.ctrl_param);
1512 if (!dent)
1513 goto error_debugfs;
1514
1515 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1516 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1517
1518 node->asus = asus;
1519 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1520 asus->debug.root, node,
1521 &asus_wmi_debugfs_io_ops);
1522 if (!dent) {
1523 pr_err("failed to create debug file: %s\n", node->name);
1524 goto error_debugfs;
1525 }
1526 }
1527
1528 return 0;
1529
1530 error_debugfs:
1531 asus_wmi_debugfs_exit(asus);
1532 return -ENOMEM;
1533 }
1534
1535 /*
1536 * WMI Driver
1537 */
1538 static int asus_wmi_add(struct platform_device *pdev)
1539 {
1540 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1541 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1542 struct asus_wmi *asus;
1543 acpi_status status;
1544 int err;
1545
1546 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1547 if (!asus)
1548 return -ENOMEM;
1549
1550 asus->driver = wdrv;
1551 asus->platform_device = pdev;
1552 wdrv->platform_device = pdev;
1553 platform_set_drvdata(asus->platform_device, asus);
1554
1555 if (wdrv->quirks)
1556 wdrv->quirks(asus->driver);
1557
1558 err = asus_wmi_platform_init(asus);
1559 if (err)
1560 goto fail_platform;
1561
1562 err = asus_wmi_input_init(asus);
1563 if (err)
1564 goto fail_input;
1565
1566 err = asus_wmi_hwmon_init(asus);
1567 if (err)
1568 goto fail_hwmon;
1569
1570 err = asus_wmi_led_init(asus);
1571 if (err)
1572 goto fail_leds;
1573
1574 err = asus_wmi_rfkill_init(asus);
1575 if (err)
1576 goto fail_rfkill;
1577
1578 if (!acpi_video_backlight_support()) {
1579 err = asus_wmi_backlight_init(asus);
1580 if (err && err != -ENODEV)
1581 goto fail_backlight;
1582 } else
1583 pr_info("Backlight controlled by ACPI video driver\n");
1584
1585 status = wmi_install_notify_handler(asus->driver->event_guid,
1586 asus_wmi_notify, asus);
1587 if (ACPI_FAILURE(status)) {
1588 pr_err("Unable to register notify handler - %d\n", status);
1589 err = -ENODEV;
1590 goto fail_wmi_handler;
1591 }
1592
1593 err = asus_wmi_debugfs_init(asus);
1594 if (err)
1595 goto fail_debugfs;
1596
1597 return 0;
1598
1599 fail_debugfs:
1600 wmi_remove_notify_handler(asus->driver->event_guid);
1601 fail_wmi_handler:
1602 asus_wmi_backlight_exit(asus);
1603 fail_backlight:
1604 asus_wmi_rfkill_exit(asus);
1605 fail_rfkill:
1606 asus_wmi_led_exit(asus);
1607 fail_leds:
1608 asus_wmi_hwmon_exit(asus);
1609 fail_hwmon:
1610 asus_wmi_input_exit(asus);
1611 fail_input:
1612 asus_wmi_platform_exit(asus);
1613 fail_platform:
1614 kfree(asus);
1615 return err;
1616 }
1617
1618 static int asus_wmi_remove(struct platform_device *device)
1619 {
1620 struct asus_wmi *asus;
1621
1622 asus = platform_get_drvdata(device);
1623 wmi_remove_notify_handler(asus->driver->event_guid);
1624 asus_wmi_backlight_exit(asus);
1625 asus_wmi_input_exit(asus);
1626 asus_wmi_hwmon_exit(asus);
1627 asus_wmi_led_exit(asus);
1628 asus_wmi_rfkill_exit(asus);
1629 asus_wmi_debugfs_exit(asus);
1630 asus_wmi_platform_exit(asus);
1631
1632 kfree(asus);
1633 return 0;
1634 }
1635
1636 /*
1637 * Platform driver - hibernate/resume callbacks
1638 */
1639 static int asus_hotk_thaw(struct device *device)
1640 {
1641 struct asus_wmi *asus = dev_get_drvdata(device);
1642
1643 if (asus->wlan.rfkill) {
1644 bool wlan;
1645
1646 /*
1647 * Work around bios bug - acpi _PTS turns off the wireless led
1648 * during suspend. Normally it restores it on resume, but
1649 * we should kick it ourselves in case hibernation is aborted.
1650 */
1651 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1652 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1653 }
1654
1655 return 0;
1656 }
1657
1658 static int asus_hotk_restore(struct device *device)
1659 {
1660 struct asus_wmi *asus = dev_get_drvdata(device);
1661 int bl;
1662
1663 /* Refresh both wlan rfkill state and pci hotplug */
1664 if (asus->wlan.rfkill)
1665 asus_rfkill_hotplug(asus);
1666
1667 if (asus->bluetooth.rfkill) {
1668 bl = !asus_wmi_get_devstate_simple(asus,
1669 ASUS_WMI_DEVID_BLUETOOTH);
1670 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1671 }
1672 if (asus->wimax.rfkill) {
1673 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1674 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1675 }
1676 if (asus->wwan3g.rfkill) {
1677 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1678 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1679 }
1680
1681 return 0;
1682 }
1683
1684 static const struct dev_pm_ops asus_pm_ops = {
1685 .thaw = asus_hotk_thaw,
1686 .restore = asus_hotk_restore,
1687 };
1688
1689 static int asus_wmi_probe(struct platform_device *pdev)
1690 {
1691 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1692 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1693 int ret;
1694
1695 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1696 pr_warn("Management GUID not found\n");
1697 return -ENODEV;
1698 }
1699
1700 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1701 pr_warn("Event GUID not found\n");
1702 return -ENODEV;
1703 }
1704
1705 if (wdrv->probe) {
1706 ret = wdrv->probe(pdev);
1707 if (ret)
1708 return ret;
1709 }
1710
1711 return asus_wmi_add(pdev);
1712 }
1713
1714 static bool used;
1715
1716 int __init_or_module asus_wmi_register_driver(struct asus_wmi_driver *driver)
1717 {
1718 struct platform_driver *platform_driver;
1719 struct platform_device *platform_device;
1720
1721 if (used)
1722 return -EBUSY;
1723
1724 platform_driver = &driver->platform_driver;
1725 platform_driver->remove = asus_wmi_remove;
1726 platform_driver->driver.owner = driver->owner;
1727 platform_driver->driver.name = driver->name;
1728 platform_driver->driver.pm = &asus_pm_ops;
1729
1730 platform_device = platform_create_bundle(platform_driver,
1731 asus_wmi_probe,
1732 NULL, 0, NULL, 0);
1733 if (IS_ERR(platform_device))
1734 return PTR_ERR(platform_device);
1735
1736 used = true;
1737 return 0;
1738 }
1739 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1740
1741 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1742 {
1743 platform_device_unregister(driver->platform_device);
1744 platform_driver_unregister(&driver->platform_driver);
1745 used = false;
1746 }
1747 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1748
1749 static int __init asus_wmi_init(void)
1750 {
1751 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1752 pr_info("Asus Management GUID not found");
1753 return -ENODEV;
1754 }
1755
1756 pr_info("ASUS WMI generic driver loaded");
1757 return 0;
1758 }
1759
1760 static void __exit asus_wmi_exit(void)
1761 {
1762 pr_info("ASUS WMI generic driver unloaded");
1763 }
1764
1765 module_init(asus_wmi_init);
1766 module_exit(asus_wmi_exit);
Linux kernel - Deliverables
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