eeepc-wmi: asus generic asus-wmi.ko module

New Asus notebooks are using a WMI device similar to
the one used in Eee PCs. Since we don't want to load
eeepc-wmi module on Asus notebooks, and we want to
keep the eeepc-wmi module for backward compatibility,
this patch introduce a new module, named asus-wmi, that
will be used by eeepc-wmi and the new Asus Notebook WMI
Driver.

eeepc-wmi's input device strings (device name and phys)
are kept, but rfkill and led names are changed (s/eeepc/asus/).
This should not break anything since rfkill are used by type or
index, not by name, and the eeepc::touchpad led wasn't working
correctly before 2.6.39 anyway.

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 162 insertions, 0 deletions

diff --git a/drivers/platform/x86/eeepc-wmi.c b/drivers/platform/x86/eeepc-wmi.c
new file mode 100644
index 000000000000..3a060aefc5f3
--- /dev/null
+++ b/drivers/platform/x86/eeepc-wmi.c
@@ -0,0 +1,162 @@
+/*
+ * Eee PC WMI hotkey driver
+ *
+ * Copyright(C) 2010 Intel Corporation.
+ * Copyright(C) 2010 Corentin Chary <corentin.chary@gmail.com>
+ *
+ * Portions based on wistron_btns.c:
+ * Copyright (C) 2005 Miloslav Trmac <mitr@volny.cz>
+ * Copyright (C) 2005 Bernhard Rosenkraenzer <bero@arklinux.org>
+ * Copyright (C) 2005 Dmitry Torokhov <dtor@mail.ru>
+ *
+ *  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
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/dmi.h>
+#include <acpi/acpi_bus.h>
+
+#include "asus-wmi.h"
+
+#define	EEEPC_WMI_FILE	"eeepc-wmi"
+
+MODULE_AUTHOR("Corentin Chary <corentincj@iksaif.net>");
+MODULE_DESCRIPTION("Eee PC WMI Hotkey Driver");
+MODULE_LICENSE("GPL");
+
+#define EEEPC_ACPI_HID		"ASUS010" /* old _HID used in eeepc-laptop */
+
+#define EEEPC_WMI_EVENT_GUID	"ABBC0F72-8EA1-11D1-00A0-C90629100000"
+
+MODULE_ALIAS("wmi:"EEEPC_WMI_EVENT_GUID);
+
+static bool hotplug_wireless;
+
+module_param(hotplug_wireless, bool, 0444);
+MODULE_PARM_DESC(hotplug_wireless,
+		 "Enable hotplug for wireless device. "
+		 "If your laptop needs that, please report to "
+		 "acpi4asus-user@lists.sourceforge.net.");
+
+static const struct key_entry eeepc_wmi_keymap[] = {
+	/* Sleep already handled via generic ACPI code */
+	{ KE_KEY, 0x30, { KEY_VOLUMEUP } },
+	{ KE_KEY, 0x31, { KEY_VOLUMEDOWN } },
+	{ KE_KEY, 0x32, { KEY_MUTE } },
+	{ KE_KEY, 0x5c, { KEY_F15 } }, /* Power Gear key */
+	{ KE_KEY, 0x5d, { KEY_WLAN } },
+	{ KE_KEY, 0x6b, { KEY_F13 } }, /* Disable Touchpad */
+	{ KE_KEY, 0x82, { KEY_CAMERA } },
+	{ KE_KEY, 0x88, { KEY_WLAN } },
+	{ KE_KEY, 0xcc, { KEY_SWITCHVIDEOMODE } },
+	{ KE_KEY, 0xe0, { KEY_PROG1 } }, /* Task Manager */
+	{ KE_KEY, 0xe1, { KEY_F14 } }, /* Change Resolution */
+	{ KE_KEY, 0xe9, { KEY_BRIGHTNESS_ZERO } },
+	{ KE_END, 0},
+};
+
+static acpi_status eeepc_wmi_parse_device(acpi_handle handle, u32 level,
+						 void *context, void **retval)
+{
+	pr_warning("Found legacy ATKD device (%s)", EEEPC_ACPI_HID);
+	*(bool *)context = true;
+	return AE_CTRL_TERMINATE;
+}
+
+static int eeepc_wmi_check_atkd(void)
+{
+	acpi_status status;
+	bool found = false;
+
+	status = acpi_get_devices(EEEPC_ACPI_HID, eeepc_wmi_parse_device,
+				  &found, NULL);
+
+	if (ACPI_FAILURE(status) || !found)
+		return 0;
+	return -1;
+}
+
+static int eeepc_wmi_probe(struct platform_device *pdev)
+{
+	if (eeepc_wmi_check_atkd()) {
+		pr_warning("WMI device present, but legacy ATKD device is also "
+			   "present and enabled.");
+		pr_warning("You probably booted with acpi_osi=\"Linux\" or "
+			   "acpi_osi=\"!Windows 2009\"");
+		pr_warning("Can't load eeepc-wmi, use default acpi_osi "
+			   "(preferred) or eeepc-laptop");
+		return -EBUSY;
+	}
+	return 0;
+}
+
+static void eeepc_dmi_check(struct asus_wmi_driver *driver)
+{
+	const char *model;
+
+	model = dmi_get_system_info(DMI_PRODUCT_NAME);
+	if (!model)
+		return;
+
+	/*
+	 * Whitelist for wlan hotplug
+	 *
+	 * Asus 1000H needs the current hotplug code to handle
+	 * Fn+F2 correctly. We may add other Asus here later, but
+	 * it seems that most of the laptops supported by asus-wmi
+	 * don't need to be on this list
+	 */
+	if (strcmp(model, "1000H") == 0) {
+		driver->hotplug_wireless = true;
+		pr_info("wlan hotplug enabled\n");
+	}
+}
+
+static void eeepc_wmi_quirks(struct asus_wmi_driver *driver)
+{
+	driver->hotplug_wireless = hotplug_wireless;
+	eeepc_dmi_check(driver);
+}
+
+static struct asus_wmi_driver asus_wmi_driver = {
+	.name = EEEPC_WMI_FILE,
+	.owner = THIS_MODULE,
+	.event_guid = EEEPC_WMI_EVENT_GUID,
+	.keymap = eeepc_wmi_keymap,
+	.input_name = "Eee PC WMI hotkeys",
+	.input_phys = EEEPC_WMI_FILE "/input0",
+	.probe = eeepc_wmi_probe,
+	.quirks = eeepc_wmi_quirks,
+};
+
+
+static int __init eeepc_wmi_init(void)
+{
+	return asus_wmi_register_driver(&asus_wmi_driver);
+}
+
+static void __exit eeepc_wmi_exit(void)
+{
+	asus_wmi_unregister_driver(&asus_wmi_driver);
+}
+
+module_init(eeepc_wmi_init);
+module_exit(eeepc_wmi_exit);