1 files changed, 80 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/mtd/spi/spi_spl_load.c b/roms/u-boot/drivers/mtd/spi/spi_spl_load.c
new file mode 100644
index 00000000..1954b7e8
--- /dev/null
+++ b/roms/u-boot/drivers/mtd/spi/spi_spl_load.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2011 OMICRON electronics GmbH
+ *
+ * based on drivers/mtd/nand/nand_spl_load.c
+ *
+ * Copyright (C) 2011
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <spi_flash.h>
+#include <spl.h>
+
+#ifdef CONFIG_SPL_OS_BOOT
+/*
+ * Load the kernel, check for a valid header we can parse, and if found load
+ * the kernel and then device tree.
+ */
+static int spi_load_image_os(struct spi_flash *flash,
+			     struct image_header *header)
+{
+	/* Read for a header, parse or error out. */
+	spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40,
+		       (void *)header);
+
+	if (image_get_magic(header) != IH_MAGIC)
+		return -1;
+
+	spl_parse_image_header(header);
+
+	spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
+		       spl_image.size, (void *)spl_image.load_addr);
+
+	/* Read device tree. */
+	spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
+		       CONFIG_SYS_SPI_ARGS_SIZE,
+		       (void *)CONFIG_SYS_SPL_ARGS_ADDR);
+
+	return 0;
+}
+#endif
+
+/*
+ * The main entry for SPI booting. It's necessary that SDRAM is already
+ * configured and available since this code loads the main U-Boot image
+ * from SPI into SDRAM and starts it from there.
+ */
+void spl_spi_load_image(void)
+{
+	struct spi_flash *flash;
+	struct image_header *header;
+
+	/*
+	 * Load U-Boot image from SPI flash into RAM
+	 */
+
+	flash = spi_flash_probe(CONFIG_SPL_SPI_BUS, CONFIG_SPL_SPI_CS,
+				CONFIG_SF_DEFAULT_SPEED, SPI_MODE_3);
+	if (!flash) {
+		puts("SPI probe failed.\n");
+		hang();
+	}
+
+	/* use CONFIG_SYS_TEXT_BASE as temporary storage area */
+	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
+
+#ifdef CONFIG_SPL_OS_BOOT
+	if (spl_start_uboot() || spi_load_image_os(flash, header))
+#endif
+	{
+		/* Load u-boot, mkimage header is 64 bytes. */
+		spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
+			       (void *)header);
+		spl_parse_image_header(header);
+		spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
+			       spl_image.size, (void *)spl_image.load_addr);
+	}
+}