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