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 <command.h>
  10 #include <g_dnl.h>
  11 #include <sdp.h>
  12 #include <usb.h>
  13 #include <linux/printk.h>
  14
  15 static int do_sdp(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  16 {
  17         int controller_index;
  18         struct udevice *udc;
  19         int ret;
  20
  21         if (argc < 2)
  22                 return CMD_RET_USAGE;
  23
  24         controller_index = simple_strtoul(argv[1], NULL, 0);
  25         ret = udc_device_get_by_index(controller_index, &udc);
  26         if (ret)
  27                 return ret;
  28
  29         g_dnl_clear_detach();
  30         ret = g_dnl_register("usb_dnl_sdp");
  31         if (ret) {
  32                 pr_err("SDP dnl register failed: %d\n", ret);
  33                 goto exit_register;
  34         }
  35
  36         ret = sdp_init(udc);
  37         if (ret) {
  38                 pr_err("SDP init failed: %d\n", ret);
  39                 goto exit;
  40         }
  41
  42         /* This command typically does not return but jumps to an image */
  43         sdp_handle(udc);
  44         pr_err("SDP ended\n");
  45
  46 exit:
  47         g_dnl_unregister();
  48 exit_register:
  49         udc_device_put(udc);
  50
  51         return CMD_RET_FAILURE;
  52 }
  53
  54 U_BOOT_CMD(sdp, 2, 1, do_sdp,
  55         "Serial Downloader Protocol",
  56         "<USB_controller>\n"
  57         "  - serial downloader protocol via <USB_controller>\n"
  58 );