Added documentation for new WMAX interface, present on some Alienware
X-Series, Alienware M-Series and Dell's G-Series laptops.

Signed-off-by: Kurt Borja <kuurtb@gmail.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
---
v8:
 - Unchanged
v7:
 - Added GameShiftStatus method to documentation
 - Added remark about operation 0x03 of Thermal_Information method
 - Removed undocumented methods
v6:
 - Fixed typos
 - Included new file in MAINTAINERS
---
 Documentation/wmi/devices/alienware-wmi.rst | 388 ++++++++++++++++++++
 MAINTAINERS                                 |   1 +
 2 files changed, 389 insertions(+)
 create mode 100644 Documentation/wmi/devices/alienware-wmi.rst

diff --git a/Documentation/wmi/devices/alienware-wmi.rst b/Documentation/wmi/devices/alienware-wmi.rst
new file mode 100644
index 000000000..36a67ff9a
--- /dev/null
+++ b/Documentation/wmi/devices/alienware-wmi.rst
@@ -0,0 +1,388 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+==============================================
+Dell AWCC WMI interface driver (alienware-wmi)
+==============================================
+
+Introduction
+============
+
+The WMI device WMAX has been implemented for many Alienware and Dell's G-Series
+models. Throughout these models, two implementations have been identified. The
+first one, used by older systems, deals with HDMI, brightness, RGB, amplifier
+and deep sleep control. The second one used by newer systems deals primarily
+with thermal, overclocking, and GPIO control.
+
+It is suspected that the latter is used by Alienware Command Center (AWCC) to
+manage manufacturer predefined thermal profiles. The alienware-wmi driver
+exposes Thermal_Information and Thermal_Control methods through the Platform
+Profile API to mimic AWCC's behavior.
+
+This newer interface, named AWCCMethodFunction has been reverse engineered, as
+Dell has not provided any official documentation. We will try to describe to the
+best of our ability its discovered inner workings.
+
+.. note::
+   The following method description may be incomplete and some operations have
+   different implementations between devices.
+
+WMI interface description
+-------------------------
+
+The WMI interface description can be decoded from the embedded binary MOF (bmof)
+data using the `bmfdec <https://github.com/pali/bmfdec>`_ utility:
+
+::
+
+ [WMI, Dynamic, Provider("WmiProv"), Locale("MS\\0x409"), Description("WMI Function"), guid("{A70591CE-A997-11DA-B012-B622A1EF5492}")]
+ class AWCCWmiMethodFunction {
+   [key, read] string InstanceName;
+   [read] boolean Active;
+
+   [WmiMethodId(13), Implemented, read, write, Description("Return Overclocking Report.")] void Return_OverclockingReport([out] uint32 argr);
+   [WmiMethodId(14), Implemented, read, write, Description("Set OCUIBIOS Control.")] void Set_OCUIBIOSControl([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(15), Implemented, read, write, Description("Clear OC FailSafe Flag.")] void Clear_OCFailSafeFlag([out] uint32 argr);
+   [WmiMethodId(19), Implemented, read, write, Description("Get Fan Sensors.")] void GetFanSensors([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(20), Implemented, read, write, Description("Thermal Information.")] void Thermal_Information([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(21), Implemented, read, write, Description("Thermal Control.")] void Thermal_Control([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(23), Implemented, read, write, Description("MemoryOCControl.")] void MemoryOCControl([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(26), Implemented, read, write, Description("System Information.")] void SystemInformation([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(28), Implemented, read, write, Description("Power Information.")] void PowerInformation([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(32), Implemented, read, write, Description("FW Update GPIO toggle.")] void FWUpdateGPIOtoggle([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(33), Implemented, read, write, Description("Read Total of GPIOs.")] void ReadTotalofGPIOs([out] uint32 argr);
+   [WmiMethodId(34), Implemented, read, write, Description("Read GPIO pin Status.")] void ReadGPIOpPinStatus([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(35), Implemented, read, write, Description("Read Chassis Color.")] void ReadChassisColor([out] uint32 argr);
+   [WmiMethodId(36), Implemented, read, write, Description("Read Platform Properties.")] void ReadPlatformProperties([out] uint32 argr);
+   [WmiMethodId(37), Implemented, read, write, Description("Game Shift Status.")] void GameShiftStatus([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(128), Implemented, read, write, Description("Caldera SW installation.")] void CalderaSWInstallation([out] uint32 argr);
+   [WmiMethodId(129), Implemented, read, write, Description("Caldera SW is released.")] void CalderaSWReleased([out] uint32 argr);
+   [WmiMethodId(130), Implemented, read, write, Description("Caldera Connection Status.")] void CalderaConnectionStatus([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(131), Implemented, read, write, Description("Surprise Unplugged Flag Status.")] void SurpriseUnpluggedFlagStatus([out] uint32 argr);
+   [WmiMethodId(132), Implemented, read, write, Description("Clear Surprise Unplugged Flag.")] void ClearSurpriseUnpluggedFlag([out] uint32 argr);
+   [WmiMethodId(133), Implemented, read, write, Description("Cancel Undock Request.")] void CancelUndockRequest([out] uint32 argr);
+   [WmiMethodId(135), Implemented, read, write, Description("Devices in Caldera.")] void DevicesInCaldera([in] uint32 arg2, [out] uint32 argr);
+   [WmiMethodId(136), Implemented, read, write, Description("Notify BIOS for SW ready to disconnect Caldera.")] void NotifyBIOSForSWReadyToDisconnectCaldera([out] uint32 argr);
+   [WmiMethodId(160), Implemented, read, write, Description("Tobii SW installation.")] void TobiiSWinstallation([out] uint32 argr);
+   [WmiMethodId(161), Implemented, read, write, Description("Tobii SW Released.")] void TobiiSWReleased([out] uint32 argr);
+   [WmiMethodId(162), Implemented, read, write, Description("Tobii Camera Power Reset.")] void TobiiCameraPowerReset([out] uint32 argr);
+   [WmiMethodId(163), Implemented, read, write, Description("Tobii Camera Power On.")] void TobiiCameraPowerOn([out] uint32 argr);
+   [WmiMethodId(164), Implemented, read, write, Description("Tobii Camera Power Off.")] void TobiiCameraPowerOff([out] uint32 argr);
+ };
+
+Some of these methods get quite intricate so we will describe them using
+pseudo-code that vaguely resembles the original ASL code.
+
+Methods not described in the following document have unknown behavior.
+
+Argument Structure
+------------------
+
+All input arguments have type **uint32** and their structure is very similar
+between methods. Usually, the first byte corresponds to a specific *operation*
+the method performs, and the subsequent bytes correspond to *arguments* passed
+to this *operation*. For example, if an operation has code 0x01 and requires an
+ID 0xA0, the argument you would pass to the method is 0xA001.
+
+
+Thermal Methods
+===============
+
+WMI method Thermal_Information([in] uint32 arg2, [out] uint32 argr)
+-------------------------------------------------------------------
+
+::
+
+ if BYTE_0(arg2) == 0x01:
+         argr = 1
+
+ if BYTE_0(arg2) == 0x02:
+         argr = UNKNOWN_CONSTANT
+
+ if BYTE_0(arg2) == 0x03:
+         if BYTE_1(arg2) == 0x00:
+                 argr = FAN_ID_0
+
+         if BYTE_1(arg2) == 0x01:
+                 argr = FAN_ID_1
+
+         if BYTE_1(arg2) == 0x02:
+                 argr = FAN_ID_2
+
+         if BYTE_1(arg2) == 0x03:
+                 argr = FAN_ID_3
+
+         if BYTE_1(arg2) == 0x04:
+                 argr = SENSOR_ID_CPU | 0x0100
+
+         if BYTE_1(arg2) == 0x05:
+                 argr = SENSOR_ID_GPU | 0x0100
+
+         if BYTE_1(arg2) == 0x06:
+                 argr = THERMAL_MODE_QUIET_ID
+
+         if BYTE_1(arg2) == 0x07:
+                 argr = THERMAL_MODE_BALANCED_ID
+
+         if BYTE_1(arg2) == 0x08:
+                 argr = THERMAL_MODE_BALANCED_PERFORMANCE_ID
+
+         if BYTE_1(arg2) == 0x09:
+                 argr = THERMAL_MODE_PERFORMANCE_ID
+
+         if BYTE_1(arg2) == 0x0A:
+                 argr = THERMAL_MODE_LOW_POWER_ID
+
+         if BYTE_1(arg2) == 0x0B:
+                 argr = THERMAL_MODE_GMODE_ID
+
+         else:
+                 argr = 0xFFFFFFFF
+
+ if BYTE_0(arg2) == 0x04:
+         if is_valid_sensor(BYTE_1(arg2)):
+                 argr = SENSOR_TEMP_C
+         else:
+                 argr = 0xFFFFFFFF
+
+ if BYTE_0(arg2) == 0x05:
+         if is_valid_fan(BYTE_1(arg2)):
+                 argr = FAN_RPM()
+
+ if BYTE_0(arg2) == 0x06:
+         skip
+
+ if BYTE_0(arg2) == 0x07:
+         argr = 0
+
+ If BYTE_0(arg2) == 0x08:
+         if is_valid_fan(BYTE_1(arg2)):
+                 argr = 0
+         else:
+                 argr = 0xFFFFFFFF
+
+ if BYTE_0(arg2) == 0x09:
+         if is_valid_fan(BYTE_1(arg2)):
+                 argr = FAN_UNKNOWN_STAT_0()
+
+         else:
+                 argr = 0xFFFFFFFF
+
+ if BYTE_0(arg2) == 0x0A:
+         argr = THERMAL_MODE_BALANCED_ID
+
+ if BYTE_0(arg2) == 0x0B:
+         argr = CURRENT_THERMAL_MODE()
+
+ if BYTE_0(arg2) == 0x0C:
+         if is_valid_fan(BYTE_1(arg2)):
+                 argr = FAN_UNKNOWN_STAT_1()
+         else:
+                 argr = 0xFFFFFFFF
+
+Operation 0x03 list all available fan IDs, sensor IDs and thermal profile
+codes in order, but different models may have different number of fans and
+thermal profiles. These are the known ranges:
+
+* Fan IDs: from 2 up to 4
+* Sensor IDs: 2
+* Thermal profile codes: from 1 up to 7
+
+In total BYTE_1(ARG2) may range from 0x5 up to 0xD depending on the model.
+
+WMI method Thermal_Control([in] uint32 arg2, [out] uint32 argr)
+---------------------------------------------------------------
+
+::
+
+ if BYTE_0(arg2) == 0x01:
+         if is_valid_thermal_profile(BYTE_1(arg2)):
+                 SET_THERMAL_PROFILE(BYTE_1(arg2))
+                 argr = 0
+
+ if BYTE_0(arg2) == 0x02:
+         if is_valid_fan(BYTE_1(arg2)):
+                 SET_FAN_SPEED_MULTIPLIER(BYTE_2(arg2))
+                 argr = 0
+         else:
+                 argr = 0xFFFFFFFF
+
+.. note::
+   While you can manually change the fan speed multiplier with this method,
+   Dell's BIOS tends to overwrite this changes anyway.
+
+These are the known thermal profile codes:
+
+::
+
+ CUSTOM                         0x00
+
+ BALANCED_USTT                  0xA0
+ BALANCED_PERFORMANCE_USTT      0xA1
+ COOL_USTT                      0xA2
+ QUIET_USTT                     0xA3
+ PERFORMANCE_USTT               0xA4
+ LOW_POWER_USTT                 0xA5
+
+ QUIET                          0x96
+ BALANCED                       0x97
+ BALANCED_PERFORMANCE           0x98
+ PERFORMANCE                    0x99
+
+ GMODE                          0xAB
+
+Usually if a model doesn't support the first four profiles they will support
+the User Selectable Thermal Tables (USTT) profiles and vice-versa.
+
+GMODE replaces PERFORMANCE in G-Series laptops.
+
+WMI method GameShiftStatus([in] uint32 arg2, [out] uint32 argr)
+---------------------------------------------------------------
+
+::
+
+ if BYTE_0(arg2) == 0x1:
+         TOGGLE_GAME_SHIFT()
+         argr = GET_GAME_SHIFT_STATUS()
+
+ if BYTE_0(arg2) == 0x2:
+         argr = GET_GAME_SHIFT_STATUS()
+
+Game Shift Status does not change the fan speed profile but it could be some
+sort of CPU/GPU power profile. Benchmarks have not been done.
+
+This method is only present on Dell's G-Series laptops and it's implementation
+implies GMODE thermal profile is available, even if operation 0x03 of
+Thermal_Information does not list it.
+
+G-key on Dell's G-Series laptops also changes Game Shift status, so both are
+directly related.
+
+WMI method GetFanSensors([in] uint32 arg2, [out] uint32 argr)
+-------------------------------------------------------------
+
+::
+
+ if BYTE_0(arg2) == 0x1:
+        if is_valid_fan(BYTE_1(arg2)):
+                argr = 1
+        else:
+                argr = 0
+
+ if BYTE_0(arg2) == 0x2:
+        if is_valid_fan(BYTE_1(arg2)):
+                if BYTE_2(arg2) == 0:
+                        argr == SENSOR_ID
+                else
+                        argr == 0xFFFFFFFF
+        else:
+                argr = 0
+
+Overclocking Methods
+====================
+
+.. warning::
+   These methods have not been tested and are only partially reverse
+   engineered.
+
+WMI method Return_OverclockingReport([out] uint32 argr)
+-------------------------------------------------------
+
+::
+
+ CSMI (0xE3, 0x99)
+ argr = 0
+
+CSMI is an unknown operation.
+
+WMI method Set_OCUIBIOSControl([in] uint32 arg2, [out] uint32 argr)
+-------------------------------------------------------------------
+
+::
+
+ CSMI (0xE3, 0x99)
+ argr = 0
+
+CSMI is an unknown operation.
+
+WMI method Clear_OCFailSafeFlag([out] uint32 argr)
+--------------------------------------------------
+
+::
+
+ CSMI (0xE3, 0x99)
+ argr = 0
+
+CSMI is an unknown operation.
+
+
+WMI method MemoryOCControl([in] uint32 arg2, [out] uint32 argr)
+---------------------------------------------------------------
+
+AWCC supports memory overclocking, but this method is very intricate and has
+not been deciphered yet.
+
+GPIO methods
+============
+
+These methods are probably related to some kind of firmware update system,
+through a GPIO device.
+
+.. warning::
+   These methods have not been tested and are only partially reverse
+   engineered.
+
+WMI method FWUpdateGPIOtoggle([in] uint32 arg2, [out] uint32 argr)
+------------------------------------------------------------------
+
+::
+
+ if BYTE_0(arg2) == 0:
+         if BYTE_1(arg2) == 1:
+                 SET_PIN_A_HIGH()
+         else:
+                 SET_PIN_A_LOW()
+
+ if BYTE_0(arg2) == 1:
+         if BYTE_1(arg2) == 1:
+                 SET_PIN_B_HIGH()
+
+         else:
+                 SET_PIN_B_LOW()
+
+ else:
+         argr = 1
+
+WMI method ReadTotalofGPIOs([out] uint32 argr)
+----------------------------------------------
+
+::
+
+ argr = 0x02
+
+WMI method ReadGPIOpPinStatus([in] uint32 arg2, [out] uint32 argr)
+------------------------------------------------------------------
+
+::
+
+ if BYTE_0(arg2) == 0:
+         argr = PIN_A_STATUS
+
+ if BYTE_0(arg2) == 1:
+         argr = PIN_B_STATUS
+
+Other information Methods
+=========================
+
+WMI method ReadChassisColor([out] uint32 argr)
+----------------------------------------------
+
+::
+
+ argr = CHASSIS_COLOR_ID
+
+Acknowledgements
+================
+
+Kudos to `AlexIII <https://github.com/AlexIII/tcc-g15>`_ for documenting
+and testing available thermal profile codes.
+
diff --git a/MAINTAINERS b/MAINTAINERS
index c27f31907..25f6de4c2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -792,6 +792,7 @@ F:	drivers/perf/alibaba_uncore_drw_pmu.c
 ALIENWARE WMI DRIVER
 L:	Dell.Client.Kernel@dell.com
 S:	Maintained
+F:	Documentation/wmi/devices/alienware-wmi.rst
 F:	drivers/platform/x86/dell/alienware-wmi.c
 
 ALLEGRO DVT VIDEO IP CORE DRIVER
-- 
2.47.0

On Thu, 24 Oct 2024, Kurt Borja wrote:

> Added documentation for new WMAX interface, present on some Alienware
> X-Series, Alienware M-Series and Dell's G-Series laptops.
> 
> Signed-off-by: Kurt Borja <kuurtb@gmail.com>
> Reviewed-by: Armin Wolf <W_Armin@gmx.de>

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>

--
 i.

> ---
> v8:
>  - Unchanged
> v7:
>  - Added GameShiftStatus method to documentation
>  - Added remark about operation 0x03 of Thermal_Information method
>  - Removed undocumented methods
> v6:
>  - Fixed typos
>  - Included new file in MAINTAINERS
> ---
>  Documentation/wmi/devices/alienware-wmi.rst | 388 ++++++++++++++++++++
>  MAINTAINERS                                 |   1 +
>  2 files changed, 389 insertions(+)
>  create mode 100644 Documentation/wmi/devices/alienware-wmi.rst
> 
> diff --git a/Documentation/wmi/devices/alienware-wmi.rst b/Documentation/wmi/devices/alienware-wmi.rst
> new file mode 100644
> index 000000000..36a67ff9a
> --- /dev/null
> +++ b/Documentation/wmi/devices/alienware-wmi.rst
> @@ -0,0 +1,388 @@
> +.. SPDX-License-Identifier: GPL-2.0-or-later
> +
> +==============================================
> +Dell AWCC WMI interface driver (alienware-wmi)
> +==============================================
> +
> +Introduction
> +============
> +
> +The WMI device WMAX has been implemented for many Alienware and Dell's G-Series
> +models. Throughout these models, two implementations have been identified. The
> +first one, used by older systems, deals with HDMI, brightness, RGB, amplifier
> +and deep sleep control. The second one used by newer systems deals primarily
> +with thermal, overclocking, and GPIO control.
> +
> +It is suspected that the latter is used by Alienware Command Center (AWCC) to
> +manage manufacturer predefined thermal profiles. The alienware-wmi driver
> +exposes Thermal_Information and Thermal_Control methods through the Platform
> +Profile API to mimic AWCC's behavior.
> +
> +This newer interface, named AWCCMethodFunction has been reverse engineered, as
> +Dell has not provided any official documentation. We will try to describe to the
> +best of our ability its discovered inner workings.
> +
> +.. note::
> +   The following method description may be incomplete and some operations have
> +   different implementations between devices.
> +
> +WMI interface description
> +-------------------------
> +
> +The WMI interface description can be decoded from the embedded binary MOF (bmof)
> +data using the `bmfdec <https://github.com/pali/bmfdec>`_ utility:
> +
> +::
> +
> + [WMI, Dynamic, Provider("WmiProv"), Locale("MS\\0x409"), Description("WMI Function"), guid("{A70591CE-A997-11DA-B012-B622A1EF5492}")]
> + class AWCCWmiMethodFunction {
> +   [key, read] string InstanceName;
> +   [read] boolean Active;
> +
> +   [WmiMethodId(13), Implemented, read, write, Description("Return Overclocking Report.")] void Return_OverclockingReport([out] uint32 argr);
> +   [WmiMethodId(14), Implemented, read, write, Description("Set OCUIBIOS Control.")] void Set_OCUIBIOSControl([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(15), Implemented, read, write, Description("Clear OC FailSafe Flag.")] void Clear_OCFailSafeFlag([out] uint32 argr);
> +   [WmiMethodId(19), Implemented, read, write, Description("Get Fan Sensors.")] void GetFanSensors([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(20), Implemented, read, write, Description("Thermal Information.")] void Thermal_Information([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(21), Implemented, read, write, Description("Thermal Control.")] void Thermal_Control([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(23), Implemented, read, write, Description("MemoryOCControl.")] void MemoryOCControl([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(26), Implemented, read, write, Description("System Information.")] void SystemInformation([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(28), Implemented, read, write, Description("Power Information.")] void PowerInformation([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(32), Implemented, read, write, Description("FW Update GPIO toggle.")] void FWUpdateGPIOtoggle([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(33), Implemented, read, write, Description("Read Total of GPIOs.")] void ReadTotalofGPIOs([out] uint32 argr);
> +   [WmiMethodId(34), Implemented, read, write, Description("Read GPIO pin Status.")] void ReadGPIOpPinStatus([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(35), Implemented, read, write, Description("Read Chassis Color.")] void ReadChassisColor([out] uint32 argr);
> +   [WmiMethodId(36), Implemented, read, write, Description("Read Platform Properties.")] void ReadPlatformProperties([out] uint32 argr);
> +   [WmiMethodId(37), Implemented, read, write, Description("Game Shift Status.")] void GameShiftStatus([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(128), Implemented, read, write, Description("Caldera SW installation.")] void CalderaSWInstallation([out] uint32 argr);
> +   [WmiMethodId(129), Implemented, read, write, Description("Caldera SW is released.")] void CalderaSWReleased([out] uint32 argr);
> +   [WmiMethodId(130), Implemented, read, write, Description("Caldera Connection Status.")] void CalderaConnectionStatus([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(131), Implemented, read, write, Description("Surprise Unplugged Flag Status.")] void SurpriseUnpluggedFlagStatus([out] uint32 argr);
> +   [WmiMethodId(132), Implemented, read, write, Description("Clear Surprise Unplugged Flag.")] void ClearSurpriseUnpluggedFlag([out] uint32 argr);
> +   [WmiMethodId(133), Implemented, read, write, Description("Cancel Undock Request.")] void CancelUndockRequest([out] uint32 argr);
> +   [WmiMethodId(135), Implemented, read, write, Description("Devices in Caldera.")] void DevicesInCaldera([in] uint32 arg2, [out] uint32 argr);
> +   [WmiMethodId(136), Implemented, read, write, Description("Notify BIOS for SW ready to disconnect Caldera.")] void NotifyBIOSForSWReadyToDisconnectCaldera([out] uint32 argr);
> +   [WmiMethodId(160), Implemented, read, write, Description("Tobii SW installation.")] void TobiiSWinstallation([out] uint32 argr);
> +   [WmiMethodId(161), Implemented, read, write, Description("Tobii SW Released.")] void TobiiSWReleased([out] uint32 argr);
> +   [WmiMethodId(162), Implemented, read, write, Description("Tobii Camera Power Reset.")] void TobiiCameraPowerReset([out] uint32 argr);
> +   [WmiMethodId(163), Implemented, read, write, Description("Tobii Camera Power On.")] void TobiiCameraPowerOn([out] uint32 argr);
> +   [WmiMethodId(164), Implemented, read, write, Description("Tobii Camera Power Off.")] void TobiiCameraPowerOff([out] uint32 argr);
> + };
> +
> +Some of these methods get quite intricate so we will describe them using
> +pseudo-code that vaguely resembles the original ASL code.
> +
> +Methods not described in the following document have unknown behavior.
> +
> +Argument Structure
> +------------------
> +
> +All input arguments have type **uint32** and their structure is very similar
> +between methods. Usually, the first byte corresponds to a specific *operation*
> +the method performs, and the subsequent bytes correspond to *arguments* passed
> +to this *operation*. For example, if an operation has code 0x01 and requires an
> +ID 0xA0, the argument you would pass to the method is 0xA001.
> +
> +
> +Thermal Methods
> +===============
> +
> +WMI method Thermal_Information([in] uint32 arg2, [out] uint32 argr)
> +-------------------------------------------------------------------
> +
> +::
> +
> + if BYTE_0(arg2) == 0x01:
> +         argr = 1
> +
> + if BYTE_0(arg2) == 0x02:
> +         argr = UNKNOWN_CONSTANT
> +
> + if BYTE_0(arg2) == 0x03:
> +         if BYTE_1(arg2) == 0x00:
> +                 argr = FAN_ID_0
> +
> +         if BYTE_1(arg2) == 0x01:
> +                 argr = FAN_ID_1
> +
> +         if BYTE_1(arg2) == 0x02:
> +                 argr = FAN_ID_2
> +
> +         if BYTE_1(arg2) == 0x03:
> +                 argr = FAN_ID_3
> +
> +         if BYTE_1(arg2) == 0x04:
> +                 argr = SENSOR_ID_CPU | 0x0100
> +
> +         if BYTE_1(arg2) == 0x05:
> +                 argr = SENSOR_ID_GPU | 0x0100
> +
> +         if BYTE_1(arg2) == 0x06:
> +                 argr = THERMAL_MODE_QUIET_ID
> +
> +         if BYTE_1(arg2) == 0x07:
> +                 argr = THERMAL_MODE_BALANCED_ID
> +
> +         if BYTE_1(arg2) == 0x08:
> +                 argr = THERMAL_MODE_BALANCED_PERFORMANCE_ID
> +
> +         if BYTE_1(arg2) == 0x09:
> +                 argr = THERMAL_MODE_PERFORMANCE_ID
> +
> +         if BYTE_1(arg2) == 0x0A:
> +                 argr = THERMAL_MODE_LOW_POWER_ID
> +
> +         if BYTE_1(arg2) == 0x0B:
> +                 argr = THERMAL_MODE_GMODE_ID
> +
> +         else:
> +                 argr = 0xFFFFFFFF
> +
> + if BYTE_0(arg2) == 0x04:
> +         if is_valid_sensor(BYTE_1(arg2)):
> +                 argr = SENSOR_TEMP_C
> +         else:
> +                 argr = 0xFFFFFFFF
> +
> + if BYTE_0(arg2) == 0x05:
> +         if is_valid_fan(BYTE_1(arg2)):
> +                 argr = FAN_RPM()
> +
> + if BYTE_0(arg2) == 0x06:
> +         skip
> +
> + if BYTE_0(arg2) == 0x07:
> +         argr = 0
> +
> + If BYTE_0(arg2) == 0x08:
> +         if is_valid_fan(BYTE_1(arg2)):
> +                 argr = 0
> +         else:
> +                 argr = 0xFFFFFFFF
> +
> + if BYTE_0(arg2) == 0x09:
> +         if is_valid_fan(BYTE_1(arg2)):
> +                 argr = FAN_UNKNOWN_STAT_0()
> +
> +         else:
> +                 argr = 0xFFFFFFFF
> +
> + if BYTE_0(arg2) == 0x0A:
> +         argr = THERMAL_MODE_BALANCED_ID
> +
> + if BYTE_0(arg2) == 0x0B:
> +         argr = CURRENT_THERMAL_MODE()
> +
> + if BYTE_0(arg2) == 0x0C:
> +         if is_valid_fan(BYTE_1(arg2)):
> +                 argr = FAN_UNKNOWN_STAT_1()
> +         else:
> +                 argr = 0xFFFFFFFF
> +
> +Operation 0x03 list all available fan IDs, sensor IDs and thermal profile
> +codes in order, but different models may have different number of fans and
> +thermal profiles. These are the known ranges:
> +
> +* Fan IDs: from 2 up to 4
> +* Sensor IDs: 2
> +* Thermal profile codes: from 1 up to 7
> +
> +In total BYTE_1(ARG2) may range from 0x5 up to 0xD depending on the model.
> +
> +WMI method Thermal_Control([in] uint32 arg2, [out] uint32 argr)
> +---------------------------------------------------------------
> +
> +::
> +
> + if BYTE_0(arg2) == 0x01:
> +         if is_valid_thermal_profile(BYTE_1(arg2)):
> +                 SET_THERMAL_PROFILE(BYTE_1(arg2))
> +                 argr = 0
> +
> + if BYTE_0(arg2) == 0x02:
> +         if is_valid_fan(BYTE_1(arg2)):
> +                 SET_FAN_SPEED_MULTIPLIER(BYTE_2(arg2))
> +                 argr = 0
> +         else:
> +                 argr = 0xFFFFFFFF
> +
> +.. note::
> +   While you can manually change the fan speed multiplier with this method,
> +   Dell's BIOS tends to overwrite this changes anyway.
> +
> +These are the known thermal profile codes:
> +
> +::
> +
> + CUSTOM                         0x00
> +
> + BALANCED_USTT                  0xA0
> + BALANCED_PERFORMANCE_USTT      0xA1
> + COOL_USTT                      0xA2
> + QUIET_USTT                     0xA3
> + PERFORMANCE_USTT               0xA4
> + LOW_POWER_USTT                 0xA5
> +
> + QUIET                          0x96
> + BALANCED                       0x97
> + BALANCED_PERFORMANCE           0x98
> + PERFORMANCE                    0x99
> +
> + GMODE                          0xAB
> +
> +Usually if a model doesn't support the first four profiles they will support
> +the User Selectable Thermal Tables (USTT) profiles and vice-versa.
> +
> +GMODE replaces PERFORMANCE in G-Series laptops.
> +
> +WMI method GameShiftStatus([in] uint32 arg2, [out] uint32 argr)
> +---------------------------------------------------------------
> +
> +::
> +
> + if BYTE_0(arg2) == 0x1:
> +         TOGGLE_GAME_SHIFT()
> +         argr = GET_GAME_SHIFT_STATUS()
> +
> + if BYTE_0(arg2) == 0x2:
> +         argr = GET_GAME_SHIFT_STATUS()
> +
> +Game Shift Status does not change the fan speed profile but it could be some
> +sort of CPU/GPU power profile. Benchmarks have not been done.
> +
> +This method is only present on Dell's G-Series laptops and it's implementation
> +implies GMODE thermal profile is available, even if operation 0x03 of
> +Thermal_Information does not list it.
> +
> +G-key on Dell's G-Series laptops also changes Game Shift status, so both are
> +directly related.
> +
> +WMI method GetFanSensors([in] uint32 arg2, [out] uint32 argr)
> +-------------------------------------------------------------
> +
> +::
> +
> + if BYTE_0(arg2) == 0x1:
> +        if is_valid_fan(BYTE_1(arg2)):
> +                argr = 1
> +        else:
> +                argr = 0
> +
> + if BYTE_0(arg2) == 0x2:
> +        if is_valid_fan(BYTE_1(arg2)):
> +                if BYTE_2(arg2) == 0:
> +                        argr == SENSOR_ID
> +                else
> +                        argr == 0xFFFFFFFF
> +        else:
> +                argr = 0
> +
> +Overclocking Methods
> +====================
> +
> +.. warning::
> +   These methods have not been tested and are only partially reverse
> +   engineered.
> +
> +WMI method Return_OverclockingReport([out] uint32 argr)
> +-------------------------------------------------------
> +
> +::
> +
> + CSMI (0xE3, 0x99)
> + argr = 0
> +
> +CSMI is an unknown operation.
> +
> +WMI method Set_OCUIBIOSControl([in] uint32 arg2, [out] uint32 argr)
> +-------------------------------------------------------------------
> +
> +::
> +
> + CSMI (0xE3, 0x99)
> + argr = 0
> +
> +CSMI is an unknown operation.
> +
> +WMI method Clear_OCFailSafeFlag([out] uint32 argr)
> +--------------------------------------------------
> +
> +::
> +
> + CSMI (0xE3, 0x99)
> + argr = 0
> +
> +CSMI is an unknown operation.
> +
> +
> +WMI method MemoryOCControl([in] uint32 arg2, [out] uint32 argr)
> +---------------------------------------------------------------
> +
> +AWCC supports memory overclocking, but this method is very intricate and has
> +not been deciphered yet.
> +
> +GPIO methods
> +============
> +
> +These methods are probably related to some kind of firmware update system,
> +through a GPIO device.
> +
> +.. warning::
> +   These methods have not been tested and are only partially reverse
> +   engineered.
> +
> +WMI method FWUpdateGPIOtoggle([in] uint32 arg2, [out] uint32 argr)
> +------------------------------------------------------------------
> +
> +::
> +
> + if BYTE_0(arg2) == 0:
> +         if BYTE_1(arg2) == 1:
> +                 SET_PIN_A_HIGH()
> +         else:
> +                 SET_PIN_A_LOW()
> +
> + if BYTE_0(arg2) == 1:
> +         if BYTE_1(arg2) == 1:
> +                 SET_PIN_B_HIGH()
> +
> +         else:
> +                 SET_PIN_B_LOW()
> +
> + else:
> +         argr = 1
> +
> +WMI method ReadTotalofGPIOs([out] uint32 argr)
> +----------------------------------------------
> +
> +::
> +
> + argr = 0x02
> +
> +WMI method ReadGPIOpPinStatus([in] uint32 arg2, [out] uint32 argr)
> +------------------------------------------------------------------
> +
> +::
> +
> + if BYTE_0(arg2) == 0:
> +         argr = PIN_A_STATUS
> +
> + if BYTE_0(arg2) == 1:
> +         argr = PIN_B_STATUS
> +
> +Other information Methods
> +=========================
> +
> +WMI method ReadChassisColor([out] uint32 argr)
> +----------------------------------------------
> +
> +::
> +
> + argr = CHASSIS_COLOR_ID
> +
> +Acknowledgements
> +================
> +
> +Kudos to `AlexIII <https://github.com/AlexIII/tcc-g15>`_ for documenting
> +and testing available thermal profile codes.
> +
> diff --git a/MAINTAINERS b/MAINTAINERS
> index c27f31907..25f6de4c2 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -792,6 +792,7 @@ F:	drivers/perf/alibaba_uncore_drw_pmu.c
>  ALIENWARE WMI DRIVER
>  L:	Dell.Client.Kernel@dell.com
>  S:	Maintained
> +F:	Documentation/wmi/devices/alienware-wmi.rst
>  F:	drivers/platform/x86/dell/alienware-wmi.c
>  
>  ALLEGRO DVT VIDEO IP CORE DRIVER
>