Add a WMI driver for Eee PC laptops. Currently it only supports hotkeys.
Signed-off-by: Yong Wang <yong.y.wang@xxxxxxxxx>
---
drivers/platform/x86/Kconfig | 10 ++
drivers/platform/x86/Makefile | 1
drivers/platform/x86/eeepc-wmi.c | 217 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 228 insertions(+)
diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig
index e631dbe..7bec458 100644
--- a/drivers/platform/x86/Kconfig
+++ b/drivers/platform/x86/Kconfig
@@ -385,6 +385,16 @@ config EEEPC_LAPTOP
If you have an Eee PC laptop, say Y or M here.
+config EEEPC_WMI
+ tristate "Eee PC WMI Hotkey Driver (EXPERIMENTAL)"
+ depends on ACPI_WMI
+ depends on INPUT
+ depends on EXPERIMENTAL
+ ---help---
+ Say Y here if you want to support WMI-based hotkeys on Eee PC laptops.
+
+ To compile this driver as a module, choose M here: the module will
+ be called eeepc-wmi.
config ACPI_WMI
tristate "WMI"
diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile
index 9cd9fa0..a906490 100644
--- a/drivers/platform/x86/Makefile
+++ b/drivers/platform/x86/Makefile
@@ -4,6 +4,7 @@
#
obj-$(CONFIG_ASUS_LAPTOP) += asus-laptop.o
obj-$(CONFIG_EEEPC_LAPTOP) += eeepc-laptop.o
+obj-$(CONFIG_EEEPC_WMI) += eeepc-wmi.o
obj-$(CONFIG_MSI_LAPTOP) += msi-laptop.o
obj-$(CONFIG_ACPI_CMPC) += classmate-laptop.o
obj-$(CONFIG_COMPAL_LAPTOP) += compal-laptop.o
diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
new file mode 100644
index 0000000..cd9b4b5
--- /dev/null
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -0,0 +1,217 @@
+/*
+ * Eee PC WMI hotkey driver
+ *
+ * Copyright(C) 2010 Intel Corporation.
+ *
+ * Portions based on wistron_btns.c:
+ * Copyright (C) 2005 Miloslav Trmac <mitr@xxxxxxxx>
+ * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@xxxxxxxxxxxx>
+ * Copyright (C) 2005 Dmitry Torokhov <dtor@xxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/input.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Yong Wang <yong.y.wang@xxxxxxxxx>");
+MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
+MODULE_LICENSE("GPL");
+
+#define EEEPC_WMI_EVENT_GUID "ABBC0F72-8EA1-11D1-00A0-C90629100000"
+
+#define NOTIFY_BRNUP_MIN 0x11
+#define NOTIFY_BRNUP_MAX 0x1f
+#define NOTIFY_BRNDOWN_MIN 0x20
+#define NOTIFY_BRNDOWN_MAX 0x2e
+
+struct key_entry {
+ char type;
+ u8 code;
+ u16 keycode;
+};
+
+enum { KE_KEY, KE_END };
+
+static struct key_entry eeepc_wmi_keymap[] = {
+ /* Sleep already handled via generic ACPI code */
+ {KE_KEY, 0x5d, KEY_WLAN },
+ {KE_KEY, 0x32, KEY_MUTE },
+ {KE_KEY, 0x31, KEY_VOLUMEDOWN },
+ {KE_KEY, 0x30, KEY_VOLUMEUP },
+ {KE_KEY, NOTIFY_BRNDOWN_MIN, KEY_BRIGHTNESSDOWN },
+ {KE_KEY, NOTIFY_BRNUP_MIN, KEY_BRIGHTNESSUP },
+ {KE_KEY, 0xcc, KEY_SWITCHVIDEOMODE },
+ {KE_END, 0},
+};
+
+static struct input_dev *eeepc_wmi_input_dev;
+
+static struct key_entry *eeepc_wmi_get_entry_by_scancode(int code)
+{
+ struct key_entry *key;
+
+ for (key = eeepc_wmi_keymap; key->type != KE_END; key++)
+ if (code == key->code)
+ return key;
+
+ return NULL;
+}
+
+static struct key_entry *eeepc_wmi_get_entry_by_keycode(int code)
+{
+ struct key_entry *key;
+
+ for (key = eeepc_wmi_keymap; key->type != KE_END; key++)
+ if (code == key->keycode && key->type == KE_KEY)
+ return key;
+
+ return NULL;
+}
+
+static int eeepc_wmi_getkeycode(struct input_dev *dev, int scancode, int *keycode)
+{
+ struct key_entry *key = eeepc_wmi_get_entry_by_scancode(scancode);
+
+ if (key && key->type == KE_KEY) {
+ *keycode = key->keycode;
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int eeepc_wmi_setkeycode(struct input_dev *dev, int scancode, int keycode)
+{
+ struct key_entry *key;
+ int old_keycode;
+
+ if (keycode < 0 || keycode > KEY_MAX)
+ return -EINVAL;
+
+ key = eeepc_wmi_get_entry_by_scancode(scancode);
+ if (key && key->type == KE_KEY) {
+ old_keycode = key->keycode;
+ key->keycode = keycode;
+ set_bit(keycode, dev->keybit);
+ if (!eeepc_wmi_get_entry_by_keycode(old_keycode))
+ clear_bit(old_keycode, dev->keybit);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static void eeepc_wmi_notify(u32 value, void *context)
+{
+ struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
+ static struct key_entry *key;
+ union acpi_object *obj;
+ int code;
+
+ wmi_get_event_data(value, &response);
+
+ obj = (union acpi_object *)response.pointer;
+
+ if (obj && obj->type == ACPI_TYPE_INTEGER) {
+ code = obj->integer.value;
+
+ if (code >= NOTIFY_BRNUP_MIN && code <= NOTIFY_BRNUP_MAX)
+ code = NOTIFY_BRNUP_MIN;
+ else if (code >= NOTIFY_BRNDOWN_MIN && code <= NOTIFY_BRNDOWN_MAX)
+ code = NOTIFY_BRNDOWN_MIN;
+
+ key = eeepc_wmi_get_entry_by_scancode(code);
+
+ if (key) {
+ input_report_key(eeepc_wmi_input_dev, key->keycode, 1);
+ input_sync(eeepc_wmi_input_dev);
+ input_report_key(eeepc_wmi_input_dev, key->keycode, 0);
+ input_sync(eeepc_wmi_input_dev);
+ } else
+ printk(KERN_INFO "EEEPC WMI: Unknown key %x pressed\n", code);
+ }
+}
+
+static int eeepc_wmi_input_setup(void)
+{
+ struct key_entry *key;
+ int err;
+
+ eeepc_wmi_input_dev = input_allocate_device();
+
+ if (!eeepc_wmi_input_dev)
+ return -ENOMEM;
+
+ eeepc_wmi_input_dev->name = "Eee PC WMI hotkeys";
+ eeepc_wmi_input_dev->phys = "wmi/input0";
+ eeepc_wmi_input_dev->id.bustype = BUS_HOST;
+ eeepc_wmi_input_dev->getkeycode = eeepc_wmi_getkeycode;
+ eeepc_wmi_input_dev->setkeycode = eeepc_wmi_setkeycode;
+
+ for (key = eeepc_wmi_keymap; key->type != KE_END; key++) {
+ switch (key->type) {
+ case KE_KEY:
+ set_bit(EV_KEY, eeepc_wmi_input_dev->evbit);
+ set_bit(key->keycode, eeepc_wmi_input_dev->keybit);
+ break;
+ }
+ }
+
+ err = input_register_device(eeepc_wmi_input_dev);
+
+ if (err) {
+ input_free_device(eeepc_wmi_input_dev);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __init eeepc_wmi_init(void)
+{
+ int err;
+
+ if (wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
+ err = wmi_install_notify_handler(EEEPC_WMI_EVENT_GUID,
+ eeepc_wmi_notify, NULL);
+ if (ACPI_FAILURE(err))
+ return -EINVAL;
+
+ err = eeepc_wmi_input_setup();
+ if (err) {
+ wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static void __exit eeepc_wmi_exit(void)
+{
+ if (wmi_has_guid(EEEPC_WMI_EVENT_GUID)) {
+ wmi_remove_notify_handler(EEEPC_WMI_EVENT_GUID);
+ input_unregister_device(eeepc_wmi_input_dev);
+ }
+}
+
+module_init(eeepc_wmi_init);
+module_exit(eeepc_wmi_exit);
--
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