fatfs: Add Ramdisk support

bootloader/libs/fatfs/diskio.h

@@ -47,6 +47,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
 /* Generic command (Used by FatFs) */
 #define CTRL_SYNC			0	/* Complete pending write process (needed at FF_FS_READONLY == 0) */
 #define GET_SECTOR_COUNT	1	/* Get media size (needed at FF_USE_MKFS == 1) */
+#define SET_SECTOR_COUNT	1	/* Set media size (needed at FF_USE_MKFS == 1) */
 #define GET_SECTOR_SIZE		2	/* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */
 #define GET_BLOCK_SIZE		3	/* Get erase block size (needed at FF_USE_MKFS == 1) */
 #define CTRL_TRIM			4	/* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */

nyx/nyx_gui/libs/fatfs/diskio.c

@@ -12,6 +12,7 @@
 #include "diskio.h"		/* FatFs lower layer API */
 #include "../../../../common/memory_map.h"
 #include "../../storage/nx_sd.h"
+#include "../../storage/ramdisk.h"
 #include "../../storage/sdmmc.h"
 
 /*-----------------------------------------------------------------------*/
@@ -44,7 +45,15 @@ DRESULT disk_read (
 	UINT count		/* Number of sectors to read */
 )
 {
-	return sdmmc_storage_read(&sd_storage, sector, count, buff) ? RES_OK : RES_ERROR;
+	switch (pdrv)
+	{
+	case DRIVE_SD:
+		return sdmmc_storage_read(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
+	case DRIVE_RAM:
+		return ram_disk_read(sector, count, (void *)buff);
+	}
+
+	return RES_ERROR;
 }
 
 /*-----------------------------------------------------------------------*/
@@ -57,17 +66,74 @@ DRESULT disk_write (
 	UINT count			/* Number of sectors to write */
 )
 {
-	return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
+	switch (pdrv)
+	{
+	case DRIVE_SD:
+		return sdmmc_storage_write(&sd_storage, sector, count, (void *)buff) ? RES_OK : RES_ERROR;
+	case DRIVE_RAM:
+		return ram_disk_write(sector, count, (void *)buff);
+	}
+
+	return RES_ERROR;
 }
 
 /*-----------------------------------------------------------------------*/
 /* Miscellaneous Functions                                               */
 /*-----------------------------------------------------------------------*/
+static u32 part_rsvd_size = 0;
 DRESULT disk_ioctl (
 	BYTE pdrv,		/* Physical drive nmuber (0..) */
 	BYTE cmd,		/* Control code */
 	void *buff		/* Buffer to send/receive control data */
 )
 {
+	DWORD *buf = (DWORD *)buff;
+
+	if (pdrv == DRIVE_SD)
+	{
+		switch (cmd)
+		{
+		case GET_SECTOR_COUNT:
+			*buf = sd_storage.sec_cnt - part_rsvd_size;
+			break;
+		case GET_BLOCK_SIZE:
+			*buf = 32768; // Align to 16MB.
+			break;
+		}
+	}
+	else if (pdrv == DRIVE_RAM)
+	{
+		switch (cmd)
+		{
+		case GET_SECTOR_COUNT:
+			*buf = RAM_DISK_SZ >> 9; // 1GB.
+			break;
+		case GET_BLOCK_SIZE:
+			*buf = 2048; // Align to 1MB.
+			break;
+		}
+	}
+
+	return RES_OK;
+}
+
+DRESULT disk_set_info (
+	BYTE pdrv,		/* Physical drive nmuber (0..) */
+	BYTE cmd,		/* Control code */
+	void *buff		/* Buffer to send/receive control data */
+)
+{
+	DWORD *buf = (DWORD *)buff;
+
+	if (pdrv == DRIVE_SD)
+	{
+		switch (cmd)
+		{
+		case SET_SECTOR_COUNT:
+			part_rsvd_size = *buf;
+			break;
+		}
+	}
+
 	return RES_OK;
 }

nyx/nyx_gui/libs/fatfs/diskio.h

@@ -23,6 +23,11 @@ typedef enum {
 	RES_PARERR		/* 4: Invalid Parameter */
 } DRESULT;
 
+typedef enum {
+	DRIVE_SD   = 0,
+	DRIVE_RAM  = 1,
+} DDRIVE;
+
 
 /*---------------------------------------*/
 /* Prototypes for disk control functions */
@@ -33,6 +38,7 @@ DSTATUS disk_status (BYTE pdrv);
 DRESULT disk_read (BYTE pdrv, BYTE* buff, DWORD sector, UINT count);
 DRESULT disk_write (BYTE pdrv, const BYTE* buff, DWORD sector, UINT count);
 DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
+DRESULT disk_set_info (BYTE pdrv, BYTE cmd, void *buff);
 
 
 /* Disk Status Bits (DSTATUS) */
@@ -47,6 +53,7 @@ DRESULT disk_ioctl (BYTE pdrv, BYTE cmd, void* buff);
 /* Generic command (Used by FatFs) */
 #define CTRL_SYNC			0	/* Complete pending write process (needed at FF_FS_READONLY == 0) */
 #define GET_SECTOR_COUNT	1	/* Get media size (needed at FF_USE_MKFS == 1) */
+#define SET_SECTOR_COUNT	1	/* Set media size (needed at FF_USE_MKFS == 1) */
 #define GET_SECTOR_SIZE		2	/* Get sector size (needed at FF_MAX_SS != FF_MIN_SS) */
 #define GET_BLOCK_SIZE		3	/* Get erase block size (needed at FF_USE_MKFS == 1) */
 #define CTRL_TRIM			4	/* Inform device that the data on the block of sectors is no longer used (needed at FF_USE_TRIM == 1) */

nyx/nyx_gui/libs/fatfs/ffconf.h

@@ -38,7 +38,7 @@
 /  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */
 
 
-#define FF_USE_MKFS		0
+#define FF_USE_MKFS		1
 /* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
 
 #define FF_FASTFS 1
@@ -60,7 +60,7 @@
 /  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
 
 
-#define FF_USE_LABEL	0
+#define FF_USE_LABEL	1
 /* This option switches volume label functions, f_getlabel() and f_setlabel().
 /  (0:Disable or 1:Enable) */
 
@@ -155,7 +155,7 @@
 */
 
 
-#define FF_FS_RPATH		0
+#define FF_FS_RPATH		1
 /* This option configures support for relative path.
 /
 /   0: Disable relative path and remove related functions.
@@ -168,12 +168,13 @@
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/
 
-#define FF_VOLUMES		1
+#define FF_VOLUMES		2
 /* Number of volumes (logical drives) to be used. (1-10) */
 
 
-#define FF_STR_VOLUME_ID	0
-#define FF_VOLUME_STRS		"sd"
+#define FF_STR_VOLUME_ID	1
+// Order is important. Any change to order, must also be reflected to diskio drive enum.
+#define FF_VOLUME_STRS		"sd","ram"
 /* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
 /  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
 /  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
@@ -241,7 +242,7 @@
 /  Note that enabling exFAT discards ANSI C (C89) compatibility. */
 
 
-#define FF_FS_NORTC		1
+#define FF_FS_NORTC		0
 #define FF_NORTC_MON	1
 #define FF_NORTC_MDAY	1
 #define FF_NORTC_YEAR	2019

nyx/nyx_gui/storage/nx_sd.c

@@ -151,7 +151,7 @@ bool sd_mount()
 	else
 	{
 		sd_init_done = true;
-		res = f_mount(&sd_fs, "", 1);
+		res = f_mount(&sd_fs, "sd:", 1);
 		if (res == FR_OK)
 		{
 			sd_mounted = true;
@@ -173,7 +173,7 @@ void sd_unmount(bool deinit)
 
 	if (sd_init_done && sd_mounted)
 	{
-		f_mount(NULL, "", 1);
+		f_mount(NULL, "sd:", 1);
 		sd_mounted = false;
 	}
 	if (sd_init_done && deinit)