A include/mgba/internal/ds/spi.h

@@ -0,0 +1,38 @@
+/* Copyright (c) 2013-2017 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef DS_SPI_IO_H
+#define DS_SPI_IO_H
+
+#include <mgba-util/common.h>
+
+CXX_GUARD_START
+
+#include <mgba/core/log.h>
+
+mLOG_DECLARE_CATEGORY(DS_SPI);
+
+DECL_BITFIELD(DSSPICNT, uint16_t);
+DECL_BITS(DSSPICNT, Baud, 0, 2);
+DECL_BIT(DSSPICNT, Busy, 7);
+DECL_BITS(DSSPICNT, ChipSelect, 8, 2);
+DECL_BIT(DSSPICNT, TransferSize, 10);
+DECL_BIT(DSSPICNT, CSHold, 11);
+DECL_BIT(DSSPICNT, DoIRQ, 14);
+DECL_BIT(DSSPICNT, Enable, 15);
+
+enum {
+	DS_SPI_DEV_POWERMAN = 0,
+	DS_SPI_DEV_FIRMWARE = 1,
+	DS_SPI_DEV_TSC = 2
+};
+
+struct DS;
+DSSPICNT DSSPIWriteControl(struct DS* ds, uint16_t control);
+void DSSPIWrite(struct DS* ds, uint8_t datum);
+
+CXX_GUARD_END
+
+#endif

A src/ds/spi.c

@@ -0,0 +1,21 @@
+/* Copyright (c) 2013-2017 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include <mgba/internal/ds/spi.h>
+
+#include <mgba/internal/ds/ds.h>
+
+mLOG_DEFINE_CATEGORY(DS_SPI, "DS SPI");
+
+DSSPICNT DSSPIWriteControl(struct DS* ds, uint16_t control) {
+	// TODO
+	mLOG(DS_SPI, STUB, "Unimplemented control write: %04X", control);
+	return control;
+}
+
+void DSSPIWrite(struct DS* ds, uint8_t datum) {
+	mLOG(DS_SPI, STUB, "Unimplemented data write: %02X", datum);
+	// TODO
+}