common/spl/spl_usb.c

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