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The discovered bit in PGCCSR register indicates if the device has been
[linux-2.6/next.git] / drivers / platform / x86 / asus-wmi.c
blob95cba9ebf6c08ddab129840447367fb0e83aea9e
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);
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