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 <common.h>
   9 #include <command.h>
  10 #include <g_dnl.h>
  11 #include <usb.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         if (argc < 3)
  18                 return CMD_RET_USAGE;
  19
  20         const char *usb_controller = argv[1];
  21         const char *mmc_devstring  = argv[2];
  22
  23         unsigned int dev_num = (unsigned int)(simple_strtoul(mmc_devstring,
  24                                 NULL, 0));
  25         if (dev_num) {
  26                 error("Set eMMC device to 0! - e.g. ums 0");
  27                 goto fail;
  28         }
  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                 goto fail;
  35         }
  36
  37         struct ums_board_info *ums_info = board_ums_init(dev_num, 0, 0);
  38         if (!ums_info) {
  39                 error("MMC: %d -> NOT available", dev_num);
  40                 goto fail;
  41         }
  42
  43         int rc = fsg_init(ums_info);
  44         if (rc) {
  45                 error("fsg_init failed");
  46                 goto fail;
  47         }
  48
  49         g_dnl_register("ums");
  50
  51         while (1) {
  52                 /* Handle control-c and timeouts */
  53                 if (ctrlc()) {
  54                         error("The remote end did not respond in time.");
  55                         goto exit;
  56                 }
  57
  58                 usb_gadget_handle_interrupts();
  59                 /* Check if USB cable has been detached */
  60                 if (fsg_main_thread(NULL) == EIO)
  61                         goto exit;
  62         }
  63 exit:
  64         g_dnl_unregister();
  65         return 0;
  66
  67 fail:
  68         return -1;
  69 }
  70
  71 U_BOOT_CMD(ums, CONFIG_SYS_MAXARGS, 1, do_usb_mass_storage,
  72         "Use the UMS [User Mass Storage]",
  73         "<USB_controller> <mmc_dev>"
  74 );