2 * Asus PC WMI hotkey driver
4 * Copyright(C) 2010 Intel Corporation.
5 * Copyright(C) 2010-2011 Corentin Chary <corentin.chary@gmail.com>
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>
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.
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.
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
27 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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>
37 #include <linux/backlight.h>
38 #include <linux/leds.h>
39 #include <linux/rfkill.h>
40 #include <linux/pci.h>
41 #include <linux/pci_hotplug.h>
42 #include <linux/debugfs.h>
43 #include <linux/seq_file.h>
44 #include <linux/platform_device.h>
45 #include <acpi/acpi_bus.h>
46 #include <acpi/acpi_drivers.h>
50 MODULE_AUTHOR("Corentin Chary <corentincj@iksaif.net>, "
51 "Yong Wang <yong.y.wang@intel.com>");
52 MODULE_DESCRIPTION("Asus Generic WMI Driver");
53 MODULE_LICENSE("GPL");
55 #define to_platform_driver(drv) \
56 (container_of((drv), struct platform_driver, driver))
58 #define to_asus_wmi_driver(pdrv) \
59 (container_of((pdrv), struct asus_wmi_driver, platform_driver))
61 #define ASUS_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
63 #define NOTIFY_BRNUP_MIN 0x11
64 #define NOTIFY_BRNUP_MAX 0x1f
65 #define NOTIFY_BRNDOWN_MIN 0x20
66 #define NOTIFY_BRNDOWN_MAX 0x2e
69 #define ASUS_WMI_METHODID_SPEC 0x43455053 /* BIOS SPECification */
70 #define ASUS_WMI_METHODID_SFBD 0x44424653 /* Set First Boot Device */
71 #define ASUS_WMI_METHODID_GLCD 0x44434C47 /* Get LCD status */
72 #define ASUS_WMI_METHODID_GPID 0x44495047 /* Get Panel ID?? (Resol) */
73 #define ASUS_WMI_METHODID_QMOD 0x444F4D51 /* Quiet MODe */
74 #define ASUS_WMI_METHODID_SPLV 0x4C425053 /* Set Panel Light Value */
75 #define ASUS_WMI_METHODID_SFUN 0x4E554653 /* FUNCtionalities */
76 #define ASUS_WMI_METHODID_SDSP 0x50534453 /* Set DiSPlay output */
77 #define ASUS_WMI_METHODID_GDSP 0x50534447 /* Get DiSPlay output */
78 #define ASUS_WMI_METHODID_DEVP 0x50564544 /* DEVice Policy */
79 #define ASUS_WMI_METHODID_OSVR 0x5256534F /* OS VeRsion */
80 #define ASUS_WMI_METHODID_DSTS 0x53544344 /* Device STatuS */
81 #define ASUS_WMI_METHODID_DSTS2 0x53545344 /* Device STatuS #2*/
82 #define ASUS_WMI_METHODID_BSTS 0x53545342 /* Bios STatuS ? */
83 #define ASUS_WMI_METHODID_DEVS 0x53564544 /* DEVice Set */
84 #define ASUS_WMI_METHODID_CFVS 0x53564643 /* CPU Frequency Volt Set */
85 #define ASUS_WMI_METHODID_KBFT 0x5446424B /* KeyBoard FilTer */
86 #define ASUS_WMI_METHODID_INIT 0x54494E49 /* INITialize */
87 #define ASUS_WMI_METHODID_HKEY 0x59454B48 /* Hot KEY ?? */
89 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE
92 #define ASUS_WMI_DEVID_HW_SWITCH 0x00010001
93 #define ASUS_WMI_DEVID_WIRELESS_LED 0x00010002
94 #define ASUS_WMI_DEVID_WLAN 0x00010011
95 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013
96 #define ASUS_WMI_DEVID_GPS 0x00010015
97 #define ASUS_WMI_DEVID_WIMAX 0x00010017
98 #define ASUS_WMI_DEVID_WWAN3G 0x00010019
99 #define ASUS_WMI_DEVID_UWB 0x00010021
102 /* 0x000200XX and 0x000400XX */
104 /* Backlight and Brightness */
105 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
106 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
107 #define ASUS_WMI_DEVID_KBD_BACKLIGHT 0x00050021
108 #define ASUS_WMI_DEVID_LIGHT_SENSOR 0x00050022 /* ?? */
111 #define ASUS_WMI_DEVID_CAMERA 0x00060013
114 #define ASUS_WMI_DEVID_CARDREADER 0x00080013
117 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
118 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
121 #define ASUS_WMI_DEVID_THERMAL_CTRL 0x00110011
122 #define ASUS_WMI_DEVID_FAN_CTRL 0x00110012
125 #define ASUS_WMI_DEVID_PROCESSOR_STATE 0x00120012
128 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
129 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
130 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000
131 #define ASUS_WMI_DSTS_USER_BIT 0x00020000
132 #define ASUS_WMI_DSTS_BIOS_BIT 0x00040000
133 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
134 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
142 * <platform>/ - debugfs root directory
143 * dev_id - current dev_id
144 * ctrl_param - current ctrl_param
145 * method_id - current method_id
146 * devs - call DEVS(dev_id, ctrl_param) and print result
147 * dsts - call DSTS(dev_id) and print result
148 * call - call method_id(dev_id, ctrl_param) and print result
150 struct asus_wmi_debug {
158 struct asus_wmi *asus;
159 struct rfkill *rfkill;
168 struct input_dev *inputdev;
169 struct backlight_device *backlight_device;
170 struct platform_device *platform_device;
172 struct led_classdev tpd_led;
174 struct workqueue_struct *led_workqueue;
175 struct work_struct tpd_led_work;
177 struct asus_rfkill wlan;
178 struct asus_rfkill bluetooth;
179 struct asus_rfkill wimax;
180 struct asus_rfkill wwan3g;
182 struct hotplug_slot *hotplug_slot;
183 struct mutex hotplug_lock;
184 struct mutex wmi_lock;
185 struct workqueue_struct *hotplug_workqueue;
186 struct work_struct hotplug_work;
188 struct asus_wmi_debug debug;
190 struct asus_wmi_driver *driver;
193 static int asus_wmi_input_init(struct asus_wmi *asus)
197 asus->inputdev = input_allocate_device();
201 asus->inputdev->name = asus->driver->input_phys;
202 asus->inputdev->phys = asus->driver->input_name;
203 asus->inputdev->id.bustype = BUS_HOST;
204 asus->inputdev->dev.parent = &asus->platform_device->dev;
206 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
210 err = input_register_device(asus->inputdev);
212 goto err_free_keymap;
217 sparse_keymap_free(asus->inputdev);
219 input_free_device(asus->inputdev);
223 static void asus_wmi_input_exit(struct asus_wmi *asus)
225 if (asus->inputdev) {
226 sparse_keymap_free(asus->inputdev);
227 input_unregister_device(asus->inputdev);
230 asus->inputdev = NULL;
233 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
236 struct bios_args args = {
240 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
241 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
243 union acpi_object *obj;
246 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
249 if (ACPI_FAILURE(status))
252 obj = (union acpi_object *)output.pointer;
253 if (obj && obj->type == ACPI_TYPE_INTEGER)
254 tmp = (u32) obj->integer.value;
264 if (ACPI_FAILURE(status))
267 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
273 static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
275 return asus_wmi_evaluate_method(asus->dsts_id, dev_id, 0, retval);
278 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
281 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
285 /* Helper for special devices with magic return codes */
286 static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,
287 u32 dev_id, u32 mask)
292 err = asus_wmi_get_devstate(asus, dev_id, &retval);
297 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
300 if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
301 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
305 return retval & mask;
308 static int asus_wmi_get_devstate_simple(struct asus_wmi *asus, u32 dev_id)
310 return asus_wmi_get_devstate_bits(asus, dev_id,
311 ASUS_WMI_DSTS_STATUS_BIT);
318 * These functions actually update the LED's, and are called from a
319 * workqueue. By doing this as separate work rather than when the LED
320 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
321 * potentially bad time, such as a timer interrupt.
323 static void tpd_led_update(struct work_struct *work)
326 struct asus_wmi *asus;
328 asus = container_of(work, struct asus_wmi, tpd_led_work);
330 ctrl_param = asus->tpd_led_wk;
331 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
334 static void tpd_led_set(struct led_classdev *led_cdev,
335 enum led_brightness value)
337 struct asus_wmi *asus;
339 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
341 asus->tpd_led_wk = !!value;
342 queue_work(asus->led_workqueue, &asus->tpd_led_work);
345 static int read_tpd_led_state(struct asus_wmi *asus)
347 return asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_TOUCHPAD_LED);
350 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
352 struct asus_wmi *asus;
354 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
356 return read_tpd_led_state(asus);
359 static int asus_wmi_led_init(struct asus_wmi *asus)
363 if (read_tpd_led_state(asus) < 0)
366 asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
367 if (!asus->led_workqueue)
369 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
371 asus->tpd_led.name = "asus::touchpad";
372 asus->tpd_led.brightness_set = tpd_led_set;
373 asus->tpd_led.brightness_get = tpd_led_get;
374 asus->tpd_led.max_brightness = 1;
376 rv = led_classdev_register(&asus->platform_device->dev, &asus->tpd_led);
378 destroy_workqueue(asus->led_workqueue);
385 static void asus_wmi_led_exit(struct asus_wmi *asus)
387 if (asus->tpd_led.dev)
388 led_classdev_unregister(&asus->tpd_led);
389 if (asus->led_workqueue)
390 destroy_workqueue(asus->led_workqueue);
394 * PCI hotplug (for wlan rfkill)
396 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
398 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
405 static void asus_rfkill_hotplug(struct asus_wmi *asus)
413 mutex_lock(&asus->wmi_lock);
414 blocked = asus_wlan_rfkill_blocked(asus);
415 mutex_unlock(&asus->wmi_lock);
417 mutex_lock(&asus->hotplug_lock);
419 if (asus->wlan.rfkill)
420 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
422 if (asus->hotplug_slot) {
423 bus = pci_find_bus(0, 1);
425 pr_warning("Unable to find PCI bus 1?\n");
429 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
430 pr_err("Unable to read PCI config space?\n");
433 absent = (l == 0xffffffff);
435 if (blocked != absent) {
436 pr_warning("BIOS says wireless lan is %s, "
437 "but the pci device is %s\n",
438 blocked ? "blocked" : "unblocked",
439 absent ? "absent" : "present");
440 pr_warning("skipped wireless hotplug as probably "
441 "inappropriate for this model\n");
446 dev = pci_get_slot(bus, 0);
448 /* Device already present */
452 dev = pci_scan_single_device(bus, 0);
454 pci_bus_assign_resources(bus);
455 if (pci_bus_add_device(dev))
456 pr_err("Unable to hotplug wifi\n");
459 dev = pci_get_slot(bus, 0);
461 pci_remove_bus_device(dev);
468 mutex_unlock(&asus->hotplug_lock);
471 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
473 struct asus_wmi *asus = data;
475 if (event != ACPI_NOTIFY_BUS_CHECK)
479 * We can't call directly asus_rfkill_hotplug because most
480 * of the time WMBC is still being executed and not reetrant.
481 * There is currently no way to tell ACPICA that we want this
482 * method to be serialized, we schedule a asus_rfkill_hotplug
483 * call later, in a safer context.
485 queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
488 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
493 status = acpi_get_handle(NULL, node, &handle);
495 if (ACPI_SUCCESS(status)) {
496 status = acpi_install_notify_handler(handle,
498 asus_rfkill_notify, asus);
499 if (ACPI_FAILURE(status))
500 pr_warning("Failed to register notify on %s\n", node);
507 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
509 acpi_status status = AE_OK;
512 status = acpi_get_handle(NULL, node, &handle);
514 if (ACPI_SUCCESS(status)) {
515 status = acpi_remove_notify_handler(handle,
518 if (ACPI_FAILURE(status))
519 pr_err("Error removing rfkill notify handler %s\n",
524 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
527 struct asus_wmi *asus = hotplug_slot->private;
528 int result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
537 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
539 kfree(hotplug_slot->info);
543 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
544 .owner = THIS_MODULE,
545 .get_adapter_status = asus_get_adapter_status,
546 .get_power_status = asus_get_adapter_status,
549 static void asus_hotplug_work(struct work_struct *work)
551 struct asus_wmi *asus;
553 asus = container_of(work, struct asus_wmi, hotplug_work);
554 asus_rfkill_hotplug(asus);
557 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
560 struct pci_bus *bus = pci_find_bus(0, 1);
563 pr_err("Unable to find wifi PCI bus\n");
567 asus->hotplug_workqueue =
568 create_singlethread_workqueue("hotplug_workqueue");
569 if (!asus->hotplug_workqueue)
570 goto error_workqueue;
572 INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
574 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
575 if (!asus->hotplug_slot)
578 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
580 if (!asus->hotplug_slot->info)
583 asus->hotplug_slot->private = asus;
584 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
585 asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
586 asus_get_adapter_status(asus->hotplug_slot,
587 &asus->hotplug_slot->info->adapter_status);
589 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
591 pr_err("Unable to register hotplug slot - %d\n", ret);
598 kfree(asus->hotplug_slot->info);
600 kfree(asus->hotplug_slot);
601 asus->hotplug_slot = NULL;
603 destroy_workqueue(asus->hotplug_workqueue);
611 static int asus_rfkill_set(void *data, bool blocked)
613 struct asus_rfkill *priv = data;
614 u32 ctrl_param = !blocked;
616 return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL);
619 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
621 struct asus_rfkill *priv = data;
624 result = asus_wmi_get_devstate_simple(priv->asus, priv->dev_id);
629 rfkill_set_sw_state(priv->rfkill, !result);
632 static int asus_rfkill_wlan_set(void *data, bool blocked)
634 struct asus_rfkill *priv = data;
635 struct asus_wmi *asus = priv->asus;
639 * This handler is enabled only if hotplug is enabled.
640 * In this case, the asus_wmi_set_devstate() will
641 * trigger a wmi notification and we need to wait
642 * this call to finish before being able to call
645 mutex_lock(&asus->wmi_lock);
646 ret = asus_rfkill_set(data, blocked);
647 mutex_unlock(&asus->wmi_lock);
651 static const struct rfkill_ops asus_rfkill_wlan_ops = {
652 .set_block = asus_rfkill_wlan_set,
653 .query = asus_rfkill_query,
656 static const struct rfkill_ops asus_rfkill_ops = {
657 .set_block = asus_rfkill_set,
658 .query = asus_rfkill_query,
661 static int asus_new_rfkill(struct asus_wmi *asus,
662 struct asus_rfkill *arfkill,
663 const char *name, enum rfkill_type type, int dev_id)
665 int result = asus_wmi_get_devstate_simple(asus, dev_id);
666 struct rfkill **rfkill = &arfkill->rfkill;
671 arfkill->dev_id = dev_id;
672 arfkill->asus = asus;
674 if (dev_id == ASUS_WMI_DEVID_WLAN && asus->driver->hotplug_wireless)
675 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
676 &asus_rfkill_wlan_ops, arfkill);
678 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
679 &asus_rfkill_ops, arfkill);
684 rfkill_init_sw_state(*rfkill, !result);
685 result = rfkill_register(*rfkill);
687 rfkill_destroy(*rfkill);
694 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
696 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
697 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
698 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
699 if (asus->wlan.rfkill) {
700 rfkill_unregister(asus->wlan.rfkill);
701 rfkill_destroy(asus->wlan.rfkill);
702 asus->wlan.rfkill = NULL;
705 * Refresh pci hotplug in case the rfkill state was changed after
706 * asus_unregister_rfkill_notifier()
708 asus_rfkill_hotplug(asus);
709 if (asus->hotplug_slot)
710 pci_hp_deregister(asus->hotplug_slot);
711 if (asus->hotplug_workqueue)
712 destroy_workqueue(asus->hotplug_workqueue);
714 if (asus->bluetooth.rfkill) {
715 rfkill_unregister(asus->bluetooth.rfkill);
716 rfkill_destroy(asus->bluetooth.rfkill);
717 asus->bluetooth.rfkill = NULL;
719 if (asus->wimax.rfkill) {
720 rfkill_unregister(asus->wimax.rfkill);
721 rfkill_destroy(asus->wimax.rfkill);
722 asus->wimax.rfkill = NULL;
724 if (asus->wwan3g.rfkill) {
725 rfkill_unregister(asus->wwan3g.rfkill);
726 rfkill_destroy(asus->wwan3g.rfkill);
727 asus->wwan3g.rfkill = NULL;
731 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
735 mutex_init(&asus->hotplug_lock);
736 mutex_init(&asus->wmi_lock);
738 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
739 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
741 if (result && result != -ENODEV)
744 result = asus_new_rfkill(asus, &asus->bluetooth,
745 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
746 ASUS_WMI_DEVID_BLUETOOTH);
748 if (result && result != -ENODEV)
751 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
752 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
754 if (result && result != -ENODEV)
757 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
758 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
760 if (result && result != -ENODEV)
763 if (!asus->driver->hotplug_wireless)
766 result = asus_setup_pci_hotplug(asus);
768 * If we get -EBUSY then something else is handling the PCI hotplug -
769 * don't fail in this case
771 if (result == -EBUSY)
774 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
775 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
776 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
778 * Refresh pci hotplug in case the rfkill state was changed during
781 asus_rfkill_hotplug(asus);
784 if (result && result != -ENODEV)
785 asus_wmi_rfkill_exit(asus);
787 if (result == -ENODEV)
796 static int read_backlight_power(struct asus_wmi *asus)
798 int ret = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_BACKLIGHT);
803 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
806 static int read_brightness_max(struct asus_wmi *asus)
811 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
816 retval = retval & ASUS_WMI_DSTS_MAX_BRIGTH_MASK;
825 static int read_brightness(struct backlight_device *bd)
827 struct asus_wmi *asus = bl_get_data(bd);
830 err = asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_BRIGHTNESS, &retval);
835 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
838 static int update_bl_status(struct backlight_device *bd)
840 struct asus_wmi *asus = bl_get_data(bd);
844 ctrl_param = bd->props.brightness;
846 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
852 power = read_backlight_power(asus);
853 if (power != -ENODEV && bd->props.power != power) {
854 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
855 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
861 static const struct backlight_ops asus_wmi_bl_ops = {
862 .get_brightness = read_brightness,
863 .update_status = update_bl_status,
866 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
868 struct backlight_device *bd = asus->backlight_device;
869 int old = bd->props.brightness;
872 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
873 new = code - NOTIFY_BRNUP_MIN + 1;
874 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
875 new = code - NOTIFY_BRNDOWN_MIN;
877 bd->props.brightness = new;
878 backlight_update_status(bd);
879 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
884 static int asus_wmi_backlight_init(struct asus_wmi *asus)
886 struct backlight_device *bd;
887 struct backlight_properties props;
891 max = read_brightness_max(asus);
898 power = read_backlight_power(asus);
900 if (power == -ENODEV)
901 power = FB_BLANK_UNBLANK;
905 memset(&props, 0, sizeof(struct backlight_properties));
906 props.max_brightness = max;
907 bd = backlight_device_register(asus->driver->name,
908 &asus->platform_device->dev, asus,
909 &asus_wmi_bl_ops, &props);
911 pr_err("Could not register backlight device\n");
915 asus->backlight_device = bd;
917 bd->props.brightness = read_brightness(bd);
918 bd->props.power = power;
919 backlight_update_status(bd);
924 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
926 if (asus->backlight_device)
927 backlight_device_unregister(asus->backlight_device);
929 asus->backlight_device = NULL;
932 static void asus_wmi_notify(u32 value, void *context)
934 struct asus_wmi *asus = context;
935 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
936 union acpi_object *obj;
941 status = wmi_get_event_data(value, &response);
942 if (status != AE_OK) {
943 pr_err("bad event status 0x%x\n", status);
947 obj = (union acpi_object *)response.pointer;
949 if (!obj || obj->type != ACPI_TYPE_INTEGER)
952 code = obj->integer.value;
955 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
956 code = NOTIFY_BRNUP_MIN;
957 else if (code >= NOTIFY_BRNDOWN_MIN &&
958 code <= NOTIFY_BRNDOWN_MAX)
959 code = NOTIFY_BRNDOWN_MIN;
961 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
962 if (!acpi_video_backlight_support())
963 asus_wmi_backlight_notify(asus, orig_code);
964 } else if (!sparse_keymap_report_event(asus->inputdev, code, 1, true))
965 pr_info("Unknown key %x pressed\n", code);
974 static int parse_arg(const char *buf, unsigned long count, int *val)
978 if (sscanf(buf, "%i", val) != 1)
983 static ssize_t store_sys_wmi(struct asus_wmi *asus, int devid,
984 const char *buf, size_t count)
989 value = asus_wmi_get_devstate_simple(asus, devid);
990 if (value == -ENODEV) /* Check device presence */
993 rv = parse_arg(buf, count, &value);
994 err = asus_wmi_set_devstate(devid, value, &retval);
1002 static ssize_t show_sys_wmi(struct asus_wmi *asus, int devid, char *buf)
1004 int value = asus_wmi_get_devstate_simple(asus, devid);
1009 return sprintf(buf, "%d\n", value);
1012 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
1013 static ssize_t show_##_name(struct device *dev, \
1014 struct device_attribute *attr, \
1017 struct asus_wmi *asus = dev_get_drvdata(dev); \
1019 return show_sys_wmi(asus, _cm, buf); \
1021 static ssize_t store_##_name(struct device *dev, \
1022 struct device_attribute *attr, \
1023 const char *buf, size_t count) \
1025 struct asus_wmi *asus = dev_get_drvdata(dev); \
1027 return store_sys_wmi(asus, _cm, buf, count); \
1029 static struct device_attribute dev_attr_##_name = { \
1031 .name = __stringify(_name), \
1033 .show = show_##_name, \
1034 .store = store_##_name, \
1037 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
1038 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
1039 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
1041 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1042 const char *buf, size_t count)
1046 if (!count || sscanf(buf, "%i", &value) != 1)
1048 if (value < 0 || value > 2)
1051 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
1054 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1056 static struct attribute *platform_attributes[] = {
1057 &dev_attr_cpufv.attr,
1058 &dev_attr_camera.attr,
1059 &dev_attr_cardr.attr,
1060 &dev_attr_touchpad.attr,
1064 static mode_t asus_sysfs_is_visible(struct kobject *kobj,
1065 struct attribute *attr, int idx)
1067 struct device *dev = container_of(kobj, struct device, kobj);
1068 struct platform_device *pdev = to_platform_device(dev);
1069 struct asus_wmi *asus = platform_get_drvdata(pdev);
1073 if (attr == &dev_attr_camera.attr)
1074 devid = ASUS_WMI_DEVID_CAMERA;
1075 else if (attr == &dev_attr_cardr.attr)
1076 devid = ASUS_WMI_DEVID_CARDREADER;
1077 else if (attr == &dev_attr_touchpad.attr)
1078 devid = ASUS_WMI_DEVID_TOUCHPAD;
1081 ok = !(asus_wmi_get_devstate_simple(asus, devid) < 0);
1083 return ok ? attr->mode : 0;
1086 static struct attribute_group platform_attribute_group = {
1087 .is_visible = asus_sysfs_is_visible,
1088 .attrs = platform_attributes
1091 static void asus_wmi_sysfs_exit(struct platform_device *device)
1093 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1096 static int asus_wmi_sysfs_init(struct platform_device *device)
1098 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1104 static int __init asus_wmi_platform_init(struct asus_wmi *asus)
1108 /* INIT enable hotkeys on some models */
1109 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_INIT, 0, 0, &rv))
1110 pr_info("Initialization: %#x", rv);
1112 /* We don't know yet what to do with this version... */
1113 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SPEC, 0, 0x9, &rv)) {
1114 pr_info("BIOS WMI version: %d.%d", rv >> 8, rv & 0xFF);
1119 * The SFUN method probably allows the original driver to get the list
1120 * of features supported by a given model. For now, 0x0100 or 0x0800
1121 * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
1122 * The significance of others is yet to be found.
1124 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_SFUN, 0, 0, &rv)) {
1125 pr_info("SFUN value: %#x", rv);
1130 * Eee PC and Notebooks seems to have different method_id for DSTS,
1131 * but it may also be related to the BIOS's SPEC.
1132 * Note, on most Eeepc, there is no way to check if a method exist
1133 * or note, while on notebooks, they returns 0xFFFFFFFE on failure,
1134 * but once again, SPEC may probably be used for that kind of things.
1136 if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, 0, 0, NULL))
1137 asus->dsts_id = ASUS_WMI_METHODID_DSTS;
1138 else if (!asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, 0, 0, NULL))
1139 asus->dsts_id = ASUS_WMI_METHODID_DSTS2;
1141 if (!asus->dsts_id) {
1142 pr_err("Can't find DSTS");
1146 return asus_wmi_sysfs_init(asus->platform_device);
1149 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1151 asus_wmi_sysfs_exit(asus->platform_device);
1157 struct asus_wmi_debugfs_node {
1158 struct asus_wmi *asus;
1160 int (*show) (struct seq_file *m, void *data);
1163 static int show_dsts(struct seq_file *m, void *data)
1165 struct asus_wmi *asus = m->private;
1169 err = asus_wmi_get_devstate(asus, asus->debug.dev_id, &retval);
1174 seq_printf(m, "DSTS(%#x) = %#x\n", asus->debug.dev_id, retval);
1179 static int show_devs(struct seq_file *m, void *data)
1181 struct asus_wmi *asus = m->private;
1185 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1191 seq_printf(m, "DEVS(%#x, %#x) = %#x\n", asus->debug.dev_id,
1192 asus->debug.ctrl_param, retval);
1197 static int show_call(struct seq_file *m, void *data)
1199 struct asus_wmi *asus = m->private;
1200 struct bios_args args = {
1201 .arg0 = asus->debug.dev_id,
1202 .arg1 = asus->debug.ctrl_param,
1204 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
1205 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
1206 union acpi_object *obj;
1209 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID,
1210 1, asus->debug.method_id,
1213 if (ACPI_FAILURE(status))
1216 obj = (union acpi_object *)output.pointer;
1217 if (obj && obj->type == ACPI_TYPE_INTEGER)
1218 seq_printf(m, "%#x(%#x, %#x) = %#x\n", asus->debug.method_id,
1219 asus->debug.dev_id, asus->debug.ctrl_param,
1220 (u32) obj->integer.value);
1222 seq_printf(m, "%#x(%#x, %#x) = t:%d\n", asus->debug.method_id,
1223 asus->debug.dev_id, asus->debug.ctrl_param,
1231 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1232 {NULL, "devs", show_devs},
1233 {NULL, "dsts", show_dsts},
1234 {NULL, "call", show_call},
1237 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1239 struct asus_wmi_debugfs_node *node = inode->i_private;
1241 return single_open(file, node->show, node->asus);
1244 static const struct file_operations asus_wmi_debugfs_io_ops = {
1245 .owner = THIS_MODULE,
1246 .open = asus_wmi_debugfs_open,
1248 .llseek = seq_lseek,
1249 .release = single_release,
1252 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1254 debugfs_remove_recursive(asus->debug.root);
1257 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1259 struct dentry *dent;
1262 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1263 if (!asus->debug.root) {
1264 pr_err("failed to create debugfs directory");
1268 dent = debugfs_create_x32("method_id", S_IRUGO | S_IWUSR,
1269 asus->debug.root, &asus->debug.method_id);
1273 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1274 asus->debug.root, &asus->debug.dev_id);
1278 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1279 asus->debug.root, &asus->debug.ctrl_param);
1283 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1284 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1287 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1288 asus->debug.root, node,
1289 &asus_wmi_debugfs_io_ops);
1291 pr_err("failed to create debug file: %s\n", node->name);
1299 asus_wmi_debugfs_exit(asus);
1306 static int asus_wmi_add(struct platform_device *pdev)
1308 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1309 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1310 struct asus_wmi *asus;
1314 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1318 asus->driver = wdrv;
1319 asus->platform_device = pdev;
1320 wdrv->platform_device = pdev;
1321 platform_set_drvdata(asus->platform_device, asus);
1324 wdrv->quirks(asus->driver);
1326 err = asus_wmi_platform_init(asus);
1330 err = asus_wmi_input_init(asus);
1334 err = asus_wmi_led_init(asus);
1338 err = asus_wmi_rfkill_init(asus);
1342 if (!acpi_video_backlight_support()) {
1343 err = asus_wmi_backlight_init(asus);
1344 if (err && err != -ENODEV)
1345 goto fail_backlight;
1347 pr_info("Backlight controlled by ACPI video driver\n");
1349 status = wmi_install_notify_handler(asus->driver->event_guid,
1350 asus_wmi_notify, asus);
1351 if (ACPI_FAILURE(status)) {
1352 pr_err("Unable to register notify handler - %d\n", status);
1354 goto fail_wmi_handler;
1357 err = asus_wmi_debugfs_init(asus);
1364 wmi_remove_notify_handler(asus->driver->event_guid);
1366 asus_wmi_backlight_exit(asus);
1368 asus_wmi_rfkill_exit(asus);
1370 asus_wmi_led_exit(asus);
1372 asus_wmi_input_exit(asus);
1374 asus_wmi_platform_exit(asus);
1380 static int asus_wmi_remove(struct platform_device *device)
1382 struct asus_wmi *asus;
1384 asus = platform_get_drvdata(device);
1385 wmi_remove_notify_handler(asus->driver->event_guid);
1386 asus_wmi_backlight_exit(asus);
1387 asus_wmi_input_exit(asus);
1388 asus_wmi_led_exit(asus);
1389 asus_wmi_rfkill_exit(asus);
1390 asus_wmi_debugfs_exit(asus);
1391 asus_wmi_platform_exit(asus);
1398 * Platform driver - hibernate/resume callbacks
1400 static int asus_hotk_thaw(struct device *device)
1402 struct asus_wmi *asus = dev_get_drvdata(device);
1404 if (asus->wlan.rfkill) {
1408 * Work around bios bug - acpi _PTS turns off the wireless led
1409 * during suspend. Normally it restores it on resume, but
1410 * we should kick it ourselves in case hibernation is aborted.
1412 wlan = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WLAN);
1413 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1419 static int asus_hotk_restore(struct device *device)
1421 struct asus_wmi *asus = dev_get_drvdata(device);
1424 /* Refresh both wlan rfkill state and pci hotplug */
1425 if (asus->wlan.rfkill)
1426 asus_rfkill_hotplug(asus);
1428 if (asus->bluetooth.rfkill) {
1429 bl = !asus_wmi_get_devstate_simple(asus,
1430 ASUS_WMI_DEVID_BLUETOOTH);
1431 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1433 if (asus->wimax.rfkill) {
1434 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WIMAX);
1435 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1437 if (asus->wwan3g.rfkill) {
1438 bl = !asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_WWAN3G);
1439 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1445 static const struct dev_pm_ops asus_pm_ops = {
1446 .thaw = asus_hotk_thaw,
1447 .restore = asus_hotk_restore,
1450 static int asus_wmi_probe(struct platform_device *pdev)
1452 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1453 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1456 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1457 pr_warning("Management GUID not found\n");
1461 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1462 pr_warning("Event GUID not found\n");
1467 ret = wdrv->probe(pdev);
1472 return asus_wmi_add(pdev);
1477 int asus_wmi_register_driver(struct asus_wmi_driver *driver)
1479 struct platform_driver *platform_driver;
1480 struct platform_device *platform_device;
1485 platform_driver = &driver->platform_driver;
1486 platform_driver->remove = asus_wmi_remove;
1487 platform_driver->driver.owner = driver->owner;
1488 platform_driver->driver.name = driver->name;
1489 platform_driver->driver.pm = &asus_pm_ops;
1491 platform_device = platform_create_bundle(platform_driver,
1494 if (IS_ERR(platform_device))
1495 return PTR_ERR(platform_device);
1500 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1502 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1504 platform_device_unregister(driver->platform_device);
1505 platform_driver_unregister(&driver->platform_driver);
1508 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1510 static int __init asus_wmi_init(void)
1512 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1513 pr_info("Asus Management GUID not found");
1517 pr_info("ASUS WMI generic driver loaded");
1521 static void __exit asus_wmi_exit(void)
1523 pr_info("ASUS WMI generic driver unloaded");
1526 module_init(asus_wmi_init);
1527 module_exit(asus_wmi_exit);