GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/common/spl/spl_usb.c

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2014
+ * Texas Instruments, <www.ti.com>
+ *
+ * Dan Murphy <dmurphy@ti.com>
+ *
+ * Derived work from spl_mmc.c
+ */
+
+#include <common.h>
+#include <spl.h>
+#include <asm/u-boot.h>
+#include <errno.h>
+#include <usb.h>
+#include <fat.h>
+
+static int usb_stor_curr_dev = -1; /* current device */
+
+static int spl_usb_load_image(struct spl_image_info *spl_image,
+			      struct spl_boot_device *bootdev)
+{
+	int err;
+	struct blk_desc *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
+		return err;
+	}
+
+	/* try to recognize storage devices immediately */
+	usb_stor_curr_dev = usb_stor_scan(1);
+	stor_dev = blk_get_devnum_by_type(IF_TYPE_USB, usb_stor_curr_dev);
+	if (!stor_dev)
+		return -ENODEV;
+
+	debug("boot mode - FAT\n");
+
+#ifdef CONFIG_SPL_OS_BOOT
+	if (spl_start_uboot() ||
+	    spl_load_image_fat_os(spl_image, stor_dev,
+				  CONFIG_SYS_USB_FAT_BOOT_PARTITION))
+#endif
+	{
+		err = spl_load_image_fat(spl_image, stor_dev,
+					CONFIG_SYS_USB_FAT_BOOT_PARTITION,
+					CONFIG_SPL_FS_LOAD_PAYLOAD_NAME);
+	}
+
+	if (err) {
+		puts("Error loading from USB device\n");
+		return err;
+	}
+
+	return 0;
+}
+SPL_LOAD_IMAGE_METHOD("USB", 0, BOOT_DEVICE_USB, spl_usb_load_image);