git.sur5r.net Git - u-boot/blob - 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 #ifdef CONFIG_USB_STORAGE
  20 static int usb_stor_curr_dev = -1; /* current device */
  21 #endif
  22
  23 static int spl_usb_load_image(struct spl_image_info *spl_image,
  24                               struct spl_boot_device *bootdev)
  25 {
  26         int err;
  27         struct blk_desc *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                 return err;
  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 = blk_get_devnum_by_type(IF_TYPE_USB, usb_stor_curr_dev);
  42         if (!stor_dev)
  43                 return -ENODEV;
  44 #endif
  45
  46         debug("boot mode - FAT\n");
  47
  48 #ifdef CONFIG_SPL_OS_BOOT
  49         if (spl_start_uboot() ||
  50             spl_load_image_fat_os(spl_image, stor_dev,
  51                                   CONFIG_SYS_USB_FAT_BOOT_PARTITION))
  52 #endif
  53         {
  54                 err = spl_load_image_fat(spl_image, stor_dev,
  55                                         CONFIG_SYS_USB_FAT_BOOT_PARTITION,
  56                                         CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
  57         }
  58
  59         if (err) {
  60                 puts("Error loading from USB device\n");
  61                 return err;
  62         }
  63
  64         return 0;
  65 }
  66 SPL_LOAD_IMAGE_METHOD("USB", 0, BOOT_DEVICE_USB, spl_usb_load_image);