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- // 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
- );
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