cmd_read.c
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/*
* 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 <common.h>
#include <command.h>
#include <part.h>
int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
char *ep;
block_dev_desc_t *dev_desc = NULL;
int dev;
int part = 0;
disk_partition_t part_info;
ulong offset = 0u;
ulong limit = 0u;
void *addr;
uint blk;
uint cnt;
if (argc != 6) {
cmd_usage(cmdtp);
return 1;
}
dev = (int)simple_strtoul(argv[2], &ep, 16);
if (*ep) {
if (*ep != ':') {
printf("Invalid block device %s\n", argv[2]);
return 1;
}
part = (int)simple_strtoul(++ep, NULL, 16);
}
dev_desc = get_dev(argv[1], dev);
if (dev_desc == NULL) {
printf("Block device %s %d not supported\n", argv[1], dev);
return 1;
}
addr = (void *)simple_strtoul(argv[3], NULL, 16);
blk = simple_strtoul(argv[4], NULL, 16);
cnt = simple_strtoul(argv[5], NULL, 16);
if (part != 0) {
if (get_partition_info(dev_desc, part, &part_info)) {
printf("Cannot find partition %d\n", part);
return 1;
}
offset = part_info.start;
limit = part_info.size;
} else {
/* Largest address not available in block_dev_desc_t. */
limit = ~0;
}
if (cnt + blk > limit) {
printf("Read out of range\n");
return 1;
}
if (dev_desc->block_read(dev, offset + blk, cnt, addr) < 0) {
printf("Error reading blocks\n");
return 1;
}
return 0;
}
U_BOOT_CMD(
read, 6, 0, do_read,
"Load binary data from a partition",
"<interface> <dev[:part]> addr blk# cnt"
);