common/cmd_usb_mass_storage.c

   1 /*
   2  * Copyright (C) 2011 Samsung Electronics
   3  * Lukasz Majewski <l.majewski@samsung.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  18  * MA 02111-1307 USA
  19  */
  20
  21 #include <errno.h>
  22 #include <common.h>
  23 #include <command.h>
  24 #include <g_dnl.h>
  25 #include <usb_mass_storage.h>
  26
  27 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
  28                                int argc, char * const argv[])
  29 {
  30         char *ep;
  31         unsigned int dev_num = 0, offset = 0, part_size = 0;
  32         int rc;
  33
  34         struct ums_board_info *ums_info;
  35         static char *s = "ums";
  36
  37         if (argc < 2) {
  38                 printf("usage: ums <dev> - e.g. ums 0\n");
  39                 return 0;
  40         }
  41
  42         dev_num = (int)simple_strtoul(argv[1], &ep, 16);
  43
  44         if (dev_num) {
  45                 puts("\nSet eMMC device to 0! - e.g. ums 0\n");
  46                 goto fail;
  47         }
  48
  49         board_usb_init();
  50         ums_info = board_ums_init(dev_num, offset, part_size);
  51
  52         if (!ums_info) {
  53                 printf("MMC: %d -> NOT available\n", dev_num);
  54                 goto fail;
  55         }
  56         rc = fsg_init(ums_info);
  57         if (rc) {
  58                 printf("cmd ums: fsg_init failed\n");
  59                 goto fail;
  60         }
  61
  62         g_dnl_register(s);
  63
  64         while (1) {
  65                 /* Handle control-c and timeouts */
  66                 if (ctrlc()) {
  67                         printf("The remote end did not respond in time.\n");
  68                         goto exit;
  69                 }
  70                 usb_gadget_handle_interrupts();
  71                 /* Check if USB cable has been detached */
  72                 if (fsg_main_thread(NULL) == EIO)
  73                         goto exit;
  74         }
  75 exit:
  76         g_dnl_unregister();
  77         return 0;
  78
  79 fail:
  80         return -1;
  81 }
  82
  83 U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
  84         "Use the UMS [User Mass Storage]",
  85         "ums - User Mass Storage Gadget"
  86 );