/*
   * 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_raw_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])

  {
  	char *ep;

  	struct blk_desc *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
  ", argv[2]);
  			return 1;
  		}
  		part = (int)simple_strtoul(++ep, NULL, 16);
  	}

  	dev_desc = blk_get_dev(argv[1], dev);

  	if (dev_desc == NULL) {
  		printf("Block device %s %d not supported
  ", 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 (part_get_info(dev_desc, part, &part_info)) {

  			printf("Cannot find partition %d
  ", part);
  			return 1;
  		}
  		offset = part_info.start;
  		limit = part_info.size;
  	} else {

  		/* Largest address not available in struct blk_desc. */

  		limit = ~0;
  	}
  
  	if (cnt + blk > limit) {
  		printf("Read out of range
  ");
  		return 1;
  	}

  	if (blk_dread(dev_desc, offset + blk, cnt, addr) != cnt) {

  		printf("Error reading blocks
  ");
  		return 1;
  	}
  
  	return 0;
  }
  
  U_BOOT_CMD(

  	read,	6,	0,	do_raw_read,

  	"Load binary data from a partition",
  	"<interface> <dev[:part]> addr blk# cnt"
  );