rkspi.c
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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
);