1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/platform/x86/toshiba-wmi.c b/drivers/platform/x86/toshiba-wmi.c
new file mode 100644
index 0000000000..77c35529ab
--- /dev/null
+++ b/drivers/platform/x86/toshiba-wmi.c
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * toshiba_wmi.c - Toshiba WMI Hotkey Driver
+ *
+ * Copyright (C) 2015 Azael Avalos <coproscefalo@gmail.com>
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/acpi.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/dmi.h>
+
+MODULE_AUTHOR("Azael Avalos");
+MODULE_DESCRIPTION("Toshiba WMI Hotkey Driver");
+MODULE_LICENSE("GPL");
+
+#define WMI_EVENT_GUID	"59142400-C6A3-40FA-BADB-8A2652834100"
+
+MODULE_ALIAS("wmi:"WMI_EVENT_GUID);
+
+static struct input_dev *toshiba_wmi_input_dev;
+
+static const struct key_entry toshiba_wmi_keymap[] __initconst = {
+	/* TODO: Add keymap values once found... */
+	/*{ KE_KEY, 0x00, { KEY_ } },*/
+	{ KE_END, 0 }
+};
+
+static void toshiba_wmi_notify(u32 value, void *context)
+{
+	struct acpi_buffer response = { ACPI_ALLOCATE_BUFFER, NULL };
+	union acpi_object *obj;
+	acpi_status status;
+
+	status = wmi_get_event_data(value, &response);
+	if (ACPI_FAILURE(status)) {
+		pr_err("Bad event status 0x%x\n", status);
+		return;
+	}
+
+	obj = (union acpi_object *)response.pointer;
+	if (!obj)
+		return;
+
+	/* TODO: Add proper checks once we have data */
+	pr_debug("Unknown event received, obj type %x\n", obj->type);
+
+	kfree(response.pointer);
+}
+
+static const struct dmi_system_id toshiba_wmi_dmi_table[] __initconst = {
+	{
+		.ident = "Toshiba laptop",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+		},
+	},
+	{}
+};
+
+static int __init toshiba_wmi_input_setup(void)
+{
+	acpi_status status;
+	int err;
+
+	toshiba_wmi_input_dev = input_allocate_device();
+	if (!toshiba_wmi_input_dev)
+		return -ENOMEM;
+
+	toshiba_wmi_input_dev->name = "Toshiba WMI hotkeys";
+	toshiba_wmi_input_dev->phys = "wmi/input0";
+	toshiba_wmi_input_dev->id.bustype = BUS_HOST;
+
+	err = sparse_keymap_setup(toshiba_wmi_input_dev,
+				  toshiba_wmi_keymap, NULL);
+	if (err)
+		goto err_free_dev;
+
+	status = wmi_install_notify_handler(WMI_EVENT_GUID,
+					    toshiba_wmi_notify, NULL);
+	if (ACPI_FAILURE(status)) {
+		err = -EIO;
+		goto err_free_dev;
+	}
+
+	err = input_register_device(toshiba_wmi_input_dev);
+	if (err)
+		goto err_remove_notifier;
+
+	return 0;
+
+ err_remove_notifier:
+	wmi_remove_notify_handler(WMI_EVENT_GUID);
+ err_free_dev:
+	input_free_device(toshiba_wmi_input_dev);
+	return err;
+}
+
+static void toshiba_wmi_input_destroy(void)
+{
+	wmi_remove_notify_handler(WMI_EVENT_GUID);
+	input_unregister_device(toshiba_wmi_input_dev);
+}
+
+static int __init toshiba_wmi_init(void)
+{
+	int ret;
+
+	if (!wmi_has_guid(WMI_EVENT_GUID) ||
+	    !dmi_check_system(toshiba_wmi_dmi_table))
+		return -ENODEV;
+
+	ret = toshiba_wmi_input_setup();
+	if (ret) {
+		pr_err("Failed to setup input device\n");
+		return ret;
+	}
+
+	pr_info("Toshiba WMI Hotkey Driver\n");
+
+	return 0;
+}
+
+static void __exit toshiba_wmi_exit(void)
+{
+	if (wmi_has_guid(WMI_EVENT_GUID))
+		toshiba_wmi_input_destroy();
+}
+
+module_init(toshiba_wmi_init);
+module_exit(toshiba_wmi_exit);