PowerControl: Add Charge Limit

Author: ayufan

CommonHelpers/Vlv0100.cs

@@ -15,6 +15,7 @@ public class Vlv0100 : IDisposable
         static IntPtr PDFV = new IntPtr(0xFE700C00 + 0x4C);
         static IntPtr XBID = new IntPtr(0xFE700300 + 0xBD);
         static IntPtr PDCT = new IntPtr(0xFE700C00 + 0x01);
+        static IntPtr MCBL = new IntPtr(0xFE700B00 + 0x9F);
         static ushort IO6C = 0x6C;
 
         public const ushort MAX_FAN_RPM = 0x1C84;
@@ -26,6 +27,7 @@ public struct DeviceVersion
             public byte PDCS { get; set; }
 
             public bool BatteryTempLE { get; set; }
+            public bool MaxBatteryCharge { get; set; }
 
             public bool IsSupported(ushort deviceFirmware, byte deviceBoardID, byte devicePDCS)
             {
@@ -42,11 +44,11 @@ public bool IsSupported(ushort deviceFirmware, byte deviceBoardID, byte devicePD
         private static readonly DeviceVersion[] deviceVersions = {
             // Steam Deck - LCD version
             new DeviceVersion() { Firmware = 0xB030, BoardID = 0x6, PDCS = 0 /* 0x2B */, BatteryTempLE = false },
-            new DeviceVersion() { Firmware = 0xB030, BoardID = 0xA, PDCS = 0 /* 0x2B */, BatteryTempLE = false },
+            new DeviceVersion() { Firmware = 0xB030, BoardID = 0xA, PDCS = 0 /* 0x2B */, BatteryTempLE = false, MaxBatteryCharge = true },
 
             // Steam Deck - OLED version
             // new DeviceVersion() { Firmware = 0x1030, BoardID = 0x5, PDCS = 0 /* 0x2F */, BatteryTempLE = true },
-            new DeviceVersion() { Firmware = 0x1050, BoardID = 0x5, PDCS = 0 /* 0x2F */, BatteryTempLE = true }
+            new DeviceVersion() { Firmware = 0x1050, BoardID = 0x5, PDCS = 0 /* 0x2F */, BatteryTempLE = true, MaxBatteryCharge = true }
         };
 
         public static Vlv0100 Instance = new Vlv0100();
@@ -178,6 +180,27 @@ public float GetBattTemperature()
             return (float)(value - 0x0AAC) / 10.0f;
         }
 
+        public int? GetMaxBatteryCharge()
+        {
+            if (SupportedDevice?.MaxBatteryCharge != true)
+                return null;
+            var data = inpOut?.ReadMemory(MCBL, 1);
+            if (data is null)
+                return null;
+            if (data[0] > 100)
+                return null;
+            return data[0];
+        }
+        public void SetMaxBatteryCharge(int chargeLimit)
+        {
+            if (SupportedDevice?.MaxBatteryCharge != true)
+                return;
+            if (chargeLimit < 0 || chargeLimit > 100)
+                return;
+            byte[] data = BitConverter.GetBytes(chargeLimit);
+            inpOut?.WriteMemory(MCBL, data);
+        }
+
         private void SetGain(ushort gain)
         {
             byte[] data = BitConverter.GetBytes(gain);

PowerControl/MenuStack.cs

@@ -36,7 +36,8 @@ internal class MenuStack
                 Options.PerformanceOverlay.ModeInstance,
                 Options.PerformanceOverlay.KernelDriversInstance,
                 Options.FanControl.Instance,
-                Options.SteamController.Instance
+                Options.SteamController.Instance,
+                Options.BatteryChargeLimit.Instance
             }
         };
 

PowerControl/Options/BatteryChargeLimit.cs

@@ -0,0 +1,32 @@
+using CommonHelpers;
+
+namespace PowerControl.Options
+{
+    public static class BatteryChargeLimit
+    {
+        public static Menu.MenuItemWithOptions Instance = new Menu.MenuItemWithOptions()
+        {
+            Name = "Charge Limit",
+            ApplyDelay = 1000,
+            Options = { "70%", "80%", "90%", "100%" },
+            ActiveOption = "?",
+            ApplyValue = (selected) =>
+            {
+                var value = int.Parse(selected.ToString().TrimEnd('%'));
+
+                using (var vlv0100 = new Vlv0100())
+                {
+                    if (!vlv0100.Open())
+                        return null;
+
+                    vlv0100.SetMaxBatteryCharge(value);
+
+                    var newValue = vlv0100.GetMaxBatteryCharge();
+                    if (newValue is null)
+                        return null;
+                    return newValue.ToString() + "%";
+                }
+            }
+        };
+    }
+}

RELEASE.md

@@ -6,6 +6,8 @@
 
 ## #{GIT_TAG_NAME}
 
+- PowerControl: Add Charge Limit (70%, 80%, 90%, 100%)
+
 ## 0.7.1
 
 - SteamDeck OLED: Support BIOS 107 with temperature readings