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@xxxxxxxxx> Reviewed-by: Armin Wolf <W_Armin@xxxxxx> --- 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@xxxxxxxx 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
