Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1033 insertions, 0 deletions

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
new file mode 100644
index 000000000..b543d117b
--- /dev/null
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -0,0 +1,1033 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*-*-linux-c-*-*/
+
+/*
+  Copyright (C) 2007,2008 Jonathan Woithe <jwoithe@just42.net>
+  Copyright (C) 2008 Peter Gruber <nokos@gmx.net>
+  Copyright (C) 2008 Tony Vroon <tony@linx.net>
+  Based on earlier work:
+    Copyright (C) 2003 Shane Spencer <shane@bogomip.com>
+    Adrian Yee <brewt-fujitsu@brewt.org>
+
+  Templated from msi-laptop.c and thinkpad_acpi.c which is copyright
+  by its respective authors.
+
+ */
+
+/*
+ * fujitsu-laptop.c - Fujitsu laptop support, providing access to additional
+ * features made available on a range of Fujitsu laptops including the
+ * P2xxx/P5xxx/S6xxx/S7xxx series.
+ *
+ * This driver implements a vendor-specific backlight control interface for
+ * Fujitsu laptops and provides support for hotkeys present on certain Fujitsu
+ * laptops.
+ *
+ * This driver has been tested on a Fujitsu Lifebook S6410, S7020 and
+ * P8010.  It should work on most P-series and S-series Lifebooks, but
+ * YMMV.
+ *
+ * The module parameter use_alt_lcd_levels switches between different ACPI
+ * brightness controls which are used by different Fujitsu laptops.  In most
+ * cases the correct method is automatically detected. "use_alt_lcd_levels=1"
+ * is applicable for a Fujitsu Lifebook S6410 if autodetection fails.
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/bitops.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/kfifo.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <acpi/video.h>
+
+#define FUJITSU_DRIVER_VERSION		"0.6.0"
+
+#define FUJITSU_LCD_N_LEVELS		8
+
+#define ACPI_FUJITSU_CLASS		"fujitsu"
+#define ACPI_FUJITSU_BL_HID		"FUJ02B1"
+#define ACPI_FUJITSU_BL_DRIVER_NAME	"Fujitsu laptop FUJ02B1 ACPI brightness driver"
+#define ACPI_FUJITSU_BL_DEVICE_NAME	"Fujitsu FUJ02B1"
+#define ACPI_FUJITSU_LAPTOP_HID		"FUJ02E3"
+#define ACPI_FUJITSU_LAPTOP_DRIVER_NAME	"Fujitsu laptop FUJ02E3 ACPI hotkeys driver"
+#define ACPI_FUJITSU_LAPTOP_DEVICE_NAME	"Fujitsu FUJ02E3"
+
+#define ACPI_FUJITSU_NOTIFY_CODE	0x80
+
+/* FUNC interface - command values */
+#define FUNC_FLAGS			BIT(12)
+#define FUNC_LEDS			(BIT(12) | BIT(0))
+#define FUNC_BUTTONS			(BIT(12) | BIT(1))
+#define FUNC_BACKLIGHT			(BIT(12) | BIT(2))
+
+/* FUNC interface - responses */
+#define UNSUPPORTED_CMD			0x80000000
+
+/* FUNC interface - status flags */
+#define FLAG_RFKILL			BIT(5)
+#define FLAG_LID			BIT(8)
+#define FLAG_DOCK			BIT(9)
+#define FLAG_TOUCHPAD_TOGGLE		BIT(26)
+#define FLAG_MICMUTE			BIT(29)
+#define FLAG_SOFTKEYS			(FLAG_RFKILL | FLAG_TOUCHPAD_TOGGLE | FLAG_MICMUTE)
+
+/* FUNC interface - LED control */
+#define FUNC_LED_OFF			BIT(0)
+#define FUNC_LED_ON			(BIT(0) | BIT(16) | BIT(17))
+#define LOGOLAMP_POWERON		BIT(13)
+#define LOGOLAMP_ALWAYS			BIT(14)
+#define KEYBOARD_LAMPS			BIT(8)
+#define RADIO_LED_ON			BIT(5)
+#define ECO_LED				BIT(16)
+#define ECO_LED_ON			BIT(19)
+
+/* FUNC interface - backlight power control */
+#define BACKLIGHT_PARAM_POWER		BIT(2)
+#define BACKLIGHT_OFF			(BIT(0) | BIT(1))
+#define BACKLIGHT_ON			0
+
+/* Scancodes read from the GIRB register */
+#define KEY1_CODE			0x410
+#define KEY2_CODE			0x411
+#define KEY3_CODE			0x412
+#define KEY4_CODE			0x413
+#define KEY5_CODE			0x420
+
+/* Hotkey ringbuffer limits */
+#define MAX_HOTKEY_RINGBUFFER_SIZE	100
+#define RINGBUFFERSIZE			40
+
+/* Module parameters */
+static int use_alt_lcd_levels = -1;
+static bool disable_brightness_adjust;
+
+/* Device controlling the backlight and associated keys */
+struct fujitsu_bl {
+	struct input_dev *input;
+	char phys[32];
+	struct backlight_device *bl_device;
+	unsigned int max_brightness;
+	unsigned int brightness_level;
+};
+
+static struct fujitsu_bl *fujitsu_bl;
+
+/* Device used to access hotkeys and other features on the laptop */
+struct fujitsu_laptop {
+	struct input_dev *input;
+	char phys[32];
+	struct platform_device *pf_device;
+	struct kfifo fifo;
+	spinlock_t fifo_lock;
+	int flags_supported;
+	int flags_state;
+};
+
+static struct acpi_device *fext;
+
+/* Fujitsu ACPI interface function */
+
+static int call_fext_func(struct acpi_device *device,
+			  int func, int op, int feature, int state)
+{
+	union acpi_object params[4] = {
+		{ .integer.type = ACPI_TYPE_INTEGER, .integer.value = func },
+		{ .integer.type = ACPI_TYPE_INTEGER, .integer.value = op },
+		{ .integer.type = ACPI_TYPE_INTEGER, .integer.value = feature },
+		{ .integer.type = ACPI_TYPE_INTEGER, .integer.value = state }
+	};
+	struct acpi_object_list arg_list = { 4, params };
+	unsigned long long value;
+	acpi_status status;
+
+	status = acpi_evaluate_integer(device->handle, "FUNC", &arg_list,
+				       &value);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_err(device->handle, "Failed to evaluate FUNC\n");
+		return -ENODEV;
+	}
+
+	acpi_handle_debug(device->handle,
+			  "FUNC 0x%x (args 0x%x, 0x%x, 0x%x) returned 0x%x\n",
+			  func, op, feature, state, (int)value);
+	return value;
+}
+
+/* Hardware access for LCD brightness control */
+
+static int set_lcd_level(struct acpi_device *device, int level)
+{
+	struct fujitsu_bl *priv = acpi_driver_data(device);
+	acpi_status status;
+	char *method;
+
+	switch (use_alt_lcd_levels) {
+	case -1:
+		if (acpi_has_method(device->handle, "SBL2"))
+			method = "SBL2";
+		else
+			method = "SBLL";
+		break;
+	case 1:
+		method = "SBL2";
+		break;
+	default:
+		method = "SBLL";
+		break;
+	}
+
+	acpi_handle_debug(device->handle, "set lcd level via %s [%d]\n", method,
+			  level);
+
+	if (level < 0 || level >= priv->max_brightness)
+		return -EINVAL;
+
+	status = acpi_execute_simple_method(device->handle, method, level);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_err(device->handle, "Failed to evaluate %s\n",
+				method);
+		return -ENODEV;
+	}
+
+	priv->brightness_level = level;
+
+	return 0;
+}
+
+static int get_lcd_level(struct acpi_device *device)
+{
+	struct fujitsu_bl *priv = acpi_driver_data(device);
+	unsigned long long state = 0;
+	acpi_status status = AE_OK;
+
+	acpi_handle_debug(device->handle, "get lcd level via GBLL\n");
+
+	status = acpi_evaluate_integer(device->handle, "GBLL", NULL, &state);
+	if (ACPI_FAILURE(status))
+		return 0;
+
+	priv->brightness_level = state & 0x0fffffff;
+
+	return priv->brightness_level;
+}
+
+static int get_max_brightness(struct acpi_device *device)
+{
+	struct fujitsu_bl *priv = acpi_driver_data(device);
+	unsigned long long state = 0;
+	acpi_status status = AE_OK;
+
+	acpi_handle_debug(device->handle, "get max lcd level via RBLL\n");
+
+	status = acpi_evaluate_integer(device->handle, "RBLL", NULL, &state);
+	if (ACPI_FAILURE(status))
+		return -1;
+
+	priv->max_brightness = state;
+
+	return priv->max_brightness;
+}
+
+/* Backlight device stuff */
+
+static int bl_get_brightness(struct backlight_device *b)
+{
+	struct acpi_device *device = bl_get_data(b);
+
+	return b->props.power == FB_BLANK_POWERDOWN ? 0 : get_lcd_level(device);
+}
+
+static int bl_update_status(struct backlight_device *b)
+{
+	struct acpi_device *device = bl_get_data(b);
+
+	if (fext) {
+		if (b->props.power == FB_BLANK_POWERDOWN)
+			call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
+				       BACKLIGHT_PARAM_POWER, BACKLIGHT_OFF);
+		else
+			call_fext_func(fext, FUNC_BACKLIGHT, 0x1,
+				       BACKLIGHT_PARAM_POWER, BACKLIGHT_ON);
+	}
+
+	return set_lcd_level(device, b->props.brightness);
+}
+
+static const struct backlight_ops fujitsu_bl_ops = {
+	.get_brightness = bl_get_brightness,
+	.update_status = bl_update_status,
+};
+
+static ssize_t lid_show(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+	if (!(priv->flags_supported & FLAG_LID))
+		return sprintf(buf, "unknown\n");
+	if (priv->flags_state & FLAG_LID)
+		return sprintf(buf, "open\n");
+	else
+		return sprintf(buf, "closed\n");
+}
+
+static ssize_t dock_show(struct device *dev, struct device_attribute *attr,
+			 char *buf)
+{
+	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+	if (!(priv->flags_supported & FLAG_DOCK))
+		return sprintf(buf, "unknown\n");
+	if (priv->flags_state & FLAG_DOCK)
+		return sprintf(buf, "docked\n");
+	else
+		return sprintf(buf, "undocked\n");
+}
+
+static ssize_t radios_show(struct device *dev, struct device_attribute *attr,
+			   char *buf)
+{
+	struct fujitsu_laptop *priv = dev_get_drvdata(dev);
+
+	if (!(priv->flags_supported & FLAG_RFKILL))
+		return sprintf(buf, "unknown\n");
+	if (priv->flags_state & FLAG_RFKILL)
+		return sprintf(buf, "on\n");
+	else
+		return sprintf(buf, "killed\n");
+}
+
+static DEVICE_ATTR_RO(lid);
+static DEVICE_ATTR_RO(dock);
+static DEVICE_ATTR_RO(radios);
+
+static struct attribute *fujitsu_pf_attributes[] = {
+	&dev_attr_lid.attr,
+	&dev_attr_dock.attr,
+	&dev_attr_radios.attr,
+	NULL
+};
+
+static const struct attribute_group fujitsu_pf_attribute_group = {
+	.attrs = fujitsu_pf_attributes
+};
+
+static struct platform_driver fujitsu_pf_driver = {
+	.driver = {
+		   .name = "fujitsu-laptop",
+		   }
+};
+
+/* ACPI device for LCD brightness control */
+
+static const struct key_entry keymap_backlight[] = {
+	{ KE_KEY, true, { KEY_BRIGHTNESSUP } },
+	{ KE_KEY, false, { KEY_BRIGHTNESSDOWN } },
+	{ KE_END, 0 }
+};
+
+static int acpi_fujitsu_bl_input_setup(struct acpi_device *device)
+{
+	struct fujitsu_bl *priv = acpi_driver_data(device);
+	int ret;
+
+	priv->input = devm_input_allocate_device(&device->dev);
+	if (!priv->input)
+		return -ENOMEM;
+
+	snprintf(priv->phys, sizeof(priv->phys), "%s/video/input0",
+		 acpi_device_hid(device));
+
+	priv->input->name = acpi_device_name(device);
+	priv->input->phys = priv->phys;
+	priv->input->id.bustype = BUS_HOST;
+	priv->input->id.product = 0x06;
+
+	ret = sparse_keymap_setup(priv->input, keymap_backlight, NULL);
+	if (ret)
+		return ret;
+
+	return input_register_device(priv->input);
+}
+
+static int fujitsu_backlight_register(struct acpi_device *device)
+{
+	struct fujitsu_bl *priv = acpi_driver_data(device);
+	const struct backlight_properties props = {
+		.brightness = priv->brightness_level,
+		.max_brightness = priv->max_brightness - 1,
+		.type = BACKLIGHT_PLATFORM
+	};
+	struct backlight_device *bd;
+
+	bd = devm_backlight_device_register(&device->dev, "fujitsu-laptop",
+					    &device->dev, device,
+					    &fujitsu_bl_ops, &props);
+	if (IS_ERR(bd))
+		return PTR_ERR(bd);
+
+	priv->bl_device = bd;
+
+	return 0;
+}
+
+static int acpi_fujitsu_bl_add(struct acpi_device *device)
+{
+	struct fujitsu_bl *priv;
+	int ret;
+
+	if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
+		return -ENODEV;
+
+	priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	fujitsu_bl = priv;
+	strcpy(acpi_device_name(device), ACPI_FUJITSU_BL_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
+	device->driver_data = priv;
+
+	pr_info("ACPI: %s [%s]\n",
+		acpi_device_name(device), acpi_device_bid(device));
+
+	if (get_max_brightness(device) <= 0)
+		priv->max_brightness = FUJITSU_LCD_N_LEVELS;
+	get_lcd_level(device);
+
+	ret = acpi_fujitsu_bl_input_setup(device);
+	if (ret)
+		return ret;
+
+	return fujitsu_backlight_register(device);
+}
+
+/* Brightness notify */
+
+static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
+{
+	struct fujitsu_bl *priv = acpi_driver_data(device);
+	int oldb, newb;
+
+	if (event != ACPI_FUJITSU_NOTIFY_CODE) {
+		acpi_handle_info(device->handle, "unsupported event [0x%x]\n",
+				 event);
+		sparse_keymap_report_event(priv->input, -1, 1, true);
+		return;
+	}
+
+	oldb = priv->brightness_level;
+	get_lcd_level(device);
+	newb = priv->brightness_level;
+
+	acpi_handle_debug(device->handle,
+			  "brightness button event [%i -> %i]\n", oldb, newb);
+
+	if (oldb == newb)
+		return;
+
+	if (!disable_brightness_adjust)
+		set_lcd_level(device, newb);
+
+	sparse_keymap_report_event(priv->input, oldb < newb, 1, true);
+}
+
+/* ACPI device for hotkey handling */
+
+static const struct key_entry keymap_default[] = {
+	{ KE_KEY, KEY1_CODE,            { KEY_PROG1 } },
+	{ KE_KEY, KEY2_CODE,            { KEY_PROG2 } },
+	{ KE_KEY, KEY3_CODE,            { KEY_PROG3 } },
+	{ KE_KEY, KEY4_CODE,            { KEY_PROG4 } },
+	{ KE_KEY, KEY5_CODE,            { KEY_RFKILL } },
+	/* Soft keys read from status flags */
+	{ KE_KEY, FLAG_RFKILL,          { KEY_RFKILL } },
+	{ KE_KEY, FLAG_TOUCHPAD_TOGGLE, { KEY_TOUCHPAD_TOGGLE } },
+	{ KE_KEY, FLAG_MICMUTE,         { KEY_MICMUTE } },
+	{ KE_END, 0 }
+};
+
+static const struct key_entry keymap_s64x0[] = {
+	{ KE_KEY, KEY1_CODE, { KEY_SCREENLOCK } },	/* "Lock" */
+	{ KE_KEY, KEY2_CODE, { KEY_HELP } },		/* "Mobility Center */
+	{ KE_KEY, KEY3_CODE, { KEY_PROG3 } },
+	{ KE_KEY, KEY4_CODE, { KEY_PROG4 } },
+	{ KE_END, 0 }
+};
+
+static const struct key_entry keymap_p8010[] = {
+	{ KE_KEY, KEY1_CODE, { KEY_HELP } },		/* "Support" */
+	{ KE_KEY, KEY2_CODE, { KEY_PROG2 } },
+	{ KE_KEY, KEY3_CODE, { KEY_SWITCHVIDEOMODE } },	/* "Presentation" */
+	{ KE_KEY, KEY4_CODE, { KEY_WWW } },		/* "WWW" */
+	{ KE_END, 0 }
+};
+
+static const struct key_entry *keymap = keymap_default;
+
+static int fujitsu_laptop_dmi_keymap_override(const struct dmi_system_id *id)
+{
+	pr_info("Identified laptop model '%s'\n", id->ident);
+	keymap = id->driver_data;
+	return 1;
+}
+
+static const struct dmi_system_id fujitsu_laptop_dmi_table[] = {
+	{
+		.callback = fujitsu_laptop_dmi_keymap_override,
+		.ident = "Fujitsu Siemens S6410",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
+		},
+		.driver_data = (void *)keymap_s64x0
+	},
+	{
+		.callback = fujitsu_laptop_dmi_keymap_override,
+		.ident = "Fujitsu Siemens S6420",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6420"),
+		},
+		.driver_data = (void *)keymap_s64x0
+	},
+	{
+		.callback = fujitsu_laptop_dmi_keymap_override,
+		.ident = "Fujitsu LifeBook P8010",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
+		},
+		.driver_data = (void *)keymap_p8010
+	},
+	{}
+};
+
+static int acpi_fujitsu_laptop_input_setup(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	int ret;
+
+	priv->input = devm_input_allocate_device(&device->dev);
+	if (!priv->input)
+		return -ENOMEM;
+
+	snprintf(priv->phys, sizeof(priv->phys), "%s/input0",
+		 acpi_device_hid(device));
+
+	priv->input->name = acpi_device_name(device);
+	priv->input->phys = priv->phys;
+	priv->input->id.bustype = BUS_HOST;
+
+	dmi_check_system(fujitsu_laptop_dmi_table);
+	ret = sparse_keymap_setup(priv->input, keymap, NULL);
+	if (ret)
+		return ret;
+
+	return input_register_device(priv->input);
+}
+
+static int fujitsu_laptop_platform_add(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	int ret;
+
+	priv->pf_device = platform_device_alloc("fujitsu-laptop", PLATFORM_DEVID_NONE);
+	if (!priv->pf_device)
+		return -ENOMEM;
+
+	platform_set_drvdata(priv->pf_device, priv);
+
+	ret = platform_device_add(priv->pf_device);
+	if (ret)
+		goto err_put_platform_device;
+
+	ret = sysfs_create_group(&priv->pf_device->dev.kobj,
+				 &fujitsu_pf_attribute_group);
+	if (ret)
+		goto err_del_platform_device;
+
+	return 0;
+
+err_del_platform_device:
+	platform_device_del(priv->pf_device);
+err_put_platform_device:
+	platform_device_put(priv->pf_device);
+
+	return ret;
+}
+
+static void fujitsu_laptop_platform_remove(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+
+	sysfs_remove_group(&priv->pf_device->dev.kobj,
+			   &fujitsu_pf_attribute_group);
+	platform_device_unregister(priv->pf_device);
+}
+
+static int logolamp_set(struct led_classdev *cdev,
+			enum led_brightness brightness)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+	int poweron = FUNC_LED_ON, always = FUNC_LED_ON;
+	int ret;
+
+	if (brightness < LED_HALF)
+		poweron = FUNC_LED_OFF;
+
+	if (brightness < LED_FULL)
+		always = FUNC_LED_OFF;
+
+	ret = call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_POWERON, poweron);
+	if (ret < 0)
+		return ret;
+
+	return call_fext_func(device, FUNC_LEDS, 0x1, LOGOLAMP_ALWAYS, always);
+}
+
+static enum led_brightness logolamp_get(struct led_classdev *cdev)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+	int ret;
+
+	ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_ALWAYS, 0x0);
+	if (ret == FUNC_LED_ON)
+		return LED_FULL;
+
+	ret = call_fext_func(device, FUNC_LEDS, 0x2, LOGOLAMP_POWERON, 0x0);
+	if (ret == FUNC_LED_ON)
+		return LED_HALF;
+
+	return LED_OFF;
+}
+
+static int kblamps_set(struct led_classdev *cdev,
+		       enum led_brightness brightness)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+
+	if (brightness >= LED_FULL)
+		return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
+				      FUNC_LED_ON);
+	else
+		return call_fext_func(device, FUNC_LEDS, 0x1, KEYBOARD_LAMPS,
+				      FUNC_LED_OFF);
+}
+
+static enum led_brightness kblamps_get(struct led_classdev *cdev)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+	enum led_brightness brightness = LED_OFF;
+
+	if (call_fext_func(device,
+			   FUNC_LEDS, 0x2, KEYBOARD_LAMPS, 0x0) == FUNC_LED_ON)
+		brightness = LED_FULL;
+
+	return brightness;
+}
+
+static int radio_led_set(struct led_classdev *cdev,
+			 enum led_brightness brightness)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+
+	if (brightness >= LED_FULL)
+		return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
+				      RADIO_LED_ON);
+	else
+		return call_fext_func(device, FUNC_FLAGS, 0x5, RADIO_LED_ON,
+				      0x0);
+}
+
+static enum led_brightness radio_led_get(struct led_classdev *cdev)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+	enum led_brightness brightness = LED_OFF;
+
+	if (call_fext_func(device, FUNC_FLAGS, 0x4, 0x0, 0x0) & RADIO_LED_ON)
+		brightness = LED_FULL;
+
+	return brightness;
+}
+
+static int eco_led_set(struct led_classdev *cdev,
+		       enum led_brightness brightness)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+	int curr;
+
+	curr = call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0);
+	if (brightness >= LED_FULL)
+		return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
+				      curr | ECO_LED_ON);
+	else
+		return call_fext_func(device, FUNC_LEDS, 0x1, ECO_LED,
+				      curr & ~ECO_LED_ON);
+}
+
+static enum led_brightness eco_led_get(struct led_classdev *cdev)
+{
+	struct acpi_device *device = to_acpi_device(cdev->dev->parent);
+	enum led_brightness brightness = LED_OFF;
+
+	if (call_fext_func(device, FUNC_LEDS, 0x2, ECO_LED, 0x0) & ECO_LED_ON)
+		brightness = LED_FULL;
+
+	return brightness;
+}
+
+static int acpi_fujitsu_laptop_leds_register(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	struct led_classdev *led;
+	int ret;
+
+	if (call_fext_func(device,
+			   FUNC_LEDS, 0x0, 0x0, 0x0) & LOGOLAMP_POWERON) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		if (!led)
+			return -ENOMEM;
+
+		led->name = "fujitsu::logolamp";
+		led->brightness_set_blocking = logolamp_set;
+		led->brightness_get = logolamp_get;
+		ret = devm_led_classdev_register(&device->dev, led);
+		if (ret)
+			return ret;
+	}
+
+	if ((call_fext_func(device,
+			    FUNC_LEDS, 0x0, 0x0, 0x0) & KEYBOARD_LAMPS) &&
+	    (call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0) == 0x0)) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		if (!led)
+			return -ENOMEM;
+
+		led->name = "fujitsu::kblamps";
+		led->brightness_set_blocking = kblamps_set;
+		led->brightness_get = kblamps_get;
+		ret = devm_led_classdev_register(&device->dev, led);
+		if (ret)
+			return ret;
+	}
+
+	/*
+	 * Some Fujitsu laptops have a radio toggle button in place of a slide
+	 * switch and all such machines appear to also have an RF LED.  Based on
+	 * comparing DSDT tables of four Fujitsu Lifebook models (E744, E751,
+	 * S7110, S8420; the first one has a radio toggle button, the other
+	 * three have slide switches), bit 17 of flags_supported (the value
+	 * returned by method S000 of ACPI device FUJ02E3) seems to indicate
+	 * whether given model has a radio toggle button.
+	 */
+	if (priv->flags_supported & BIT(17)) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		if (!led)
+			return -ENOMEM;
+
+		led->name = "fujitsu::radio_led";
+		led->brightness_set_blocking = radio_led_set;
+		led->brightness_get = radio_led_get;
+		led->default_trigger = "rfkill-any";
+		ret = devm_led_classdev_register(&device->dev, led);
+		if (ret)
+			return ret;
+	}
+
+	/* Support for eco led is not always signaled in bit corresponding
+	 * to the bit used to control the led. According to the DSDT table,
+	 * bit 14 seems to indicate presence of said led as well.
+	 * Confirm by testing the status.
+	 */
+	if ((call_fext_func(device, FUNC_LEDS, 0x0, 0x0, 0x0) & BIT(14)) &&
+	    (call_fext_func(device,
+			    FUNC_LEDS, 0x2, ECO_LED, 0x0) != UNSUPPORTED_CMD)) {
+		led = devm_kzalloc(&device->dev, sizeof(*led), GFP_KERNEL);
+		if (!led)
+			return -ENOMEM;
+
+		led->name = "fujitsu::eco_led";
+		led->brightness_set_blocking = eco_led_set;
+		led->brightness_get = eco_led_get;
+		ret = devm_led_classdev_register(&device->dev, led);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int acpi_fujitsu_laptop_add(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv;
+	int ret, i = 0;
+
+	priv = devm_kzalloc(&device->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	WARN_ONCE(fext, "More than one FUJ02E3 ACPI device was found.  Driver may not work as intended.");
+	fext = device;
+
+	strcpy(acpi_device_name(device), ACPI_FUJITSU_LAPTOP_DEVICE_NAME);
+	strcpy(acpi_device_class(device), ACPI_FUJITSU_CLASS);
+	device->driver_data = priv;
+
+	/* kfifo */
+	spin_lock_init(&priv->fifo_lock);
+	ret = kfifo_alloc(&priv->fifo, RINGBUFFERSIZE * sizeof(int),
+			  GFP_KERNEL);
+	if (ret)
+		return ret;
+
+	pr_info("ACPI: %s [%s]\n",
+		acpi_device_name(device), acpi_device_bid(device));
+
+	while (call_fext_func(device, FUNC_BUTTONS, 0x1, 0x0, 0x0) != 0 &&
+	       i++ < MAX_HOTKEY_RINGBUFFER_SIZE)
+		; /* No action, result is discarded */
+	acpi_handle_debug(device->handle, "Discarded %i ringbuffer entries\n",
+			  i);
+
+	priv->flags_supported = call_fext_func(device, FUNC_FLAGS, 0x0, 0x0,
+					       0x0);
+
+	/* Make sure our bitmask of supported functions is cleared if the
+	   RFKILL function block is not implemented, like on the S7020. */
+	if (priv->flags_supported == UNSUPPORTED_CMD)
+		priv->flags_supported = 0;
+
+	if (priv->flags_supported)
+		priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
+						   0x0);
+
+	/* Suspect this is a keymap of the application panel, print it */
+	acpi_handle_info(device->handle, "BTNI: [0x%x]\n",
+			 call_fext_func(device, FUNC_BUTTONS, 0x0, 0x0, 0x0));
+
+	/* Sync backlight power status */
+	if (fujitsu_bl && fujitsu_bl->bl_device &&
+	    acpi_video_get_backlight_type() == acpi_backlight_vendor) {
+		if (call_fext_func(fext, FUNC_BACKLIGHT, 0x2,
+				   BACKLIGHT_PARAM_POWER, 0x0) == BACKLIGHT_OFF)
+			fujitsu_bl->bl_device->props.power = FB_BLANK_POWERDOWN;
+		else
+			fujitsu_bl->bl_device->props.power = FB_BLANK_UNBLANK;
+	}
+
+	ret = acpi_fujitsu_laptop_input_setup(device);
+	if (ret)
+		goto err_free_fifo;
+
+	ret = acpi_fujitsu_laptop_leds_register(device);
+	if (ret)
+		goto err_free_fifo;
+
+	ret = fujitsu_laptop_platform_add(device);
+	if (ret)
+		goto err_free_fifo;
+
+	return 0;
+
+err_free_fifo:
+	kfifo_free(&priv->fifo);
+
+	return ret;
+}
+
+static int acpi_fujitsu_laptop_remove(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+
+	fujitsu_laptop_platform_remove(device);
+
+	kfifo_free(&priv->fifo);
+
+	return 0;
+}
+
+static void acpi_fujitsu_laptop_press(struct acpi_device *device, int scancode)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	int ret;
+
+	ret = kfifo_in_locked(&priv->fifo, (unsigned char *)&scancode,
+			      sizeof(scancode), &priv->fifo_lock);
+	if (ret != sizeof(scancode)) {
+		dev_info(&priv->input->dev, "Could not push scancode [0x%x]\n",
+			 scancode);
+		return;
+	}
+	sparse_keymap_report_event(priv->input, scancode, 1, false);
+	dev_dbg(&priv->input->dev, "Push scancode into ringbuffer [0x%x]\n",
+		scancode);
+}
+
+static void acpi_fujitsu_laptop_release(struct acpi_device *device)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	int scancode, ret;
+
+	while (true) {
+		ret = kfifo_out_locked(&priv->fifo, (unsigned char *)&scancode,
+				       sizeof(scancode), &priv->fifo_lock);
+		if (ret != sizeof(scancode))
+			return;
+		sparse_keymap_report_event(priv->input, scancode, 0, false);
+		dev_dbg(&priv->input->dev,
+			"Pop scancode from ringbuffer [0x%x]\n", scancode);
+	}
+}
+
+static void acpi_fujitsu_laptop_notify(struct acpi_device *device, u32 event)
+{
+	struct fujitsu_laptop *priv = acpi_driver_data(device);
+	unsigned long flags;
+	int scancode, i = 0;
+	unsigned int irb;
+
+	if (event != ACPI_FUJITSU_NOTIFY_CODE) {
+		acpi_handle_info(device->handle, "Unsupported event [0x%x]\n",
+				 event);
+		sparse_keymap_report_event(priv->input, -1, 1, true);
+		return;
+	}
+
+	if (priv->flags_supported)
+		priv->flags_state = call_fext_func(device, FUNC_FLAGS, 0x4, 0x0,
+						   0x0);
+
+	while ((irb = call_fext_func(device,
+				     FUNC_BUTTONS, 0x1, 0x0, 0x0)) != 0 &&
+	       i++ < MAX_HOTKEY_RINGBUFFER_SIZE) {
+		scancode = irb & 0x4ff;
+		if (sparse_keymap_entry_from_scancode(priv->input, scancode))
+			acpi_fujitsu_laptop_press(device, scancode);
+		else if (scancode == 0)
+			acpi_fujitsu_laptop_release(device);
+		else
+			acpi_handle_info(device->handle,
+					 "Unknown GIRB result [%x]\n", irb);
+	}
+
+	/*
+	 * First seen on the Skylake-based Lifebook E736/E746/E756), the
+	 * touchpad toggle hotkey (Fn+F4) is handled in software. Other models
+	 * have since added additional "soft keys". These are reported in the
+	 * status flags queried using FUNC_FLAGS.
+	 */
+	if (priv->flags_supported & (FLAG_SOFTKEYS)) {
+		flags = call_fext_func(device, FUNC_FLAGS, 0x1, 0x0, 0x0);
+		flags &= (FLAG_SOFTKEYS);
+		for_each_set_bit(i, &flags, BITS_PER_LONG)
+			sparse_keymap_report_event(priv->input, BIT(i), 1, true);
+	}
+}
+
+/* Initialization */
+
+static const struct acpi_device_id fujitsu_bl_device_ids[] = {
+	{ACPI_FUJITSU_BL_HID, 0},
+	{"", 0},
+};
+
+static struct acpi_driver acpi_fujitsu_bl_driver = {
+	.name = ACPI_FUJITSU_BL_DRIVER_NAME,
+	.class = ACPI_FUJITSU_CLASS,
+	.ids = fujitsu_bl_device_ids,
+	.ops = {
+		.add = acpi_fujitsu_bl_add,
+		.notify = acpi_fujitsu_bl_notify,
+		},
+};
+
+static const struct acpi_device_id fujitsu_laptop_device_ids[] = {
+	{ACPI_FUJITSU_LAPTOP_HID, 0},
+	{"", 0},
+};
+
+static struct acpi_driver acpi_fujitsu_laptop_driver = {
+	.name = ACPI_FUJITSU_LAPTOP_DRIVER_NAME,
+	.class = ACPI_FUJITSU_CLASS,
+	.ids = fujitsu_laptop_device_ids,
+	.ops = {
+		.add = acpi_fujitsu_laptop_add,
+		.remove = acpi_fujitsu_laptop_remove,
+		.notify = acpi_fujitsu_laptop_notify,
+		},
+};
+
+static const struct acpi_device_id fujitsu_ids[] __used = {
+	{ACPI_FUJITSU_BL_HID, 0},
+	{ACPI_FUJITSU_LAPTOP_HID, 0},
+	{"", 0}
+};
+MODULE_DEVICE_TABLE(acpi, fujitsu_ids);
+
+static int __init fujitsu_init(void)
+{
+	int ret;
+
+	ret = acpi_bus_register_driver(&acpi_fujitsu_bl_driver);
+	if (ret)
+		return ret;
+
+	/* Register platform stuff */
+
+	ret = platform_driver_register(&fujitsu_pf_driver);
+	if (ret)
+		goto err_unregister_acpi;
+
+	/* Register laptop driver */
+
+	ret = acpi_bus_register_driver(&acpi_fujitsu_laptop_driver);
+	if (ret)
+		goto err_unregister_platform_driver;
+
+	pr_info("driver " FUJITSU_DRIVER_VERSION " successfully loaded\n");
+
+	return 0;
+
+err_unregister_platform_driver:
+	platform_driver_unregister(&fujitsu_pf_driver);
+err_unregister_acpi:
+	acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
+
+	return ret;
+}
+
+static void __exit fujitsu_cleanup(void)
+{
+	acpi_bus_unregister_driver(&acpi_fujitsu_laptop_driver);
+
+	platform_driver_unregister(&fujitsu_pf_driver);
+
+	acpi_bus_unregister_driver(&acpi_fujitsu_bl_driver);
+
+	pr_info("driver unloaded\n");
+}
+
+module_init(fujitsu_init);
+module_exit(fujitsu_cleanup);
+
+module_param(use_alt_lcd_levels, int, 0644);
+MODULE_PARM_DESC(use_alt_lcd_levels, "Interface used for setting LCD brightness level (-1 = auto, 0 = force SBLL, 1 = force SBL2)");
+module_param(disable_brightness_adjust, bool, 0644);
+MODULE_PARM_DESC(disable_brightness_adjust, "Disable LCD brightness adjustment");
+
+MODULE_AUTHOR("Jonathan Woithe, Peter Gruber, Tony Vroon");
+MODULE_DESCRIPTION("Fujitsu laptop extras support");
+MODULE_VERSION(FUJITSU_DRIVER_VERSION);
+MODULE_LICENSE("GPL");