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 <[email protected]>
   7  *
   8  * Derived work from spl_mmc.c
   9  */
  10
  11 #include <log.h>
  12 #include <spl.h>
  13 #include <errno.h>
  14 #include <usb.h>
  15 #include <fat.h>
  16
  17 static int usb_stor_curr_dev = -1; /* current device */
  18
  19 int spl_usb_load(struct spl_image_info *spl_image,
  20                  struct spl_boot_device *bootdev, int partition,
  21                  const char *filename)
  22 {
  23         int err = 0;
  24         struct blk_desc *stor_dev;
  25         static bool usb_init_pending = true;
  26
  27         if (usb_init_pending) {
  28                 usb_stop();
  29                 err = usb_init();
  30                 usb_init_pending = false;
  31         }
  32
  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         /* try to recognize storage devices immediately */
  41         usb_stor_curr_dev = usb_stor_scan(1);
  42         stor_dev = blk_get_devnum_by_uclass_id(UCLASS_USB, usb_stor_curr_dev);
  43         if (!stor_dev)
  44                 return -ENODEV;
  45
  46         debug("boot mode - FAT\n");
  47
  48 #if CONFIG_IS_ENABLED(OS_BOOT)
  49         if (spl_start_uboot() ||
  50             spl_load_image_fat_os(spl_image, bootdev, stor_dev, partition))
  51 #endif
  52         {
  53                 err = spl_load_image_fat(spl_image, bootdev, stor_dev, partition, filename);
  54         }
  55
  56         if (err) {
  57                 puts("Error loading from USB device\n");
  58                 return err;
  59         }
  60
  61         return 0;
  62 }
  63
  64 static int spl_usb_load_image(struct spl_image_info *spl_image,
  65                               struct spl_boot_device *bootdev)
  66 {
  67         return spl_usb_load(spl_image, bootdev,
  68                             CONFIG_SYS_USB_FAT_BOOT_PARTITION,
  69                             CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
  70 }
  71 SPL_LOAD_IMAGE_METHOD("USB", 0, BOOT_DEVICE_USB, spl_usb_load_image);