Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=745a5d2126926808295742932d0e36d485efa485
Commit:     745a5d2126926808295742932d0e36d485efa485
Parent:     bff431e49ff531a343fbb2b4426e313000844f32
Author:     Carlos Corbacho <[EMAIL PROTECTED]>
AuthorDate: Tue Feb 5 02:17:10 2008 +0000
Committer:  Len Brown <[EMAIL PROTECTED]>
CommitDate: Tue Feb 5 15:07:00 2008 -0500

    acer-wmi: Add driver for newer Acer laptops
    
    This is a driver for newer Acer (and Wistron) laptops. It adds wireless
    radio and bluetooth control, and on some laptops, exposes the mail LED and
    LCD backlight.
    
    v1:
    
    * Initial release
    
    v2:
    
    * Replace left over ACPI references with WMI
    * Add GUID based autoloading (depends on future work to WMI)
    * Add DMI based autoloading (backup solution until WMI sysfs/ class
      work is available)
    * Checkpatch fixes
    
    v3:
    
    * Add new EC quirks for Aspire 3100 & 5100, and Extensa 5220
    
    v4:
    
    * Simplified internal handling of WMID and AMW0 devices
    * Add autodetection for bluetooth and maximum brightness on AMW0 V2 and
      WMID laptops.
    
    v5:
    
    * Add EC quirk for Medion MD 98000
    * Add autodetection for AMW0, and mail LED on AMW0 and AMW0 V2.
    * Improve error handling
    * Fix AMW0 V2 bluetooth and wireless, by using both WMID and AMW0 methods
      to ensure that the correct value is always set.
    
    v6:
    
    * Fix 'use before initialisation' bug with quirks.
    
    v7
    
    * Fix bug on AMW0 where acer-wmi would exit if a mail LED was not
      detected.
    * Add Acer Aspire 9110 mail LED support
    * Fix section mismatch warnings
    
    Signed-off-by: Carlos Corbacho <[EMAIL PROTECTED]>
    CC: Matthew Garrett <[EMAIL PROTECTED]>
    Signed-off-by: Len Brown <[EMAIL PROTECTED]>
---
 MAINTAINERS             |    7 +
 drivers/misc/Kconfig    |   16 +
 drivers/misc/Makefile   |    1 +
 drivers/misc/acer-wmi.c | 1109 +++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 1133 insertions(+), 0 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 12e26d7..2eaeef4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -202,6 +202,13 @@ L: [EMAIL PROTECTED]
 W:     http://www.adaptec.com/
 S:     Supported
 
+ACER WMI LAPTOP EXTRAS
+P:     Carlos Corbacho
+M:     [EMAIL PROTECTED]
+L:     [EMAIL PROTECTED] (subscribers-only)
+W:     http://code.google.com/p/aceracpi
+S:     Maintained
+
 ACPI
 P:     Len Brown
 M:     [EMAIL PROTECTED]
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index b5e67c0..35d2c22 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -92,6 +92,22 @@ config TIFM_7XX1
           To compile this driver as a module, choose M here: the module will
          be called tifm_7xx1.
 
+config ACER_WMI
+        tristate "Acer WMI Laptop Extras (EXPERIMENTAL)"
+       depends on X86
+       depends on EXPERIMENTAL
+       depends on ACPI
+       depends on ACPI_WMI
+       depends on LEDS_CLASS
+       depends on BACKLIGHT_CLASS_DEVICE
+       ---help---
+         This is a driver for newer Acer (and Wistron) laptops. It adds
+         wireless radio and bluetooth control, and on some laptops,
+         exposes the mail LED and LCD backlight.
+
+         If you have an ACPI-WMI compatible Acer/ Wistron laptop, say Y or M
+         here.
+
 config ASUS_LAPTOP
         tristate "Asus Laptop Extras (EXPERIMENTAL)"
         depends on X86
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 87f2685..3da1491 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -6,6 +6,7 @@ obj- := misc.o  # Dummy rule to force built-in.o to be made
 obj-$(CONFIG_IBM_ASM)          += ibmasm/
 obj-$(CONFIG_HDPU_FEATURES)    += hdpuftrs/
 obj-$(CONFIG_MSI_LAPTOP)     += msi-laptop.o
+obj-$(CONFIG_ACER_WMI)     += acer-wmi.o
 obj-$(CONFIG_ASUS_LAPTOP)     += asus-laptop.o
 obj-$(CONFIG_ATMEL_SSC)                += atmel-ssc.o
 obj-$(CONFIG_LKDTM)            += lkdtm.o
diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
new file mode 100644
index 0000000..a4d6775
--- /dev/null
+++ b/drivers/misc/acer-wmi.c
@@ -0,0 +1,1109 @@
+/*
+ *  Acer WMI Laptop Extras
+ *
+ *  Copyright (C) 2007-2008    Carlos Corbacho <[EMAIL PROTECTED]>
+ *
+ *  Based on acer_acpi:
+ *    Copyright (C) 2005-2007  E.M. Smith
+ *    Copyright (C) 2007-2008  Carlos Corbacho <[EMAIL PROTECTED]>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#define ACER_WMI_VERSION       "0.1"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/backlight.h>
+#include <linux/leds.h>
+#include <linux/platform_device.h>
+#include <linux/acpi.h>
+#include <linux/i8042.h>
+
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Carlos Corbacho");
+MODULE_DESCRIPTION("Acer Laptop WMI Extras Driver");
+MODULE_LICENSE("GPL");
+
+#define ACER_LOGPREFIX "acer-wmi: "
+#define ACER_ERR KERN_ERR ACER_LOGPREFIX
+#define ACER_NOTICE KERN_NOTICE ACER_LOGPREFIX
+#define ACER_INFO KERN_INFO ACER_LOGPREFIX
+
+/*
+ * The following defines quirks to get some specific functions to work
+ * which are known to not be supported over ACPI-WMI (such as the mail LED
+ * on WMID based Acer's)
+ */
+struct acer_quirks {
+       const char *vendor;
+       const char *model;
+       u16 quirks;
+};
+
+/*
+ * Magic Number
+ * Meaning is unknown - this number is required for writing to ACPI for AMW0
+ * (it's also used in acerhk when directly accessing the BIOS)
+ */
+#define ACER_AMW0_WRITE        0x9610
+
+/*
+ * Bit masks for the AMW0 interface
+ */
+#define ACER_AMW0_WIRELESS_MASK  0x35
+#define ACER_AMW0_BLUETOOTH_MASK 0x34
+#define ACER_AMW0_MAILLED_MASK   0x31
+
+/*
+ * Method IDs for WMID interface
+ */
+#define ACER_WMID_GET_WIRELESS_METHODID                1
+#define ACER_WMID_GET_BLUETOOTH_METHODID       2
+#define ACER_WMID_GET_BRIGHTNESS_METHODID      3
+#define ACER_WMID_SET_WIRELESS_METHODID                4
+#define ACER_WMID_SET_BLUETOOTH_METHODID       5
+#define ACER_WMID_SET_BRIGHTNESS_METHODID      6
+#define ACER_WMID_GET_THREEG_METHODID          10
+#define ACER_WMID_SET_THREEG_METHODID          11
+
+/*
+ * Acer ACPI method GUIDs
+ */
+#define AMW0_GUID1             "67C3371D-95A3-4C37-BB61-DD47B491DAAB"
+#define WMID_GUID1             "6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3"
+#define WMID_GUID2             "95764E09-FB56-4e83-B31A-37761F60994A"
+
+MODULE_ALIAS("wmi:67C3371D-95A3-4C37-BB61-DD47B491DAAB");
+MODULE_ALIAS("wmi:6AF4F258-B401-42fd-BE91-3D4AC2D7C0D3");
+
+/* Temporary workaround until the WMI sysfs interface goes in */
+MODULE_ALIAS("dmi:*:*Acer*:*:");
+
+/*
+ * Interface capability flags
+ */
+#define ACER_CAP_MAILLED               (1<<0)
+#define ACER_CAP_WIRELESS              (1<<1)
+#define ACER_CAP_BLUETOOTH             (1<<2)
+#define ACER_CAP_BRIGHTNESS            (1<<3)
+#define ACER_CAP_THREEG                        (1<<4)
+#define ACER_CAP_ANY                   (0xFFFFFFFF)
+
+/*
+ * Interface type flags
+ */
+enum interface_flags {
+       ACER_AMW0,
+       ACER_AMW0_V2,
+       ACER_WMID,
+};
+
+#define ACER_DEFAULT_WIRELESS  0
+#define ACER_DEFAULT_BLUETOOTH 0
+#define ACER_DEFAULT_MAILLED   0
+#define ACER_DEFAULT_THREEG    0
+
+static int max_brightness = 0xF;
+
+static int wireless = -1;
+static int bluetooth = -1;
+static int mailled = -1;
+static int brightness = -1;
+static int threeg = -1;
+static int force_series;
+
+module_param(mailled, int, 0444);
+module_param(wireless, int, 0444);
+module_param(bluetooth, int, 0444);
+module_param(brightness, int, 0444);
+module_param(threeg, int, 0444);
+module_param(force_series, int, 0444);
+MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
+MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
+MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
+MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
+MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
+MODULE_PARM_DESC(force_series, "Force a different laptop series");
+
+struct acer_data {
+       int mailled;
+       int wireless;
+       int bluetooth;
+       int threeg;
+       int brightness;
+};
+
+/* Each low-level interface must define at least some of the following */
+struct wmi_interface {
+       /* The WMI device type */
+       u32 type;
+
+       /* The capabilities this interface provides */
+       u32 capability;
+
+       /* Private data for the current interface */
+       struct acer_data data;
+};
+
+/* The static interface pointer, points to the currently detected interface */
+static struct wmi_interface *interface;
+
+/*
+ * Embedded Controller quirks
+ * Some laptops require us to directly access the EC to either enable or query
+ * features that are not available through WMI.
+ */
+
+struct quirk_entry {
+       u8 wireless;
+       u8 mailled;
+       u8 brightness;
+       u8 bluetooth;
+};
+
+static struct quirk_entry *quirks;
+
+static void set_quirks(void)
+{
+       if (quirks->mailled)
+               interface->capability |= ACER_CAP_MAILLED;
+
+       if (quirks->brightness)
+               interface->capability |= ACER_CAP_BRIGHTNESS;
+}
+
+static int dmi_matched(const struct dmi_system_id *dmi)
+{
+       quirks = dmi->driver_data;
+       return 0;
+}
+
+static struct quirk_entry quirk_unknown = {
+};
+
+static struct quirk_entry quirk_acer_travelmate_2490 = {
+       .mailled = 1,
+};
+
+/* This AMW0 laptop has no bluetooth */
+static struct quirk_entry quirk_medion_md_98300 = {
+       .wireless = 1,
+};
+
+static struct dmi_system_id acer_quirks[] = {
+       {
+               .callback = dmi_matched,
+               .ident = "Acer Aspire 3100",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 3100"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Acer Aspire 5100",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5100"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Acer Aspire 5630",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5630"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Acer Aspire 5650",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5650"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Acer Aspire 5680",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Acer Aspire 9110",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 9110"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Acer TravelMate 2490",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 2490"),
+               },
+               .driver_data = &quirk_acer_travelmate_2490,
+       },
+       {
+               .callback = dmi_matched,
+               .ident = "Medion MD 98300",
+               .matches = {
+                       DMI_MATCH(DMI_SYS_VENDOR, "MEDION"),
+                       DMI_MATCH(DMI_PRODUCT_NAME, "WAM2030"),
+               },
+               .driver_data = &quirk_medion_md_98300,
+       },
+       {}
+};
+
+/* Find which quirks are needed for a particular vendor/ model pair */
+static void find_quirks(void)
+{
+       if (!force_series) {
+               dmi_check_system(acer_quirks);
+       } else if (force_series == 2490) {
+               quirks = &quirk_acer_travelmate_2490;
+       }
+
+       if (quirks == NULL)
+               quirks = &quirk_unknown;
+
+       set_quirks();
+}
+
+/*
+ * General interface convenience methods
+ */
+
+static bool has_cap(u32 cap)
+{
+       if ((interface->capability & cap) != 0)
+               return 1;
+
+       return 0;
+}
+
+/*
+ * AMW0 (V1) interface
+ */
+struct wmab_args {
+       u32 eax;
+       u32 ebx;
+       u32 ecx;
+       u32 edx;
+};
+
+struct wmab_ret {
+       u32 eax;
+       u32 ebx;
+       u32 ecx;
+       u32 edx;
+       u32 eex;
+};
+
+static acpi_status wmab_execute(struct wmab_args *regbuf,
+struct acpi_buffer *result)
+{
+       struct acpi_buffer input;
+       acpi_status status;
+       input.length = sizeof(struct wmab_args);
+       input.pointer = (u8 *)regbuf;
+
+       status = wmi_evaluate_method(AMW0_GUID1, 1, 1, &input, result);
+
+       return status;
+}
+
+static acpi_status AMW0_get_u32(u32 *value, u32 cap,
+struct wmi_interface *iface)
+{
+       int err;
+       u8 result;
+
+       switch (cap) {
+       case ACER_CAP_MAILLED:
+               switch (quirks->mailled) {
+               default:
+                       err = ec_read(0xA, &result);
+                       if (err)
+                               return AE_ERROR;
+                       *value = (result >> 7) & 0x1;
+                       return AE_OK;
+               }
+               break;
+       case ACER_CAP_WIRELESS:
+               switch (quirks->wireless) {
+               case 1:
+                       err = ec_read(0x7B, &result);
+                       if (err)
+                               return AE_ERROR;
+                       *value = result & 0x1;
+                       return AE_OK;
+               default:
+                       err = ec_read(0xA, &result);
+                       if (err)
+                               return AE_ERROR;
+                       *value = (result >> 2) & 0x1;
+                       return AE_OK;
+               }
+               break;
+       case ACER_CAP_BLUETOOTH:
+               switch (quirks->bluetooth) {
+               default:
+                       err = ec_read(0xA, &result);
+                       if (err)
+                               return AE_ERROR;
+                       *value = (result >> 4) & 0x1;
+                       return AE_OK;
+               }
+               break;
+       case ACER_CAP_BRIGHTNESS:
+               switch (quirks->brightness) {
+               default:
+                       err = ec_read(0x83, &result);
+                       if (err)
+                               return AE_ERROR;
+                       *value = result;
+                       return AE_OK;
+               }
+               break;
+       default:
+               return AE_BAD_ADDRESS;
+       }
+       return AE_OK;
+}
+
+static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface 
*iface)
+{
+       struct wmab_args args;
+
+       args.eax = ACER_AMW0_WRITE;
+       args.ebx = value ? (1<<8) : 0;
+       args.ecx = args.edx = 0;
+
+       switch (cap) {
+       case ACER_CAP_MAILLED:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               args.ebx |= ACER_AMW0_MAILLED_MASK;
+               break;
+       case ACER_CAP_WIRELESS:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               args.ebx |= ACER_AMW0_WIRELESS_MASK;
+               break;
+       case ACER_CAP_BLUETOOTH:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+               break;
+       case ACER_CAP_BRIGHTNESS:
+               if (value > max_brightness)
+                       return AE_BAD_PARAMETER;
+               switch (quirks->brightness) {
+               case 1:
+                       return ec_write(0x83, value);
+               default:
+                       return AE_BAD_ADDRESS;
+               break;
+               }
+       default:
+               return AE_BAD_ADDRESS;
+       }
+
+       /* Actually do the set */
+       return wmab_execute(&args, NULL);
+}
+
+static acpi_status AMW0_find_mailled(void)
+{
+       struct wmab_args args;
+       struct wmab_ret ret;
+       acpi_status status = AE_OK;
+       struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+       union acpi_object *obj;
+
+       args.eax = 0x86;
+       args.ebx = args.ecx = args.edx = 0;
+
+       status = wmab_execute(&args, &out);
+       if (ACPI_FAILURE(status))
+               return status;
+
+       obj = (union acpi_object *) out.pointer;
+       if (obj && obj->type == ACPI_TYPE_BUFFER &&
+       obj->buffer.length == sizeof(struct wmab_ret)) {
+               ret = *((struct wmab_ret *) obj->buffer.pointer);
+       } else {
+               return AE_ERROR;
+       }
+
+       if (ret.eex & 0x1)
+               interface->capability |= ACER_CAP_MAILLED;
+
+       kfree(out.pointer);
+
+       return AE_OK;
+}
+
+static acpi_status AMW0_set_capabilities(void)
+{
+       struct wmab_args args;
+       struct wmab_ret ret;
+       acpi_status status = AE_OK;
+       struct acpi_buffer out = { ACPI_ALLOCATE_BUFFER, NULL };
+       union acpi_object *obj;
+
+       args.eax = ACER_AMW0_WRITE;
+       args.ecx = args.edx = 0;
+
+       args.ebx = 0xa2 << 8;
+       args.ebx |= ACER_AMW0_WIRELESS_MASK;
+
+       status = wmab_execute(&args, &out);
+       if (ACPI_FAILURE(status))
+               return status;
+
+       obj = (union acpi_object *) out.pointer;
+       if (obj && obj->type == ACPI_TYPE_BUFFER &&
+       obj->buffer.length == sizeof(struct wmab_ret)) {
+               ret = *((struct wmab_ret *) obj->buffer.pointer);
+       } else {
+               return AE_ERROR;
+       }
+
+       if (ret.eax & 0x1)
+               interface->capability |= ACER_CAP_WIRELESS;
+
+       args.ebx = 2 << 8;
+       args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+
+       status = wmab_execute(&args, &out);
+       if (ACPI_FAILURE(status))
+               return status;
+
+       obj = (union acpi_object *) out.pointer;
+       if (obj && obj->type == ACPI_TYPE_BUFFER
+       && obj->buffer.length == sizeof(struct wmab_ret)) {
+               ret = *((struct wmab_ret *) obj->buffer.pointer);
+       } else {
+               return AE_ERROR;
+       }
+
+       if (ret.eax & 0x1)
+               interface->capability |= ACER_CAP_BLUETOOTH;
+
+       kfree(out.pointer);
+
+       /*
+        * This appears to be safe to enable, since all Wistron based laptops
+        * appear to use the same EC register for brightness, even if they
+        * differ for wireless, etc
+        */
+       interface->capability |= ACER_CAP_BRIGHTNESS;
+
+       return AE_OK;
+}
+
+static struct wmi_interface AMW0_interface = {
+       .type = ACER_AMW0,
+};
+
+static struct wmi_interface AMW0_V2_interface = {
+       .type = ACER_AMW0_V2,
+};
+
+/*
+ * New interface (The WMID interface)
+ */
+static acpi_status
+WMI_execute_u32(u32 method_id, u32 in, u32 *out)
+{
+       struct acpi_buffer input = { (acpi_size) sizeof(u32), (void *)(&in) };
+       struct acpi_buffer result = { ACPI_ALLOCATE_BUFFER, NULL };
+       union acpi_object *obj;
+       u32 tmp;
+       acpi_status status;
+
+       status = wmi_evaluate_method(WMID_GUID1, 1, method_id, &input, &result);
+
+       if (ACPI_FAILURE(status))
+               return status;
+
+       obj = (union acpi_object *) result.pointer;
+       if (obj && obj->type == ACPI_TYPE_BUFFER &&
+               obj->buffer.length == sizeof(u32)) {
+               tmp = *((u32 *) obj->buffer.pointer);
+       } else {
+               tmp = 0;
+       }
+
+       if (out)
+               *out = tmp;
+
+       kfree(result.pointer);
+
+       return status;
+}
+
+static acpi_status WMID_get_u32(u32 *value, u32 cap,
+struct wmi_interface *iface)
+{
+       acpi_status status;
+       u8 tmp;
+       u32 result, method_id = 0;
+
+       switch (cap) {
+       case ACER_CAP_WIRELESS:
+               method_id = ACER_WMID_GET_WIRELESS_METHODID;
+               break;
+       case ACER_CAP_BLUETOOTH:
+               method_id = ACER_WMID_GET_BLUETOOTH_METHODID;
+               break;
+       case ACER_CAP_BRIGHTNESS:
+               method_id = ACER_WMID_GET_BRIGHTNESS_METHODID;
+               break;
+       case ACER_CAP_THREEG:
+               method_id = ACER_WMID_GET_THREEG_METHODID;
+               break;
+       case ACER_CAP_MAILLED:
+               if (quirks->mailled == 1) {
+                       ec_read(0x9f, &tmp);
+                       *value = tmp & 0x1;
+                       return 0;
+               }
+       default:
+               return AE_BAD_ADDRESS;
+       }
+       status = WMI_execute_u32(method_id, 0, &result);
+
+       if (ACPI_SUCCESS(status))
+               *value = (u8)result;
+
+       return status;
+}
+
+static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface 
*iface)
+{
+       u32 method_id = 0;
+       char param;
+
+       switch (cap) {
+       case ACER_CAP_BRIGHTNESS:
+               if (value > max_brightness)
+                       return AE_BAD_PARAMETER;
+               method_id = ACER_WMID_SET_BRIGHTNESS_METHODID;
+               break;
+       case ACER_CAP_WIRELESS:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               method_id = ACER_WMID_SET_WIRELESS_METHODID;
+               break;
+       case ACER_CAP_BLUETOOTH:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               method_id = ACER_WMID_SET_BLUETOOTH_METHODID;
+               break;
+       case ACER_CAP_THREEG:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               method_id = ACER_WMID_SET_THREEG_METHODID;
+               break;
+       case ACER_CAP_MAILLED:
+               if (value > 1)
+                       return AE_BAD_PARAMETER;
+               if (quirks->mailled == 1) {
+                       param = value ? 0x92 : 0x93;
+                       i8042_command(&param, 0x1059);
+                       return 0;
+               }
+               break;
+       default:
+               return AE_BAD_ADDRESS;
+       }
+       return WMI_execute_u32(method_id, (u32)value, NULL);
+}
+
+static acpi_status WMID_set_capabilities(void)
+{
+       struct acpi_buffer out = {ACPI_ALLOCATE_BUFFER, NULL};
+       union acpi_object *obj;
+       acpi_status status;
+       u32 devices;
+
+       status = wmi_query_block(WMID_GUID2, 1, &out);
+       if (ACPI_FAILURE(status))
+               return status;
+
+       obj = (union acpi_object *) out.pointer;
+       if (obj && obj->type == ACPI_TYPE_BUFFER &&
+               obj->buffer.length == sizeof(u32)) {
+               devices = *((u32 *) obj->buffer.pointer);
+       } else {
+               return AE_ERROR;
+       }
+
+       /* Not sure on the meaning of the relevant bits yet to detect these */
+       interface->capability |= ACER_CAP_WIRELESS;
+       interface->capability |= ACER_CAP_THREEG;
+
+       /* WMID always provides brightness methods */
+       interface->capability |= ACER_CAP_BRIGHTNESS;
+
+       if (devices & 0x10)
+               interface->capability |= ACER_CAP_BLUETOOTH;
+
+       if (!(devices & 0x20))
+               max_brightness = 0x9;
+
+       return status;
+}
+
+static struct wmi_interface wmid_interface = {
+       .type = ACER_WMID,
+};
+
+/*
+ * Generic Device (interface-independent)
+ */
+
+static acpi_status get_u32(u32 *value, u32 cap)
+{
+       acpi_status status = AE_BAD_ADDRESS;
+
+       switch (interface->type) {
+       case ACER_AMW0:
+               status = AMW0_get_u32(value, cap, interface);
+               break;
+       case ACER_AMW0_V2:
+               if (cap == ACER_CAP_MAILLED) {
+                       status = AMW0_get_u32(value, cap, interface);
+                       break;
+               }
+       case ACER_WMID:
+               status = WMID_get_u32(value, cap, interface);
+               break;
+       }
+
+       return status;
+}
+
+static acpi_status set_u32(u32 value, u32 cap)
+{
+       if (interface->capability & cap) {
+               switch (interface->type) {
+               case ACER_AMW0:
+                       return AMW0_set_u32(value, cap, interface);
+               case ACER_AMW0_V2:
+               case ACER_WMID:
+                       return WMID_set_u32(value, cap, interface);
+               default:
+                       return AE_BAD_PARAMETER;
+               }
+       }
+       return AE_BAD_PARAMETER;
+}
+
+static void __init acer_commandline_init(void)
+{
+       /*
+        * These will all fail silently if the value given is invalid, or the
+        * capability isn't available on the given interface
+        */
+       set_u32(mailled, ACER_CAP_MAILLED);
+       set_u32(wireless, ACER_CAP_WIRELESS);
+       set_u32(bluetooth, ACER_CAP_BLUETOOTH);
+       set_u32(threeg, ACER_CAP_THREEG);
+       set_u32(brightness, ACER_CAP_BRIGHTNESS);
+}
+
+/*
+ * LED device (Mail LED only, no other LEDs known yet)
+ */
+static void mail_led_set(struct led_classdev *led_cdev,
+enum led_brightness value)
+{
+       set_u32(value, ACER_CAP_MAILLED);
+}
+
+static struct led_classdev mail_led = {
+       .name = "acer-mail:green",
+       .brightness_set = mail_led_set,
+};
+
+static int __init acer_led_init(struct device *dev)
+{
+       return led_classdev_register(dev, &mail_led);
+}
+
+static void acer_led_exit(void)
+{
+       led_classdev_unregister(&mail_led);
+}
+
+/*
+ * Backlight device
+ */
+static struct backlight_device *acer_backlight_device;
+
+static int read_brightness(struct backlight_device *bd)
+{
+       u32 value;
+       get_u32(&value, ACER_CAP_BRIGHTNESS);
+       return value;
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+       set_u32(bd->props.brightness, ACER_CAP_BRIGHTNESS);
+       return 0;
+}
+
+static struct backlight_ops acer_bl_ops = {
+       .get_brightness = read_brightness,
+       .update_status = update_bl_status,
+};
+
+static int __init acer_backlight_init(struct device *dev)
+{
+       struct backlight_device *bd;
+
+       bd = backlight_device_register("acer-wmi", dev, NULL, &acer_bl_ops);
+       if (IS_ERR(bd)) {
+               printk(ACER_ERR "Could not register Acer backlight device\n");
+               acer_backlight_device = NULL;
+               return PTR_ERR(bd);
+       }
+
+       acer_backlight_device = bd;
+
+       bd->props.max_brightness = max_brightness;
+       bd->props.brightness = read_brightness(NULL);
+       backlight_update_status(bd);
+       return 0;
+}
+
+static void __exit acer_backlight_exit(void)
+{
+       backlight_device_unregister(acer_backlight_device);
+}
+
+/*
+ * Read/ write bool sysfs macro
+ */
+#define show_set_bool(value, cap) \
+static ssize_t \
+show_bool_##value(struct device *dev, struct device_attribute *attr, \
+       char *buf) \
+{ \
+       u32 result; \
+       acpi_status status = get_u32(&result, cap); \
+       if (ACPI_SUCCESS(status)) \
+               return sprintf(buf, "%u\n", result); \
+       return sprintf(buf, "Read error\n"); \
+} \
+\
+static ssize_t \
+set_bool_##value(struct device *dev, struct device_attribute *attr, \
+       const char *buf, size_t count) \
+{ \
+       u32 tmp = simple_strtoul(buf, NULL, 10); \
+       acpi_status status = set_u32(tmp, cap); \
+               if (ACPI_FAILURE(status)) \
+                       return -EINVAL; \
+       return count; \
+} \
+static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
+       show_bool_##value, set_bool_##value);
+
+show_set_bool(wireless, ACER_CAP_WIRELESS);
+show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
+show_set_bool(threeg, ACER_CAP_THREEG);
+
+/*
+ * Read interface sysfs macro
+ */
+static ssize_t show_interface(struct device *dev, struct device_attribute 
*attr,
+       char *buf)
+{
+       switch (interface->type) {
+       case ACER_AMW0:
+               return sprintf(buf, "AMW0\n");
+       case ACER_AMW0_V2:
+               return sprintf(buf, "AMW0 v2\n");
+       case ACER_WMID:
+               return sprintf(buf, "WMID\n");
+       default:
+               return sprintf(buf, "Error!\n");
+       }
+}
+
+static DEVICE_ATTR(interface, S_IWUGO | S_IRUGO | S_IWUSR,
+       show_interface, NULL);
+
+/*
+ * Platform device
+ */
+static int __devinit acer_platform_probe(struct platform_device *device)
+{
+       int err;
+
+       if (has_cap(ACER_CAP_MAILLED)) {
+               err = acer_led_init(&device->dev);
+               if (err)
+                       goto error_mailled;
+       }
+
+       if (has_cap(ACER_CAP_BRIGHTNESS)) {
+               err = acer_backlight_init(&device->dev);
+               if (err)
+                       goto error_brightness;
+       }
+
+       return 0;
+
+error_brightness:
+       acer_led_exit();
+error_mailled:
+       return err;
+}
+
+static int acer_platform_remove(struct platform_device *device)
+{
+       if (has_cap(ACER_CAP_MAILLED))
+               acer_led_exit();
+       if (has_cap(ACER_CAP_BRIGHTNESS))
+               acer_backlight_exit();
+       return 0;
+}
+
+static int acer_platform_suspend(struct platform_device *dev,
+pm_message_t state)
+{
+       u32 value;
+       struct acer_data *data = &interface->data;
+
+       if (!data)
+               return -ENOMEM;
+
+       if (has_cap(ACER_CAP_WIRELESS)) {
+               get_u32(&value, ACER_CAP_WIRELESS);
+               data->wireless = value;
+       }
+
+       if (has_cap(ACER_CAP_BLUETOOTH)) {
+               get_u32(&value, ACER_CAP_BLUETOOTH);
+               data->bluetooth = value;
+       }
+
+       if (has_cap(ACER_CAP_MAILLED)) {
+               get_u32(&value, ACER_CAP_MAILLED);
+               data->mailled = value;
+       }
+
+       if (has_cap(ACER_CAP_BRIGHTNESS)) {
+               get_u32(&value, ACER_CAP_BRIGHTNESS);
+               data->brightness = value;
+       }
+
+       return 0;
+}
+
+static int acer_platform_resume(struct platform_device *device)
+{
+       struct acer_data *data = &interface->data;
+
+       if (!data)
+               return -ENOMEM;
+
+       if (has_cap(ACER_CAP_WIRELESS))
+               set_u32(data->wireless, ACER_CAP_WIRELESS);
+
+       if (has_cap(ACER_CAP_BLUETOOTH))
+               set_u32(data->bluetooth, ACER_CAP_BLUETOOTH);
+
+       if (has_cap(ACER_CAP_THREEG))
+               set_u32(data->threeg, ACER_CAP_THREEG);
+
+       if (has_cap(ACER_CAP_MAILLED))
+               set_u32(data->mailled, ACER_CAP_MAILLED);
+
+       if (has_cap(ACER_CAP_BRIGHTNESS))
+               set_u32(data->brightness, ACER_CAP_BRIGHTNESS);
+
+       return 0;
+}
+
+static struct platform_driver acer_platform_driver = {
+       .driver = {
+               .name = "acer-wmi",
+               .owner = THIS_MODULE,
+       },
+       .probe = acer_platform_probe,
+       .remove = acer_platform_remove,
+       .suspend = acer_platform_suspend,
+       .resume = acer_platform_resume,
+};
+
+static struct platform_device *acer_platform_device;
+
+static int remove_sysfs(struct platform_device *device)
+{
+       if (has_cap(ACER_CAP_WIRELESS))
+               device_remove_file(&device->dev, &dev_attr_wireless);
+
+       if (has_cap(ACER_CAP_BLUETOOTH))
+               device_remove_file(&device->dev, &dev_attr_bluetooth);
+
+       if (has_cap(ACER_CAP_THREEG))
+               device_remove_file(&device->dev, &dev_attr_threeg);
+
+       device_remove_file(&device->dev, &dev_attr_interface);
+
+       return 0;
+}
+
+static int create_sysfs(void)
+{
+       int retval = -ENOMEM;
+
+       if (has_cap(ACER_CAP_WIRELESS)) {
+               retval = device_create_file(&acer_platform_device->dev,
+                       &dev_attr_wireless);
+               if (retval)
+                       goto error_sysfs;
+       }
+
+       if (has_cap(ACER_CAP_BLUETOOTH)) {
+               retval = device_create_file(&acer_platform_device->dev,
+                       &dev_attr_bluetooth);
+               if (retval)
+                       goto error_sysfs;
+       }
+
+       if (has_cap(ACER_CAP_THREEG)) {
+               retval = device_create_file(&acer_platform_device->dev,
+                       &dev_attr_threeg);
+               if (retval)
+                       goto error_sysfs;
+       }
+
+       retval = device_create_file(&acer_platform_device->dev,
+               &dev_attr_interface);
+       if (retval)
+               goto error_sysfs;
+
+       return 0;
+
+error_sysfs:
+               remove_sysfs(acer_platform_device);
+       return retval;
+}
+
+static int __init acer_wmi_init(void)
+{
+       int err;
+
+       printk(ACER_INFO "Acer Laptop ACPI-WMI Extras version %s\n",
+                       ACER_WMI_VERSION);
+
+       /*
+        * Detect which ACPI-WMI interface we're using.
+        */
+       if (wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
+               interface = &AMW0_V2_interface;
+
+       if (!wmi_has_guid(AMW0_GUID1) && wmi_has_guid(WMID_GUID1))
+               interface = &wmid_interface;
+
+       if (wmi_has_guid(WMID_GUID2) && interface) {
+               if (ACPI_FAILURE(WMID_set_capabilities())) {
+                       printk(ACER_ERR "Unable to detect available devices\n");
+                       return -ENODEV;
+               }
+       } else if (!wmi_has_guid(WMID_GUID2) && interface) {
+               printk(ACER_ERR "Unable to detect available devices\n");
+               return -ENODEV;
+       }
+
+       if (wmi_has_guid(AMW0_GUID1) && !wmi_has_guid(WMID_GUID1)) {
+               interface = &AMW0_interface;
+
+               if (ACPI_FAILURE(AMW0_set_capabilities())) {
+                       printk(ACER_ERR "Unable to detect available devices\n");
+                       return -ENODEV;
+               }
+       }
+
+       if (wmi_has_guid(AMW0_GUID1)) {
+               if (ACPI_FAILURE(AMW0_find_mailled()))
+                       printk(ACER_ERR "Unable to detect mail LED\n");
+       }
+
+       find_quirks();
+
+       if (!interface) {
+               printk(ACER_ERR "No or unsupported WMI interface, unable to ");
+               printk(KERN_CONT "load.\n");
+               return -ENODEV;
+       }
+
+       if (platform_driver_register(&acer_platform_driver)) {
+               printk(ACER_ERR "Unable to register platform driver.\n");
+               goto error_platform_register;
+       }
+       acer_platform_device = platform_device_alloc("acer-wmi", -1);
+       platform_device_add(acer_platform_device);
+
+       err = create_sysfs();
+       if (err)
+               return err;
+
+       /* Override any initial settings with values from the commandline */
+       acer_commandline_init();
+
+       return 0;
+
+error_platform_register:
+       return -ENODEV;
+}
+
+static void __exit acer_wmi_exit(void)
+{
+       remove_sysfs(acer_platform_device);
+       platform_device_del(acer_platform_device);
+       platform_driver_unregister(&acer_platform_driver);
+
+       printk(ACER_INFO "Acer Laptop WMI Extras unloaded\n");
+       return;
+}
+
+module_init(acer_wmi_init);
+module_exit(acer_wmi_exit);
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