Initial checkin

component/common/file_system/fatfs/fatfs_ext/src/ff_driver.c

@@ -0,0 +1,54 @@
+#include <fatfs_ext/inc/ff_driver.h>
+
+ff_disk_drv  disk = {0};
+
+// return drv_num assigned
+int FATFS_RegisterDiskDriver(ll_diskio_drv *drv){
+	unsigned char drv_num = -1;
+
+	if(disk.nbr < _VOLUMES)
+	{
+	  drv->drv_num = disk.nbr;	// record driver number for a specific disk
+	  disk.drv[disk.nbr] = drv;
+	  disk.nbr++;
+	  drv_num = drv->drv_num;
+	}
+	return drv_num;
+}
+
+int FATFS_UnRegisterDiskDriver(unsigned char drv_num){
+	int index;
+
+	if(disk.nbr >= 1)
+	{
+		for(index=0;index<disk.nbr;index++){
+			if(disk.drv[index]->drv_num == drv_num){
+				disk.drv[index] = 0;
+		  		disk.nbr--;
+				return 0;
+			}
+		}
+		return -1; // fail
+	}
+	return -1; // no disk driver registered
+}
+
+
+/**
+  * @brief  Gets number of linked drivers to the FatFs module.
+  * @param  None
+  * @retval Number of attached drivers.
+  */
+int FATFS_getDrivernum(unsigned char* TAG)
+{
+	ll_diskio_drv *drv;
+	int index;
+
+	for(index=0;index<disk.nbr;index++){
+		drv = disk.drv[index];
+		if(!strcmp(drv->TAG, TAG)){
+			return drv->drv_num;
+		}
+	}
+  	return -1;
+}