rockchip: Add support for the SD image
The Rockchip boot ROM requires a particular file format. It consists of
64KB of zeroes, a 512-byte header encoded with RC4, and then some executable
code.
Add support to mkimage so that an SPL image (u-boot-spl-dtb.bin) can be
converted to this format.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/rksd.c b/tools/rksd.c
new file mode 100644
index 0000000..2efcd68
--- /dev/null
+++ b/tools/rksd.c
@@ -0,0 +1,102 @@
+/*
+ * (C) Copyright 2015 Google, Inc
+ * Written by Simon Glass <sjg@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ *
+ * See README.rockchip for details of the rksd format
+ */
+
+#include "imagetool.h"
+#include <image.h>
+#include <rc4.h>
+#include "mkimage.h"
+#include "rkcommon.h"
+
+enum {
+ RKSD_HEADER0_START = 64 * RK_BLK_SIZE,
+ RKSD_SPL_HDR_START = RKSD_HEADER0_START +
+ RK_CODE1_OFFSET * RK_BLK_SIZE,
+ RKSD_SPL_START = RKSD_SPL_HDR_START + 4,
+ RKSD_HEADER_LEN = RKSD_SPL_START,
+};
+
+static char dummy_hdr[RKSD_HEADER_LEN];
+
+static int rksd_check_params(struct image_tool_params *params)
+{
+ return 0;
+}
+
+static int rksd_verify_header(unsigned char *buf, int size,
+ struct image_tool_params *params)
+{
+ return 0;
+}
+
+static void rksd_print_header(const void *buf)
+{
+}
+
+static void rksd_set_header(void *buf, struct stat *sbuf, int ifd,
+ struct image_tool_params *params)
+{
+ unsigned int size;
+ int ret;
+
+ /* Zero the whole header. The first 32KB is empty */
+ memset(buf, '\0', RKSD_HEADER0_START);
+
+ size = params->file_size - RKSD_SPL_HDR_START;
+ ret = rkcommon_set_header(buf + RKSD_HEADER0_START, size);
+ if (ret) {
+ /* TODO(sjg@chromium.org): This method should return an error */
+ printf("Warning: SPL image is too large (size %#x) and will not boot\n",
+ size);
+ }
+
+ memcpy(buf + RKSD_SPL_HDR_START, "RK32", 4);
+}
+
+static int rksd_extract_subimage(void *buf, struct image_tool_params *params)
+{
+ return 0;
+}
+
+static int rksd_check_image_type(uint8_t type)
+{
+ if (type == IH_TYPE_RKSD)
+ return EXIT_SUCCESS;
+ else
+ return EXIT_FAILURE;
+}
+
+/* We pad the file out to a fixed size - this method returns that size */
+static int rksd_vrec_header(struct image_tool_params *params,
+ struct image_type_params *tparams)
+{
+ int pad_size;
+
+ pad_size = RKSD_SPL_HDR_START + RK_MAX_CODE1_SIZE;
+ debug("pad_size %x\n", pad_size);
+
+ return pad_size - params->file_size;
+}
+
+/*
+ * rk_sd parameters
+ */
+U_BOOT_IMAGE_TYPE(
+ rksd,
+ "Rockchip SD Boot Image support",
+ RKSD_HEADER_LEN,
+ dummy_hdr,
+ rksd_check_params,
+ rksd_verify_header,
+ rksd_print_header,
+ rksd_set_header,
+ rksd_extract_subimage,
+ rksd_check_image_type,
+ NULL,
+ rksd_vrec_header
+);