u-boot/common/spl/spl_usb.c
Dan Murphy 8cffe5bd0d spl: common: Support for USB MSD FAT image loading
Add SPL support to be able to detect a USB Mass Storage device
connected to a USB host.  Once a USB Mass storage device is detected
the SPL will load the u-boot.img from a FAT partition to target address.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
2014-01-24 16:59:22 -05:00

59 lines
1.1 KiB
C

/*
* (C) Copyright 2014
* Texas Instruments, <www.ti.com>
*
* Dan Murphy <dmurphy@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*
* Derived work from spl_mmc.c
*/
#include <common.h>
#include <spl.h>
#include <asm/u-boot.h>
#include <usb.h>
#include <fat.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_USB_STORAGE
static int usb_stor_curr_dev = -1; /* current device */
#endif
void spl_usb_load_image(void)
{
int err;
block_dev_desc_t *stor_dev;
usb_stop();
err = usb_init();
if (err) {
#ifdef CONFIG_SPL_LIBCOMMON_SUPPORT
printf("%s: usb init failed: err - %d\n", __func__, err);
#endif
hang();
}
#ifdef CONFIG_USB_STORAGE
/* try to recognize storage devices immediately */
usb_stor_curr_dev = usb_stor_scan(1);
stor_dev = usb_stor_get_dev(usb_stor_curr_dev);
#endif
debug("boot mode - FAT\n");
#ifdef CONFIG_SPL_OS_BOOT
if (spl_start_uboot() || spl_load_image_fat_os(stor_dev,
CONFIG_SYS_USB_FAT_BOOT_PARTITION))
#endif
err = spl_load_image_fat(stor_dev,
CONFIG_SYS_USB_FAT_BOOT_PARTITION,
CONFIG_SPL_FAT_LOAD_PAYLOAD_NAME);
if (err) {
puts("Error loading USB device\n");
hang();
}
}