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_DSTS 0x53544344
70 #define ASUS_WMI_METHODID_DEVS 0x53564544
71 #define ASUS_WMI_METHODID_CFVS 0x53564643
73 #define ASUS_WMI_UNSUPPORTED_METHOD 0xFFFFFFFE
76 #define ASUS_WMI_DEVID_WLAN 0x00010011
77 #define ASUS_WMI_DEVID_BLUETOOTH 0x00010013
78 #define ASUS_WMI_DEVID_WIMAX 0x00010017
79 #define ASUS_WMI_DEVID_WWAN3G 0x00010019
81 /* Backlight and Brightness */
82 #define ASUS_WMI_DEVID_BACKLIGHT 0x00050011
83 #define ASUS_WMI_DEVID_BRIGHTNESS 0x00050012
86 #define ASUS_WMI_DEVID_CAMERA 0x00060013
89 #define ASUS_WMI_DEVID_CARDREADER 0x00080013
92 #define ASUS_WMI_DEVID_TOUCHPAD 0x00100011
93 #define ASUS_WMI_DEVID_TOUCHPAD_LED 0x00100012
96 #define ASUS_WMI_DSTS_STATUS_BIT 0x00000001
97 #define ASUS_WMI_DSTS_UNKNOWN_BIT 0x00000002
98 #define ASUS_WMI_DSTS_PRESENCE_BIT 0x00010000
99 #define ASUS_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
100 #define ASUS_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
108 * <platform>/ - debugfs root directory
109 * dev_id - current dev_id
110 * ctrl_param - current ctrl_param
111 * devs - call DEVS(dev_id, ctrl_param) and print result
112 * dsts - call DSTS(dev_id) and print result
114 struct asus_wmi_debug {
121 struct asus_wmi *asus;
122 struct rfkill *rfkill;
127 struct input_dev *inputdev;
128 struct backlight_device *backlight_device;
129 struct platform_device *platform_device;
131 struct led_classdev tpd_led;
133 struct workqueue_struct *led_workqueue;
134 struct work_struct tpd_led_work;
136 struct asus_rfkill wlan;
137 struct asus_rfkill bluetooth;
138 struct asus_rfkill wimax;
139 struct asus_rfkill wwan3g;
141 struct hotplug_slot *hotplug_slot;
142 struct mutex hotplug_lock;
143 struct mutex wmi_lock;
144 struct workqueue_struct *hotplug_workqueue;
145 struct work_struct hotplug_work;
147 struct asus_wmi_debug debug;
149 struct asus_wmi_driver *driver;
152 static int asus_wmi_input_init(struct asus_wmi *asus)
156 asus->inputdev = input_allocate_device();
160 asus->inputdev->name = asus->driver->input_phys;
161 asus->inputdev->phys = asus->driver->input_name;
162 asus->inputdev->id.bustype = BUS_HOST;
163 asus->inputdev->dev.parent = &asus->platform_device->dev;
165 err = sparse_keymap_setup(asus->inputdev, asus->driver->keymap, NULL);
169 err = input_register_device(asus->inputdev);
171 goto err_free_keymap;
176 sparse_keymap_free(asus->inputdev);
178 input_free_device(asus->inputdev);
182 static void asus_wmi_input_exit(struct asus_wmi *asus)
184 if (asus->inputdev) {
185 sparse_keymap_free(asus->inputdev);
186 input_unregister_device(asus->inputdev);
189 asus->inputdev = NULL;
192 static int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
195 struct bios_args args = {
199 struct acpi_buffer input = { (acpi_size) sizeof(args), &args };
200 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
202 union acpi_object *obj;
205 status = wmi_evaluate_method(ASUS_WMI_MGMT_GUID, 1, method_id,
208 if (ACPI_FAILURE(status))
211 obj = (union acpi_object *)output.pointer;
212 if (obj && obj->type == ACPI_TYPE_INTEGER)
213 tmp = (u32) obj->integer.value;
223 if (ACPI_FAILURE(status))
226 if (tmp == ASUS_WMI_UNSUPPORTED_METHOD)
232 static int asus_wmi_get_devstate(u32 dev_id, u32 *retval)
234 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, dev_id,
238 static int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
241 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
245 /* Helper for special devices with magic return codes */
246 static int asus_wmi_get_devstate_bits(u32 dev_id, u32 mask)
251 err = asus_wmi_get_devstate(dev_id, &retval);
256 if (!(retval & ASUS_WMI_DSTS_PRESENCE_BIT))
259 if (mask == ASUS_WMI_DSTS_STATUS_BIT) {
260 if (retval & ASUS_WMI_DSTS_UNKNOWN_BIT)
264 return retval & mask;
267 static int asus_wmi_get_devstate_simple(u32 dev_id)
269 return asus_wmi_get_devstate_bits(dev_id, ASUS_WMI_DSTS_STATUS_BIT);
276 * These functions actually update the LED's, and are called from a
277 * workqueue. By doing this as separate work rather than when the LED
278 * subsystem asks, we avoid messing with the Asus ACPI stuff during a
279 * potentially bad time, such as a timer interrupt.
281 static void tpd_led_update(struct work_struct *work)
284 struct asus_wmi *asus;
286 asus = container_of(work, struct asus_wmi, tpd_led_work);
288 ctrl_param = asus->tpd_led_wk;
289 asus_wmi_set_devstate(ASUS_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
292 static void tpd_led_set(struct led_classdev *led_cdev,
293 enum led_brightness value)
295 struct asus_wmi *asus;
297 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
299 asus->tpd_led_wk = !!value;
300 queue_work(asus->led_workqueue, &asus->tpd_led_work);
303 static int read_tpd_led_state(struct asus_wmi *asus)
305 return asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_TOUCHPAD_LED);
308 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
310 struct asus_wmi *asus;
312 asus = container_of(led_cdev, struct asus_wmi, tpd_led);
314 return read_tpd_led_state(asus);
317 static int asus_wmi_led_init(struct asus_wmi *asus)
321 if (read_tpd_led_state(asus) < 0)
324 asus->led_workqueue = create_singlethread_workqueue("led_workqueue");
325 if (!asus->led_workqueue)
327 INIT_WORK(&asus->tpd_led_work, tpd_led_update);
329 asus->tpd_led.name = "asus::touchpad";
330 asus->tpd_led.brightness_set = tpd_led_set;
331 asus->tpd_led.brightness_get = tpd_led_get;
332 asus->tpd_led.max_brightness = 1;
334 rv = led_classdev_register(&asus->platform_device->dev, &asus->tpd_led);
336 destroy_workqueue(asus->led_workqueue);
343 static void asus_wmi_led_exit(struct asus_wmi *asus)
345 if (asus->tpd_led.dev)
346 led_classdev_unregister(&asus->tpd_led);
347 if (asus->led_workqueue)
348 destroy_workqueue(asus->led_workqueue);
352 * PCI hotplug (for wlan rfkill)
354 static bool asus_wlan_rfkill_blocked(struct asus_wmi *asus)
356 int result = asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_WLAN);
363 static void asus_rfkill_hotplug(struct asus_wmi *asus)
371 mutex_lock(&asus->wmi_lock);
372 blocked = asus_wlan_rfkill_blocked(asus);
373 mutex_unlock(&asus->wmi_lock);
375 mutex_lock(&asus->hotplug_lock);
377 if (asus->wlan.rfkill)
378 rfkill_set_sw_state(asus->wlan.rfkill, blocked);
380 if (asus->hotplug_slot) {
381 bus = pci_find_bus(0, 1);
383 pr_warning("Unable to find PCI bus 1?\n");
387 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
388 pr_err("Unable to read PCI config space?\n");
391 absent = (l == 0xffffffff);
393 if (blocked != absent) {
394 pr_warning("BIOS says wireless lan is %s, "
395 "but the pci device is %s\n",
396 blocked ? "blocked" : "unblocked",
397 absent ? "absent" : "present");
398 pr_warning("skipped wireless hotplug as probably "
399 "inappropriate for this model\n");
404 dev = pci_get_slot(bus, 0);
406 /* Device already present */
410 dev = pci_scan_single_device(bus, 0);
412 pci_bus_assign_resources(bus);
413 if (pci_bus_add_device(dev))
414 pr_err("Unable to hotplug wifi\n");
417 dev = pci_get_slot(bus, 0);
419 pci_remove_bus_device(dev);
426 mutex_unlock(&asus->hotplug_lock);
429 static void asus_rfkill_notify(acpi_handle handle, u32 event, void *data)
431 struct asus_wmi *asus = data;
433 if (event != ACPI_NOTIFY_BUS_CHECK)
437 * We can't call directly asus_rfkill_hotplug because most
438 * of the time WMBC is still being executed and not reetrant.
439 * There is currently no way to tell ACPICA that we want this
440 * method to be serialized, we schedule a asus_rfkill_hotplug
441 * call later, in a safer context.
443 queue_work(asus->hotplug_workqueue, &asus->hotplug_work);
446 static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
451 status = acpi_get_handle(NULL, node, &handle);
453 if (ACPI_SUCCESS(status)) {
454 status = acpi_install_notify_handler(handle,
456 asus_rfkill_notify, asus);
457 if (ACPI_FAILURE(status))
458 pr_warning("Failed to register notify on %s\n", node);
465 static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
467 acpi_status status = AE_OK;
470 status = acpi_get_handle(NULL, node, &handle);
472 if (ACPI_SUCCESS(status)) {
473 status = acpi_remove_notify_handler(handle,
476 if (ACPI_FAILURE(status))
477 pr_err("Error removing rfkill notify handler %s\n",
482 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,
485 int result = asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_WLAN);
494 static void asus_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
496 kfree(hotplug_slot->info);
500 static struct hotplug_slot_ops asus_hotplug_slot_ops = {
501 .owner = THIS_MODULE,
502 .get_adapter_status = asus_get_adapter_status,
503 .get_power_status = asus_get_adapter_status,
506 static void asus_hotplug_work(struct work_struct *work)
508 struct asus_wmi *asus;
510 asus = container_of(work, struct asus_wmi, hotplug_work);
511 asus_rfkill_hotplug(asus);
514 static int asus_setup_pci_hotplug(struct asus_wmi *asus)
517 struct pci_bus *bus = pci_find_bus(0, 1);
520 pr_err("Unable to find wifi PCI bus\n");
524 asus->hotplug_workqueue =
525 create_singlethread_workqueue("hotplug_workqueue");
526 if (!asus->hotplug_workqueue)
527 goto error_workqueue;
529 INIT_WORK(&asus->hotplug_work, asus_hotplug_work);
531 asus->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
532 if (!asus->hotplug_slot)
535 asus->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
537 if (!asus->hotplug_slot->info)
540 asus->hotplug_slot->private = asus;
541 asus->hotplug_slot->release = &asus_cleanup_pci_hotplug;
542 asus->hotplug_slot->ops = &asus_hotplug_slot_ops;
543 asus_get_adapter_status(asus->hotplug_slot,
544 &asus->hotplug_slot->info->adapter_status);
546 ret = pci_hp_register(asus->hotplug_slot, bus, 0, "asus-wifi");
548 pr_err("Unable to register hotplug slot - %d\n", ret);
555 kfree(asus->hotplug_slot->info);
557 kfree(asus->hotplug_slot);
558 asus->hotplug_slot = NULL;
560 destroy_workqueue(asus->hotplug_workqueue);
568 static int asus_rfkill_set(void *data, bool blocked)
570 struct asus_rfkill *priv = data;
571 u32 ctrl_param = !blocked;
573 return asus_wmi_set_devstate(priv->dev_id, ctrl_param, NULL);
576 static void asus_rfkill_query(struct rfkill *rfkill, void *data)
578 struct asus_rfkill *priv = data;
581 result = asus_wmi_get_devstate_simple(priv->dev_id);
586 rfkill_set_sw_state(priv->rfkill, !result);
589 static int asus_rfkill_wlan_set(void *data, bool blocked)
591 struct asus_rfkill *priv = data;
592 struct asus_wmi *asus = priv->asus;
596 * This handler is enabled only if hotplug is enabled.
597 * In this case, the asus_wmi_set_devstate() will
598 * trigger a wmi notification and we need to wait
599 * this call to finish before being able to call
602 mutex_lock(&asus->wmi_lock);
603 ret = asus_rfkill_set(data, blocked);
604 mutex_unlock(&asus->wmi_lock);
608 static const struct rfkill_ops asus_rfkill_wlan_ops = {
609 .set_block = asus_rfkill_wlan_set,
610 .query = asus_rfkill_query,
613 static const struct rfkill_ops asus_rfkill_ops = {
614 .set_block = asus_rfkill_set,
615 .query = asus_rfkill_query,
618 static int asus_new_rfkill(struct asus_wmi *asus,
619 struct asus_rfkill *arfkill,
620 const char *name, enum rfkill_type type, int dev_id)
622 int result = asus_wmi_get_devstate_simple(dev_id);
623 struct rfkill **rfkill = &arfkill->rfkill;
628 arfkill->dev_id = dev_id;
629 arfkill->asus = asus;
631 if (dev_id == ASUS_WMI_DEVID_WLAN && asus->driver->hotplug_wireless)
632 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
633 &asus_rfkill_wlan_ops, arfkill);
635 *rfkill = rfkill_alloc(name, &asus->platform_device->dev, type,
636 &asus_rfkill_ops, arfkill);
641 rfkill_init_sw_state(*rfkill, !result);
642 result = rfkill_register(*rfkill);
644 rfkill_destroy(*rfkill);
651 static void asus_wmi_rfkill_exit(struct asus_wmi *asus)
653 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
654 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
655 asus_unregister_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
656 if (asus->wlan.rfkill) {
657 rfkill_unregister(asus->wlan.rfkill);
658 rfkill_destroy(asus->wlan.rfkill);
659 asus->wlan.rfkill = NULL;
662 * Refresh pci hotplug in case the rfkill state was changed after
663 * asus_unregister_rfkill_notifier()
665 asus_rfkill_hotplug(asus);
666 if (asus->hotplug_slot)
667 pci_hp_deregister(asus->hotplug_slot);
668 if (asus->hotplug_workqueue)
669 destroy_workqueue(asus->hotplug_workqueue);
671 if (asus->bluetooth.rfkill) {
672 rfkill_unregister(asus->bluetooth.rfkill);
673 rfkill_destroy(asus->bluetooth.rfkill);
674 asus->bluetooth.rfkill = NULL;
676 if (asus->wimax.rfkill) {
677 rfkill_unregister(asus->wimax.rfkill);
678 rfkill_destroy(asus->wimax.rfkill);
679 asus->wimax.rfkill = NULL;
681 if (asus->wwan3g.rfkill) {
682 rfkill_unregister(asus->wwan3g.rfkill);
683 rfkill_destroy(asus->wwan3g.rfkill);
684 asus->wwan3g.rfkill = NULL;
688 static int asus_wmi_rfkill_init(struct asus_wmi *asus)
692 mutex_init(&asus->hotplug_lock);
693 mutex_init(&asus->wmi_lock);
695 result = asus_new_rfkill(asus, &asus->wlan, "asus-wlan",
696 RFKILL_TYPE_WLAN, ASUS_WMI_DEVID_WLAN);
698 if (result && result != -ENODEV)
701 result = asus_new_rfkill(asus, &asus->bluetooth,
702 "asus-bluetooth", RFKILL_TYPE_BLUETOOTH,
703 ASUS_WMI_DEVID_BLUETOOTH);
705 if (result && result != -ENODEV)
708 result = asus_new_rfkill(asus, &asus->wimax, "asus-wimax",
709 RFKILL_TYPE_WIMAX, ASUS_WMI_DEVID_WIMAX);
711 if (result && result != -ENODEV)
714 result = asus_new_rfkill(asus, &asus->wwan3g, "asus-wwan3g",
715 RFKILL_TYPE_WWAN, ASUS_WMI_DEVID_WWAN3G);
717 if (result && result != -ENODEV)
720 if (!asus->driver->hotplug_wireless)
723 result = asus_setup_pci_hotplug(asus);
725 * If we get -EBUSY then something else is handling the PCI hotplug -
726 * don't fail in this case
728 if (result == -EBUSY)
731 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P5");
732 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P6");
733 asus_register_rfkill_notifier(asus, "\\_SB.PCI0.P0P7");
735 * Refresh pci hotplug in case the rfkill state was changed during
738 asus_rfkill_hotplug(asus);
741 if (result && result != -ENODEV)
742 asus_wmi_rfkill_exit(asus);
744 if (result == -ENODEV)
753 static int read_backlight_power(void)
755 int ret = asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_BACKLIGHT);
760 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
763 static int read_brightness(struct backlight_device *bd)
768 err = asus_wmi_get_devstate(ASUS_WMI_DEVID_BRIGHTNESS, &retval);
773 return retval & ASUS_WMI_DSTS_BRIGHTNESS_MASK;
776 static int update_bl_status(struct backlight_device *bd)
781 ctrl_param = bd->props.brightness;
783 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BRIGHTNESS,
789 power = read_backlight_power();
790 if (power != -ENODEV && bd->props.power != power) {
791 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
792 err = asus_wmi_set_devstate(ASUS_WMI_DEVID_BACKLIGHT,
798 static const struct backlight_ops asus_wmi_bl_ops = {
799 .get_brightness = read_brightness,
800 .update_status = update_bl_status,
803 static int asus_wmi_backlight_notify(struct asus_wmi *asus, int code)
805 struct backlight_device *bd = asus->backlight_device;
806 int old = bd->props.brightness;
809 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
810 new = code - NOTIFY_BRNUP_MIN + 1;
811 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
812 new = code - NOTIFY_BRNDOWN_MIN;
814 bd->props.brightness = new;
815 backlight_update_status(bd);
816 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
821 static int asus_wmi_backlight_init(struct asus_wmi *asus)
823 struct backlight_device *bd;
824 struct backlight_properties props;
828 max = asus_wmi_get_devstate_bits(ASUS_WMI_DEVID_BRIGHTNESS,
829 ASUS_WMI_DSTS_MAX_BRIGTH_MASK);
830 power = read_backlight_power();
832 if (max < 0 && power < 0) {
833 /* Try to keep the original error */
834 if (max == -ENODEV && power == -ENODEV)
843 if (power == -ENODEV)
844 power = FB_BLANK_UNBLANK;
846 memset(&props, 0, sizeof(struct backlight_properties));
847 props.max_brightness = max;
848 bd = backlight_device_register(asus->driver->name,
849 &asus->platform_device->dev, asus,
850 &asus_wmi_bl_ops, &props);
852 pr_err("Could not register backlight device\n");
856 asus->backlight_device = bd;
858 bd->props.brightness = read_brightness(bd);
859 bd->props.power = power;
860 backlight_update_status(bd);
865 static void asus_wmi_backlight_exit(struct asus_wmi *asus)
867 if (asus->backlight_device)
868 backlight_device_unregister(asus->backlight_device);
870 asus->backlight_device = NULL;
873 static void asus_wmi_notify(u32 value, void *context)
875 struct asus_wmi *asus = context;
876 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
877 union acpi_object *obj;
882 status = wmi_get_event_data(value, &response);
883 if (status != AE_OK) {
884 pr_err("bad event status 0x%x\n", status);
888 obj = (union acpi_object *)response.pointer;
890 if (!obj || obj->type != ACPI_TYPE_INTEGER)
893 code = obj->integer.value;
896 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
897 code = NOTIFY_BRNUP_MIN;
898 else if (code >= NOTIFY_BRNDOWN_MIN &&
899 code <= NOTIFY_BRNDOWN_MAX)
900 code = NOTIFY_BRNDOWN_MIN;
902 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
903 if (!acpi_video_backlight_support())
904 asus_wmi_backlight_notify(asus, orig_code);
905 } else if (!sparse_keymap_report_event(asus->inputdev, code, 1, true))
906 pr_info("Unknown key %x pressed\n", code);
915 static int parse_arg(const char *buf, unsigned long count, int *val)
919 if (sscanf(buf, "%i", val) != 1)
924 static ssize_t store_sys_wmi(int devid, const char *buf, size_t count)
929 value = asus_wmi_get_devstate_simple(devid);
930 if (value == -ENODEV) /* Check device presence */
933 rv = parse_arg(buf, count, &value);
934 err = asus_wmi_set_devstate(devid, value, &retval);
942 static ssize_t show_sys_wmi(int devid, char *buf)
944 int value = asus_wmi_get_devstate_simple(devid);
949 return sprintf(buf, "%d\n", value);
952 #define ASUS_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
953 static ssize_t show_##_name(struct device *dev, \
954 struct device_attribute *attr, \
957 return show_sys_wmi(_cm, buf); \
959 static ssize_t store_##_name(struct device *dev, \
960 struct device_attribute *attr, \
961 const char *buf, size_t count) \
963 return store_sys_wmi(_cm, buf, count); \
965 static struct device_attribute dev_attr_##_name = { \
967 .name = __stringify(_name), \
969 .show = show_##_name, \
970 .store = store_##_name, \
973 ASUS_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, ASUS_WMI_DEVID_TOUCHPAD);
974 ASUS_WMI_CREATE_DEVICE_ATTR(camera, 0644, ASUS_WMI_DEVID_CAMERA);
975 ASUS_WMI_CREATE_DEVICE_ATTR(cardr, 0644, ASUS_WMI_DEVID_CARDREADER);
977 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
978 const char *buf, size_t count)
982 if (!count || sscanf(buf, "%i", &value) != 1)
984 if (value < 0 || value > 2)
987 return asus_wmi_evaluate_method(ASUS_WMI_METHODID_CFVS, value, 0, NULL);
990 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
992 static struct attribute *platform_attributes[] = {
993 &dev_attr_cpufv.attr,
994 &dev_attr_camera.attr,
995 &dev_attr_cardr.attr,
996 &dev_attr_touchpad.attr,
1000 static mode_t asus_sysfs_is_visible(struct kobject *kobj,
1001 struct attribute *attr, int idx)
1003 bool supported = true;
1006 if (attr == &dev_attr_camera.attr)
1007 devid = ASUS_WMI_DEVID_CAMERA;
1008 else if (attr == &dev_attr_cardr.attr)
1009 devid = ASUS_WMI_DEVID_CARDREADER;
1010 else if (attr == &dev_attr_touchpad.attr)
1011 devid = ASUS_WMI_DEVID_TOUCHPAD;
1014 supported = asus_wmi_get_devstate_simple(devid) != -ENODEV;
1016 return supported ? attr->mode : 0;
1019 static struct attribute_group platform_attribute_group = {
1020 .is_visible = asus_sysfs_is_visible,
1021 .attrs = platform_attributes
1024 static void asus_wmi_sysfs_exit(struct platform_device *device)
1026 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1029 static int asus_wmi_sysfs_init(struct platform_device *device)
1031 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1037 static int __init asus_wmi_platform_init(struct asus_wmi *asus)
1039 return asus_wmi_sysfs_init(asus->platform_device);
1042 static void asus_wmi_platform_exit(struct asus_wmi *asus)
1044 asus_wmi_sysfs_exit(asus->platform_device);
1050 struct asus_wmi_debugfs_node {
1051 struct asus_wmi *asus;
1053 int (*show) (struct seq_file *m, void *data);
1056 static int show_dsts(struct seq_file *m, void *data)
1058 struct asus_wmi *asus = m->private;
1062 err = asus_wmi_get_devstate(asus->debug.dev_id, &retval);
1067 seq_printf(m, "DSTS(%x) = %x\n", asus->debug.dev_id, retval);
1072 static int show_devs(struct seq_file *m, void *data)
1074 struct asus_wmi *asus = m->private;
1078 err = asus_wmi_set_devstate(asus->debug.dev_id, asus->debug.ctrl_param,
1084 seq_printf(m, "DEVS(%x, %x) = %x\n", asus->debug.dev_id,
1085 asus->debug.ctrl_param, retval);
1090 static struct asus_wmi_debugfs_node asus_wmi_debug_files[] = {
1091 {NULL, "devs", show_devs},
1092 {NULL, "dsts", show_dsts},
1095 static int asus_wmi_debugfs_open(struct inode *inode, struct file *file)
1097 struct asus_wmi_debugfs_node *node = inode->i_private;
1099 return single_open(file, node->show, node->asus);
1102 static const struct file_operations asus_wmi_debugfs_io_ops = {
1103 .owner = THIS_MODULE,
1104 .open = asus_wmi_debugfs_open,
1106 .llseek = seq_lseek,
1107 .release = single_release,
1110 static void asus_wmi_debugfs_exit(struct asus_wmi *asus)
1112 debugfs_remove_recursive(asus->debug.root);
1115 static int asus_wmi_debugfs_init(struct asus_wmi *asus)
1117 struct dentry *dent;
1120 asus->debug.root = debugfs_create_dir(asus->driver->name, NULL);
1121 if (!asus->debug.root) {
1122 pr_err("failed to create debugfs directory");
1126 dent = debugfs_create_x32("dev_id", S_IRUGO | S_IWUSR,
1127 asus->debug.root, &asus->debug.dev_id);
1131 dent = debugfs_create_x32("ctrl_param", S_IRUGO | S_IWUSR,
1132 asus->debug.root, &asus->debug.ctrl_param);
1136 for (i = 0; i < ARRAY_SIZE(asus_wmi_debug_files); i++) {
1137 struct asus_wmi_debugfs_node *node = &asus_wmi_debug_files[i];
1140 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1141 asus->debug.root, node,
1142 &asus_wmi_debugfs_io_ops);
1144 pr_err("failed to create debug file: %s\n", node->name);
1152 asus_wmi_debugfs_exit(asus);
1159 static int asus_wmi_add(struct platform_device *pdev)
1161 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1162 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1163 struct asus_wmi *asus;
1167 asus = kzalloc(sizeof(struct asus_wmi), GFP_KERNEL);
1171 asus->driver = wdrv;
1172 asus->platform_device = pdev;
1173 wdrv->platform_device = pdev;
1174 platform_set_drvdata(asus->platform_device, asus);
1177 wdrv->quirks(asus->driver);
1179 err = asus_wmi_platform_init(asus);
1183 err = asus_wmi_input_init(asus);
1187 err = asus_wmi_led_init(asus);
1191 err = asus_wmi_rfkill_init(asus);
1195 if (!acpi_video_backlight_support()) {
1196 err = asus_wmi_backlight_init(asus);
1197 if (err && err != -ENODEV)
1198 goto fail_backlight;
1200 pr_info("Backlight controlled by ACPI video driver\n");
1202 status = wmi_install_notify_handler(asus->driver->event_guid,
1203 asus_wmi_notify, asus);
1204 if (ACPI_FAILURE(status)) {
1205 pr_err("Unable to register notify handler - %d\n", status);
1207 goto fail_wmi_handler;
1210 err = asus_wmi_debugfs_init(asus);
1217 wmi_remove_notify_handler(asus->driver->event_guid);
1219 asus_wmi_backlight_exit(asus);
1221 asus_wmi_rfkill_exit(asus);
1223 asus_wmi_led_exit(asus);
1225 asus_wmi_input_exit(asus);
1227 asus_wmi_platform_exit(asus);
1233 static int asus_wmi_remove(struct platform_device *device)
1235 struct asus_wmi *asus;
1237 asus = platform_get_drvdata(device);
1238 wmi_remove_notify_handler(asus->driver->event_guid);
1239 asus_wmi_backlight_exit(asus);
1240 asus_wmi_input_exit(asus);
1241 asus_wmi_led_exit(asus);
1242 asus_wmi_rfkill_exit(asus);
1243 asus_wmi_debugfs_exit(asus);
1244 asus_wmi_platform_exit(asus);
1251 * Platform driver - hibernate/resume callbacks
1253 static int asus_hotk_thaw(struct device *device)
1255 struct asus_wmi *asus = dev_get_drvdata(device);
1257 if (asus->wlan.rfkill) {
1261 * Work around bios bug - acpi _PTS turns off the wireless led
1262 * during suspend. Normally it restores it on resume, but
1263 * we should kick it ourselves in case hibernation is aborted.
1265 wlan = asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_WLAN);
1266 asus_wmi_set_devstate(ASUS_WMI_DEVID_WLAN, wlan, NULL);
1272 static int asus_hotk_restore(struct device *device)
1274 struct asus_wmi *asus = dev_get_drvdata(device);
1277 /* Refresh both wlan rfkill state and pci hotplug */
1278 if (asus->wlan.rfkill)
1279 asus_rfkill_hotplug(asus);
1281 if (asus->bluetooth.rfkill) {
1282 bl = !asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_BLUETOOTH);
1283 rfkill_set_sw_state(asus->bluetooth.rfkill, bl);
1285 if (asus->wimax.rfkill) {
1286 bl = !asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_WIMAX);
1287 rfkill_set_sw_state(asus->wimax.rfkill, bl);
1289 if (asus->wwan3g.rfkill) {
1290 bl = !asus_wmi_get_devstate_simple(ASUS_WMI_DEVID_WWAN3G);
1291 rfkill_set_sw_state(asus->wwan3g.rfkill, bl);
1297 static const struct dev_pm_ops asus_pm_ops = {
1298 .thaw = asus_hotk_thaw,
1299 .restore = asus_hotk_restore,
1302 static int asus_wmi_probe(struct platform_device *pdev)
1304 struct platform_driver *pdrv = to_platform_driver(pdev->dev.driver);
1305 struct asus_wmi_driver *wdrv = to_asus_wmi_driver(pdrv);
1308 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1309 pr_warning("Management GUID not found\n");
1313 if (wdrv->event_guid && !wmi_has_guid(wdrv->event_guid)) {
1314 pr_warning("Event GUID not found\n");
1319 ret = wdrv->probe(pdev);
1324 return asus_wmi_add(pdev);
1329 int asus_wmi_register_driver(struct asus_wmi_driver *driver)
1331 struct platform_driver *platform_driver;
1332 struct platform_device *platform_device;
1337 platform_driver = &driver->platform_driver;
1338 platform_driver->remove = asus_wmi_remove;
1339 platform_driver->driver.owner = driver->owner;
1340 platform_driver->driver.name = driver->name;
1341 platform_driver->driver.pm = &asus_pm_ops;
1343 platform_device = platform_create_bundle(platform_driver,
1346 if (IS_ERR(platform_device))
1347 return PTR_ERR(platform_device);
1352 EXPORT_SYMBOL_GPL(asus_wmi_register_driver);
1354 void asus_wmi_unregister_driver(struct asus_wmi_driver *driver)
1356 platform_device_unregister(driver->platform_device);
1357 platform_driver_unregister(&driver->platform_driver);
1360 EXPORT_SYMBOL_GPL(asus_wmi_unregister_driver);
1362 static int __init asus_wmi_init(void)
1364 if (!wmi_has_guid(ASUS_WMI_MGMT_GUID)) {
1365 pr_info("Asus Management GUID not found");
1369 pr_info("ASUS WMI generic driver loaded");
1373 static void __exit asus_wmi_exit(void)
1375 pr_info("ASUS WMI generic driver unloaded");
1378 module_init(asus_wmi_init);
1379 module_exit(asus_wmi_exit);