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 int spl_usb_load(struct spl_image_info *spl_image,
  22                  struct spl_boot_device *bootdev, int partition,
  23                  const char *filename)
  24 {
  25         int err = 0;
  26         struct blk_desc *stor_dev;
  27         static bool usb_init_pending = true;
  28
  29         if (usb_init_pending) {
  30                 usb_stop();
  31                 err = usb_init();
  32                 usb_init_pending = false;
  33         }
  34
  35         if (err) {
  36 #ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
  37                 printf("%s: usb init failed: err - %d\n", __func__, err);
  38 #endif
  39                 return err;
  40         }
  41
  42         /* try to recognize storage devices immediately */
  43         usb_stor_curr_dev = usb_stor_scan(1);
  44         stor_dev = blk_get_devnum_by_type(IF_TYPE_USB, usb_stor_curr_dev);
  45         if (!stor_dev)
  46                 return -ENODEV;
  47
  48         debug("boot mode - FAT\n");
  49
  50 #if CONFIG_IS_ENABLED(OS_BOOT)
  51         if (spl_start_uboot() ||
  52             spl_load_image_fat_os(spl_image, bootdev, stor_dev, partition))
  53 #endif
  54         {
  55                 err = spl_load_image_fat(spl_image, bootdev, stor_dev, partition, filename);
  56         }
  57
  58         if (err) {
  59                 puts("Error loading from USB device\n");
  60                 return err;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static int spl_usb_load_image(struct spl_image_info *spl_image,
  67                               struct spl_boot_device *bootdev)
  68 {
  69         return spl_usb_load(spl_image, bootdev,
  70                             CONFIG_SYS_USB_FAT_BOOT_PARTITION,
  71                             CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
  72 }
  73 SPL_LOAD_IMAGE_METHOD("USB", 0, BOOT_DEVICE_USB, spl_usb_load_image);