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 <command.h>
  11#include <g_dnl.h>
  12#include <sdp.h>
  13#include <usb.h>
  14
  15static 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
  43exit:
  44        g_dnl_unregister();
  45exit_register:
  46        usb_gadget_release(controller_index);
  47
  48        return CMD_RET_FAILURE;
  49}
  50
  51U_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