mirror of
https://github.com/AsahiLinux/u-boot
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7e5f460ec4
It is a pain to have to specify the value 16 in each call. Add a new hextoul() function and update the code to use it. Add a proper comment to simple_strtoul() while we are here. Signed-off-by: Simon Glass <sjg@chromium.org>
81 lines
1.7 KiB
C
81 lines
1.7 KiB
C
/*
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* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*/
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#include <common.h>
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#include <command.h>
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#include <part.h>
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int do_read(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
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{
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char *ep;
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struct blk_desc *dev_desc = NULL;
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int dev;
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int part = 0;
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struct disk_partition part_info;
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ulong offset = 0u;
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ulong limit = 0u;
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void *addr;
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uint blk;
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uint cnt;
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if (argc != 6) {
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cmd_usage(cmdtp);
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return 1;
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}
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dev = (int)hextoul(argv[2], &ep);
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if (*ep) {
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if (*ep != ':') {
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printf("Invalid block device %s\n", argv[2]);
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return 1;
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}
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part = (int)hextoul(++ep, NULL);
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}
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dev_desc = blk_get_dev(argv[1], dev);
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if (dev_desc == NULL) {
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printf("Block device %s %d not supported\n", argv[1], dev);
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return 1;
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}
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addr = (void *)hextoul(argv[3], NULL);
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blk = hextoul(argv[4], NULL);
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cnt = hextoul(argv[5], NULL);
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if (part != 0) {
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if (part_get_info(dev_desc, part, &part_info)) {
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printf("Cannot find partition %d\n", part);
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return 1;
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}
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offset = part_info.start;
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limit = part_info.size;
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} else {
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/* Largest address not available in struct blk_desc. */
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limit = ~0;
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}
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if (cnt + blk > limit) {
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printf("Read out of range\n");
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return 1;
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}
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if (blk_dread(dev_desc, offset + blk, cnt, addr) != cnt) {
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printf("Error reading blocks\n");
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return 1;
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}
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return 0;
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}
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U_BOOT_CMD(
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read, 6, 0, do_read,
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"Load binary data from a partition",
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"<interface> <dev[:part]> addr blk# cnt"
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);
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