2.6.25-rc5

 drivers

 misc

diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
new file mode 100644
index 0000000..74d12b4
--- /dev/null
+++ b/drivers/misc/acer-wmi.c
@@ -0,0 +1,1116 @@
+/*
+ *  Acer WMI Laptop Extras
+ *
+ *  Copyright (C) 2007-2008   Carlos Corbacho <carlos@strangeworlds.co.uk>
+ *
+ *  Based on acer_acpi:
+ *    Copyright (C) 2005-2007   E.M. Smith
+ *    Copyright (C) 2007-2008   Carlos Corbacho <cathectic@gmail.com>
+ *
+ *  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 = "Acer TravelMate 4200",
+      .matches = {
+         DMI_MATCH(DMI_SYS_VENDOR, "Acer"),
+         DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4200"),
+      },
+      .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) {
+      default:
+         return ec_write(0x83, value);
+         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(¶m, 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);