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 <usb.h>
  16 #include <fat.h>
  17
  18 DECLARE_GLOBAL_DATA_PTR;
  19
  20 #ifdef CONFIG_USB_STORAGE
  21 static int usb_stor_curr_dev = -1; /* current device */
  22 #endif
  23
  24 void spl_usb_load_image(void)
  25 {
  26         int err;
  27         block_dev_desc_t *stor_dev;
  28
  29         usb_stop();
  30         err = usb_init();
  31         if (err) {
  32 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  33                 printf("%s: usb init failed: err - %d\n", __func__, err);
  34 #endif
  35                 hang();
  36         }
  37
  38 #ifdef CONFIG_USB_STORAGE
  39         /* try to recognize storage devices immediately */
  40         usb_stor_curr_dev = usb_stor_scan(1);
  41         stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
  42 #endif
  43
  44         debug("boot mode - FAT\n");
  45
  46 #ifdef CONFIG_SPL_OS_BOOT
  47                 if (spl_start_uboot() || spl_load_image_fat_os(stor_dev,
  48                                                                 CONFIG_SYS_USB_FAT_BOOT_PARTITION))
  49 #endif
  50                 err = spl_load_image_fat(stor_dev,
  51                                 CONFIG_SYS_USB_FAT_BOOT_PARTITION,
  52                                 CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
  53
  54                 if (err) {
  55                         puts("Error loading USB device\n");
  56                         hang();
  57                 }
  58 }