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@@ -0,0 +1,85 @@
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+// SPDX-License-Identifier: GPL-2.0+
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+/*
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+ * Copyright 2022
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+ * Roger Knecht <rknecht@pm.de>
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+ */
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+
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+#include <common.h>
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+#include <command.h>
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+#include <display_options.h>
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+#include <fs.h>
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+#include <malloc.h>
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+#include <mapmem.h>
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+
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+static int do_xxd(struct cmd_tbl *cmdtp, int flag, int argc,
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+ char *const argv[])
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+{
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+ char *ifname;
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+ char *dev;
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+ char *file;
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+ char *buffer;
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+ phys_addr_t addr;
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+ loff_t file_size;
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+
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+ if (argc < 4)
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+ return CMD_RET_USAGE;
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+
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+ ifname = argv[1];
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+ dev = argv[2];
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+ file = argv[3];
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+
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+ // check file exists
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+ if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
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+ return CMD_RET_FAILURE;
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+
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+ if (!fs_exists(file)) {
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+ log_err("File does not exist: ifname=%s dev=%s file=%s\n", ifname, dev, file);
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ // get file size
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+ if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
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+ return CMD_RET_FAILURE;
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+
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+ if (fs_size(file, &file_size)) {
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+ log_err("Cannot read file size: ifname=%s dev=%s file=%s\n", ifname, dev, file);
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ // allocate memory for file content
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+ buffer = calloc(sizeof(char), file_size);
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+ if (!buffer) {
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+ log_err("Out of memory\n");
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ // map pointer to system memory
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+ addr = map_to_sysmem(buffer);
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+
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+ // read file to memory
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+ if (fs_set_blk_dev(ifname, dev, FS_TYPE_ANY))
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+ return CMD_RET_FAILURE;
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+
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+ if (fs_read(file, addr, 0, 0, &file_size)) {
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+ log_err("Cannot read file: ifname=%s dev=%s file=%s\n", ifname, dev, file);
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+ return CMD_RET_FAILURE;
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+ }
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+
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+ // print file content
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+ print_buffer(0, buffer, sizeof(char), file_size, 0);
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+
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+ free(buffer);
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+
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+ return 0;
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+}
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+
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+#ifdef CONFIG_SYS_LONGHELP
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+static char xxd_help_text[] =
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+ "<interface> <dev[:part]> <file>\n"
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+ " - Print file from 'dev' on 'interface' as hexdump to standard output\n";
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+#endif
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+
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+U_BOOT_CMD(xxd, 4, 1, do_xxd,
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+ "Print file as hexdump to standard output",
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+ xxd_help_text
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+);
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