1 files changed, 83 insertions, 0 deletions
diff --git a/cmd/read.c b/cmd/read.c
new file mode 100644
index 00000000000..8e21f004423
--- /dev/null
+++ b/cmd/read.c
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ */
+
+#include <command.h>
+#include <mapmem.h>
+#include <part.h>
+#include <vsprintf.h>
+
+static int
+do_rw(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+{
+	struct blk_desc *dev_desc = NULL;
+	struct disk_partition part_info;
+	ulong offset, limit;
+	uint blk, cnt, res;
+	void *ptr;
+	int part;
+
+	if (argc != 6) {
+		cmd_usage(cmdtp);
+		return 1;
+	}
+
+	part = part_get_info_by_dev_and_name_or_num(argv[1], argv[2],
+						    &dev_desc, &part_info, 1);
+	if (part < 0)
+		return 1;
+
+	ptr = map_sysmem(hextoul(argv[3], NULL), 0);
+	blk = hextoul(argv[4], NULL);
+	cnt = hextoul(argv[5], NULL);
+
+	if (part > 0) {
+		offset = part_info.start;
+		limit = part_info.size;
+	} else {
+		/* Largest address not available in struct blk_desc. */
+		offset = 0;
+		limit = ~0;
+	}
+
+	if (cnt + blk > limit) {
+		printf("%s out of range\n", cmdtp->name);
+		unmap_sysmem(ptr);
+		return 1;
+	}
+
+	if (IS_ENABLED(CONFIG_CMD_WRITE) && !strcmp(cmdtp->name, "write"))
+		res = blk_dwrite(dev_desc, offset + blk, cnt, ptr);
+	else
+		res = blk_dread(dev_desc, offset + blk, cnt, ptr);
+	unmap_sysmem(ptr);
+
+	if (res != cnt) {
+		printf("%s error\n", cmdtp->name);
+		return 1;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_CMD_READ
+U_BOOT_CMD(
+	read,	6,	0,	do_rw,
+	"Load binary data from a partition",
+	"<interface> <dev[:part|#partname]> addr blk# cnt"
+);
+#endif
+
+#ifdef CONFIG_CMD_WRITE
+U_BOOT_CMD(
+	write,	6,	0,	do_rw,
+	"Store binary data to a partition",
+	"<interface> <dev[:part|#partname]> addr blk# cnt"
+);
+#endif