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 <g_dnl.h>
  11 #include <sdp.h>
  12 #include <usb.h>
  13
  14 static int do_sdp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  15 {
  16         int ret;
  17
  18         if (argc < 2)
  19                 return CMD_RET_USAGE;
  20
  21         char *usb_controller = argv[1];
  22         int controller_index = simple_strtoul(usb_controller, NULL, 0);
  23         usb_gadget_initialize(controller_index);
  24
  25         g_dnl_clear_detach();
  26         ret = g_dnl_register("usb_dnl_sdp");
  27         if (ret) {
  28                 pr_err("SDP dnl register failed: %d\n", ret);
  29                 goto exit_register;
  30         }
  31
  32         ret = sdp_init(controller_index);
  33         if (ret) {
  34                 pr_err("SDP init failed: %d\n", ret);
  35                 goto exit;
  36         }
  37
  38         /* This command typically does not return but jumps to an image */
  39         sdp_handle(controller_index);
  40         pr_err("SDP ended\n");
  41
  42 exit:
  43         g_dnl_unregister();
  44 exit_register:
  45         usb_gadget_release(controller_index);
  46
  47         return CMD_RET_FAILURE;
  48 }
  49
  50 U_BOOT_CMD(sdp, 2, 1, do_sdp,
  51         "Serial Downloader Protocol",
  52         "<USB_controller>\n"
  53         "  - serial downloader protocol via <USB_controller>\n"
  54 );