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https://github.com/AsahiLinux/u-boot
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2a981dc2c6
To ease conversion to driver model, add helper functions which deal with calling each block device method. With driver model we can reimplement these functions with the same arguments. Use inline functions to avoid increasing code size on some boards. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Tested-by: Stephen Warren <swarren@nvidia.com>
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(cmd_tbl_t *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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disk_partition_t 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)simple_strtoul(argv[2], &ep, 16);
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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)simple_strtoul(++ep, NULL, 16);
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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 *)simple_strtoul(argv[3], NULL, 16);
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blk = simple_strtoul(argv[4], NULL, 16);
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cnt = simple_strtoul(argv[5], NULL, 16);
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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_read(dev_desc, offset + blk, cnt, addr) < 0) {
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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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