Add basic flashcart support for V-Series ED64

limited to loading ROM's.

Makefile

@@ -29,6 +29,7 @@ SRCS = \
 	flashcart/64drive/64drive_ll.c \
 	flashcart/64drive/64drive.c \
 	flashcart/flashcart_utils.c \
+	flashcart/ed64/ed64_vseries.c \
 	flashcart/flashcart.c \
 	flashcart/sc64/sc64_ll.c \
 	flashcart/sc64/sc64.c \

README.md

@@ -114,10 +114,20 @@ If required, you can manually adjust the file on the SD card using your computer
 * Download the latest `menu.bin` file from the [releases](https://github.com/Polprzewodnikowy/N64FlashcartMenu/releases/) page, then put it in the root directory of your SD card.
 
 
-### ED64 & ED64P
+### ED64 - WIP - UNTESTED AND UNSUPPORTED - USE AT OWN RISK
 Currently not supported, but work is in progress (See [PR's](https://github.com/Polprzewodnikowy/N64FlashcartMenu/pulls)).
+NOTE: The menu may be able to load ROM's but not perform saves and may break existing ones..
 
-The aim is to replace [Altra64](https://github.com/networkfusion/altra64) and [ED64-UnofficialOS](https://github.com/n64-tools/ED64-UnofficialOS-binaries).
+#### ED64 (Vseries)
+The aim is to reach feature parity with [ED64-UnofficialOS](https://github.com/n64-tools/ED64-UnofficialOS-binaries) / [ED64-OfficialOS](https://krikzz.com/pub/support/everdrive-64/v2x-v3x/os-bin/).
+Download the `OS64.v64` ROM from the latest [action run - assets] and place it in the `/ED64` folder.
+
+#### ED64 (X series)
+X Series support is currently awaiting fixes, in the meantime use the official [OS](https://krikzz.com/pub/support/everdrive-64/x-series/OS/) instead.
+
+#### ED64 (P clone)
+Download the `OS64P.v64` ROM from the latest [action run - assets] and place it in the `/ED64P` folder.
+The aim is to reach feature parity with [Altra64](https://github.com/networkfusion/altra64)
 
 
 # Open source software and licenses used

src/flashcart/ed64/ed64_vseries.c

@@ -0,0 +1,155 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include <fatfs/ff.h>
+#include <libdragon.h>
+
+#include "utils/fs.h"
+#include "utils/utils.h"
+
+#include "../flashcart_utils.h"
+#include "ed64_vseries.h"
+
+typedef enum {
+    ED64_V1_0 = 110,
+    ED64_V2_0 = 320,
+    ED64_V2_5 = 325,
+    ED64_V3_0 = 330,
+} ed64_vseries_device_variant_t;
+
+/* ED64 save location base address  */
+#define SRAM_ADDRESS (0xA8000000)
+/* ED64 ROM location base address  */
+#define ROM_ADDRESS  (0xB0000000)
+
+static flashcart_err_t ed64_vseries_init (void) {
+    return FLASHCART_OK;
+}
+
+static flashcart_err_t ed64_vseries_deinit (void) {
+    return FLASHCART_OK;
+}
+
+static ed64_vseries_device_variant_t get_cart_model() {
+    ed64_vseries_device_variant_t variant = ED64_V1_0; // FIXME: check cart model from ll for better feature handling.
+    return variant;
+}
+
+static bool ed64_vseries_has_feature (flashcart_features_t feature) {
+    bool is_model_v3 = (get_cart_model() == ED64_V3_0); 
+    switch (feature) {
+        case FLASHCART_FEATURE_RTC: return is_model_v3 ? true : false;
+        case FLASHCART_FEATURE_USB: return is_model_v3 ? true : false;
+        case FLASHCART_FEATURE_AUTO_CIC: return is_model_v3 ? true : false;
+        default: return false;
+    }
+}
+
+static flashcart_err_t ed64_vseries_load_rom (char *rom_path, flashcart_progress_callback_t *progress) {
+    FIL fil;
+    UINT br;
+
+    if (f_open(&fil, strip_fs_prefix(rom_path), FA_READ) != FR_OK) {
+        return FLASHCART_ERR_LOAD;
+    }
+
+    fatfs_fix_file_size(&fil);
+
+    size_t rom_size = f_size(&fil);
+
+    if (rom_size > MiB(64)) {
+        f_close(&fil);
+        return FLASHCART_ERR_LOAD;
+    }
+
+    size_t sdram_size = MiB(64);
+
+    size_t chunk_size = KiB(128);
+    for (int offset = 0; offset < sdram_size; offset += chunk_size) {
+        size_t block_size = MIN(sdram_size - offset, chunk_size);
+        if (f_read(&fil, (void *) (ROM_ADDRESS + offset), block_size, &br) != FR_OK) {
+            f_close(&fil);
+            return FLASHCART_ERR_LOAD;
+        }
+        if (progress) {
+            progress(f_tell(&fil) / (float) (f_size(&fil)));
+        }
+    }
+    if (f_tell(&fil) != rom_size) {
+        f_close(&fil);
+        return FLASHCART_ERR_LOAD;
+    }
+
+    if (f_close(&fil) != FR_OK) {
+        return FLASHCART_ERR_LOAD;
+    }
+
+    return FLASHCART_OK;
+}
+
+static flashcart_err_t ed64_vseries_load_file (char *file_path, uint32_t rom_offset, uint32_t file_offset) {
+    FIL fil;
+    UINT br;
+
+    if (f_open(&fil, strip_fs_prefix(file_path), FA_READ) != FR_OK) {
+        return FLASHCART_ERR_LOAD;
+    }
+
+    fatfs_fix_file_size(&fil);
+
+    size_t file_size = f_size(&fil) - file_offset;
+
+    if (file_size > (MiB(64) - rom_offset)) {
+        f_close(&fil);
+        return FLASHCART_ERR_ARGS;
+    }
+
+    if (f_lseek(&fil, file_offset) != FR_OK) {
+        f_close(&fil);
+        return FLASHCART_ERR_LOAD;
+    }
+
+    if (f_read(&fil, (void *) (ROM_ADDRESS + rom_offset), file_size, &br) != FR_OK) {
+        f_close(&fil);
+        return FLASHCART_ERR_LOAD;
+    }
+    if (br != file_size) {
+        f_close(&fil);
+        return FLASHCART_ERR_LOAD;
+    }
+
+    if (f_close(&fil) != FR_OK) {
+        return FLASHCART_ERR_LOAD;
+    }
+
+    return FLASHCART_OK;
+}
+
+static flashcart_err_t ed64_vseries_load_save (char *save_path) {
+    // FIXME: the savetype will be none.
+    return FLASHCART_OK;
+}
+
+static flashcart_err_t ed64_vseries_set_save_type (flashcart_save_type_t save_type) {
+    // FIXME: the savetype will be none.
+    return FLASHCART_OK;
+}
+
+static flashcart_t flashcart_ed64_vseries = {
+    .init = ed64_vseries_init,
+    .deinit = ed64_vseries_deinit,
+    .has_feature = ed64_vseries_has_feature,
+    .load_rom = ed64_vseries_load_rom,
+    .load_file = ed64_vseries_load_file,
+    .load_save = ed64_vseries_load_save,
+    .load_64dd_ipl = NULL,
+    .load_64dd_disk = NULL,
+    .set_save_type = ed64_vseries_set_save_type,
+    .set_save_writeback = NULL,
+};
+
+
+flashcart_t *ed64_vseries_get_flashcart (void) {
+    return &flashcart_ed64_vseries;
+}

src/flashcart/ed64/ed64_vseries.h

@@ -0,0 +1,24 @@
+/**
+ * @file ed64_vseries.h
+ * @brief ED64 Vseries flashcart support
+ * @ingroup flashcart 
+ */
+
+#ifndef FLASHCART_ED64_VSERIES_H__
+#define FLASHCART_ED64_VSERIES_H__
+
+
+#include "../flashcart.h"
+
+
+/**
+ * @addtogroup ED64_Vseries
+ * @{
+ */
+
+flashcart_t *ed64_vseries_get_flashcart (void);
+
+/** @} */ /* ED64_Vseries */
+
+
+#endif

src/flashcart/ed64/ed64_xseries.h

@@ -0,0 +1,24 @@
+/**
+ * @file ed64xseries.h
+ * @brief ED64 Xseries flashcart support
+ * @ingroup flashcart 
+ */
+
+#ifndef FLASHCART_ED64XSERIES_H__
+#define FLASHCART_ED64XSERIES_H__
+
+
+#include "../flashcart.h"
+
+
+/**
+ * @addtogroup ED64_Xseries
+ * @{
+ */
+
+flashcart_t *ed64xseries_get_flashcart (void);
+
+/** @} */ /* ED64_Xseries */
+
+
+#endif

src/flashcart/flashcart.c

@@ -10,6 +10,7 @@
 #include "flashcart.h"
 #include "flashcart_utils.h"
 
+#include "ed64/ed64_vseries.h"
 #include "64drive/64drive.h"
 #include "sc64/sc64.h"
 
@@ -108,10 +109,13 @@ flashcart_err_t flashcart_init (const char **storage_prefix) {
             flashcart = d64_get_flashcart();
             break;
 
-        case CART_EDX:  // Series X EverDrive-64
+        // FIXME: this is commented out awaiting a fix from libcart.
-            break;
+        // case CART_EDX:  // Series X EverDrive-64
+        //     flashcart = ed64_xseries_get_flashcart();
+        //     break;
 
-        case CART_ED:   // Original EverDrive-64
+        case CART_ED:   // Series V EverDrive-64 or clone
+            flashcart = ed64_vseries_get_flashcart();
             break;
 
         case CART_SC:   // SummerCart64