cmd/usb_gadget_sdp.c

   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
  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 );