1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
3*4882a593Smuzhiyun * Use of this source code is governed by a BSD-style license that can be
4*4882a593Smuzhiyun * found in the LICENSE file.
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * Alternatively, this software may be distributed under the terms of the
7*4882a593Smuzhiyun * GNU General Public License ("GPL") version 2 as published by the Free
8*4882a593Smuzhiyun * Software Foundation.
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <common.h>
12*4882a593Smuzhiyun #include <command.h>
13*4882a593Smuzhiyun #include <part.h>
14*4882a593Smuzhiyun
do_read(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])15*4882a593Smuzhiyun int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun char *ep;
18*4882a593Smuzhiyun struct blk_desc *dev_desc = NULL;
19*4882a593Smuzhiyun int dev;
20*4882a593Smuzhiyun int part = 0;
21*4882a593Smuzhiyun disk_partition_t part_info;
22*4882a593Smuzhiyun ulong offset = 0u;
23*4882a593Smuzhiyun ulong limit = 0u;
24*4882a593Smuzhiyun void *addr;
25*4882a593Smuzhiyun uint blk;
26*4882a593Smuzhiyun uint cnt;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (argc != 6) {
29*4882a593Smuzhiyun cmd_usage(cmdtp);
30*4882a593Smuzhiyun return 1;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun dev = (int)simple_strtoul(argv[2], &ep, 16);
34*4882a593Smuzhiyun if (*ep) {
35*4882a593Smuzhiyun if (*ep != ':') {
36*4882a593Smuzhiyun printf("Invalid block device %s\n", argv[2]);
37*4882a593Smuzhiyun return 1;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun part = (int)simple_strtoul(++ep, NULL, 16);
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun dev_desc = blk_get_dev(argv[1], dev);
43*4882a593Smuzhiyun if (dev_desc == NULL) {
44*4882a593Smuzhiyun printf("Block device %s %d not supported\n", argv[1], dev);
45*4882a593Smuzhiyun return 1;
46*4882a593Smuzhiyun }
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun addr = (void *)simple_strtoul(argv[3], NULL, 16);
49*4882a593Smuzhiyun blk = simple_strtoul(argv[4], NULL, 16);
50*4882a593Smuzhiyun cnt = simple_strtoul(argv[5], NULL, 16);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun if (part != 0) {
53*4882a593Smuzhiyun if (part_get_info(dev_desc, part, &part_info)) {
54*4882a593Smuzhiyun printf("Cannot find partition %d\n", part);
55*4882a593Smuzhiyun return 1;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun offset = part_info.start;
58*4882a593Smuzhiyun limit = part_info.size;
59*4882a593Smuzhiyun } else {
60*4882a593Smuzhiyun /* Largest address not available in struct blk_desc. */
61*4882a593Smuzhiyun limit = ~0;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun if (cnt + blk > limit) {
65*4882a593Smuzhiyun printf("Read out of range\n");
66*4882a593Smuzhiyun return 1;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun if (blk_dread(dev_desc, offset + blk, cnt, addr) != cnt) {
70*4882a593Smuzhiyun printf("Error reading blocks\n");
71*4882a593Smuzhiyun return 1;
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
74*4882a593Smuzhiyun return 0;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun U_BOOT_CMD(
78*4882a593Smuzhiyun read, 6, 0, do_read,
79*4882a593Smuzhiyun "Load binary data from a partition",
80*4882a593Smuzhiyun "<interface> <dev[:part]> addr blk# cnt"
81*4882a593Smuzhiyun );
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