From 10ca9911506fe6fe73328c8d5d638f59a090ee00 Mon Sep 17 00:00:00 2001
From: Robz8 <bobesh8@gmail.com>
Date: Wed, 3 Oct 2018 18:47:47 -0600
Subject: [PATCH] Try to load DLDI driver from arm9 binary

---
 Makefile                        |   2 +-
 arm9/source/driveMenu.cpp       |  17 ++++-
 arm9/source/driveOperations.cpp | 119 ++++++++++++++++++++++++++++++++
 arm9/source/driveOperations.h   |   9 +++
 arm9/source/main.cpp            |   2 +-
 dldi/ak2_sd.bin                 | Bin 0 -> 2292 bytes
 dldi/r4idsn_sd.bin              | Bin 0 -> 2884 bytes
 7 files changed, 145 insertions(+), 4 deletions(-)
 create mode 100644 arm9/source/driveOperations.cpp
 create mode 100644 arm9/source/driveOperations.h
 create mode 100644 dldi/ak2_sd.bin
 create mode 100644 dldi/r4idsn_sd.bin

diff --git a/Makefile b/Makefile
index 4433dbe..147e609 100644
--- a/Makefile
+++ b/Makefile
@@ -27,7 +27,7 @@ TARGET		:=	GodMode9i
 BUILD		:=	build
 SOURCES		:=	source
 INCLUDES	:=	include source
-DATA		:=	data
+DATA		:=	data dldi
 GRAPHICS	:=  gfx
 
 #---------------------------------------------------------------------------------
diff --git a/arm9/source/driveMenu.cpp b/arm9/source/driveMenu.cpp
index 9f7adfa..d4aa415 100644
--- a/arm9/source/driveMenu.cpp
+++ b/arm9/source/driveMenu.cpp
@@ -24,6 +24,7 @@
 
 #include "main.h"
 #include "date.h"
+#include "driveOperations.h"
 
 #define SCREEN_COLS 32
 #define ENTRIES_PER_SCREEN 22
@@ -86,8 +87,20 @@ void driveMenu (void) {
 		if (dmCursorPosition > 1)	dmCursorPosition = 0;		// Wrap around to top of list
 
 		if (pressed & KEY_A) {
-			screenMode = 1;
-			break;
+			if (dmCursorPosition == 0 && isDSiMode()) {
+				chdir("sd:/");
+				screenMode = 1;
+				break;
+			} else {
+				if (isDSiMode()) {
+					flashcardMount();
+				}
+				if (flashcardFound()) {
+					chdir("fat:/");
+					screenMode = 1;
+					break;
+				}
+			}
 		}
 	}
 }
diff --git a/arm9/source/driveOperations.cpp b/arm9/source/driveOperations.cpp
new file mode 100644
index 0000000..8e5de25
--- /dev/null
+++ b/arm9/source/driveOperations.cpp
@@ -0,0 +1,119 @@
+#include <nds.h>
+#include <nds/arm9/dldi.h>
+#include <fat.h>
+#include <sys/stat.h>
+#include <stdio.h>
+
+#include "r4idsn_sd_bin.h"
+#include "ak2_sd_bin.h"
+
+static sNDSHeader nds;
+
+bool sdFound(void) {
+	if (access("sd:/", F_OK) == 0) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool flashcardFound(void) {
+	if (access("fat:/", F_OK) == 0) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+bool bothSDandFlashcard(void) {
+	if ((access("sd:/", F_OK) == 0) && (access("fat:/", F_OK) == 0)) {
+		return true;
+	} else {
+		return false;
+	}
+}
+
+DLDI_INTERFACE* dldiLoadFromBin (void* dldiAddr, u16 size) {
+	DLDI_INTERFACE* device;
+
+	if ((device = (DLDI_INTERFACE*)malloc (sizeof(DLDI_INTERFACE))) == NULL) {
+		return NULL;
+	}
+
+	// Load entire DLDI
+	memcpy(device, dldiAddr, size);
+
+	// Check that it is a valid DLDI
+	if (!dldiIsValid (device)) {
+		free (device);
+		return NULL;
+	}
+
+	dldiFixDriverAddresses (device);
+
+	if (device->ioInterface.features & FEATURE_SLOT_GBA) {
+		sysSetCartOwner(BUS_OWNER_ARM9);
+	}
+	if (device->ioInterface.features & FEATURE_SLOT_NDS) {
+		sysSetCardOwner(BUS_OWNER_ARM9);
+	}
+	
+	return device;
+}
+
+bool UpdateCardInfo(sNDSHeader* nds, char* gameid, char* gamename) {
+	cardReadHeader((uint8*)nds);
+	memcpy(gameid, nds->gameCode, 4);
+	gameid[4] = 0x00;
+	memcpy(gamename, nds->gameTitle, 12);
+	gamename[12] = 0x00;
+	return true;
+}
+
+void ShowGameInfo(const char gameid[], const char gamename[]) {
+	iprintf("Game id: %s\nName:    %s", gameid, gamename);
+}
+
+void flashcardMount(void) {
+	if (!flashcardFound() && REG_SCFG_MC != 0x11) {
+		// Reset Slot-1 to allow reading title name and ID
+		sysSetCardOwner (BUS_OWNER_ARM9);
+		disableSlot1();
+		for(int i = 0; i < 25; i++) { swiWaitForVBlank(); }
+		enableSlot1();
+		for(int i = 0; i < 15; i++) { swiWaitForVBlank(); }
+
+		nds.gameCode[0] = 0;
+		nds.gameTitle[0] = 0;
+		char gamename[13];
+		char gameid[5];
+
+		/*fifoSendValue32(FIFO_USER_04, 1);
+		for (int i = 0; i < 10; i++) {
+			swiWaitForVBlank();
+		}
+		memcpy(&nds, (void*)0x02000000, sizeof(nds));*/
+		UpdateCardInfo(&nds, &gameid[0], &gamename[0]);
+
+		/*SetBrightness(0, 0);
+		SetBrightness(1, 0);
+		consoleDemoInit();
+		iprintf("REG_SCFG_MC: %x\n", REG_SCFG_MC);
+		ShowGameInfo(gameid, gamename);
+
+		for (int i = 0; i < 60*5; i++) {
+			swiWaitForVBlank();
+		}*/
+
+		sysSetCardOwner (BUS_OWNER_ARM7);	// 3DS fix
+
+		// Read a DLDI driver specific to the cart
+		if (!memcmp(gamename, "R4DSULTRA", 9)) {
+			io_dldi_data = dldiLoadFromBin((void*)r4idsn_sd_bin, r4idsn_sd_bin_size);
+			fatMountSimple("fat", &io_dldi_data->ioInterface);
+		} else if (!memcmp(gameid, "YCEP", 4) || !memcmp(gameid, "AHZH", 4)) {
+			io_dldi_data = dldiLoadFromBin((void*)ak2_sd_bin, ak2_sd_bin_size);
+			fatMountSimple("fat", &io_dldi_data->ioInterface);
+		}
+	}
+}
\ No newline at end of file
diff --git a/arm9/source/driveOperations.h b/arm9/source/driveOperations.h
new file mode 100644
index 0000000..9884d10
--- /dev/null
+++ b/arm9/source/driveOperations.h
@@ -0,0 +1,9 @@
+#ifndef FLASHCARD_H
+#define FLASHCARD_H
+
+bool sdFound(void);
+bool flashcardFound(void);
+bool bothSDandFlashcard(void);
+void flashcardMount(void);
+
+#endif //FLASHCARD_H
diff --git a/arm9/source/main.cpp b/arm9/source/main.cpp
index a65be89..bc2c9a7 100644
--- a/arm9/source/main.cpp
+++ b/arm9/source/main.cpp
@@ -34,7 +34,7 @@
 
 //#include "iconTitle.h"
 
-char titleName[32];
+char titleName[32] = {" "};
 
 int screenMode = 0;
 
diff --git a/dldi/ak2_sd.bin b/dldi/ak2_sd.bin
new file mode 100644
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diff --git a/dldi/r4idsn_sd.bin b/dldi/r4idsn_sd.bin
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