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common/cmd_read.c
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ff048ea91 Add a command to ... |
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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 ", 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 ", 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 ", 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 "); return 1; } if (dev_desc->block_read(dev, offset + blk, cnt, addr) < 0) { printf("Error reading blocks "); return 1; } return 0; } U_BOOT_CMD( read, 6, 0, do_read, "Load binary data from a partition", "<interface> <dev[:part]> addr blk# cnt" ); |