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.h>
  13 #include <usb_mass_storage.h>
  14
  15 int do_usb_mass_storage(cmd_tbl_t *cmdtp, int flag,
  16                                int argc, char * const argv[])
  17 {
  18         if (argc < 3)
  19                 return CMD_RET_USAGE;
  20
  21         const char *usb_controller = argv[1];
  22         const char *mmc_devstring  = argv[2];
  23
  24         unsigned int dev_num = simple_strtoul(mmc_devstring, NULL, 0);
  25
  26         struct ums *ums = ums_init(dev_num);
  27         if (!ums)
  28                 return CMD_RET_FAILURE;
  29
  30         unsigned int controller_index = (unsigned int)(simple_strtoul(
  31                                         usb_controller, NULL, 0));
  32         if (board_usb_init(controller_index, USB_INIT_DEVICE)) {
  33                 error("Couldn't init USB controller.");
  34                 return CMD_RET_FAILURE;
  35         }
  36
  37         int rc = fsg_init(ums);
  38         if (rc) {
  39                 error("fsg_init failed");
  40                 return CMD_RET_FAILURE;
  41         }
  42
  43         g_dnl_register("ums");
  44
  45         while (1) {
  46                 usb_gadget_handle_interrupts();
  47
  48                 rc = fsg_main_thread(NULL);
  49                 if (rc) {
  50                         /* Check I/O error */
  51                         if (rc == -EIO)
  52                                 printf("\rCheck USB cable connection\n");
  53
  54                         /* Check CTRL+C */
  55                         if (rc == -EPIPE)
  56                                 printf("\rCTRL+C - Operation aborted\n");
  57
  58                         goto exit;
  59                 }
  60         }
  61 exit:
  62         g_dnl_unregister();
  63         return CMD_RET_SUCCESS;
  64 }
  65
  66 U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
  67         "Use the UMS [User Mass Storage]",
  68         "ums <USB_controller> <mmc_dev>  e.g. ums 0 0"
  69 );