3 files changed, 83 insertions, 2 deletions

diff --git a/drivers/dfu/Makefile b/drivers/dfu/Makefile
index fca370a..de9e44e 100644
--- a/drivers/dfu/Makefile
+++ b/drivers/dfu/Makefile
@@ -12,6 +12,7 @@ LIB	= $(obj)libdfu.o
 COBJS-$(CONFIG_DFU_FUNCTION) += dfu.o
 COBJS-$(CONFIG_DFU_MMC) += dfu_mmc.o
 COBJS-$(CONFIG_DFU_NAND) += dfu_nand.o
+COBJS-$(CONFIG_DFU_RAM) += dfu_ram.o
 
 SRCS    := $(COBJS-y:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS-y))
diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c
index 689f5db..56b21c7 100644
--- a/drivers/dfu/dfu.c
+++ b/drivers/dfu/dfu.c
@@ -348,6 +348,9 @@ static int dfu_fill_entity(struct dfu_entity *dfu, char *s, int alt,
 	} else if (strcmp(interface, "nand") == 0) {
 		if (dfu_fill_entity_nand(dfu, s))
 			return -1;
+	} else if (strcmp(interface, "ram") == 0) {
+		if (dfu_fill_entity_ram(dfu, s))
+			return -1;
 	} else {
 		printf("%s: Device %s not (yet) supported!\n",
 		       __func__,  interface);
@@ -397,14 +400,14 @@ int dfu_config_entities(char *env, char *interface, int num)
 
 const char *dfu_get_dev_type(enum dfu_device_type t)
 {
-	const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND" };
+	const char *dev_t[] = {NULL, "eMMC", "OneNAND", "NAND", "RAM" };
 	return dev_t[t];
 }
 
 const char *dfu_get_layout(enum dfu_layout l)
 {
 	const char *dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2",
-					   "EXT3", "EXT4" };
+					   "EXT3", "EXT4", "RAM_ADDR" };
 	return dfu_layout[l];
 }
 
diff --git a/drivers/dfu/dfu_ram.c b/drivers/dfu/dfu_ram.c
new file mode 100644
index 0000000..335a8e1
--- /dev/null
+++ b/drivers/dfu/dfu_ram.c
@@ -0,0 +1,77 @@
+/*
+ * (C) Copyright 2013
+ * Afzal Mohammed <afzal.mohd.ma@gmail.com>
+ *
+ * Reference: dfu_mmc.c
+ * Copyright (C) 2012 Samsung Electronics
+ * author: Lukasz Majewski <l.majewski@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <errno.h>
+#include <dfu.h>
+
+static int dfu_transfer_medium_ram(enum dfu_op op, struct dfu_entity *dfu,
+				   u64 offset, void *buf, long *len)
+{
+	if (dfu->layout != DFU_RAM_ADDR) {
+		error("unsupported layout: %s\n", dfu_get_layout(dfu->layout));
+		return  -EINVAL;
+	}
+
+	if (offset > dfu->data.ram.size) {
+		error("request exceeds allowed area\n");
+		return -EINVAL;
+	}
+
+	if (op == DFU_OP_WRITE)
+		memcpy(dfu->data.ram.start + offset, buf, *len);
+	else
+		memcpy(buf, dfu->data.ram.start + offset, *len);
+
+	return 0;
+}
+
+static int dfu_write_medium_ram(struct dfu_entity *dfu, u64 offset,
+				void *buf, long *len)
+{
+	return dfu_transfer_medium_ram(DFU_OP_WRITE, dfu, offset, buf, len);
+}
+
+static int dfu_read_medium_ram(struct dfu_entity *dfu, u64 offset,
+			       void *buf, long *len)
+{
+	if (!*len) {
+		*len = dfu->data.ram.size;
+		return 0;
+	}
+
+	return dfu_transfer_medium_ram(DFU_OP_READ, dfu, offset, buf, len);
+}
+
+int dfu_fill_entity_ram(struct dfu_entity *dfu, char *s)
+{
+	char *st;
+
+	dfu->dev_type = DFU_DEV_RAM;
+	st = strsep(&s, " ");
+	if (strcmp(st, "ram")) {
+		error("unsupported device: %s\n", st);
+		return -ENODEV;
+	}
+
+	dfu->layout = DFU_RAM_ADDR;
+	dfu->data.ram.start = (void *)simple_strtoul(s, &s, 16);
+	s++;
+	dfu->data.ram.size = simple_strtoul(s, &s, 16);
+
+	dfu->write_medium = dfu_write_medium_ram;
+	dfu->read_medium = dfu_read_medium_ram;
+
+	dfu->inited = 0;
+
+	return 0;
+}