Nyx: emuMMC Manage window, Tools UI, and misc updates

- Add gui_emu_tools: emuMMC Manage window with correct positioning (LV_PROTECT_PARENT + re-parent to win)
- Tools: single SD button (tap = SD partition manager, 3s hold = eMMC)
- Remove emuSD from Nyx UI (tabs, UMS, partition manager); keep bootloader emusd
- Shorten Create emuMMC description text by one character
- Storage/build/config and dependency updates

Co-authored-by: Cursor <cursoragent@cursor.com>

bdk/storage/emmc.c

@@ -21,10 +21,14 @@
 #include <mem/heap.h>
 #include <soc/fuse.h>
 #include <storage/mbr_gpt.h>
+#include <gfx_utils.h>
 #include <utils/list.h>
+#include <storage/emummc_file_based.h>
 
 static u16 emmc_errors[3] = { 0 }; // Init and Read/Write errors.
 static u32 emmc_mode = EMMC_MMC_HS400;
+static bool emmc_init_done = false;
+static bool emmc_mounted = false;
 
 sdmmc_t emmc_sdmmc;
 sdmmc_storage_t emmc_storage;
@@ -61,7 +65,26 @@ u32 emmc_get_mode()
 	return emmc_mode;
 }
 
-void emmc_end() { sdmmc_storage_end(&emmc_storage); }
+static void _emmc_deinit(bool deinit){
+	if(emmc_init_done){
+		// TODO: Allow unmount even when not init'd?
+		if(emmc_mounted){
+			f_mount(NULL, "emmc:", 0);
+		}
+
+		if(deinit){
+			sdmmc_storage_end(&emmc_storage);
+			emmc_init_done = false;
+		}
+	}
+	emmc_mounted = false;
+}
+
+void emmc_end() { _emmc_deinit(true); }
+
+bool emmc_get_initialized(){
+	return emmc_init_done;
+}
 
 int emmc_init_retry(bool power_cycle)
 {
@@ -97,7 +120,13 @@ int emmc_init_retry(bool power_cycle)
 		emmc_mode = EMMC_MMC_HS400;
 	}
 
-	return sdmmc_storage_init_mmc(&emmc_storage, &emmc_sdmmc, bus_width, type);
+	int res = sdmmc_storage_init_mmc(&emmc_storage, &emmc_sdmmc, bus_width, type);
+	if(res){
+		emmc_init_done = true;
+	}else{
+		emmc_init_done = false;
+	}
+	return res;
 }
 
 bool emmc_initialize(bool power_cycle)
@@ -212,6 +241,14 @@ int emmc_part_write(emmc_part_t *part, u32 sector_off, u32 num_sectors, void *bu
 #endif
 }
 
+sdmmc_storage_t *emmc_part_get_storage(){
+#ifdef BDK_EMUMMC_ENABLE
+	return emummc_get_storage();
+#else
+	return &emmc_storage;
+#endif
+}
+
 void nx_emmc_get_autorcm_masks(u8 *mod0, u8 *mod1)
 {
 	if (fuse_read_hw_state() == FUSE_NX_HW_STATE_PROD)
@@ -225,3 +262,44 @@ void nx_emmc_get_autorcm_masks(u8 *mod0, u8 *mod1)
 		*mod1 = 0x84;
 	}
 }
+
+
+bool emmc_mount()
+{
+	if (emmc_init_done && emmc_mounted)
+		return true;
+
+	int res = 0;
+
+	if (!emmc_init_done)
+		res = !emmc_initialize(false);
+
+	if (res)
+	{
+		gfx_con.mute = false;
+		EPRINTF("Failed to init eMMC.");
+	}
+	else
+	{
+		if (!emmc_mounted)
+			res = f_mount(&emmc_fs, "emmc:", 1); // Volume 0 is SD.
+		if (res == FR_OK)
+		{
+			emmc_mounted = true;
+			return true;
+		}
+		else
+		{
+			gfx_con.mute = false;
+			EPRINTFARGS("Failed to mount eMMC (FatFS Error %d).\nMake sure that a FAT partition exists..", res);
+		}
+	}
+
+	return false;
+}
+
+bool emmc_get_mounted(){
+	return emmc_mounted;
+}
+
+void emmc_unmount() { _emmc_deinit(false); }