tools/rksd.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 rksd format
   8  */
   9
  10 #include "imagetool.h"
  11 #include <image.h>
  12 #include <rc4.h>
  13 #include "mkimage.h"
  14 #include "rkcommon.h"
  15
  16 static char dummy_hdr[RK_IMAGE_HEADER_LEN];
  17
  18 static int rksd_verify_header(unsigned char *buf,  int size,
  19                                  struct image_tool_params *params)
  20 {
  21         return 0;
  22 }
  23
  24 static void rksd_print_header(const void *buf)
  25 {
  26 }
  27
  28 static void rksd_set_header(void *buf,  struct stat *sbuf,  int ifd,
  29                                struct image_tool_params *params)
  30 {
  31         unsigned int size;
  32         int ret;
  33
  34         size = params->file_size - RK_SPL_HDR_START;
  35         ret = rkcommon_set_header(buf, size, params);
  36         if (ret) {
  37                 /* TODO(sjg@chromium.org): This method should return an error */
  38                 printf("Warning: SPL image is too large (size %#x) and will not boot\n",
  39                        size);
  40         }
  41
  42         memcpy(buf + RK_SPL_HDR_START, rkcommon_get_spl_hdr(params),
  43                RK_SPL_HDR_SIZE);
  44
  45         if (rkcommon_need_rc4_spl(params))
  46                 rkcommon_rc4_encode_spl(buf, RK_SPL_START - 4,
  47                                         params->file_size - RK_SPL_START + 4);
  48 }
  49
  50 static int rksd_extract_subimage(void *buf,  struct image_tool_params *params)
  51 {
  52         return 0;
  53 }
  54
  55 static int rksd_check_image_type(uint8_t type)
  56 {
  57         if (type == IH_TYPE_RKSD)
  58                 return EXIT_SUCCESS;
  59         else
  60                 return EXIT_FAILURE;
  61 }
  62
  63 /* We pad the file out to a fixed size - this method returns that size */
  64 static int rksd_vrec_header(struct image_tool_params *params,
  65                             struct image_type_params *tparams)
  66 {
  67         int pad_size;
  68
  69         pad_size = RK_SPL_HDR_START + rkcommon_get_spl_size(params);
  70         debug("pad_size %x\n", pad_size);
  71
  72         return pad_size - params->file_size;
  73 }
  74
  75 /*
  76  * rk_sd parameters
  77  */
  78 U_BOOT_IMAGE_TYPE(
  79         rksd,
  80         "Rockchip SD Boot Image support",
  81         RK_IMAGE_HEADER_LEN,
  82         dummy_hdr,
  83         rkcommon_check_params,
  84         rksd_verify_header,
  85         rksd_print_header,
  86         rksd_set_header,
  87         rksd_extract_subimage,
  88         rksd_check_image_type,
  89         NULL,
  90         rksd_vrec_header
  91 );