1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2022
4 * Roger Knecht <rknecht@pm.de>
5 */
6
7#include <common.h>
8#include <command.h>
9#include <display_options.h>
10#include <fs.h>
11#include <malloc.h>
12#include <mapmem.h>
13
14static int do_xxd(struct cmd_tbl *cmdtp, int flag, int argc,
15		  char *const argv[])
16{
17	char *ifname;
18	char *dev;
19	char *file;
20	char *buffer;
21	phys_addr_t addr;
22	loff_t file_size;
23
24	if (argc < 4)
25		return CMD_RET_USAGE;
26
27	ifname = argv[1];
28	dev = argv[2];
29	file = argv[3];
30
31	// check file exists
32	if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
33		return CMD_RET_FAILURE;
34
35	if (!fs_exists(file)) {
36		log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
37		return CMD_RET_FAILURE;
38	}
39
40	// get file size
41	if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
42		return CMD_RET_FAILURE;
43
44	if (fs_size(file, &file_size)) {
45		log_err("Cannot read file size: ifname=%s dev=%s file=%s\n", ifname, dev, file);
46		return CMD_RET_FAILURE;
47	}
48
49	// allocate memory for file content
50	buffer = calloc(sizeof(char), file_size);
51	if (!buffer) {
52		log_err("Out of memory\n");
53		return CMD_RET_FAILURE;
54	}
55
56	// map pointer to system memory
57	addr = map_to_sysmem(buffer);
58
59	// read file to memory
60	if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
61		return CMD_RET_FAILURE;
62
63	if (fs_read(file, addr, 0, 0, &file_size)) {
64		log_err("Cannot read file: ifname=%s dev=%s file=%s\n", ifname, dev, file);
65		return CMD_RET_FAILURE;
66	}
67
68	// print file content
69	print_buffer(0, buffer, sizeof(char), file_size, 0);
70
71	free(buffer);
72
73	return 0;
74}
75
76U_BOOT_LONGHELP(xxd,
77	"<interface> <dev[:part]> <file>\n"
78	"  - Print file from 'dev' on 'interface' as hexdump to standard output\n");
79
80U_BOOT_CMD(xxd, 4, 1, do_xxd,
81	   "Print file as hexdump to standard output",
82	   xxd_help_text
83);
84