Fujitsu-laptop update

Add additional capabilities to the Fujitsu-laptop driver.

 * Brightness hotkey actions are sent to userspace. This can be disabled
   using a module parameter if it causes issues with models which handle
   these keys transparently in the BIOS.

 * Actions of additional hotkeys found on some Fujitsu models (eg: the
   suspend key and the dedicated "power on passphrase" keys) are broadcast
   to userspace.

 * An alternative brightness control method used by some Fujitsu models
   (for example, the S6410) is now supported, enabling software brightness
   controls on models using this method.

 * DMI-based module aliases are configured for the S6410 and S7020.

 * The current LCD brightness after booting should now be reflected in the
   standard backlight interface sysfs file (previously it was always set to
   0).  The platform brightness sysfs interface has always been fine.

Thanks go to Peter Gruber who provided a significant portion of this code
and tested various iterations of the patch on his S6410.

Signed-off-by: Peter Gruber <nokos@gmx.net>
Signed-off-by: Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>

3 files changed, 792 insertions, 52 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 2bfde0326300..ec5c8ee30907 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1792,6 +1792,12 @@ P:	David Howells
 M:      dhowells@redhat.com
 S:      Maintained
 
+FUJITSU LAPTOP EXTRAS
+P:      Jonathan Woithe
+M:      jwoithe@physics.adelaide.edu.au
+L:      linux-acpi@vger.kernel.org
+S:      Maintained
+
 FUSE: FILESYSTEM IN USERSPACE
 P:      Miklos Szeredi
 M:      miklos@szeredi.hu
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 7fce0da86548..0551d95a749a 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -185,11 +185,22 @@ config FUJITSU_LAPTOP
 
             * P2xxx/P5xxx/S6xxx/S7xxx series Lifebooks
             * Possibly other Fujitsu laptop models
+            * Tested with S6410 and S7020
 
-          It adds support for LCD brightness control.
+          It adds support for LCD brightness control and some hotkeys.
 
           If you have a Fujitsu laptop, say Y or M here.
 
+config FUJITSU_LAPTOP_DEBUG
+        bool "Verbose debug mode for Fujitsu Laptop Extras"
+        depends on FUJITSU_LAPTOP
+        default n
+        ---help---
+          Enables extra debug output from the fujitsu extras driver, at the
+          expense of a slight increase in driver size.
+
+          If you are not sure, say N here.
+
 config TC1100_WMI
         tristate "HP Compaq TC1100 Tablet WMI Extras (EXPERIMENTAL)"
         depends on X86 && !X86_64
diff --git a/drivers/misc/fujitsu-laptop.c b/drivers/misc/fujitsu-laptop.c
index 6d14e8fe1537..7a1ef6c262de 100644
--- a/drivers/misc/fujitsu-laptop.c
+++ b/drivers/misc/fujitsu-laptop.c
@@ -1,12 +1,14 @@
 /*-*-linux-c-*-*/
 
 /*
-  Copyright (C) 2007 Jonathan Woithe <jwoithe@physics.adelaide.edu.au>
+  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 which is copyright by its respective authors.
+  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
@@ -39,8 +41,17 @@
  * registers itself in the Linux backlight control subsystem and is
  * available to userspace under /sys/class/backlight/fujitsu-laptop/.
  *
- * This driver has been tested on a Fujitsu Lifebook S7020.  It should
- * work on most P-series and S-series Lifebooks, but YMMV.
+ * 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 and S7020.  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>
@@ -49,30 +60,105 @@
 #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 "0.3"
+#define FUJITSU_DRIVER_VERSION "0.4.2"
 
 #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 extras driver"
+#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 LOCK_KEY        0x410   /* codes for the keys in the GIRB register */
+#define DISPLAY_KEY     0x411   /* keys are mapped to KEY_SCREENLOCK (the key with the key symbol) */
+#define ENERGY_KEY      0x412   /* KEY_MEDIA (the key with the laptop symbol, KEY_EMAIL (E key)) */
+#define REST_KEY        0x413   /* KEY_SUSPEND (R key) */
+
+#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;
 
-        unsigned long fuj02b1_state;
+        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 */
+};
 
-/* Hardware access */
+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)
 {
@@ -81,7 +167,10 @@ static int set_lcd_level(int level)
         struct acpi_object_list arg_list = { 1, &arg0 };
         acpi_handle handle = NULL;
 
-        if (level < 0 || level >= FUJITSU_LCD_N_LEVELS)
+        vdbg_printk(FUJLAPTOP_DBG_TRACE, "set lcd level via SBLL [%d]\n",
+                    level);
+
+        if (level < 0 || level >= fujitsu->max_brightness)
                 return -EINVAL;
 
         if (!fujitsu)
@@ -89,7 +178,38 @@ static int set_lcd_level(int level)
 
         status = acpi_get_handle(fujitsu->acpi_handle, "SBLL", &handle);
         if (ACPI_FAILURE(status)) {
-                ACPI_DEBUG_PRINT((ACPI_DB_INFO, "SBLL not present\n"));
+                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;
         }
 
@@ -107,13 +227,52 @@ static int get_lcd_level(void)
         unsigned long state = 0;
         acpi_status status = AE_OK;
 
-        // Get the Brightness
+        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->fuj02b1_state = state;
+        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 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 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)
@@ -128,12 +287,18 @@ static int get_lcd_level(void)
 
 static int bl_get_brightness(struct backlight_device *b)
 {
-        return get_lcd_level();
+        if (use_alt_lcd_levels)
+                return get_lcd_level_alt();
+        else
+                return get_lcd_level();
 }
 
 static int bl_update_status(struct backlight_device *b)
 {
-        return set_lcd_level(b->props.brightness);
+        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 = {
@@ -141,7 +306,35 @@ static struct backlight_ops fujitsubl_ops = {
         .update_status = bl_update_status,
 };
 
-/* Platform device */
+/* 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)
@@ -149,7 +342,10 @@ static ssize_t show_lcd_level(struct device *dev,
 
         int ret;
 
-        ret = get_lcd_level();
+        if (use_alt_lcd_levels)
+                ret = get_lcd_level_alt();
+        else
+                ret = get_lcd_level();
         if (ret < 0)
                 return ret;
 
@@ -164,19 +360,61 @@ static ssize_t store_lcd_level(struct device *dev,
         int level, ret;
 
         if (sscanf(buf, "%i", &level) != 1
-            || (level < 0 || level >= FUJITSU_LCD_N_LEVELS))
+            || (level < 0 || level >= fujitsu->max_brightness))
                 return -EINVAL;
 
-        ret = set_lcd_level(level);
+        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 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
 };
@@ -192,14 +430,52 @@ static struct platform_driver fujitsupf_driver = {
                    }
 };
 
-/* ACPI device */
+static int dmi_check_cb_s6410(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;
+        }
+        return 0;
+}
+
+static struct dmi_system_id __initdata fujitsu_dmi_table[] = {
+        {
+         .ident = "Fujitsu Siemens",
+         .matches = {
+                     DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
+                     DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK S6410"),
+                     },
+         .callback = dmi_check_cb_s6410},
+        {}
+};
+
+/* 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;
-
-        ACPI_FUNCTION_TRACE("acpi_fujitsu_add");
+        struct input_dev *input;
+        int error;
 
         if (!device)
                 return -EINVAL;
@@ -209,10 +485,42 @@ static int acpi_fujitsu_add(struct acpi_device *device)
         sprintf(acpi_device_class(device), "%s", ACPI_FUJITSU_CLASS);
         acpi_driver_data(device) = 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) {
-                ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
-                                  "Error reading power state\n"));
+                printk(KERN_ERR "Error reading power state\n");
                 goto end;
         }
 
@@ -220,22 +528,373 @@ static int acpi_fujitsu_add(struct acpi_device *device)
                acpi_device_name(device), acpi_device_bid(device),
                !device->power.state ? "on" : "off");
 
-      end:
+        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) */
+        dmi_check_system(fujitsu_dmi_table);
+        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_FUNCTION_TRACE("acpi_fujitsu_remove");
+        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);
+        acpi_driver_data(device) = 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(KEY_SCREENLOCK, input->keybit);
+        set_bit(KEY_MEDIA, input->keybit);
+        set_bit(KEY_EMAIL, input->keybit);
+        set_bit(KEY_SUSPEND, 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 LOCK_KEY:
+                                keycode = KEY_SCREENLOCK;
+                                break;
+                        case DISPLAY_KEY:
+                                keycode = KEY_MEDIA;
+                                break;
+                        case ENERGY_KEY:
+                                keycode = KEY_EMAIL;
+                                break;
+                        case REST_KEY:
+                                keycode = KEY_SUSPEND;
+                                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},
@@ -251,11 +910,24 @@ static struct acpi_driver acpi_fujitsu_driver = {
                 },
 };
 
-/* Initialization */
+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;
+        int ret, result, max_brightness;
 
         if (acpi_disabled)
                 return -ENODEV;
@@ -271,19 +943,6 @@ static int __init fujitsu_init(void)
                 goto fail_acpi;
         }
 
-        /* Register backlight stuff */
-
-        fujitsu->bl_device =
-            backlight_device_register("fujitsu-laptop", NULL, NULL,
-                                      &fujitsubl_ops);
-        if (IS_ERR(fujitsu->bl_device))
-                return PTR_ERR(fujitsu->bl_device);
-
-        fujitsu->bl_device->props.max_brightness = FUJITSU_LCD_N_LEVELS - 1;
-        ret = platform_driver_register(&fujitsupf_driver);
-        if (ret)
-                goto fail_backlight;
-
         /* Register platform stuff */
 
         fujitsu->pf_device = platform_device_alloc("fujitsu-laptop", -1);
@@ -302,28 +961,68 @@ static int __init fujitsu_init(void)
         if (ret)
                 goto fail_platform_device2;
 
+        /* Register backlight stuff */
+
+        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_platform_device2:
+fail_hotkey1:
 
-        platform_device_del(fujitsu->pf_device);
-
-      fail_platform_device1:
-
-        platform_device_put(fujitsu->pf_device);
+        kfree(fujitsu_hotkey);
 
-      fail_platform_driver:
+fail_hotkey:
 
         platform_driver_unregister(&fujitsupf_driver);
 
-      fail_backlight:
+fail_backlight:
 
         backlight_device_unregister(fujitsu->bl_device);
 
-      fail_acpi:
+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);
 
@@ -342,19 +1041,43 @@ static void __exit fujitsu_cleanup(void)
 
         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_AUTHOR("Jonathan Woithe");
+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);