LXR uboot/tools/rkspi.c

   1/*
   2 * (C) Copyright 2015 Google,  Inc
   3 * Written by Simon Glass <sjg@chromium.org>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 *
   7 * See README.rockchip for details of the rkspi format
   8 */
   9
  10#include "imagetool.h"
  11#include <image.h>
  12#include <rc4.h>
  13#include "mkimage.h"
  14#include "rkcommon.h"
  15
  16enum {
  17        RKSPI_SECT_LEN          = RK_BLK_SIZE * 4,
  18};
  19
  20static char dummy_hdr[RK_IMAGE_HEADER_LEN];
  21
  22static int rkspi_verify_header(unsigned char *buf, int size,
  23                               struct image_tool_params *params)
  24{
  25        return 0;
  26}
  27
  28static void rkspi_print_header(const void *buf)
  29{
  30}
  31
  32static void rkspi_set_header(void *buf, struct stat *sbuf, int ifd,
  33                             struct image_tool_params *params)
  34{
  35        int sector;
  36        unsigned int size;
  37        int ret;
  38
  39        size = params->orig_file_size;
  40        ret = rkcommon_set_header(buf, size, params);
  41        debug("size %x\n", size);
  42        if (ret) {
  43                /* TODO(sjg@chromium.org): This method should return an error */
  44                printf("Warning: SPL image is too large (size %#x) and will not boot\n",
  45                       size);
  46        }
  47
  48        memcpy(buf + RK_SPL_HDR_START, rkcommon_get_spl_hdr(params),
  49               RK_SPL_HDR_SIZE);
  50
  51        /*
  52         * Spread the image out so we only use the first 2KB of each 4KB
  53         * region. This is a feature of the SPI format required by the Rockchip
  54         * boot ROM. Its rationale is unknown.
  55         */
  56        for (sector = size / RKSPI_SECT_LEN - 1; sector >= 0; sector--) {
  57                debug("sector %u\n", sector);
  58                memmove(buf + sector * RKSPI_SECT_LEN * 2,
  59                        buf + sector * RKSPI_SECT_LEN,
  60                        RKSPI_SECT_LEN);
  61                memset(buf + sector * RKSPI_SECT_LEN * 2 + RKSPI_SECT_LEN,
  62                       '\0', RKSPI_SECT_LEN);
  63        }
  64}
  65
  66static int rkspi_extract_subimage(void *buf, struct image_tool_params *params)
  67{
  68        return 0;
  69}
  70
  71static int rkspi_check_image_type(uint8_t type)
  72{
  73        if (type == IH_TYPE_RKSPI)
  74                return EXIT_SUCCESS;
  75        else
  76                return EXIT_FAILURE;
  77}
  78
  79/* We pad the file out to a fixed size - this method returns that size */
  80static int rkspi_vrec_header(struct image_tool_params *params,
  81                             struct image_type_params *tparams)
  82{
  83        int pad_size;
  84
  85        pad_size = (rkcommon_get_spl_size(params) + 0x7ff) / 0x800 * 0x800;
  86        params->orig_file_size = pad_size;
  87
  88        /* We will double the image size due to the SPI format */
  89        pad_size *= 2;
  90        pad_size += RK_SPL_HDR_START;
  91        debug("pad_size %x\n", pad_size);
  92
  93        return pad_size - params->file_size;
  94}
  95
  96/*
  97 * rk_spi parameters
  98 */
  99U_BOOT_IMAGE_TYPE(
 100        rkspi,
 101        "Rockchip SPI Boot Image support",
 102        RK_IMAGE_HEADER_LEN,
 103        dummy_hdr,
 104        rkcommon_check_params,
 105        rkspi_verify_header,
 106        rkspi_print_header,
 107        rkspi_set_header,
 108        rkspi_extract_subimage,
 109        rkspi_check_image_type,
 110        NULL,
 111        rkspi_vrec_header
 112);
 113