2 * Eee PC WMI hotkey driver
4 * Copyright(C) 2010 Intel Corporation.
5 * Copyright(C) 2010 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 <linux/dmi.h>
46 #include <acpi/acpi_bus.h>
47 #include <acpi/acpi_drivers.h>
49 #define EEEPC_WMI_FILE "eeepc-wmi"
51 MODULE_AUTHOR("Yong Wang <yong.y.wang@intel.com>");
52 MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
53 MODULE_LICENSE("GPL");
55 #define EEEPC_ACPI_HID "ASUS010" /* old _HID used in eeepc-laptop */
57 #define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000"
58 #define EEEPC_WMI_MGMT_GUID "97845ED0-4E6D-11DE-8A39-0800200C9A66"
60 MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
61 MODULE_ALIAS("wmi:"EEEPC_WMI_MGMT_GUID);
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 EEEPC_WMI_METHODID_DSTS 0x53544344
70 #define EEEPC_WMI_METHODID_DEVS 0x53564544
71 #define EEEPC_WMI_METHODID_CFVS 0x53564643
74 #define EEEPC_WMI_DEVID_WLAN 0x00010011
75 #define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013
76 #define EEEPC_WMI_DEVID_WIMAX 0x00010017
77 #define EEEPC_WMI_DEVID_WWAN3G 0x00010019
79 /* Backlight and Brightness */
80 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050011
81 #define EEEPC_WMI_DEVID_BRIGHTNESS 0x00050012
84 #define EEEPC_WMI_DEVID_CAMERA 0x00060013
87 #define EEEPC_WMI_DEVID_CARDREADER 0x00080013
90 #define EEEPC_WMI_DEVID_TOUCHPAD 0x00100011
91 #define EEEPC_WMI_DEVID_TOUCHPAD_LED 0x00100012
94 #define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001
95 #define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000
96 #define EEEPC_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
97 #define EEEPC_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
99 static bool hotplug_wireless;
101 module_param(hotplug_wireless, bool, 0444);
102 MODULE_PARM_DESC(hotplug_wireless,
103 "Enable hotplug for wireless device. "
104 "If your laptop needs that, please report to "
105 "acpi4asus-user@lists.sourceforge.net.");
107 static const struct key_entry eeepc_wmi_keymap[] = {
108 /* Sleep already handled via generic ACPI code */
109 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
110 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
111 { KE_KEY, 0x30, { KEY_VOLUMEUP } },
112 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
113 { KE_KEY, 0x32, { KEY_MUTE } },
114 { KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
115 { KE_KEY, 0x5d, { KEY_WLAN } },
116 { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */
117 { KE_KEY, 0x82, { KEY_CAMERA } },
118 { KE_KEY, 0x83, { KEY_CAMERA_ZOOMIN } },
119 { KE_KEY, 0x88, { KEY_WLAN } },
120 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
121 { KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
122 { KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
123 { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } },
124 { KE_KEY, 0xeb, { KEY_CAMERA_ZOOMOUT } },
125 { KE_KEY, 0xec, { KEY_CAMERA_UP } },
126 { KE_KEY, 0xed, { KEY_CAMERA_DOWN } },
127 { KE_KEY, 0xee, { KEY_CAMERA_LEFT } },
128 { KE_KEY, 0xef, { KEY_CAMERA_RIGHT } },
138 * eeepc-wmi/ - debugfs root directory
139 * dev_id - current dev_id
140 * ctrl_param - current ctrl_param
141 * devs - call DEVS(dev_id, ctrl_param) and print result
142 * dsts - call DSTS(dev_id) and print result
144 struct eeepc_wmi_debug {
151 bool hotplug_wireless;
153 struct input_dev *inputdev;
154 struct backlight_device *backlight_device;
155 struct platform_device *platform_device;
157 struct led_classdev tpd_led;
159 struct workqueue_struct *led_workqueue;
160 struct work_struct tpd_led_work;
162 struct rfkill *wlan_rfkill;
163 struct rfkill *bluetooth_rfkill;
164 struct rfkill *wimax_rfkill;
165 struct rfkill *wwan3g_rfkill;
167 struct hotplug_slot *hotplug_slot;
168 struct mutex hotplug_lock;
169 struct mutex wmi_lock;
170 struct workqueue_struct *hotplug_workqueue;
171 struct work_struct hotplug_work;
173 struct eeepc_wmi_debug debug;
176 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
180 eeepc->inputdev = input_allocate_device();
181 if (!eeepc->inputdev)
184 eeepc->inputdev->name = "Eee PC WMI hotkeys";
185 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0";
186 eeepc->inputdev->id.bustype = BUS_HOST;
187 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev;
189 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL);
193 err = input_register_device(eeepc->inputdev);
195 goto err_free_keymap;
200 sparse_keymap_free(eeepc->inputdev);
202 input_free_device(eeepc->inputdev);
206 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc)
208 if (eeepc->inputdev) {
209 sparse_keymap_free(eeepc->inputdev);
210 input_unregister_device(eeepc->inputdev);
213 eeepc->inputdev = NULL;
216 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval)
218 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id };
219 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
220 union acpi_object *obj;
224 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
225 1, EEEPC_WMI_METHODID_DSTS,
228 if (ACPI_FAILURE(status))
231 obj = (union acpi_object *)output.pointer;
232 if (obj && obj->type == ACPI_TYPE_INTEGER)
233 tmp = (u32)obj->integer.value;
246 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
249 struct bios_args args = {
251 .ctrl_param = ctrl_param,
253 struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
257 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
258 EEEPC_WMI_METHODID_DEVS,
261 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
262 union acpi_object *obj;
265 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
266 EEEPC_WMI_METHODID_DEVS,
269 if (ACPI_FAILURE(status))
272 obj = (union acpi_object *)output.pointer;
273 if (obj && obj->type == ACPI_TYPE_INTEGER)
274 tmp = (u32)obj->integer.value;
286 /* Helper for special devices with magic return codes */
287 static int eeepc_wmi_get_devstate_bits(u32 dev_id, u32 mask)
292 status = eeepc_wmi_get_devstate(dev_id, &retval);
294 if (ACPI_FAILURE(status))
297 if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT))
300 return retval & mask;
303 static int eeepc_wmi_get_devstate_simple(u32 dev_id)
305 return eeepc_wmi_get_devstate_bits(dev_id, EEEPC_WMI_DSTS_STATUS_BIT);
312 * These functions actually update the LED's, and are called from a
313 * workqueue. By doing this as separate work rather than when the LED
314 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a
315 * potentially bad time, such as a timer interrupt.
317 static void tpd_led_update(struct work_struct *work)
320 struct eeepc_wmi *eeepc;
322 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work);
324 ctrl_param = eeepc->tpd_led_wk;
325 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TOUCHPAD_LED, ctrl_param, NULL);
328 static void tpd_led_set(struct led_classdev *led_cdev,
329 enum led_brightness value)
331 struct eeepc_wmi *eeepc;
333 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
335 eeepc->tpd_led_wk = !!value;
336 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
339 static int read_tpd_led_state(struct eeepc_wmi *eeepc)
341 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TOUCHPAD_LED);
344 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
346 struct eeepc_wmi *eeepc;
348 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
350 return read_tpd_led_state(eeepc);
353 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc)
357 if (read_tpd_led_state(eeepc) < 0)
360 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
361 if (!eeepc->led_workqueue)
363 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
365 eeepc->tpd_led.name = "eeepc::touchpad";
366 eeepc->tpd_led.brightness_set = tpd_led_set;
367 eeepc->tpd_led.brightness_get = tpd_led_get;
368 eeepc->tpd_led.max_brightness = 1;
370 rv = led_classdev_register(&eeepc->platform_device->dev,
373 destroy_workqueue(eeepc->led_workqueue);
380 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
382 if (eeepc->tpd_led.dev)
383 led_classdev_unregister(&eeepc->tpd_led);
384 if (eeepc->led_workqueue)
385 destroy_workqueue(eeepc->led_workqueue);
389 * PCI hotplug (for wlan rfkill)
391 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc)
393 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
400 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc)
408 mutex_lock(&eeepc->wmi_lock);
409 blocked = eeepc_wlan_rfkill_blocked(eeepc);
410 mutex_unlock(&eeepc->wmi_lock);
412 mutex_lock(&eeepc->hotplug_lock);
414 if (eeepc->wlan_rfkill)
415 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
417 if (eeepc->hotplug_slot) {
418 bus = pci_find_bus(0, 1);
420 pr_warning("Unable to find PCI bus 1?\n");
424 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
425 pr_err("Unable to read PCI config space?\n");
428 absent = (l == 0xffffffff);
430 if (blocked != absent) {
431 pr_warning("BIOS says wireless lan is %s, "
432 "but the pci device is %s\n",
433 blocked ? "blocked" : "unblocked",
434 absent ? "absent" : "present");
435 pr_warning("skipped wireless hotplug as probably "
436 "inappropriate for this model\n");
441 dev = pci_get_slot(bus, 0);
443 /* Device already present */
447 dev = pci_scan_single_device(bus, 0);
449 pci_bus_assign_resources(bus);
450 if (pci_bus_add_device(dev))
451 pr_err("Unable to hotplug wifi\n");
454 dev = pci_get_slot(bus, 0);
456 pci_remove_bus_device(dev);
463 mutex_unlock(&eeepc->hotplug_lock);
466 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
468 struct eeepc_wmi *eeepc = data;
470 if (event != ACPI_NOTIFY_BUS_CHECK)
474 * We can't call directly eeepc_rfkill_hotplug because most
475 * of the time WMBC is still being executed and not reetrant.
476 * There is currently no way to tell ACPICA that we want this
477 * method to be serialized, we schedule a eeepc_rfkill_hotplug
478 * call later, in a safer context.
480 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work);
483 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc,
489 status = acpi_get_handle(NULL, node, &handle);
491 if (ACPI_SUCCESS(status)) {
492 status = acpi_install_notify_handler(handle,
496 if (ACPI_FAILURE(status))
497 pr_warning("Failed to register notify on %s\n", node);
504 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc,
507 acpi_status status = AE_OK;
510 status = acpi_get_handle(NULL, node, &handle);
512 if (ACPI_SUCCESS(status)) {
513 status = acpi_remove_notify_handler(handle,
515 eeepc_rfkill_notify);
516 if (ACPI_FAILURE(status))
517 pr_err("Error removing rfkill notify handler %s\n",
522 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
525 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
534 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
536 kfree(hotplug_slot->info);
540 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
541 .owner = THIS_MODULE,
542 .get_adapter_status = eeepc_get_adapter_status,
543 .get_power_status = eeepc_get_adapter_status,
546 static void eeepc_hotplug_work(struct work_struct *work)
548 struct eeepc_wmi *eeepc;
550 eeepc = container_of(work, struct eeepc_wmi, hotplug_work);
551 eeepc_rfkill_hotplug(eeepc);
554 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc)
557 struct pci_bus *bus = pci_find_bus(0, 1);
560 pr_err("Unable to find wifi PCI bus\n");
564 eeepc->hotplug_workqueue =
565 create_singlethread_workqueue("hotplug_workqueue");
566 if (!eeepc->hotplug_workqueue)
567 goto error_workqueue;
569 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work);
571 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
572 if (!eeepc->hotplug_slot)
575 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
577 if (!eeepc->hotplug_slot->info)
580 eeepc->hotplug_slot->private = eeepc;
581 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
582 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
583 eeepc_get_adapter_status(eeepc->hotplug_slot,
584 &eeepc->hotplug_slot->info->adapter_status);
586 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
588 pr_err("Unable to register hotplug slot - %d\n", ret);
595 kfree(eeepc->hotplug_slot->info);
597 kfree(eeepc->hotplug_slot);
598 eeepc->hotplug_slot = NULL;
600 destroy_workqueue(eeepc->hotplug_workqueue);
608 static int eeepc_rfkill_set(void *data, bool blocked)
610 int dev_id = (unsigned long)data;
611 u32 ctrl_param = !blocked;
614 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL);
616 if (ACPI_FAILURE(status))
622 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
624 int dev_id = (unsigned long)data;
627 result = eeepc_wmi_get_devstate_simple(dev_id);
632 rfkill_set_sw_state(rfkill, !result);
635 static int eeepc_rfkill_wlan_set(void *data, bool blocked)
637 struct eeepc_wmi *eeepc = data;
641 * This handler is enabled only if hotplug is enabled.
642 * In this case, the eeepc_wmi_set_devstate() will
643 * trigger a wmi notification and we need to wait
644 * this call to finish before being able to call
647 mutex_lock(&eeepc->wmi_lock);
648 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked);
649 mutex_unlock(&eeepc->wmi_lock);
653 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data)
655 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN);
658 static const struct rfkill_ops eeepc_rfkill_wlan_ops = {
659 .set_block = eeepc_rfkill_wlan_set,
660 .query = eeepc_rfkill_wlan_query,
663 static const struct rfkill_ops eeepc_rfkill_ops = {
664 .set_block = eeepc_rfkill_set,
665 .query = eeepc_rfkill_query,
668 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
669 struct rfkill **rfkill,
671 enum rfkill_type type, int dev_id)
673 int result = eeepc_wmi_get_devstate_simple(dev_id);
678 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless)
679 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
680 &eeepc_rfkill_wlan_ops, eeepc);
682 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
683 &eeepc_rfkill_ops, (void *)(long)dev_id);
688 rfkill_init_sw_state(*rfkill, !result);
689 result = rfkill_register(*rfkill);
691 rfkill_destroy(*rfkill);
698 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
700 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
701 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
702 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
703 if (eeepc->wlan_rfkill) {
704 rfkill_unregister(eeepc->wlan_rfkill);
705 rfkill_destroy(eeepc->wlan_rfkill);
706 eeepc->wlan_rfkill = NULL;
709 * Refresh pci hotplug in case the rfkill state was changed after
710 * eeepc_unregister_rfkill_notifier()
712 eeepc_rfkill_hotplug(eeepc);
713 if (eeepc->hotplug_slot)
714 pci_hp_deregister(eeepc->hotplug_slot);
715 if (eeepc->hotplug_workqueue)
716 destroy_workqueue(eeepc->hotplug_workqueue);
718 if (eeepc->bluetooth_rfkill) {
719 rfkill_unregister(eeepc->bluetooth_rfkill);
720 rfkill_destroy(eeepc->bluetooth_rfkill);
721 eeepc->bluetooth_rfkill = NULL;
723 if (eeepc->wimax_rfkill) {
724 rfkill_unregister(eeepc->wimax_rfkill);
725 rfkill_destroy(eeepc->wimax_rfkill);
726 eeepc->wimax_rfkill = NULL;
728 if (eeepc->wwan3g_rfkill) {
729 rfkill_unregister(eeepc->wwan3g_rfkill);
730 rfkill_destroy(eeepc->wwan3g_rfkill);
731 eeepc->wwan3g_rfkill = NULL;
735 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
739 mutex_init(&eeepc->hotplug_lock);
740 mutex_init(&eeepc->wmi_lock);
742 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
743 "eeepc-wlan", RFKILL_TYPE_WLAN,
744 EEEPC_WMI_DEVID_WLAN);
746 if (result && result != -ENODEV)
749 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
750 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
751 EEEPC_WMI_DEVID_BLUETOOTH);
753 if (result && result != -ENODEV)
756 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
757 "eeepc-wimax", RFKILL_TYPE_WIMAX,
758 EEEPC_WMI_DEVID_WIMAX);
760 if (result && result != -ENODEV)
763 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
764 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
765 EEEPC_WMI_DEVID_WWAN3G);
767 if (result && result != -ENODEV)
770 if (!eeepc->hotplug_wireless)
773 result = eeepc_setup_pci_hotplug(eeepc);
775 * If we get -EBUSY then something else is handling the PCI hotplug -
776 * don't fail in this case
778 if (result == -EBUSY)
781 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
782 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
783 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
785 * Refresh pci hotplug in case the rfkill state was changed during
788 eeepc_rfkill_hotplug(eeepc);
791 if (result && result != -ENODEV)
792 eeepc_wmi_rfkill_exit(eeepc);
794 if (result == -ENODEV)
803 static int read_backlight_power(void)
805 int ret = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BACKLIGHT);
810 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
813 static int read_brightness(struct backlight_device *bd)
818 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, &retval);
820 if (ACPI_FAILURE(status))
823 return retval & EEEPC_WMI_DSTS_BRIGHTNESS_MASK;
826 static int update_bl_status(struct backlight_device *bd)
832 ctrl_param = bd->props.brightness;
834 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BRIGHTNESS,
837 if (ACPI_FAILURE(status))
840 power = read_backlight_power();
841 if (power != -ENODEV && bd->props.power != power) {
842 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
843 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT,
846 if (ACPI_FAILURE(status))
852 static const struct backlight_ops eeepc_wmi_bl_ops = {
853 .get_brightness = read_brightness,
854 .update_status = update_bl_status,
857 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code)
859 struct backlight_device *bd = eeepc->backlight_device;
860 int old = bd->props.brightness;
863 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
864 new = code - NOTIFY_BRNUP_MIN + 1;
865 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
866 new = code - NOTIFY_BRNDOWN_MIN;
868 bd->props.brightness = new;
869 backlight_update_status(bd);
870 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
875 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
877 struct backlight_device *bd;
878 struct backlight_properties props;
882 max = eeepc_wmi_get_devstate_bits(EEEPC_WMI_DEVID_BRIGHTNESS,
883 EEEPC_WMI_DSTS_MAX_BRIGTH_MASK);
884 power = read_backlight_power();
886 if (max < 0 && power < 0) {
887 /* Try to keep the original error */
888 if (max == -ENODEV && power == -ENODEV)
897 if (power == -ENODEV)
898 power = FB_BLANK_UNBLANK;
900 memset(&props, 0, sizeof(struct backlight_properties));
901 props.max_brightness = max;
902 bd = backlight_device_register(EEEPC_WMI_FILE,
903 &eeepc->platform_device->dev, eeepc,
904 &eeepc_wmi_bl_ops, &props);
906 pr_err("Could not register backlight device\n");
910 eeepc->backlight_device = bd;
912 bd->props.brightness = read_brightness(bd);
913 bd->props.power = power;
914 backlight_update_status(bd);
919 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc)
921 if (eeepc->backlight_device)
922 backlight_device_unregister(eeepc->backlight_device);
924 eeepc->backlight_device = NULL;
927 static void eeepc_wmi_notify(u32 value, void *context)
929 struct eeepc_wmi *eeepc = context;
930 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
931 union acpi_object *obj;
936 status = wmi_get_event_data(value, &response);
937 if (status != AE_OK) {
938 pr_err("bad event status 0x%x\n", status);
942 obj = (union acpi_object *)response.pointer;
944 if (obj && obj->type == ACPI_TYPE_INTEGER) {
945 code = obj->integer.value;
948 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
949 code = NOTIFY_BRNUP_MIN;
950 else if (code >= NOTIFY_BRNDOWN_MIN &&
951 code <= NOTIFY_BRNDOWN_MAX)
952 code = NOTIFY_BRNDOWN_MIN;
954 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
955 if (!acpi_video_backlight_support())
956 eeepc_wmi_backlight_notify(eeepc, orig_code);
959 if (!sparse_keymap_report_event(eeepc->inputdev,
961 pr_info("Unknown key %x pressed\n", code);
970 static int parse_arg(const char *buf, unsigned long count, int *val)
974 if (sscanf(buf, "%i", val) != 1)
979 static ssize_t store_sys_wmi(int devid, const char *buf, size_t count)
985 value = eeepc_wmi_get_devstate_simple(devid);
986 if (value == -ENODEV) /* Check device presence */
989 rv = parse_arg(buf, count, &value);
990 status = eeepc_wmi_set_devstate(devid, value, &retval);
992 if (ACPI_FAILURE(status))
997 static ssize_t show_sys_wmi(int devid, char *buf)
999 int value = eeepc_wmi_get_devstate_simple(devid);
1004 return sprintf(buf, "%d\n", value);
1007 #define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
1008 static ssize_t show_##_name(struct device *dev, \
1009 struct device_attribute *attr, \
1012 return show_sys_wmi(_cm, buf); \
1014 static ssize_t store_##_name(struct device *dev, \
1015 struct device_attribute *attr, \
1016 const char *buf, size_t count) \
1018 return store_sys_wmi(_cm, buf, count); \
1020 static struct device_attribute dev_attr_##_name = { \
1022 .name = __stringify(_name), \
1024 .show = show_##_name, \
1025 .store = store_##_name, \
1028 EEEPC_WMI_CREATE_DEVICE_ATTR(touchpad, 0644, EEEPC_WMI_DEVID_TOUCHPAD);
1029 EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA);
1030 EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER);
1032 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1033 const char *buf, size_t count)
1036 struct acpi_buffer input = { (acpi_size)sizeof(value), &value };
1039 if (!count || sscanf(buf, "%i", &value) != 1)
1041 if (value < 0 || value > 2)
1044 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
1045 1, EEEPC_WMI_METHODID_CFVS, &input, NULL);
1047 if (ACPI_FAILURE(status))
1053 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1055 static struct attribute *platform_attributes[] = {
1056 &dev_attr_cpufv.attr,
1057 &dev_attr_camera.attr,
1058 &dev_attr_cardr.attr,
1059 &dev_attr_touchpad.attr,
1063 static mode_t eeepc_sysfs_is_visible(struct kobject *kobj,
1064 struct attribute *attr,
1067 bool supported = true;
1070 if (attr == &dev_attr_camera.attr)
1071 devid = EEEPC_WMI_DEVID_CAMERA;
1072 else if (attr == &dev_attr_cardr.attr)
1073 devid = EEEPC_WMI_DEVID_CARDREADER;
1074 else if (attr == &dev_attr_touchpad.attr)
1075 devid = EEEPC_WMI_DEVID_TOUCHPAD;
1078 supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV;
1080 return supported ? attr->mode : 0;
1083 static struct attribute_group platform_attribute_group = {
1084 .is_visible = eeepc_sysfs_is_visible,
1085 .attrs = platform_attributes
1088 static void eeepc_wmi_sysfs_exit(struct platform_device *device)
1090 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1093 static int eeepc_wmi_sysfs_init(struct platform_device *device)
1095 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1101 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc)
1103 return eeepc_wmi_sysfs_init(eeepc->platform_device);
1106 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc)
1108 eeepc_wmi_sysfs_exit(eeepc->platform_device);
1114 struct eeepc_wmi_debugfs_node {
1115 struct eeepc_wmi *eeepc;
1117 int (*show)(struct seq_file *m, void *data);
1120 static int show_dsts(struct seq_file *m, void *data)
1122 struct eeepc_wmi *eeepc = m->private;
1126 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval);
1128 if (ACPI_FAILURE(status))
1131 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval);
1136 static int show_devs(struct seq_file *m, void *data)
1138 struct eeepc_wmi *eeepc = m->private;
1142 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id,
1143 eeepc->debug.ctrl_param, &retval);
1144 if (ACPI_FAILURE(status))
1147 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id,
1148 eeepc->debug.ctrl_param, retval);
1153 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = {
1154 { NULL, "devs", show_devs },
1155 { NULL, "dsts", show_dsts },
1158 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file)
1160 struct eeepc_wmi_debugfs_node *node = inode->i_private;
1162 return single_open(file, node->show, node->eeepc);
1165 static const struct file_operations eeepc_wmi_debugfs_io_ops = {
1166 .owner = THIS_MODULE,
1167 .open = eeepc_wmi_debugfs_open,
1169 .llseek = seq_lseek,
1170 .release = single_release,
1173 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc)
1175 debugfs_remove_recursive(eeepc->debug.root);
1178 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc)
1180 struct dentry *dent;
1183 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL);
1184 if (!eeepc->debug.root) {
1185 pr_err("failed to create debugfs directory");
1189 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR,
1190 eeepc->debug.root, &eeepc->debug.dev_id);
1194 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR,
1195 eeepc->debug.root, &eeepc->debug.ctrl_param);
1199 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) {
1200 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i];
1202 node->eeepc = eeepc;
1203 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1204 eeepc->debug.root, node,
1205 &eeepc_wmi_debugfs_io_ops);
1207 pr_err("failed to create debug file: %s\n", node->name);
1215 eeepc_wmi_debugfs_exit(eeepc);
1222 static void eeepc_dmi_check(struct eeepc_wmi *eeepc)
1226 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1231 * Whitelist for wlan hotplug
1233 * Eeepc 1000H needs the current hotplug code to handle
1234 * Fn+F2 correctly. We may add other Eeepc here later, but
1235 * it seems that most of the laptops supported by eeepc-wmi
1236 * don't need to be on this list
1238 if (strcmp(model, "1000H") == 0) {
1239 eeepc->hotplug_wireless = true;
1240 pr_info("wlan hotplug enabled\n");
1244 static int __init eeepc_wmi_add(struct platform_device *pdev)
1246 struct eeepc_wmi *eeepc;
1250 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
1254 eeepc->platform_device = pdev;
1255 platform_set_drvdata(eeepc->platform_device, eeepc);
1257 eeepc->hotplug_wireless = hotplug_wireless;
1258 eeepc_dmi_check(eeepc);
1260 err = eeepc_wmi_platform_init(eeepc);
1264 err = eeepc_wmi_input_init(eeepc);
1268 err = eeepc_wmi_led_init(eeepc);
1272 err = eeepc_wmi_rfkill_init(eeepc);
1276 if (!acpi_video_backlight_support()) {
1277 err = eeepc_wmi_backlight_init(eeepc);
1278 if (err && err != -ENODEV)
1279 goto fail_backlight;
1281 pr_info("Backlight controlled by ACPI video driver\n");
1283 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
1284 eeepc_wmi_notify, eeepc);
1285 if (ACPI_FAILURE(status)) {
1286 pr_err("Unable to register notify handler - %d\n",
1289 goto fail_wmi_handler;
1292 err = eeepc_wmi_debugfs_init(eeepc);
1299 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1301 eeepc_wmi_backlight_exit(eeepc);
1303 eeepc_wmi_rfkill_exit(eeepc);
1305 eeepc_wmi_led_exit(eeepc);
1307 eeepc_wmi_input_exit(eeepc);
1309 eeepc_wmi_platform_exit(eeepc);
1315 static int __exit eeepc_wmi_remove(struct platform_device *device)
1317 struct eeepc_wmi *eeepc;
1319 eeepc = platform_get_drvdata(device);
1320 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1321 eeepc_wmi_backlight_exit(eeepc);
1322 eeepc_wmi_input_exit(eeepc);
1323 eeepc_wmi_led_exit(eeepc);
1324 eeepc_wmi_rfkill_exit(eeepc);
1325 eeepc_wmi_debugfs_exit(eeepc);
1326 eeepc_wmi_platform_exit(eeepc);
1333 * Platform driver - hibernate/resume callbacks
1335 static int eeepc_hotk_thaw(struct device *device)
1337 struct eeepc_wmi *eeepc = dev_get_drvdata(device);
1339 if (eeepc->wlan_rfkill) {
1343 * Work around bios bug - acpi _PTS turns off the wireless led
1344 * during suspend. Normally it restores it on resume, but
1345 * we should kick it ourselves in case hibernation is aborted.
1347 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
1348 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL);
1354 static int eeepc_hotk_restore(struct device *device)
1356 struct eeepc_wmi *eeepc = dev_get_drvdata(device);
1359 /* Refresh both wlan rfkill state and pci hotplug */
1360 if (eeepc->wlan_rfkill)
1361 eeepc_rfkill_hotplug(eeepc);
1363 if (eeepc->bluetooth_rfkill) {
1364 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH);
1365 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl);
1367 if (eeepc->wimax_rfkill) {
1368 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WIMAX);
1369 rfkill_set_sw_state(eeepc->wimax_rfkill, bl);
1371 if (eeepc->wwan3g_rfkill) {
1372 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G);
1373 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl);
1379 static const struct dev_pm_ops eeepc_pm_ops = {
1380 .thaw = eeepc_hotk_thaw,
1381 .restore = eeepc_hotk_restore,
1384 static struct platform_driver platform_driver = {
1385 .remove = __exit_p(eeepc_wmi_remove),
1387 .name = EEEPC_WMI_FILE,
1388 .owner = THIS_MODULE,
1389 .pm = &eeepc_pm_ops,
1393 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level,
1394 void *context, void **retval)
1396 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
1397 *(bool *)context = true;
1398 return AE_CTRL_TERMINATE;
1401 static int __init eeepc_wmi_check_atkd(void)
1406 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
1409 if (ACPI_FAILURE(status) || !found)
1414 static int __init eeepc_wmi_probe(struct platform_device *pdev)
1416 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
1417 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) {
1418 pr_warning("No known WMI GUID found\n");
1422 if (eeepc_wmi_check_atkd()) {
1423 pr_warning("WMI device present, but legacy ATKD device is also "
1424 "present and enabled.");
1425 pr_warning("You probably booted with acpi_osi=\"Linux\" or "
1426 "acpi_osi=\"!Windows 2009\"");
1427 pr_warning("Can't load eeepc-wmi, use default acpi_osi "
1428 "(preferred) or eeepc-laptop");
1432 return eeepc_wmi_add(pdev);
1435 static struct platform_device *platform_device;
1437 static int __init eeepc_wmi_init(void)
1439 platform_device = platform_create_bundle(&platform_driver,
1442 if (IS_ERR(platform_device))
1443 return PTR_ERR(platform_device);
1447 static void __exit eeepc_wmi_exit(void)
1449 platform_device_unregister(platform_device);
1450 platform_driver_unregister(&platform_driver);
1453 module_init(eeepc_wmi_init);
1454 module_exit(eeepc_wmi_exit);