projects / J-u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| ff048ea9 KW |
1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. All rights reserved. | |
| 3 | * Use of this source code is governed by a BSD-style license that can be | |
| 4 | * found in the LICENSE file. | |
| 5 | * | |
| 6 | * Alternatively, this software may be distributed under the terms of the | |
| 7 | * GNU General Public License ("GPL") version 2 as published by the Free | |
| 8 | * Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #include <common.h> | |
| 12 | #include <command.h> | |
| 13 | #include <part.h> | |
| 14 | ||
| 15 | int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
| 16 | { | |
| 17 | char *ep; | |
| 18 | block_dev_desc_t *dev_desc = NULL; | |
| 19 | int dev; | |
| 20 | int part = 0; | |
| 21 | disk_partition_t part_info; | |
| 22 | ulong offset = 0u; | |
| 23 | ulong limit = 0u; | |
| 24 | void *addr; | |
| 25 | uint blk; | |
| 26 | uint cnt; | |
| 27 | ||
| 28 | if (argc != 6) { | |
| 29 | cmd_usage(cmdtp); | |
| 30 | return 1; | |
| 31 | } | |
| 32 | ||
| 33 | dev = (int)simple_strtoul(argv[2], &ep, 16); | |
| 34 | if (*ep) { | |
| 35 | if (*ep != ':') { | |
| 36 | printf("Invalid block device %s\n", argv[2]); | |
| 37 | return 1; | |
| 38 | } | |
| 39 | part = (int)simple_strtoul(++ep, NULL, 16); | |
| 40 | } | |
| 41 | ||
| 42 | dev_desc = get_dev(argv[1], dev); | |
| 43 | if (dev_desc == NULL) { | |
| 44 | printf("Block device %s %d not supported\n", argv[1], dev); | |
| 45 | return 1; | |
| 46 | } | |
| 47 | ||
| 48 | addr = (void *)simple_strtoul(argv[3], NULL, 16); | |
| 49 | blk = simple_strtoul(argv[4], NULL, 16); | |
| 50 | cnt = simple_strtoul(argv[5], NULL, 16); | |
| 51 | ||
| 52 | if (part != 0) { | |
| 53 | if (get_partition_info(dev_desc, part, &part_info)) { | |
| 54 | printf("Cannot find partition %d\n", part); | |
| 55 | return 1; | |
| 56 | } | |
| 57 | offset = part_info.start; | |
| 58 | limit = part_info.size; | |
| 59 | } else { | |
| 60 | /* Largest address not available in block_dev_desc_t. */ | |
| 61 | limit = ~0; | |
| 62 | } | |
| 63 | ||
| 64 | if (cnt + blk > limit) { | |
| 65 | printf("Read out of range\n"); | |
| 66 | return 1; | |
| 67 | } | |
| 68 | ||
| 69 | if (dev_desc->block_read(dev, offset + blk, cnt, addr) < 0) { | |
| 70 | printf("Error reading blocks\n"); | |
| 71 | return 1; | |
| 72 | } | |
| 73 | ||
| 74 | return 0; | |
| 75 | } | |
| 76 | ||
| 77 | U_BOOT_CMD( | |
| 78 | read, 6, 0, do_read, | |
| 79 | "Load binary data from a partition", | |
| 80 | "<interface> <dev[:part]> addr blk# cnt" | |
| 81 | ); |