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
68 #define EEEPC_WMI_METHODID_DSTS 0x53544344
69 #define EEEPC_WMI_METHODID_DEVS 0x53564544
70 #define EEEPC_WMI_METHODID_CFVS 0x53564643
72 #define EEEPC_WMI_DEVID_WLAN 0x00010011
73 #define EEEPC_WMI_DEVID_BLUETOOTH 0x00010013
74 #define EEEPC_WMI_DEVID_WIMAX 0x00010017
75 #define EEEPC_WMI_DEVID_WWAN3G 0x00010019
76 #define EEEPC_WMI_DEVID_BACKLIGHT 0x00050011
77 #define EEEPC_WMI_DEVID_BRIGHTNESS 0x00050012
78 #define EEEPC_WMI_DEVID_CAMERA 0x00060013
79 #define EEEPC_WMI_DEVID_CARDREADER 0x00080013
80 #define EEEPC_WMI_DEVID_TPDLED 0x00100011
82 #define EEEPC_WMI_DSTS_STATUS_BIT 0x00000001
83 #define EEEPC_WMI_DSTS_PRESENCE_BIT 0x00010000
84 #define EEEPC_WMI_DSTS_BRIGHTNESS_MASK 0x000000FF
85 #define EEEPC_WMI_DSTS_MAX_BRIGTH_MASK 0x0000FF00
87 static bool hotplug_wireless;
89 module_param(hotplug_wireless, bool, 0444);
90 MODULE_PARM_DESC(hotplug_wireless,
91 "Enable hotplug for wireless device. "
92 "If your laptop needs that, please report to "
93 "acpi4asus-user@lists.sourceforge.net.");
95 static const struct key_entry eeepc_wmi_keymap[] = {
96 /* Sleep already handled via generic ACPI code */
97 { KE_IGNORE, NOTIFY_BRNDOWN_MIN, { KEY_BRIGHTNESSDOWN } },
98 { KE_IGNORE, NOTIFY_BRNUP_MIN, { KEY_BRIGHTNESSUP } },
99 { KE_KEY, 0x30, { KEY_VOLUMEUP } },
100 { KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
101 { KE_KEY, 0x32, { KEY_MUTE } },
102 { KE_KEY, 0x5c, { KEY_F15 } },
103 { KE_KEY, 0x5d, { KEY_WLAN } },
104 { KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */
105 { KE_KEY, 0x88, { KEY_WLAN } },
106 { KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
107 { KE_KEY, 0xe0, { KEY_PROG1 } },
108 { KE_KEY, 0xe1, { KEY_F14 } },
109 { KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } },
119 * eeepc-wmi/ - debugfs root directory
120 * dev_id - current dev_id
121 * ctrl_param - current ctrl_param
122 * devs - call DEVS(dev_id, ctrl_param) and print result
123 * dsts - call DSTS(dev_id) and print result
125 struct eeepc_wmi_debug {
132 bool hotplug_wireless;
134 struct input_dev *inputdev;
135 struct backlight_device *backlight_device;
136 struct platform_device *platform_device;
138 struct led_classdev tpd_led;
140 struct workqueue_struct *led_workqueue;
141 struct work_struct tpd_led_work;
143 struct rfkill *wlan_rfkill;
144 struct rfkill *bluetooth_rfkill;
145 struct rfkill *wimax_rfkill;
146 struct rfkill *wwan3g_rfkill;
148 struct hotplug_slot *hotplug_slot;
149 struct mutex hotplug_lock;
150 struct mutex wmi_lock;
151 struct workqueue_struct *hotplug_workqueue;
152 struct work_struct hotplug_work;
154 struct eeepc_wmi_debug debug;
157 static int eeepc_wmi_input_init(struct eeepc_wmi *eeepc)
161 eeepc->inputdev = input_allocate_device();
162 if (!eeepc->inputdev)
165 eeepc->inputdev->name = "Eee PC WMI hotkeys";
166 eeepc->inputdev->phys = EEEPC_WMI_FILE "/input0";
167 eeepc->inputdev->id.bustype = BUS_HOST;
168 eeepc->inputdev->dev.parent = &eeepc->platform_device->dev;
170 err = sparse_keymap_setup(eeepc->inputdev, eeepc_wmi_keymap, NULL);
174 err = input_register_device(eeepc->inputdev);
176 goto err_free_keymap;
181 sparse_keymap_free(eeepc->inputdev);
183 input_free_device(eeepc->inputdev);
187 static void eeepc_wmi_input_exit(struct eeepc_wmi *eeepc)
189 if (eeepc->inputdev) {
190 sparse_keymap_free(eeepc->inputdev);
191 input_unregister_device(eeepc->inputdev);
194 eeepc->inputdev = NULL;
197 static acpi_status eeepc_wmi_get_devstate(u32 dev_id, u32 *retval)
199 struct acpi_buffer input = { (acpi_size)sizeof(u32), &dev_id };
200 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
201 union acpi_object *obj;
205 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
206 1, EEEPC_WMI_METHODID_DSTS,
209 if (ACPI_FAILURE(status))
212 obj = (union acpi_object *)output.pointer;
213 if (obj && obj->type == ACPI_TYPE_INTEGER)
214 tmp = (u32)obj->integer.value;
227 static acpi_status eeepc_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
230 struct bios_args args = {
232 .ctrl_param = ctrl_param,
234 struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
238 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
239 EEEPC_WMI_METHODID_DEVS,
242 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
243 union acpi_object *obj;
246 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID, 1,
247 EEEPC_WMI_METHODID_DEVS,
250 if (ACPI_FAILURE(status))
253 obj = (union acpi_object *)output.pointer;
254 if (obj && obj->type == ACPI_TYPE_INTEGER)
255 tmp = (u32)obj->integer.value;
267 /* Helper for special devices with magic return codes */
268 static int eeepc_wmi_get_devstate_bits(u32 dev_id, u32 mask)
273 status = eeepc_wmi_get_devstate(dev_id, &retval);
275 if (ACPI_FAILURE(status))
278 if (!(retval & EEEPC_WMI_DSTS_PRESENCE_BIT))
281 return retval & mask;
284 static int eeepc_wmi_get_devstate_simple(u32 dev_id)
286 return eeepc_wmi_get_devstate_bits(dev_id, EEEPC_WMI_DSTS_STATUS_BIT);
293 * These functions actually update the LED's, and are called from a
294 * workqueue. By doing this as separate work rather than when the LED
295 * subsystem asks, we avoid messing with the Eeepc ACPI stuff during a
296 * potentially bad time, such as a timer interrupt.
298 static void tpd_led_update(struct work_struct *work)
301 struct eeepc_wmi *eeepc;
303 eeepc = container_of(work, struct eeepc_wmi, tpd_led_work);
305 ctrl_param = eeepc->tpd_led_wk;
306 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_TPDLED, ctrl_param, NULL);
309 static void tpd_led_set(struct led_classdev *led_cdev,
310 enum led_brightness value)
312 struct eeepc_wmi *eeepc;
314 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
316 eeepc->tpd_led_wk = !!value;
317 queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
320 static int read_tpd_state(struct eeepc_wmi *eeepc)
322 return eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_TPDLED);
325 static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
327 struct eeepc_wmi *eeepc;
329 eeepc = container_of(led_cdev, struct eeepc_wmi, tpd_led);
331 return read_tpd_state(eeepc);
334 static int eeepc_wmi_led_init(struct eeepc_wmi *eeepc)
338 if (read_tpd_state(eeepc) < 0)
341 eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
342 if (!eeepc->led_workqueue)
344 INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
346 eeepc->tpd_led.name = "eeepc::touchpad";
347 eeepc->tpd_led.brightness_set = tpd_led_set;
348 eeepc->tpd_led.brightness_get = tpd_led_get;
349 eeepc->tpd_led.max_brightness = 1;
351 rv = led_classdev_register(&eeepc->platform_device->dev,
354 destroy_workqueue(eeepc->led_workqueue);
361 static void eeepc_wmi_led_exit(struct eeepc_wmi *eeepc)
363 if (eeepc->tpd_led.dev)
364 led_classdev_unregister(&eeepc->tpd_led);
365 if (eeepc->led_workqueue)
366 destroy_workqueue(eeepc->led_workqueue);
370 * PCI hotplug (for wlan rfkill)
372 static bool eeepc_wlan_rfkill_blocked(struct eeepc_wmi *eeepc)
374 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
381 static void eeepc_rfkill_hotplug(struct eeepc_wmi *eeepc)
389 mutex_lock(&eeepc->wmi_lock);
390 blocked = eeepc_wlan_rfkill_blocked(eeepc);
391 mutex_unlock(&eeepc->wmi_lock);
393 mutex_lock(&eeepc->hotplug_lock);
395 if (eeepc->wlan_rfkill)
396 rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
398 if (eeepc->hotplug_slot) {
399 bus = pci_find_bus(0, 1);
401 pr_warning("Unable to find PCI bus 1?\n");
405 if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
406 pr_err("Unable to read PCI config space?\n");
409 absent = (l == 0xffffffff);
411 if (blocked != absent) {
412 pr_warning("BIOS says wireless lan is %s, "
413 "but the pci device is %s\n",
414 blocked ? "blocked" : "unblocked",
415 absent ? "absent" : "present");
416 pr_warning("skipped wireless hotplug as probably "
417 "inappropriate for this model\n");
422 dev = pci_get_slot(bus, 0);
424 /* Device already present */
428 dev = pci_scan_single_device(bus, 0);
430 pci_bus_assign_resources(bus);
431 if (pci_bus_add_device(dev))
432 pr_err("Unable to hotplug wifi\n");
435 dev = pci_get_slot(bus, 0);
437 pci_remove_bus_device(dev);
444 mutex_unlock(&eeepc->hotplug_lock);
447 static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
449 struct eeepc_wmi *eeepc = data;
451 if (event != ACPI_NOTIFY_BUS_CHECK)
455 * We can't call directly eeepc_rfkill_hotplug because most
456 * of the time WMBC is still being executed and not reetrant.
457 * There is currently no way to tell ACPICA that we want this
458 * method to be serialized, we schedule a eeepc_rfkill_hotplug
459 * call later, in a safer context.
461 queue_work(eeepc->hotplug_workqueue, &eeepc->hotplug_work);
464 static int eeepc_register_rfkill_notifier(struct eeepc_wmi *eeepc,
470 status = acpi_get_handle(NULL, node, &handle);
472 if (ACPI_SUCCESS(status)) {
473 status = acpi_install_notify_handler(handle,
477 if (ACPI_FAILURE(status))
478 pr_warning("Failed to register notify on %s\n", node);
485 static void eeepc_unregister_rfkill_notifier(struct eeepc_wmi *eeepc,
488 acpi_status status = AE_OK;
491 status = acpi_get_handle(NULL, node, &handle);
493 if (ACPI_SUCCESS(status)) {
494 status = acpi_remove_notify_handler(handle,
496 eeepc_rfkill_notify);
497 if (ACPI_FAILURE(status))
498 pr_err("Error removing rfkill notify handler %s\n",
503 static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
506 int result = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
515 static void eeepc_cleanup_pci_hotplug(struct hotplug_slot *hotplug_slot)
517 kfree(hotplug_slot->info);
521 static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
522 .owner = THIS_MODULE,
523 .get_adapter_status = eeepc_get_adapter_status,
524 .get_power_status = eeepc_get_adapter_status,
527 static void eeepc_hotplug_work(struct work_struct *work)
529 struct eeepc_wmi *eeepc;
531 eeepc = container_of(work, struct eeepc_wmi, hotplug_work);
532 eeepc_rfkill_hotplug(eeepc);
535 static int eeepc_setup_pci_hotplug(struct eeepc_wmi *eeepc)
538 struct pci_bus *bus = pci_find_bus(0, 1);
541 pr_err("Unable to find wifi PCI bus\n");
545 eeepc->hotplug_workqueue =
546 create_singlethread_workqueue("hotplug_workqueue");
547 if (!eeepc->hotplug_workqueue)
548 goto error_workqueue;
550 INIT_WORK(&eeepc->hotplug_work, eeepc_hotplug_work);
552 eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
553 if (!eeepc->hotplug_slot)
556 eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
558 if (!eeepc->hotplug_slot->info)
561 eeepc->hotplug_slot->private = eeepc;
562 eeepc->hotplug_slot->release = &eeepc_cleanup_pci_hotplug;
563 eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
564 eeepc_get_adapter_status(eeepc->hotplug_slot,
565 &eeepc->hotplug_slot->info->adapter_status);
567 ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
569 pr_err("Unable to register hotplug slot - %d\n", ret);
576 kfree(eeepc->hotplug_slot->info);
578 kfree(eeepc->hotplug_slot);
579 eeepc->hotplug_slot = NULL;
581 destroy_workqueue(eeepc->hotplug_workqueue);
589 static int eeepc_rfkill_set(void *data, bool blocked)
591 int dev_id = (unsigned long)data;
592 u32 ctrl_param = !blocked;
595 status = eeepc_wmi_set_devstate(dev_id, ctrl_param, NULL);
597 if (ACPI_FAILURE(status))
603 static void eeepc_rfkill_query(struct rfkill *rfkill, void *data)
605 int dev_id = (unsigned long)data;
608 result = eeepc_wmi_get_devstate_simple(dev_id);
613 rfkill_set_sw_state(rfkill, !result);
616 static int eeepc_rfkill_wlan_set(void *data, bool blocked)
618 struct eeepc_wmi *eeepc = data;
622 * This handler is enabled only if hotplug is enabled.
623 * In this case, the eeepc_wmi_set_devstate() will
624 * trigger a wmi notification and we need to wait
625 * this call to finish before being able to call
628 mutex_lock(&eeepc->wmi_lock);
629 ret = eeepc_rfkill_set((void *)(long)EEEPC_WMI_DEVID_WLAN, blocked);
630 mutex_unlock(&eeepc->wmi_lock);
634 static void eeepc_rfkill_wlan_query(struct rfkill *rfkill, void *data)
636 eeepc_rfkill_query(rfkill, (void *)(long)EEEPC_WMI_DEVID_WLAN);
639 static const struct rfkill_ops eeepc_rfkill_wlan_ops = {
640 .set_block = eeepc_rfkill_wlan_set,
641 .query = eeepc_rfkill_wlan_query,
644 static const struct rfkill_ops eeepc_rfkill_ops = {
645 .set_block = eeepc_rfkill_set,
646 .query = eeepc_rfkill_query,
649 static int eeepc_new_rfkill(struct eeepc_wmi *eeepc,
650 struct rfkill **rfkill,
652 enum rfkill_type type, int dev_id)
654 int result = eeepc_wmi_get_devstate_simple(dev_id);
659 if (dev_id == EEEPC_WMI_DEVID_WLAN && eeepc->hotplug_wireless)
660 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
661 &eeepc_rfkill_wlan_ops, eeepc);
663 *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
664 &eeepc_rfkill_ops, (void *)(long)dev_id);
669 rfkill_init_sw_state(*rfkill, !result);
670 result = rfkill_register(*rfkill);
672 rfkill_destroy(*rfkill);
679 static void eeepc_wmi_rfkill_exit(struct eeepc_wmi *eeepc)
681 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
682 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
683 eeepc_unregister_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
684 if (eeepc->wlan_rfkill) {
685 rfkill_unregister(eeepc->wlan_rfkill);
686 rfkill_destroy(eeepc->wlan_rfkill);
687 eeepc->wlan_rfkill = NULL;
690 * Refresh pci hotplug in case the rfkill state was changed after
691 * eeepc_unregister_rfkill_notifier()
693 eeepc_rfkill_hotplug(eeepc);
694 if (eeepc->hotplug_slot)
695 pci_hp_deregister(eeepc->hotplug_slot);
696 if (eeepc->hotplug_workqueue)
697 destroy_workqueue(eeepc->hotplug_workqueue);
699 if (eeepc->bluetooth_rfkill) {
700 rfkill_unregister(eeepc->bluetooth_rfkill);
701 rfkill_destroy(eeepc->bluetooth_rfkill);
702 eeepc->bluetooth_rfkill = NULL;
704 if (eeepc->wimax_rfkill) {
705 rfkill_unregister(eeepc->wimax_rfkill);
706 rfkill_destroy(eeepc->wimax_rfkill);
707 eeepc->wimax_rfkill = NULL;
709 if (eeepc->wwan3g_rfkill) {
710 rfkill_unregister(eeepc->wwan3g_rfkill);
711 rfkill_destroy(eeepc->wwan3g_rfkill);
712 eeepc->wwan3g_rfkill = NULL;
716 static int eeepc_wmi_rfkill_init(struct eeepc_wmi *eeepc)
720 mutex_init(&eeepc->hotplug_lock);
721 mutex_init(&eeepc->wmi_lock);
723 result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
724 "eeepc-wlan", RFKILL_TYPE_WLAN,
725 EEEPC_WMI_DEVID_WLAN);
727 if (result && result != -ENODEV)
730 result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
731 "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
732 EEEPC_WMI_DEVID_BLUETOOTH);
734 if (result && result != -ENODEV)
737 result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
738 "eeepc-wimax", RFKILL_TYPE_WIMAX,
739 EEEPC_WMI_DEVID_WIMAX);
741 if (result && result != -ENODEV)
744 result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
745 "eeepc-wwan3g", RFKILL_TYPE_WWAN,
746 EEEPC_WMI_DEVID_WWAN3G);
748 if (result && result != -ENODEV)
751 if (!eeepc->hotplug_wireless)
754 result = eeepc_setup_pci_hotplug(eeepc);
756 * If we get -EBUSY then something else is handling the PCI hotplug -
757 * don't fail in this case
759 if (result == -EBUSY)
762 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P5");
763 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P6");
764 eeepc_register_rfkill_notifier(eeepc, "\\_SB.PCI0.P0P7");
766 * Refresh pci hotplug in case the rfkill state was changed during
769 eeepc_rfkill_hotplug(eeepc);
772 if (result && result != -ENODEV)
773 eeepc_wmi_rfkill_exit(eeepc);
775 if (result == -ENODEV)
784 static int read_backlight_power(void)
786 int ret = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BACKLIGHT);
791 return ret ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
794 static int read_brightness(struct backlight_device *bd)
799 status = eeepc_wmi_get_devstate(EEEPC_WMI_DEVID_BRIGHTNESS, &retval);
801 if (ACPI_FAILURE(status))
804 return retval & EEEPC_WMI_DSTS_BRIGHTNESS_MASK;
807 static int update_bl_status(struct backlight_device *bd)
813 ctrl_param = bd->props.brightness;
815 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BRIGHTNESS,
818 if (ACPI_FAILURE(status))
821 power = read_backlight_power();
822 if (power != -ENODEV && bd->props.power != power) {
823 ctrl_param = !!(bd->props.power == FB_BLANK_UNBLANK);
824 status = eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_BACKLIGHT,
827 if (ACPI_FAILURE(status))
833 static const struct backlight_ops eeepc_wmi_bl_ops = {
834 .get_brightness = read_brightness,
835 .update_status = update_bl_status,
838 static int eeepc_wmi_backlight_notify(struct eeepc_wmi *eeepc, int code)
840 struct backlight_device *bd = eeepc->backlight_device;
841 int old = bd->props.brightness;
844 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
845 new = code - NOTIFY_BRNUP_MIN + 1;
846 else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
847 new = code - NOTIFY_BRNDOWN_MIN;
849 bd->props.brightness = new;
850 backlight_update_status(bd);
851 backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
856 static int eeepc_wmi_backlight_init(struct eeepc_wmi *eeepc)
858 struct backlight_device *bd;
859 struct backlight_properties props;
863 max = eeepc_wmi_get_devstate_bits(EEEPC_WMI_DEVID_BRIGHTNESS,
864 EEEPC_WMI_DSTS_MAX_BRIGTH_MASK);
865 power = read_backlight_power();
867 if (max < 0 && power < 0) {
868 /* Try to keep the original error */
869 if (max == -ENODEV && power == -ENODEV)
878 if (power == -ENODEV)
879 power = FB_BLANK_UNBLANK;
881 memset(&props, 0, sizeof(struct backlight_properties));
882 props.max_brightness = max;
883 bd = backlight_device_register(EEEPC_WMI_FILE,
884 &eeepc->platform_device->dev, eeepc,
885 &eeepc_wmi_bl_ops, &props);
887 pr_err("Could not register backlight device\n");
891 eeepc->backlight_device = bd;
893 bd->props.brightness = read_brightness(bd);
894 bd->props.power = power;
895 backlight_update_status(bd);
900 static void eeepc_wmi_backlight_exit(struct eeepc_wmi *eeepc)
902 if (eeepc->backlight_device)
903 backlight_device_unregister(eeepc->backlight_device);
905 eeepc->backlight_device = NULL;
908 static void eeepc_wmi_notify(u32 value, void *context)
910 struct eeepc_wmi *eeepc = context;
911 struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
912 union acpi_object *obj;
917 status = wmi_get_event_data(value, &response);
918 if (status != AE_OK) {
919 pr_err("bad event status 0x%x\n", status);
923 obj = (union acpi_object *)response.pointer;
925 if (obj && obj->type == ACPI_TYPE_INTEGER) {
926 code = obj->integer.value;
929 if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
930 code = NOTIFY_BRNUP_MIN;
931 else if (code >= NOTIFY_BRNDOWN_MIN &&
932 code <= NOTIFY_BRNDOWN_MAX)
933 code = NOTIFY_BRNDOWN_MIN;
935 if (code == NOTIFY_BRNUP_MIN || code == NOTIFY_BRNDOWN_MIN) {
936 if (!acpi_video_backlight_support())
937 eeepc_wmi_backlight_notify(eeepc, orig_code);
940 if (!sparse_keymap_report_event(eeepc->inputdev,
942 pr_info("Unknown key %x pressed\n", code);
951 static int parse_arg(const char *buf, unsigned long count, int *val)
955 if (sscanf(buf, "%i", val) != 1)
960 static ssize_t store_sys_wmi(int devid, const char *buf, size_t count)
966 value = eeepc_wmi_get_devstate_simple(devid);
967 if (value == -ENODEV) /* Check device presence */
970 rv = parse_arg(buf, count, &value);
971 status = eeepc_wmi_set_devstate(devid, value, &retval);
973 if (ACPI_FAILURE(status))
978 static ssize_t show_sys_wmi(int devid, char *buf)
980 int value = eeepc_wmi_get_devstate_simple(devid);
985 return sprintf(buf, "%d\n", value);
988 #define EEEPC_WMI_CREATE_DEVICE_ATTR(_name, _mode, _cm) \
989 static ssize_t show_##_name(struct device *dev, \
990 struct device_attribute *attr, \
993 return show_sys_wmi(_cm, buf); \
995 static ssize_t store_##_name(struct device *dev, \
996 struct device_attribute *attr, \
997 const char *buf, size_t count) \
999 return store_sys_wmi(_cm, buf, count); \
1001 static struct device_attribute dev_attr_##_name = { \
1003 .name = __stringify(_name), \
1005 .show = show_##_name, \
1006 .store = store_##_name, \
1009 EEEPC_WMI_CREATE_DEVICE_ATTR(camera, 0644, EEEPC_WMI_DEVID_CAMERA);
1010 EEEPC_WMI_CREATE_DEVICE_ATTR(cardr, 0644, EEEPC_WMI_DEVID_CARDREADER);
1012 static ssize_t store_cpufv(struct device *dev, struct device_attribute *attr,
1013 const char *buf, size_t count)
1016 struct acpi_buffer input = { (acpi_size)sizeof(value), &value };
1019 if (!count || sscanf(buf, "%i", &value) != 1)
1021 if (value < 0 || value > 2)
1024 status = wmi_evaluate_method(EEEPC_WMI_MGMT_GUID,
1025 1, EEEPC_WMI_METHODID_CFVS, &input, NULL);
1027 if (ACPI_FAILURE(status))
1033 static DEVICE_ATTR(cpufv, S_IRUGO | S_IWUSR, NULL, store_cpufv);
1035 static struct attribute *platform_attributes[] = {
1036 &dev_attr_cpufv.attr,
1037 &dev_attr_camera.attr,
1038 &dev_attr_cardr.attr,
1042 static mode_t eeepc_sysfs_is_visible(struct kobject *kobj,
1043 struct attribute *attr,
1046 bool supported = true;
1049 if (attr == &dev_attr_camera.attr)
1050 devid = EEEPC_WMI_DEVID_CAMERA;
1051 else if (attr == &dev_attr_cardr.attr)
1052 devid = EEEPC_WMI_DEVID_CARDREADER;
1055 supported = eeepc_wmi_get_devstate_simple(devid) != -ENODEV;
1057 return supported ? attr->mode : 0;
1060 static struct attribute_group platform_attribute_group = {
1061 .is_visible = eeepc_sysfs_is_visible,
1062 .attrs = platform_attributes
1065 static void eeepc_wmi_sysfs_exit(struct platform_device *device)
1067 sysfs_remove_group(&device->dev.kobj, &platform_attribute_group);
1070 static int eeepc_wmi_sysfs_init(struct platform_device *device)
1072 return sysfs_create_group(&device->dev.kobj, &platform_attribute_group);
1078 static int __init eeepc_wmi_platform_init(struct eeepc_wmi *eeepc)
1080 return eeepc_wmi_sysfs_init(eeepc->platform_device);
1083 static void eeepc_wmi_platform_exit(struct eeepc_wmi *eeepc)
1085 eeepc_wmi_sysfs_exit(eeepc->platform_device);
1091 struct eeepc_wmi_debugfs_node {
1092 struct eeepc_wmi *eeepc;
1094 int (*show)(struct seq_file *m, void *data);
1097 static int show_dsts(struct seq_file *m, void *data)
1099 struct eeepc_wmi *eeepc = m->private;
1103 status = eeepc_wmi_get_devstate(eeepc->debug.dev_id, &retval);
1105 if (ACPI_FAILURE(status))
1108 seq_printf(m, "DSTS(%x) = %x\n", eeepc->debug.dev_id, retval);
1113 static int show_devs(struct seq_file *m, void *data)
1115 struct eeepc_wmi *eeepc = m->private;
1119 status = eeepc_wmi_set_devstate(eeepc->debug.dev_id,
1120 eeepc->debug.ctrl_param, &retval);
1121 if (ACPI_FAILURE(status))
1124 seq_printf(m, "DEVS(%x, %x) = %x\n", eeepc->debug.dev_id,
1125 eeepc->debug.ctrl_param, retval);
1130 static struct eeepc_wmi_debugfs_node eeepc_wmi_debug_files[] = {
1131 { NULL, "devs", show_devs },
1132 { NULL, "dsts", show_dsts },
1135 static int eeepc_wmi_debugfs_open(struct inode *inode, struct file *file)
1137 struct eeepc_wmi_debugfs_node *node = inode->i_private;
1139 return single_open(file, node->show, node->eeepc);
1142 static const struct file_operations eeepc_wmi_debugfs_io_ops = {
1143 .owner = THIS_MODULE,
1144 .open = eeepc_wmi_debugfs_open,
1146 .llseek = seq_lseek,
1147 .release = single_release,
1150 static void eeepc_wmi_debugfs_exit(struct eeepc_wmi *eeepc)
1152 debugfs_remove_recursive(eeepc->debug.root);
1155 static int eeepc_wmi_debugfs_init(struct eeepc_wmi *eeepc)
1157 struct dentry *dent;
1160 eeepc->debug.root = debugfs_create_dir(EEEPC_WMI_FILE, NULL);
1161 if (!eeepc->debug.root) {
1162 pr_err("failed to create debugfs directory");
1166 dent = debugfs_create_x32("dev_id", S_IRUGO|S_IWUSR,
1167 eeepc->debug.root, &eeepc->debug.dev_id);
1171 dent = debugfs_create_x32("ctrl_param", S_IRUGO|S_IWUSR,
1172 eeepc->debug.root, &eeepc->debug.ctrl_param);
1176 for (i = 0; i < ARRAY_SIZE(eeepc_wmi_debug_files); i++) {
1177 struct eeepc_wmi_debugfs_node *node = &eeepc_wmi_debug_files[i];
1179 node->eeepc = eeepc;
1180 dent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
1181 eeepc->debug.root, node,
1182 &eeepc_wmi_debugfs_io_ops);
1184 pr_err("failed to create debug file: %s\n", node->name);
1192 eeepc_wmi_debugfs_exit(eeepc);
1199 static void eeepc_dmi_check(struct eeepc_wmi *eeepc)
1203 model = dmi_get_system_info(DMI_PRODUCT_NAME);
1208 * Whitelist for wlan hotplug
1210 * Eeepc 1000H needs the current hotplug code to handle
1211 * Fn+F2 correctly. We may add other Eeepc here later, but
1212 * it seems that most of the laptops supported by eeepc-wmi
1213 * don't need to be on this list
1215 if (strcmp(model, "1000H") == 0) {
1216 eeepc->hotplug_wireless = true;
1217 pr_info("wlan hotplug enabled\n");
1221 static int __init eeepc_wmi_add(struct platform_device *pdev)
1223 struct eeepc_wmi *eeepc;
1227 eeepc = kzalloc(sizeof(struct eeepc_wmi), GFP_KERNEL);
1231 eeepc->platform_device = pdev;
1232 platform_set_drvdata(eeepc->platform_device, eeepc);
1234 eeepc->hotplug_wireless = hotplug_wireless;
1235 eeepc_dmi_check(eeepc);
1237 err = eeepc_wmi_platform_init(eeepc);
1241 err = eeepc_wmi_input_init(eeepc);
1245 err = eeepc_wmi_led_init(eeepc);
1249 err = eeepc_wmi_rfkill_init(eeepc);
1253 if (!acpi_video_backlight_support()) {
1254 err = eeepc_wmi_backlight_init(eeepc);
1255 if (err && err != -ENODEV)
1256 goto fail_backlight;
1258 pr_info("Backlight controlled by ACPI video driver\n");
1260 status = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
1261 eeepc_wmi_notify, eeepc);
1262 if (ACPI_FAILURE(status)) {
1263 pr_err("Unable to register notify handler - %d\n",
1266 goto fail_wmi_handler;
1269 err = eeepc_wmi_debugfs_init(eeepc);
1276 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1278 eeepc_wmi_backlight_exit(eeepc);
1280 eeepc_wmi_rfkill_exit(eeepc);
1282 eeepc_wmi_led_exit(eeepc);
1284 eeepc_wmi_input_exit(eeepc);
1286 eeepc_wmi_platform_exit(eeepc);
1292 static int __exit eeepc_wmi_remove(struct platform_device *device)
1294 struct eeepc_wmi *eeepc;
1296 eeepc = platform_get_drvdata(device);
1297 wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
1298 eeepc_wmi_backlight_exit(eeepc);
1299 eeepc_wmi_input_exit(eeepc);
1300 eeepc_wmi_led_exit(eeepc);
1301 eeepc_wmi_rfkill_exit(eeepc);
1302 eeepc_wmi_debugfs_exit(eeepc);
1303 eeepc_wmi_platform_exit(eeepc);
1310 * Platform driver - hibernate/resume callbacks
1312 static int eeepc_hotk_thaw(struct device *device)
1314 struct eeepc_wmi *eeepc = dev_get_drvdata(device);
1316 if (eeepc->wlan_rfkill) {
1320 * Work around bios bug - acpi _PTS turns off the wireless led
1321 * during suspend. Normally it restores it on resume, but
1322 * we should kick it ourselves in case hibernation is aborted.
1324 wlan = eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WLAN);
1325 eeepc_wmi_set_devstate(EEEPC_WMI_DEVID_WLAN, wlan, NULL);
1331 static int eeepc_hotk_restore(struct device *device)
1333 struct eeepc_wmi *eeepc = dev_get_drvdata(device);
1336 /* Refresh both wlan rfkill state and pci hotplug */
1337 if (eeepc->wlan_rfkill)
1338 eeepc_rfkill_hotplug(eeepc);
1340 if (eeepc->bluetooth_rfkill) {
1341 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_BLUETOOTH);
1342 rfkill_set_sw_state(eeepc->bluetooth_rfkill, bl);
1344 if (eeepc->wimax_rfkill) {
1345 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WIMAX);
1346 rfkill_set_sw_state(eeepc->wimax_rfkill, bl);
1348 if (eeepc->wwan3g_rfkill) {
1349 bl = !eeepc_wmi_get_devstate_simple(EEEPC_WMI_DEVID_WWAN3G);
1350 rfkill_set_sw_state(eeepc->wwan3g_rfkill, bl);
1356 static const struct dev_pm_ops eeepc_pm_ops = {
1357 .thaw = eeepc_hotk_thaw,
1358 .restore = eeepc_hotk_restore,
1361 static struct platform_driver platform_driver = {
1362 .remove = __exit_p(eeepc_wmi_remove),
1364 .name = EEEPC_WMI_FILE,
1365 .owner = THIS_MODULE,
1366 .pm = &eeepc_pm_ops,
1370 static acpi_status __init eeepc_wmi_parse_device(acpi_handle handle, u32 level,
1371 void *context, void **retval)
1373 pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
1374 *(bool *)context = true;
1375 return AE_CTRL_TERMINATE;
1378 static int __init eeepc_wmi_check_atkd(void)
1383 status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
1386 if (ACPI_FAILURE(status) || !found)
1391 static int __init eeepc_wmi_probe(struct platform_device *pdev)
1393 if (!wmi_has_guid(EEEPC_WMI_EVENT_GUID) ||
1394 !wmi_has_guid(EEEPC_WMI_MGMT_GUID)) {
1395 pr_warning("No known WMI GUID found\n");
1399 if (eeepc_wmi_check_atkd()) {
1400 pr_warning("WMI device present, but legacy ATKD device is also "
1401 "present and enabled.");
1402 pr_warning("You probably booted with acpi_osi=\"Linux\" or "
1403 "acpi_osi=\"!Windows 2009\"");
1404 pr_warning("Can't load eeepc-wmi, use default acpi_osi "
1405 "(preferred) or eeepc-laptop");
1409 return eeepc_wmi_add(pdev);
1412 static struct platform_device *platform_device;
1414 static int __init eeepc_wmi_init(void)
1416 platform_device = platform_create_bundle(&platform_driver,
1419 if (IS_ERR(platform_device))
1420 return PTR_ERR(platform_device);
1424 static void __exit eeepc_wmi_exit(void)
1426 platform_device_unregister(platform_device);
1427 platform_driver_unregister(&platform_driver);
1430 module_init(eeepc_wmi_init);
1431 module_exit(eeepc_wmi_exit);