Initial commit

2026-01-09 16:27:56 -08:00 · 2025-11-23 14:02:39 +01:00
commit 3bb550c12e
53 changed files with 4301 additions and 0 deletions
--- a/platform/DSPicoUsbInEndpoint.cpp
+++ b/platform/DSPicoUsbInEndpoint.cpp
@@ -0,0 +1,100 @@
+#include "common.h"
+#include "libtwl/dma/dmaNitro.h"
+#include "tusb.h"
+#include "device/dcd.h"
+#include "DSPicoUsb.h"
+#include "DSPicoUsbInEndpoint.h"
+
+void DSPicoUsbInEndpoint::BeginTransfer(const u8* buffer, u32 length)
+{
+    rtos_lockMutex(&_mutex);
+    {
+        _buffer = buffer;
+        _bufferLength = length;
+        _remaining = length;
+        _bufferOffset = 0;
+        _currentDSPicoBuffer = 0;
+        _transferActive = true;
+        SendUsbBlock(true);
+        SendUsbBlock(false);
+    }
+    rtos_unlockMutex(&_mutex);
+}
+
+void DSPicoUsbInEndpoint::ProcessTransferCompleteEvent(u32 transferredBytes)
+{
+    rtos_lockMutex(&_mutex);
+    {
+        if (_transferActive)
+        {
+            _remaining -= transferredBytes;
+            if (_remaining == 0)
+            {
+                dcd_event_xfer_complete(0, _endpointAddress, _bufferLength, XFER_RESULT_SUCCESS, true);
+                _transferActive = false;
+            }
+            else
+            {
+                u32 length = _remaining;
+                if (length > 512)
+                {
+                    length = 512;
+                }
+                rtos_lockMutex(&gCardMutex);
+                {
+                    card_romSetCmd(DSPICO_CMD_USB_COMMAND_BEGIN_TRANSFER(_endpointAddress, 1 - _currentDSPicoBuffer, length));
+                    card_romStartXfer(DSPICO_USB_DEFAULT_COMMAND_SETTINGS, false);
+                    card_romWaitBusy();
+                }
+                rtos_unlockMutex(&gCardMutex);
+
+                SendUsbBlock(false);
+            }
+        }
+        else
+        {
+            // This seems to happen only once on the control endpoint. Idk why.
+            dcd_event_xfer_complete(0, _endpointAddress, transferredBytes, XFER_RESULT_SUCCESS, true);
+        }
+    }
+    rtos_unlockMutex(&_mutex);
+}
+
+void DSPicoUsbInEndpoint::SendUsbBlock(bool startTransfer)
+{
+    u32 length = _bufferLength - _bufferOffset;
+    if (length > 0)
+    {
+        if (length > 512)
+        {
+            length = 512;
+        }
+
+        rtos_lockMutex(&gCardMutex);
+        {
+            REG_DMA3SAD = (u32)(_buffer + _bufferOffset);
+            REG_DMA3DAD = (u32)&REG_MCD1;
+            REG_DMA3CNT = 0xA6400001;
+            card_romSetCmd(DSPICO_CMD_USB_WRITE_DATA(_currentDSPicoBuffer, _endpointAddress, startTransfer, length));
+            card_romStartXfer(MCCNT1_DIR_WRITE | MCCNT1_RESET_OFF | MCCNT1_CLK_6_7_MHZ | MCCNT1_LEN_512 | MCCNT1_CMD_SCRAMBLE |
+                MCCNT1_LATENCY2(8) | MCCNT1_CLOCK_SCRAMBLER | MCCNT1_READ_DATA_DESCRAMBLE | MCCNT1_LATENCY1(0), false);
+            card_romWaitBusy();
+            REG_DMA3CNT = 0;
+        }
+        rtos_unlockMutex(&gCardMutex);
+
+        _bufferOffset += length;
+        _currentDSPicoBuffer = 1 - _currentDSPicoBuffer;
+    }
+    else if (startTransfer)
+    {
+        // zero length transfer
+        rtos_lockMutex(&gCardMutex);
+        {
+            card_romSetCmd(DSPICO_CMD_USB_WRITE_DATA(_currentDSPicoBuffer, _endpointAddress, true, 0));
+            card_romStartXfer(DSPICO_USB_DEFAULT_COMMAND_SETTINGS, false);
+            card_romWaitBusy();
+        }
+        rtos_unlockMutex(&gCardMutex);
+    }
+}