1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * cmd_sdp.c -- sdp command
4 *
5 * Copyright (C) 2016 Toradex
6 * Author: Stefan Agner <stefan.agner@toradex.com>
7 */
8
9 #include <common.h>
10 #include <command.h>
11 #include <g_dnl.h>
12 #include <sdp.h>
13 #include <usb.h>
14
do_sdp(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])15 static int do_sdp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
16 {
17 int ret;
18
19 if (argc < 2)
20 return CMD_RET_USAGE;
21
22 char *usb_controller = argv[1];
23 int controller_index = simple_strtoul(usb_controller, NULL, 0);
24 usb_gadget_initialize(controller_index);
25
26 g_dnl_clear_detach();
27 ret = g_dnl_register("usb_dnl_sdp");
28 if (ret) {
29 pr_err("SDP dnl register failed: %d\n", ret);
30 goto exit_register;
31 }
32
33 ret = sdp_init(controller_index);
34 if (ret) {
35 pr_err("SDP init failed: %d\n", ret);
36 goto exit;
37 }
38
39 /* This command typically does not return but jumps to an image */
40 sdp_handle(controller_index);
41 pr_err("SDP ended\n");
42
43 exit:
44 g_dnl_unregister();
45 exit_register:
46 usb_gadget_release(controller_index);
47
48 return CMD_RET_FAILURE;
49 }
50
51 U_BOOT_CMD(sdp, 2, 1, do_sdp,
52 "Serial Downloader Protocol",
53 "<USB_controller>\n"
54 " - serial downloader protocol via <USB_controller>\n"
55 );
56