/*
|
* (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 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
|
);
|
