1 files changed, 92 insertions, 0 deletions
diff --git a/roms/u-boot/tools/rkspi.c b/roms/u-boot/tools/rkspi.c
new file mode 100644
index 000000000..f2530f7bd
--- /dev/null
+++ b/roms/u-boot/tools/rkspi.c
@@ -0,0 +1,92 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2015 Google,  Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * See README.rockchip for details of the rkspi format
+ */
+
+#include "imagetool.h"
+#include <image.h>
+#include <rc4.h>
+#include "mkimage.h"
+#include "rkcommon.h"
+
+enum {
+	RKSPI_SECT_LEN		= RK_BLK_SIZE * 4,
+};
+
+static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
+			     struct image_tool_params *params)
+{
+	int sector;
+	unsigned int size;
+
+	size = params->orig_file_size;
+
+	rkcommon_set_header(buf, sbuf, ifd, params);
+
+	/*
+	 * Spread the image out so we only use the first 2KB of each 4KB
+	 * region. This is a feature of the SPI format required by the Rockchip
+	 * boot ROM. Its rationale is unknown.
+	 */
+	if (params->vflag)
+		fprintf(stderr, "Spreading spi image from %u to %u\n",
+			size, params->file_size);
+
+	for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
+		debug("sector %u\n", sector);
+		memmove(buf + sector * RKSPI_SECT_LEN * 2,
+			buf + sector * RKSPI_SECT_LEN,
+			RKSPI_SECT_LEN);
+		memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
+		       '\0', RKSPI_SECT_LEN);
+	}
+}
+
+static int rkspi_check_image_type(uint8_t type)
+{
+	if (type == IH_TYPE_RKSPI)
+		return EXIT_SUCCESS;
+	else
+		return EXIT_FAILURE;
+}
+
+/*
+ * The SPI payload needs to make space for odd half-sector layout used in flash
+ * (i.e. only the first 2K of each 4K sector is used).
+ */
+static int rkspi_vrec_header(struct image_tool_params *params,
+			     struct image_type_params *tparams)
+{
+	rkcommon_vrec_header(params, tparams);
+
+	/*
+	 * Converting to the SPI format (i.e. splitting each 4K page into two
+	 * 2K subpages and then padding these 2K pages up to take a complete
+	 * 4K sector again) which will double the image size.
+	 */
+	params->file_size = ROUND(params->file_size, RKSPI_SECT_LEN) << 1;
+
+	/* Ignoring pad len, since we are using our own copy_image() */
+	return 0;
+}
+
+/*
+ * rk_spi parameters
+ */
+U_BOOT_IMAGE_TYPE(
+	rkspi,
+	"Rockchip SPI Boot Image support",
+	0,
+	NULL,
+	rkcommon_check_params,
+	rkcommon_verify_header,
+	rkcommon_print_header,
+	rkspi_set_header,
+	NULL,
+	rkspi_check_image_type,
+	NULL,
+	rkspi_vrec_header
+);