Commit ff048ea9 authored by Kenneth Waters's avatar Kenneth Waters Committed by Tom Rini

Add a command to read raw blocks from a partition

Sometimes data is on a block device and within a partition, but not in a
particular filesystem.

This commands permits reading raw data from a partition.
Signed-off-by: 's avatarKenneth Waters <kwaters@chromium.org>
Signed-off-by: 's avatarSimon Glass <sjg@chromium.org>
parent 53fdc7ef
......@@ -861,6 +861,7 @@ The following options need to be configured:
CONFIG_CMD_PING * send ICMP ECHO_REQUEST to network
host
CONFIG_CMD_PORTIO * Port I/O
CONFIG_CMD_READ * Read raw data from partition
CONFIG_CMD_REGINFO * Register dump
CONFIG_CMD_RUN run command in env variable
CONFIG_CMD_SAVES * save S record dump
......
......@@ -142,6 +142,7 @@ endif
COBJS-y += cmd_pcmcia.o
COBJS-$(CONFIG_CMD_PORTIO) += cmd_portio.o
COBJS-$(CONFIG_CMD_PXE) += cmd_pxe.o
COBJS-$(CONFIG_CMD_READ) += cmd_read.o
COBJS-$(CONFIG_CMD_REGINFO) += cmd_reginfo.o
COBJS-$(CONFIG_CMD_REISER) += cmd_reiser.o
COBJS-$(CONFIG_CMD_SATA) += cmd_sata.o
......
/*
* 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"
);
......@@ -71,6 +71,7 @@
#define CONFIG_CMD_REGINFO /* Register dump */
#define CONFIG_CMD_REISER /* Reiserfs support */
#define CONFIG_CMD_RARP /* rarpboot support */
#define CONFIG_CMD_READ /* Read data from partition */
#define CONFIG_CMD_RUN /* run command in env variable */
#define CONFIG_CMD_SAVEENV /* saveenv */
#define CONFIG_CMD_SAVES /* save S record dump */
......
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