LXR uboot/tools/rkspi.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2015 Google,  Inc
   4 * Written by Simon Glass <sjg@chromium.org>
   5 *
   6 * See README.rockchip for details of the rkspi format
   7 */
   8
   9#include "imagetool.h"
  10#include <image.h>
  11#include <rc4.h>
  12#include "mkimage.h"
  13#include "rkcommon.h"
  14
  15enum {
  16        RKSPI_SECT_LEN          = RK_BLK_SIZE * 4,
  17};
  18
  19static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
  20                             struct image_tool_params *params)
  21{
  22        int sector;
  23        unsigned int size;
  24
  25        size = params->orig_file_size;
  26
  27        rkcommon_set_header(buf, sbuf, ifd, params);
  28
  29        /*
  30         * Spread the image out so we only use the first 2KB of each 4KB
  31         * region. This is a feature of the SPI format required by the Rockchip
  32         * boot ROM. Its rationale is unknown.
  33         */
  34        if (params->vflag)
  35                fprintf(stderr, "Spreading spi image from %u to %u\n",
  36                        size, params->file_size);
  37
  38        for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
  39                debug("sector %u\n", sector);
  40                memmove(buf + sector * RKSPI_SECT_LEN * 2,
  41                        buf + sector * RKSPI_SECT_LEN,
  42                        RKSPI_SECT_LEN);
  43                memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
  44                       '\0', RKSPI_SECT_LEN);
  45        }
  46}
  47
  48static int rkspi_check_image_type(uint8_t type)
  49{
  50        if (type == IH_TYPE_RKSPI)
  51                return EXIT_SUCCESS;
  52        else
  53                return EXIT_FAILURE;
  54}
  55
  56/*
  57 * The SPI payload needs to make space for odd half-sector layout used in flash
  58 * (i.e. only the first 2K of each 4K sector is used).
  59 */
  60static int rkspi_vrec_header(struct image_tool_params *params,
  61                             struct image_type_params *tparams)
  62{
  63        rkcommon_vrec_header(params, tparams);
  64
  65        /*
  66         * Converting to the SPI format (i.e. splitting each 4K page into two
  67         * 2K subpages and then padding these 2K pages up to take a complete
  68         * 4K sector again) which will double the image size.
  69         */
  70        params->file_size = ROUND(params->file_size, RKSPI_SECT_LEN) << 1;
  71
  72        /* Ignoring pad len, since we are using our own copy_image() */
  73        return 0;
  74}
  75
  76/*
  77 * rk_spi parameters
  78 */
  79U_BOOT_IMAGE_TYPE(
  80        rkspi,
  81        "Rockchip SPI Boot Image support",
  82        0,
  83        NULL,
  84        rkcommon_check_params,
  85        rkcommon_verify_header,
  86        rkcommon_print_header,
  87        rkspi_set_header,
  88        NULL,
  89        rkspi_check_image_type,
  90        NULL,
  91        rkspi_vrec_header
  92);
  93