LXR uboot/cmd/usb_gadget

   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
  14static 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
  42exit:
  43        g_dnl_unregister();
  44exit_register:
  45        usb_gadget_release(controller_index);
  46
  47        return CMD_RET_FAILURE;
  48}
  49
  50U_BOOT_CMD(sdp, 2, 1, do_sdp,
  51        "Serial Downloader Protocol",
  52        "<USB_controller>\n"
  53        "  - serial downloader protocol via <USB_controller>\n"
  54);
  55