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 static int spl_usb_load_image(struct spl_image_info *spl_image,
  26                               struct spl_boot_device *bootdev)
  27 {
  28         int err;
  29         struct blk_desc *stor_dev;
  30
  31         usb_stop();
  32         err = usb_init();
  33         if (err) {
  34 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  35                 printf("%s: usb init failed: err - %d\n", __func__, err);
  36 #endif
  37                 return err;
  38         }
  39
  40 #ifdef CONFIG_USB_STORAGE
  41         /* try to recognize storage devices immediately */
  42         usb_stor_curr_dev = usb_stor_scan(1);
  43         stor_dev = blk_get_devnum_by_type(IF_TYPE_USB, usb_stor_curr_dev);
  44         if (!stor_dev)
  45                 return -ENODEV;
  46 #endif
  47
  48         debug("boot mode - FAT\n");
  49
  50 #ifdef CONFIG_SPL_OS_BOOT
  51         if (spl_start_uboot() ||
  52             spl_load_image_fat_os(spl_image, stor_dev,
  53                                   CONFIG_SYS_USB_FAT_BOOT_PARTITION))
  54 #endif
  55         {
  56                 err = spl_load_image_fat(spl_image, stor_dev,
  57                                         CONFIG_SYS_USB_FAT_BOOT_PARTITION,
  58                                         CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
  59         }
  60
  61         if (err) {
  62                 puts("Error loading from USB device\n");
  63                 return err;
  64         }
  65
  66         return 0;
  67 }
  68 SPL_LOAD_IMAGE_METHOD(0, BOOT_DEVICE_USB, spl_usb_load_image);