common/spl/spl_usb.c

   1 /*
   2  * (C) Copyright 2014
   3  * Texas Instruments, <www.ti.com>
   4  *
   5  * Dan Murphy <dmurphy@ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  *
   9  * Derived work from spl_mmc.c
  10  */
  11
  12 #include <common.h>
  13 #include <spl.h>
  14 #include <asm/u-boot.h>
  15 #include <errno.h>
  16 #include <usb.h>
  17 #include <fat.h>
  18
  19 DECLARE_GLOBAL_DATA_PTR;
  20
  21 #ifdef CONFIG_USB_STORAGE
  22 static int usb_stor_curr_dev = -1; /* current device */
  23 #endif
  24
  25 int spl_usb_load_image(void)
  26 {
  27         int err;
  28         struct blk_desc *stor_dev;
  29
  30         usb_stop();
  31         err = usb_init();
  32         if (err) {
  33 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  34                 printf("%s: usb init failed: err - %d\n", __func__, err);
  35 #endif
  36                 return err;
  37         }
  38
  39 #ifdef CONFIG_USB_STORAGE
  40         /* try to recognize storage devices immediately */
  41         usb_stor_curr_dev = usb_stor_scan(1);
  42         stor_dev = blk_get_devnum_by_type(IF_TYPE_USB, usb_stor_curr_dev);
  43         if (!stor_dev)
  44                 return -ENODEV;
  45 #endif
  46
  47         debug("boot mode - FAT\n");
  48
  49 #ifdef CONFIG_SPL_OS_BOOT
  50                 if (spl_start_uboot() || spl_load_image_fat_os(stor_dev,
  51                                                                 CONFIG_SYS_USB_FAT_BOOT_PARTITION))
  52 #endif
  53                 err = spl_load_image_fat(stor_dev,
  54                                 CONFIG_SYS_USB_FAT_BOOT_PARTITION,
  55                                 CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
  56
  57         if (err) {
  58                 puts("Error loading from USB device\n");
  59                 return err;
  60         }
  61
  62         return 0;
  63 }