sd fs: Move sd init/mount/helpers to their own object

bootloader/storage/nx_sd.c

@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2018 naehrwert
+ * Copyright (c) 2018-2019 CTCaer
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "nx_sd.h"
+#include "sdmmc.h"
+#include "sdmmc_driver.h"
+#include "../gfx/gfx.h"
+#include "../libs/fatfs/ff.h"
+#include "../mem/heap.h"
+
+static bool sd_mounted = false;
+
+bool sd_mount()
+{
+	if (sd_mounted)
+		return true;
+
+	if (!sdmmc_storage_init_sd(&sd_storage, &sd_sdmmc, SDMMC_BUS_WIDTH_4, SDHCI_TIMING_UHS_SDR82))
+	{
+		gfx_con.mute = false;
+		EPRINTF("Failed to init SD card.\nMake sure that it is inserted.\nOr that SD reader is properly seated!");
+	}
+	else
+	{
+		int res = 0;
+		res = f_mount(&sd_fs, "", 1);
+		if (res == FR_OK)
+		{
+			sd_mounted = 1;
+			return true;
+		}
+		else
+		{
+			gfx_con.mute = false;
+			EPRINTFARGS("Failed to mount SD card (FatFS Error %d).\nMake sure that a FAT partition exists..", res);
+		}
+	}
+
+	return false;
+}
+
+void sd_unmount()
+{
+	if (sd_mounted)
+	{
+		f_mount(NULL, "", 1);
+		sdmmc_storage_end(&sd_storage);
+		sd_mounted = false;
+	}
+}
+
+void *sd_file_read(const char *path, u32 *fsize)
+{
+	FIL fp;
+	if (f_open(&fp, path, FA_READ) != FR_OK)
+		return NULL;
+
+	u32 size = f_size(&fp);
+	if (fsize)
+		*fsize = size;
+
+	void *buf = malloc(size);
+
+	if (f_read(&fp, buf, size, NULL) != FR_OK)
+	{
+		free(buf);
+		f_close(&fp);
+
+		return NULL;
+	}
+
+	f_close(&fp);
+
+	return buf;
+}
+
+int sd_save_to_file(void *buf, u32 size, const char *filename)
+{
+	FIL fp;
+	u32 res = 0;
+	res = f_open(&fp, filename, FA_CREATE_ALWAYS | FA_WRITE);
+	if (res)
+	{
+		EPRINTFARGS("Error (%d) creating file\n%s.\n", res, filename);
+		return res;
+	}
+
+	f_write(&fp, buf, size, NULL);
+	f_close(&fp);
+
+	return 0;
+}