common/cmd_usb_mass_storage.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics
   3  * Lukasz Majewski <l.majewski@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <errno.h>
   9 #include <common.h>
  10 #include <command.h>
  11 #include <g_dnl.h>
  12 #include <usb_mass_storage.h>
  13
  14 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
  15                                int argc, char * const argv[])
  16 {
  17         char *ep;
  18         unsigned int dev_num = 0, offset = 0, part_size = 0;
  19         int rc;
  20
  21         struct ums_board_info *ums_info;
  22         static char *s = "ums";
  23
  24         if (argc < 2) {
  25                 printf("usage: ums <dev> - e.g. ums 0\n");
  26                 return 0;
  27         }
  28
  29         dev_num = (int)simple_strtoul(argv[1], &ep, 16);
  30
  31         if (dev_num) {
  32                 puts("\nSet eMMC device to 0! - e.g. ums 0\n");
  33                 goto fail;
  34         }
  35
  36         board_usb_init();
  37         ums_info = board_ums_init(dev_num, offset, part_size);
  38
  39         if (!ums_info) {
  40                 printf("MMC: %d -> NOT available\n", dev_num);
  41                 goto fail;
  42         }
  43         rc = fsg_init(ums_info);
  44         if (rc) {
  45                 printf("cmd ums: fsg_init failed\n");
  46                 goto fail;
  47         }
  48
  49         g_dnl_register(s);
  50
  51         while (1) {
  52                 /* Handle control-c and timeouts */
  53                 if (ctrlc()) {
  54                         printf("The remote end did not respond in time.\n");
  55                         goto exit;
  56                 }
  57                 usb_gadget_handle_interrupts();
  58                 /* Check if USB cable has been detached */
  59                 if (fsg_main_thread(NULL) == EIO)
  60                         goto exit;
  61         }
  62 exit:
  63         g_dnl_unregister();
  64         return 0;
  65
  66 fail:
  67         return -1;
  68 }
  69
  70 U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
  71         "Use the UMS [User Mass Storage]",
  72         "ums - User Mass Storage Gadget"
  73 );