update fatfs demo and port

third_party/fatfs-0.14/source/diskio.c

@@ -29,25 +29,24 @@ DSTATUS disk_status (
 )
 {
 	DSTATUS stat;
-	int result;
 
 	switch (pdrv) {
 	case DEV_RAM :
-		//result = RAM_disk_status();
+		//stat = RAM_disk_status();
 
 		// translate the reslut code here
 
 		return stat;
 
 	case DEV_MMC :
-		//result = MMC_disk_status();
+		//stat = MMC_disk_status();
 
 		// translate the reslut code here
 
 		return stat;
 
 	case DEV_USB :
-		result = USB_disk_status();
+		stat = USB_disk_status();
 
 		// translate the reslut code here
 
@@ -67,25 +66,24 @@ DSTATUS disk_initialize (
 )
 {
 	DSTATUS stat;
-	int result;
 
 	switch (pdrv) {
 	case DEV_RAM :
-		//result = RAM_disk_initialize();
+		//stat = RAM_disk_initialize();
 
 		// translate the reslut code here
 
 		return stat;
 
 	case DEV_MMC :
-		//result = MMC_disk_initialize();
+		//stat = MMC_disk_initialize();
 
 		// translate the reslut code here
 
 		return stat;
 
 	case DEV_USB :
-		result = USB_disk_initialize();
+		stat = USB_disk_initialize();
 
 		// translate the reslut code here
 
@@ -108,13 +106,12 @@ DRESULT disk_read (
 )
 {
 	DRESULT res;
-	int result;
 
 	switch (pdrv) {
 	case DEV_RAM :
 		// translate the arguments here
 
-		//result = RAM_disk_read(buff, sector, count);
+		//res = RAM_disk_read(buff, sector, count);
 
 		// translate the reslut code here
 
@@ -123,7 +120,7 @@ DRESULT disk_read (
 	case DEV_MMC :
 		// translate the arguments here
 
-		//result = MMC_disk_read(buff, sector, count);
+		//res = MMC_disk_read(buff, sector, count);
 
 		// translate the reslut code here
 
@@ -132,7 +129,7 @@ DRESULT disk_read (
 	case DEV_USB :
 		// translate the arguments here
 
-		result = USB_disk_read(buff, sector, count);
+		res = USB_disk_read(buff, sector, count);
 
 		// translate the reslut code here
 
@@ -158,13 +155,12 @@ DRESULT disk_write (
 )
 {
 	DRESULT res;
-	int result;
 
 	switch (pdrv) {
 	case DEV_RAM :
 		// translate the arguments here
 
-		//result = RAM_disk_write(buff, sector, count);
+		//res = RAM_disk_write(buff, sector, count);
 
 		// translate the reslut code here
 
@@ -173,7 +169,7 @@ DRESULT disk_write (
 	case DEV_MMC :
 		// translate the arguments here
 
-		//result = MMC_disk_write(buff, sector, count);
+		//res = MMC_disk_write(buff, sector, count);
 
 		// translate the reslut code here
 
@@ -182,7 +178,7 @@ DRESULT disk_write (
 	case DEV_USB :
 		// translate the arguments here
 
-		result = USB_disk_write(buff, sector, count);
+		res = USB_disk_write(buff, sector, count);
 
 		// translate the reslut code here
 
@@ -224,7 +220,7 @@ DRESULT disk_ioctl (
 	case DEV_USB :
 
 		// Process of the command the USB drive
-        USB_disk_ioctl(cmd,buff);
+        res = USB_disk_ioctl(cmd,buff);
 		return res;
 	}
 

third_party/fatfs-0.14/source/ffconf.h

@@ -166,12 +166,12 @@
 / Drive/Volume Configurations
 /---------------------------------------------------------------------------*/
 
-#define FF_VOLUMES		1
+#define FF_VOLUMES		3
 /* Number of volumes (logical drives) to be used. (1-10) */
 
 
 #define FF_STR_VOLUME_ID	0
-#define FF_VOLUME_STRS		"RAM","NAND","CF","SD","SD2","USB","USB2","USB3"
+#define FF_VOLUME_STRS		"RAM","SD","USB"
 /* 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

third_party/fatfs-0.14/source/port/fatfs_usbh.c

@@ -14,18 +14,21 @@ int USB_disk_initialize(void)
     active_msc_class = (struct usbh_msc *)usbh_find_class_instance("/dev/sda");
     if (active_msc_class == NULL) {
         printf("do not find /dev/sda\r\n");
-        return -1;
+        return RES_NOTRDY;
     }
     return RES_OK;
 }
+
 int USB_disk_read(BYTE *buff, LBA_t sector, UINT count)
 {
     return usbh_msc_scsi_read10(active_msc_class, sector, buff, count);
 }
+
 int USB_disk_write(const BYTE *buff, LBA_t sector, UINT count)
 {
     return usbh_msc_scsi_write10(active_msc_class, sector, buff, count);
 }
+
 int USB_disk_ioctl(BYTE cmd, void *buff)
 {
     int result = 0;