create drivers/platform/x86/ from drivers/misc/

Move x86 platform specific drivers from drivers/misc/
to a new home under drivers/platform/x86/.

The community has been maintaining x86 vendor-specific
platform specific drivers under /drivers/misc/ for a few years.
The oldest ones started life under drivers/acpi.
They moved out of drivers/acpi/ because they don't actually
implement the ACPI specification, but either simply
use ACPI, or implement vendor-specific ACPI extensions.

In the future we anticipate...
drivers/misc/ will go away.
other architectures will create drivers/platform/<arch>

Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 1126 insertions, 0 deletions

diff --git a/drivers/platform/x86/fujitsu-laptop.c b/drivers/platform/x86/fujitsu-laptop.c
new file mode 100644
index 00000000000..a7dd3e9fb79
--- /dev/null
+++ b/drivers/platform/x86/fujitsu-laptop.c
@@ -0,0 +1,1126 @@
+/*-*-linux-c-*-*/
+
+/*
+  Copyright (C) 2007,2008 Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
+  Copyright (C) 2008 Peter Gruber <nokos@gmx.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.
+
+  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., 51 Franklin Street, Fifth Floor, Boston, MA
+  02110-1301, USA.
+ */
+
+/*
+ * 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 exports a few files in /sys/devices/platform/fujitsu-laptop/;
+ * others may be added at a later date.
+ *
+ *   lcd_level - Screen brightness: contains a single integer in the
+ *   range 0..7. (rw)
+ *
+ * In addition to these platform device attributes the driver
+ * registers itself in the Linux backlight control subsystem and is
+ * available to userspace under /sys/class/backlight/fujitsu-laptop/.
+ *
+ * Hotkeys present on certain Fujitsu laptops (eg: the S6xxx series) are
+ * also supported by this driver.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/input.h>
+#include <linux/kfifo.h>
+#include <linux/video_output.h>
+#include <linux/platform_device.h>
+
+#define FUJITSU_DRIVER_VERSION "0.4.3"
+
+#define FUJITSU_LCD_N_LEVELS 8
+
+#define ACPI_FUJITSU_CLASS              "fujitsu"
+#define ACPI_FUJITSU_HID                "FUJ02B1"
+#define ACPI_FUJITSU_DRIVER_NAME	"Fujitsu laptop FUJ02B1 ACPI brightness driver"
+#define ACPI_FUJITSU_DEVICE_NAME        "Fujitsu FUJ02B1"
+#define ACPI_FUJITSU_HOTKEY_HID 	"FUJ02E3"
+#define ACPI_FUJITSU_HOTKEY_DRIVER_NAME "Fujitsu laptop FUJ02E3 ACPI hotkeys driver"
+#define ACPI_FUJITSU_HOTKEY_DEVICE_NAME "Fujitsu FUJ02E3"
+
+#define ACPI_FUJITSU_NOTIFY_CODE1     0x80
+
+#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS     0x86
+#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS     0x87
+
+/* Hotkey details */
+#define KEY1_CODE	0x410	/* codes for the keys in the GIRB register */
+#define KEY2_CODE	0x411
+#define KEY3_CODE	0x412
+#define KEY4_CODE	0x413
+
+#define MAX_HOTKEY_RINGBUFFER_SIZE 100
+#define RINGBUFFERSIZE 40
+
+/* Debugging */
+#define FUJLAPTOP_LOG	   ACPI_FUJITSU_HID ": "
+#define FUJLAPTOP_ERR	   KERN_ERR FUJLAPTOP_LOG
+#define FUJLAPTOP_NOTICE   KERN_NOTICE FUJLAPTOP_LOG
+#define FUJLAPTOP_INFO	   KERN_INFO FUJLAPTOP_LOG
+#define FUJLAPTOP_DEBUG    KERN_DEBUG FUJLAPTOP_LOG
+
+#define FUJLAPTOP_DBG_ALL	  0xffff
+#define FUJLAPTOP_DBG_ERROR	  0x0001
+#define FUJLAPTOP_DBG_WARN	  0x0002
+#define FUJLAPTOP_DBG_INFO	  0x0004
+#define FUJLAPTOP_DBG_TRACE	  0x0008
+
+#define dbg_printk(a_dbg_level, format, arg...) \
+	do { if (dbg_level & a_dbg_level) \
+		printk(FUJLAPTOP_DEBUG "%s: " format, __func__ , ## arg); \
+	} while (0)
+#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
+#define vdbg_printk(a_dbg_level, format, arg...) \
+	dbg_printk(a_dbg_level, format, ## arg)
+#else
+#define vdbg_printk(a_dbg_level, format, arg...)
+#endif
+
+/* Device controlling the backlight and associated keys */
+struct fujitsu_t {
+	acpi_handle acpi_handle;
+	struct acpi_device *dev;
+	struct input_dev *input;
+	char phys[32];
+	struct backlight_device *bl_device;
+	struct platform_device *pf_device;
+	int keycode1, keycode2, keycode3, keycode4;
+
+	unsigned int max_brightness;
+	unsigned int brightness_changed;
+	unsigned int brightness_level;
+};
+
+static struct fujitsu_t *fujitsu;
+static int use_alt_lcd_levels = -1;
+static int disable_brightness_keys = -1;
+static int disable_brightness_adjust = -1;
+
+/* Device used to access other hotkeys on the laptop */
+struct fujitsu_hotkey_t {
+	acpi_handle acpi_handle;
+	struct acpi_device *dev;
+	struct input_dev *input;
+	char phys[32];
+	struct platform_device *pf_device;
+	struct kfifo *fifo;
+	spinlock_t fifo_lock;
+
+	unsigned int irb;	/* info about the pressed buttons */
+};
+
+static struct fujitsu_hotkey_t *fujitsu_hotkey;
+
+static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
+				       void *data);
+
+#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
+static u32 dbg_level = 0x03;
+#endif
+
+static void acpi_fujitsu_notify(acpi_handle handle, u32 event, void *data);
+
+/* Hardware access for LCD brightness control */
+
+static int set_lcd_level(int level)
+{
+	acpi_status status = AE_OK;
+	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
+	struct acpi_object_list arg_list = { 1, &arg0 };
+	acpi_handle handle = NULL;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBLL [%d]\n",
+		    level);
+
+	if (level < 0 || level >= fujitsu->max_brightness)
+		return -EINVAL;
+
+	if (!fujitsu)
+		return -EINVAL;
+
+	status = acpi_get_handle(fujitsu->acpi_handle, "SBLL", &handle);
+	if (ACPI_FAILURE(status)) {
+		vdbg_printk(FUJLAPTOP_DBG_ERROR, "SBLL not present\n");
+		return -ENODEV;
+	}
+
+	arg0.integer.value = level;
+
+	status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	return 0;
+}
+
+static int set_lcd_level_alt(int level)
+{
+	acpi_status status = AE_OK;
+	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
+	struct acpi_object_list arg_list = { 1, &arg0 };
+	acpi_handle handle = NULL;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBL2 [%d]\n",
+		    level);
+
+	if (level < 0 || level >= fujitsu->max_brightness)
+		return -EINVAL;
+
+	if (!fujitsu)
+		return -EINVAL;
+
+	status = acpi_get_handle(fujitsu->acpi_handle, "SBL2", &handle);
+	if (ACPI_FAILURE(status)) {
+		vdbg_printk(FUJLAPTOP_DBG_ERROR, "SBL2 not present\n");
+		return -ENODEV;
+	}
+
+	arg0.integer.value = level;
+
+	status = acpi_evaluate_object(handle, NULL, &arg_list, NULL);
+	if (ACPI_FAILURE(status))
+		return -ENODEV;
+
+	return 0;
+}
+
+static int get_lcd_level(void)
+{
+	unsigned long long state = 0;
+	acpi_status status = AE_OK;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get lcd level via GBLL\n");
+
+	status =
+	    acpi_evaluate_integer(fujitsu->acpi_handle, "GBLL", NULL, &state);
+	if (status < 0)
+		return status;
+
+	fujitsu->brightness_level = state & 0x0fffffff;
+
+	if (state & 0x80000000)
+		fujitsu->brightness_changed = 1;
+	else
+		fujitsu->brightness_changed = 0;
+
+	return fujitsu->brightness_level;
+}
+
+static int get_max_brightness(void)
+{
+	unsigned long long state = 0;
+	acpi_status status = AE_OK;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get max lcd level via RBLL\n");
+
+	status =
+	    acpi_evaluate_integer(fujitsu->acpi_handle, "RBLL", NULL, &state);
+	if (status < 0)
+		return status;
+
+	fujitsu->max_brightness = state;
+
+	return fujitsu->max_brightness;
+}
+
+static int get_lcd_level_alt(void)
+{
+	unsigned long long state = 0;
+	acpi_status status = AE_OK;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "get lcd level via GBLS\n");
+
+	status =
+	    acpi_evaluate_integer(fujitsu->acpi_handle, "GBLS", NULL, &state);
+	if (status < 0)
+		return status;
+
+	fujitsu->brightness_level = state & 0x0fffffff;
+
+	if (state & 0x80000000)
+		fujitsu->brightness_changed = 1;
+	else
+		fujitsu->brightness_changed = 0;
+
+	return fujitsu->brightness_level;
+}
+
+/* Backlight device stuff */
+
+static int bl_get_brightness(struct backlight_device *b)
+{
+	if (use_alt_lcd_levels)
+		return get_lcd_level_alt();
+	else
+		return get_lcd_level();
+}
+
+static int bl_update_status(struct backlight_device *b)
+{
+	if (use_alt_lcd_levels)
+		return set_lcd_level_alt(b->props.brightness);
+	else
+		return set_lcd_level(b->props.brightness);
+}
+
+static struct backlight_ops fujitsubl_ops = {
+	.get_brightness = bl_get_brightness,
+	.update_status = bl_update_status,
+};
+
+/* Platform LCD brightness device */
+
+static ssize_t
+show_max_brightness(struct device *dev,
+		    struct device_attribute *attr, char *buf)
+{
+
+	int ret;
+
+	ret = get_max_brightness();
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t
+show_brightness_changed(struct device *dev,
+			struct device_attribute *attr, char *buf)
+{
+
+	int ret;
+
+	ret = fujitsu->brightness_changed;
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t show_lcd_level(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+
+	int ret;
+
+	if (use_alt_lcd_levels)
+		ret = get_lcd_level_alt();
+	else
+		ret = get_lcd_level();
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%i\n", ret);
+}
+
+static ssize_t store_lcd_level(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+
+	int level, ret;
+
+	if (sscanf(buf, "%i", &level) != 1
+	    || (level < 0 || level >= fujitsu->max_brightness))
+		return -EINVAL;
+
+	if (use_alt_lcd_levels)
+		ret = set_lcd_level_alt(level);
+	else
+		ret = set_lcd_level(level);
+	if (ret < 0)
+		return ret;
+
+	if (use_alt_lcd_levels)
+		ret = get_lcd_level_alt();
+	else
+		ret = get_lcd_level();
+	if (ret < 0)
+		return ret;
+
+	return count;
+}
+
+/* Hardware access for hotkey device */
+
+static int get_irb(void)
+{
+	unsigned long long state = 0;
+	acpi_status status = AE_OK;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "Get irb\n");
+
+	status =
+	    acpi_evaluate_integer(fujitsu_hotkey->acpi_handle, "GIRB", NULL,
+				  &state);
+	if (status < 0)
+		return status;
+
+	fujitsu_hotkey->irb = state;
+
+	return fujitsu_hotkey->irb;
+}
+
+static ssize_t
+ignore_store(struct device *dev,
+	     struct device_attribute *attr, const char *buf, size_t count)
+{
+	return count;
+}
+
+static DEVICE_ATTR(max_brightness, 0444, show_max_brightness, ignore_store);
+static DEVICE_ATTR(brightness_changed, 0444, show_brightness_changed,
+		   ignore_store);
+static DEVICE_ATTR(lcd_level, 0644, show_lcd_level, store_lcd_level);
+
+static struct attribute *fujitsupf_attributes[] = {
+	&dev_attr_brightness_changed.attr,
+	&dev_attr_max_brightness.attr,
+	&dev_attr_lcd_level.attr,
+	NULL
+};
+
+static struct attribute_group fujitsupf_attribute_group = {
+	.attrs = fujitsupf_attributes
+};
+
+static struct platform_driver fujitsupf_driver = {
+	.driver = {
+		   .name = "fujitsu-laptop",
+		   .owner = THIS_MODULE,
+		   }
+};
+
+static void dmi_check_cb_common(const struct dmi_system_id *id)
+{
+	acpi_handle handle;
+	int have_blnf;
+	printk(KERN_INFO "fujitsu-laptop: Identified laptop model '%s'.\n",
+	       id->ident);
+	have_blnf = ACPI_SUCCESS
+	    (acpi_get_handle(NULL, "\\_SB.PCI0.GFX0.LCD.BLNF", &handle));
+	if (use_alt_lcd_levels == -1) {
+		vdbg_printk(FUJLAPTOP_DBG_TRACE, "auto-detecting usealt\n");
+		use_alt_lcd_levels = 1;
+	}
+	if (disable_brightness_keys == -1) {
+		vdbg_printk(FUJLAPTOP_DBG_TRACE,
+			    "auto-detecting disable_keys\n");
+		disable_brightness_keys = have_blnf ? 1 : 0;
+	}
+	if (disable_brightness_adjust == -1) {
+		vdbg_printk(FUJLAPTOP_DBG_TRACE,
+			    "auto-detecting disable_adjust\n");
+		disable_brightness_adjust = have_blnf ? 0 : 1;
+	}
+}
+
+static int dmi_check_cb_s6410(const struct dmi_system_id *id)
+{
+	dmi_check_cb_common(id);
+	fujitsu->keycode1 = KEY_SCREENLOCK;	/* "Lock" */
+	fujitsu->keycode2 = KEY_HELP;	/* "Mobility Center" */
+	return 0;
+}
+
+static int dmi_check_cb_s6420(const struct dmi_system_id *id)
+{
+	dmi_check_cb_common(id);
+	fujitsu->keycode1 = KEY_SCREENLOCK;	/* "Lock" */
+	fujitsu->keycode2 = KEY_HELP;	/* "Mobility Center" */
+	return 0;
+}
+
+static int dmi_check_cb_p8010(const struct dmi_system_id *id)
+{
+	dmi_check_cb_common(id);
+	fujitsu->keycode1 = KEY_HELP;	/* "Support" */
+	fujitsu->keycode3 = KEY_SWITCHVIDEOMODE;	/* "Presentation" */
+	fujitsu->keycode4 = KEY_WWW;	/* "Internet" */
+	return 0;
+}
+
+static struct dmi_system_id fujitsu_dmi_table[] = {
+	{
+	 .ident = "Fujitsu Siemens S6410",
+	 .matches = {
+		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+		     DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
+		     },
+	 .callback = dmi_check_cb_s6410},
+	{
+	 .ident = "Fujitsu Siemens S6420",
+	 .matches = {
+		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+		     DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6420"),
+		     },
+	 .callback = dmi_check_cb_s6420},
+	{
+	 .ident = "Fujitsu LifeBook P8010",
+	 .matches = {
+		     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU"),
+		     DMI_MATCH(DMI_PRODUCT_NAME, "LifeBook P8010"),
+		     },
+	 .callback = dmi_check_cb_p8010},
+	{}
+};
+
+/* ACPI device for LCD brightness control */
+
+static int acpi_fujitsu_add(struct acpi_device *device)
+{
+	acpi_status status;
+	acpi_handle handle;
+	int result = 0;
+	int state = 0;
+	struct input_dev *input;
+	int error;
+
+	if (!device)
+		return -EINVAL;
+
+	fujitsu->acpi_handle = device->handle;
+	sprintf(acpi_device_name(device), "%s", ACPI_FUJITSU_DEVICE_NAME);
+	sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
+	device->driver_data = fujitsu;
+
+	status = acpi_install_notify_handler(device->handle,
+					     ACPI_DEVICE_NOTIFY,
+					     acpi_fujitsu_notify, fujitsu);
+
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "Error installing notify handler\n");
+		error = -ENODEV;
+		goto err_stop;
+	}
+
+	fujitsu->input = input = input_allocate_device();
+	if (!input) {
+		error = -ENOMEM;
+		goto err_uninstall_notify;
+	}
+
+	snprintf(fujitsu->phys, sizeof(fujitsu->phys),
+		 "%s/video/input0", acpi_device_hid(device));
+
+	input->name = acpi_device_name(device);
+	input->phys = fujitsu->phys;
+	input->id.bustype = BUS_HOST;
+	input->id.product = 0x06;
+	input->dev.parent = &device->dev;
+	input->evbit[0] = BIT(EV_KEY);
+	set_bit(KEY_BRIGHTNESSUP, input->keybit);
+	set_bit(KEY_BRIGHTNESSDOWN, input->keybit);
+	set_bit(KEY_UNKNOWN, input->keybit);
+
+	error = input_register_device(input);
+	if (error)
+		goto err_free_input_dev;
+
+	result = acpi_bus_get_power(fujitsu->acpi_handle, &state);
+	if (result) {
+		printk(KERN_ERR "Error reading power state\n");
+		goto end;
+	}
+
+	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+	       acpi_device_name(device), acpi_device_bid(device),
+	       !device->power.state ? "on" : "off");
+
+	fujitsu->dev = device;
+
+	if (ACPI_SUCCESS
+	    (acpi_get_handle(device->handle, METHOD_NAME__INI, &handle))) {
+		vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
+		if (ACPI_FAILURE
+		    (acpi_evaluate_object
+		     (device->handle, METHOD_NAME__INI, NULL, NULL)))
+			printk(KERN_ERR "_INI Method failed\n");
+	}
+
+	/* do config (detect defaults) */
+	use_alt_lcd_levels = use_alt_lcd_levels == 1 ? 1 : 0;
+	disable_brightness_keys = disable_brightness_keys == 1 ? 1 : 0;
+	disable_brightness_adjust = disable_brightness_adjust == 1 ? 1 : 0;
+	vdbg_printk(FUJLAPTOP_DBG_INFO,
+		    "config: [alt interface: %d], [key disable: %d], [adjust disable: %d]\n",
+		    use_alt_lcd_levels, disable_brightness_keys,
+		    disable_brightness_adjust);
+
+	if (get_max_brightness() <= 0)
+		fujitsu->max_brightness = FUJITSU_LCD_N_LEVELS;
+	if (use_alt_lcd_levels)
+		get_lcd_level_alt();
+	else
+		get_lcd_level();
+
+	return result;
+
+end:
+err_free_input_dev:
+	input_free_device(input);
+err_uninstall_notify:
+	acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+				   acpi_fujitsu_notify);
+err_stop:
+
+	return result;
+}
+
+static int acpi_fujitsu_remove(struct acpi_device *device, int type)
+{
+	acpi_status status;
+	struct fujitsu_t *fujitsu = NULL;
+
+	if (!device || !acpi_driver_data(device))
+		return -EINVAL;
+
+	fujitsu = acpi_driver_data(device);
+
+	status = acpi_remove_notify_handler(fujitsu->acpi_handle,
+					    ACPI_DEVICE_NOTIFY,
+					    acpi_fujitsu_notify);
+
+	if (!device || !acpi_driver_data(device))
+		return -EINVAL;
+
+	fujitsu->acpi_handle = NULL;
+
+	return 0;
+}
+
+/* Brightness notify */
+
+static void acpi_fujitsu_notify(acpi_handle handle, u32 event, void *data)
+{
+	struct input_dev *input;
+	int keycode;
+	int oldb, newb;
+
+	input = fujitsu->input;
+
+	switch (event) {
+	case ACPI_FUJITSU_NOTIFY_CODE1:
+		keycode = 0;
+		oldb = fujitsu->brightness_level;
+		get_lcd_level();  /* the alt version always yields changed */
+		newb = fujitsu->brightness_level;
+
+		vdbg_printk(FUJLAPTOP_DBG_TRACE,
+			    "brightness button event [%i -> %i (%i)]\n",
+			    oldb, newb, fujitsu->brightness_changed);
+
+		if (oldb == newb && fujitsu->brightness_changed) {
+			keycode = 0;
+			if (disable_brightness_keys != 1) {
+				if (oldb == 0) {
+					acpi_bus_generate_proc_event
+					    (fujitsu->dev,
+					     ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS,
+					     0);
+					keycode = KEY_BRIGHTNESSDOWN;
+				} else if (oldb ==
+					   (fujitsu->max_brightness) - 1) {
+					acpi_bus_generate_proc_event
+					    (fujitsu->dev,
+					     ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS,
+					     0);
+					keycode = KEY_BRIGHTNESSUP;
+				}
+			}
+		} else if (oldb < newb) {
+			if (disable_brightness_adjust != 1) {
+				if (use_alt_lcd_levels)
+					set_lcd_level_alt(newb);
+				else
+					set_lcd_level(newb);
+			}
+			if (disable_brightness_keys != 1) {
+				acpi_bus_generate_proc_event(fujitsu->dev,
+					ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS, 0);
+				keycode = KEY_BRIGHTNESSUP;
+			}
+		} else if (oldb > newb) {
+			if (disable_brightness_adjust != 1) {
+				if (use_alt_lcd_levels)
+					set_lcd_level_alt(newb);
+				else
+					set_lcd_level(newb);
+			}
+			if (disable_brightness_keys != 1) {
+				acpi_bus_generate_proc_event(fujitsu->dev,
+					ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS, 0);
+				keycode = KEY_BRIGHTNESSDOWN;
+			}
+		} else {
+			keycode = KEY_UNKNOWN;
+		}
+		break;
+	default:
+		keycode = KEY_UNKNOWN;
+		vdbg_printk(FUJLAPTOP_DBG_WARN,
+			    "unsupported event [0x%x]\n", event);
+		break;
+	}
+
+	if (keycode != 0) {
+		input_report_key(input, keycode, 1);
+		input_sync(input);
+		input_report_key(input, keycode, 0);
+		input_sync(input);
+	}
+
+	return;
+}
+
+/* ACPI device for hotkey handling */
+
+static int acpi_fujitsu_hotkey_add(struct acpi_device *device)
+{
+	acpi_status status;
+	acpi_handle handle;
+	int result = 0;
+	int state = 0;
+	struct input_dev *input;
+	int error;
+	int i;
+
+	if (!device)
+		return -EINVAL;
+
+	fujitsu_hotkey->acpi_handle = device->handle;
+	sprintf(acpi_device_name(device), "%s",
+		ACPI_FUJITSU_HOTKEY_DEVICE_NAME);
+	sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
+	device->driver_data = fujitsu_hotkey;
+
+	status = acpi_install_notify_handler(device->handle,
+					     ACPI_DEVICE_NOTIFY,
+					     acpi_fujitsu_hotkey_notify,
+					     fujitsu_hotkey);
+
+	if (ACPI_FAILURE(status)) {
+		printk(KERN_ERR "Error installing notify handler\n");
+		error = -ENODEV;
+		goto err_stop;
+	}
+
+	/* kfifo */
+	spin_lock_init(&fujitsu_hotkey->fifo_lock);
+	fujitsu_hotkey->fifo =
+	    kfifo_alloc(RINGBUFFERSIZE * sizeof(int), GFP_KERNEL,
+			&fujitsu_hotkey->fifo_lock);
+	if (IS_ERR(fujitsu_hotkey->fifo)) {
+		printk(KERN_ERR "kfifo_alloc failed\n");
+		error = PTR_ERR(fujitsu_hotkey->fifo);
+		goto err_stop;
+	}
+
+	fujitsu_hotkey->input = input = input_allocate_device();
+	if (!input) {
+		error = -ENOMEM;
+		goto err_uninstall_notify;
+	}
+
+	snprintf(fujitsu_hotkey->phys, sizeof(fujitsu_hotkey->phys),
+		 "%s/video/input0", acpi_device_hid(device));
+
+	input->name = acpi_device_name(device);
+	input->phys = fujitsu_hotkey->phys;
+	input->id.bustype = BUS_HOST;
+	input->id.product = 0x06;
+	input->dev.parent = &device->dev;
+	input->evbit[0] = BIT(EV_KEY);
+	set_bit(fujitsu->keycode1, input->keybit);
+	set_bit(fujitsu->keycode2, input->keybit);
+	set_bit(fujitsu->keycode3, input->keybit);
+	set_bit(fujitsu->keycode4, input->keybit);
+	set_bit(KEY_UNKNOWN, input->keybit);
+
+	error = input_register_device(input);
+	if (error)
+		goto err_free_input_dev;
+
+	result = acpi_bus_get_power(fujitsu_hotkey->acpi_handle, &state);
+	if (result) {
+		printk(KERN_ERR "Error reading power state\n");
+		goto end;
+	}
+
+	printk(KERN_INFO PREFIX "%s [%s] (%s)\n",
+	       acpi_device_name(device), acpi_device_bid(device),
+	       !device->power.state ? "on" : "off");
+
+	fujitsu_hotkey->dev = device;
+
+	if (ACPI_SUCCESS
+	    (acpi_get_handle(device->handle, METHOD_NAME__INI, &handle))) {
+		vdbg_printk(FUJLAPTOP_DBG_INFO, "Invoking _INI\n");
+		if (ACPI_FAILURE
+		    (acpi_evaluate_object
+		     (device->handle, METHOD_NAME__INI, NULL, NULL)))
+			printk(KERN_ERR "_INI Method failed\n");
+	}
+
+	i = 0;			/* Discard hotkey ringbuffer */
+	while (get_irb() != 0 && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) ;
+	vdbg_printk(FUJLAPTOP_DBG_INFO, "Discarded %i ringbuffer entries\n", i);
+
+	return result;
+
+end:
+err_free_input_dev:
+	input_free_device(input);
+err_uninstall_notify:
+	acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY,
+				   acpi_fujitsu_hotkey_notify);
+	kfifo_free(fujitsu_hotkey->fifo);
+err_stop:
+
+	return result;
+}
+
+static int acpi_fujitsu_hotkey_remove(struct acpi_device *device, int type)
+{
+	acpi_status status;
+	struct fujitsu_hotkey_t *fujitsu_hotkey = NULL;
+
+	if (!device || !acpi_driver_data(device))
+		return -EINVAL;
+
+	fujitsu_hotkey = acpi_driver_data(device);
+
+	status = acpi_remove_notify_handler(fujitsu_hotkey->acpi_handle,
+					    ACPI_DEVICE_NOTIFY,
+					    acpi_fujitsu_hotkey_notify);
+
+	fujitsu_hotkey->acpi_handle = NULL;
+
+	kfifo_free(fujitsu_hotkey->fifo);
+
+	return 0;
+}
+
+static void acpi_fujitsu_hotkey_notify(acpi_handle handle, u32 event,
+				       void *data)
+{
+	struct input_dev *input;
+	int keycode, keycode_r;
+	unsigned int irb = 1;
+	int i, status;
+
+	input = fujitsu_hotkey->input;
+
+	vdbg_printk(FUJLAPTOP_DBG_TRACE, "Hotkey event\n");
+
+	switch (event) {
+	case ACPI_FUJITSU_NOTIFY_CODE1:
+		i = 0;
+		while ((irb = get_irb()) != 0
+		       && (i++) < MAX_HOTKEY_RINGBUFFER_SIZE) {
+			vdbg_printk(FUJLAPTOP_DBG_TRACE, "GIRB result [%x]\n",
+				    irb);
+
+			switch (irb & 0x4ff) {
+			case KEY1_CODE:
+				keycode = fujitsu->keycode1;
+				break;
+			case KEY2_CODE:
+				keycode = fujitsu->keycode2;
+				break;
+			case KEY3_CODE:
+				keycode = fujitsu->keycode3;
+				break;
+			case KEY4_CODE:
+				keycode = fujitsu->keycode4;
+				break;
+			case 0:
+				keycode = 0;
+				break;
+			default:
+				vdbg_printk(FUJLAPTOP_DBG_WARN,
+					    "Unknown GIRB result [%x]\n", irb);
+				keycode = -1;
+				break;
+			}
+			if (keycode > 0) {
+				vdbg_printk(FUJLAPTOP_DBG_TRACE,
+					"Push keycode into ringbuffer [%d]\n",
+					keycode);
+				status = kfifo_put(fujitsu_hotkey->fifo,
+						   (unsigned char *)&keycode,
+						   sizeof(keycode));
+				if (status != sizeof(keycode)) {
+					vdbg_printk(FUJLAPTOP_DBG_WARN,
+					    "Could not push keycode [0x%x]\n",
+					    keycode);
+				} else {
+					input_report_key(input, keycode, 1);
+					input_sync(input);
+				}
+			} else if (keycode == 0) {
+				while ((status =
+					kfifo_get
+					(fujitsu_hotkey->fifo, (unsigned char *)
+					 &keycode_r,
+					 sizeof
+					 (keycode_r))) == sizeof(keycode_r)) {
+					input_report_key(input, keycode_r, 0);
+					input_sync(input);
+					vdbg_printk(FUJLAPTOP_DBG_TRACE,
+					  "Pop keycode from ringbuffer [%d]\n",
+					  keycode_r);
+				}
+			}
+		}
+
+		break;
+	default:
+		keycode = KEY_UNKNOWN;
+		vdbg_printk(FUJLAPTOP_DBG_WARN,
+			    "Unsupported event [0x%x]\n", event);
+		input_report_key(input, keycode, 1);
+		input_sync(input);
+		input_report_key(input, keycode, 0);
+		input_sync(input);
+		break;
+	}
+
+	return;
+}
+
+/* Initialization */
+
+static const struct acpi_device_id fujitsu_device_ids[] = {
+	{ACPI_FUJITSU_HID, 0},
+	{"", 0},
+};
+
+static struct acpi_driver acpi_fujitsu_driver = {
+	.name = ACPI_FUJITSU_DRIVER_NAME,
+	.class = ACPI_FUJITSU_CLASS,
+	.ids = fujitsu_device_ids,
+	.ops = {
+		.add = acpi_fujitsu_add,
+		.remove = acpi_fujitsu_remove,
+		},
+};
+
+static const struct acpi_device_id fujitsu_hotkey_device_ids[] = {
+	{ACPI_FUJITSU_HOTKEY_HID, 0},
+	{"", 0},
+};
+
+static struct acpi_driver acpi_fujitsu_hotkey_driver = {
+	.name = ACPI_FUJITSU_HOTKEY_DRIVER_NAME,
+	.class = ACPI_FUJITSU_CLASS,
+	.ids = fujitsu_hotkey_device_ids,
+	.ops = {
+		.add = acpi_fujitsu_hotkey_add,
+		.remove = acpi_fujitsu_hotkey_remove,
+		},
+};
+
+static int __init fujitsu_init(void)
+{
+	int ret, result, max_brightness;
+
+	if (acpi_disabled)
+		return -ENODEV;
+
+	fujitsu = kmalloc(sizeof(struct fujitsu_t), GFP_KERNEL);
+	if (!fujitsu)
+		return -ENOMEM;
+	memset(fujitsu, 0, sizeof(struct fujitsu_t));
+	fujitsu->keycode1 = KEY_PROG1;
+	fujitsu->keycode2 = KEY_PROG2;
+	fujitsu->keycode3 = KEY_PROG3;
+	fujitsu->keycode4 = KEY_PROG4;
+	dmi_check_system(fujitsu_dmi_table);
+
+	result = acpi_bus_register_driver(&acpi_fujitsu_driver);
+	if (result < 0) {
+		ret = -ENODEV;
+		goto fail_acpi;
+	}
+
+	/* Register platform stuff */
+
+	fujitsu->pf_device = platform_device_alloc("fujitsu-laptop", -1);
+	if (!fujitsu->pf_device) {
+		ret = -ENOMEM;
+		goto fail_platform_driver;
+	}
+
+	ret = platform_device_add(fujitsu->pf_device);
+	if (ret)
+		goto fail_platform_device1;
+
+	ret =
+	    sysfs_create_group(&fujitsu->pf_device->dev.kobj,
+			       &fujitsupf_attribute_group);
+	if (ret)
+		goto fail_platform_device2;
+
+	/* Register backlight stuff */
+
+	if (!acpi_video_backlight_support()) {
+		fujitsu->bl_device =
+			backlight_device_register("fujitsu-laptop", NULL, NULL,
+						  &fujitsubl_ops);
+		if (IS_ERR(fujitsu->bl_device))
+			return PTR_ERR(fujitsu->bl_device);
+		max_brightness = fujitsu->max_brightness;
+		fujitsu->bl_device->props.max_brightness = max_brightness - 1;
+		fujitsu->bl_device->props.brightness = fujitsu->brightness_level;
+	}
+
+	ret = platform_driver_register(&fujitsupf_driver);
+	if (ret)
+		goto fail_backlight;
+
+	/* Register hotkey driver */
+
+	fujitsu_hotkey = kmalloc(sizeof(struct fujitsu_hotkey_t), GFP_KERNEL);
+	if (!fujitsu_hotkey) {
+		ret = -ENOMEM;
+		goto fail_hotkey;
+	}
+	memset(fujitsu_hotkey, 0, sizeof(struct fujitsu_hotkey_t));
+
+	result = acpi_bus_register_driver(&acpi_fujitsu_hotkey_driver);
+	if (result < 0) {
+		ret = -ENODEV;
+		goto fail_hotkey1;
+	}
+
+	printk(KERN_INFO "fujitsu-laptop: driver " FUJITSU_DRIVER_VERSION
+	       " successfully loaded.\n");
+
+	return 0;
+
+fail_hotkey1:
+
+	kfree(fujitsu_hotkey);
+
+fail_hotkey:
+
+	platform_driver_unregister(&fujitsupf_driver);
+
+fail_backlight:
+
+	if (fujitsu->bl_device)
+		backlight_device_unregister(fujitsu->bl_device);
+
+fail_platform_device2:
+
+	platform_device_del(fujitsu->pf_device);
+
+fail_platform_device1:
+
+	platform_device_put(fujitsu->pf_device);
+
+fail_platform_driver:
+
+	acpi_bus_unregister_driver(&acpi_fujitsu_driver);
+
+fail_acpi:
+
+	kfree(fujitsu);
+
+	return ret;
+}
+
+static void __exit fujitsu_cleanup(void)
+{
+	sysfs_remove_group(&fujitsu->pf_device->dev.kobj,
+			   &fujitsupf_attribute_group);
+	platform_device_unregister(fujitsu->pf_device);
+	platform_driver_unregister(&fujitsupf_driver);
+	if (fujitsu->bl_device)
+		backlight_device_unregister(fujitsu->bl_device);
+
+	acpi_bus_unregister_driver(&acpi_fujitsu_driver);
+
+	kfree(fujitsu);
+
+	acpi_bus_unregister_driver(&acpi_fujitsu_hotkey_driver);
+
+	kfree(fujitsu_hotkey);
+
+	printk(KERN_INFO "fujitsu-laptop: driver unloaded.\n");
+}
+
+module_init(fujitsu_init);
+module_exit(fujitsu_cleanup);
+
+module_param(use_alt_lcd_levels, uint, 0644);
+MODULE_PARM_DESC(use_alt_lcd_levels,
+		 "Use alternative interface for lcd_levels (needed for Lifebook s6410).");
+module_param(disable_brightness_keys, uint, 0644);
+MODULE_PARM_DESC(disable_brightness_keys,
+		 "Disable brightness keys (eg. if they are already handled by the generic ACPI_VIDEO device).");
+module_param(disable_brightness_adjust, uint, 0644);
+MODULE_PARM_DESC(disable_brightness_adjust, "Disable brightness adjustment .");
+#ifdef CONFIG_FUJITSU_LAPTOP_DEBUG
+module_param_named(debug, dbg_level, uint, 0644);
+MODULE_PARM_DESC(debug, "Sets debug level bit-mask");
+#endif
+
+MODULE_AUTHOR("Jonathan Woithe, Peter Gruber");
+MODULE_DESCRIPTION("Fujitsu laptop extras support");
+MODULE_VERSION(FUJITSU_DRIVER_VERSION);
+MODULE_LICENSE("GPL");
+
+MODULE_ALIAS("dmi:*:svnFUJITSUSIEMENS:*:pvr:rvnFUJITSU:rnFJNB1D3:*:cvrS6410:*");
+MODULE_ALIAS("dmi:*:svnFUJITSU:*:pvr:rvnFUJITSU:rnFJNB19C:*:cvrS7020:*");
+
+static struct pnp_device_id pnp_ids[] = {
+	{.id = "FUJ02bf"},
+	{.id = "FUJ02B1"},
+	{.id = "FUJ02E3"},
+	{.id = ""}
+};
+
+MODULE_DEVICE_TABLE(pnp, pnp_ids);